Tag: Japan

Mitsubishi wants to cut launch price of H3 rocket to $35 million

8:52 am

Mitsubishi Heavy Industries, which developed the new H3 rocket for Japan’s space agency JAXA, wants to attract commercial launch business, and to do so hopes to cut the rocket’s launch price to about $35 million.

According to the article at the link, the price for the H2A rocket that the H3 has replaced was 10 billion Japanese yen, about $70 million.

The H2A launched more than 70 satellites and other objects into space, serving as the backbone of Japan’s space transportation. However, there was an average of only two launches a year, and most depended on “public demand” for government satellites. There were only orders for commercial launches for five satellites belonging to foreign countries, such as South Korea and the United Kingdom.

…For Mitsubishi Heavy Industries, Ltd., which took over the manufacture and operation of the H2A from JAXA in 2007, winning commercial orders has been a longstanding issue. The H3 was jointly developed by MHI and JAXA with the aim of halving the launch fee.

That price listed for the H2A rocket is likely wrong, much lower than the real price, as it matches what SpaceX has been offering publicly for the Falcon 9 for more than a decade. If the H2A had been that cheap, it would have garnered some business. It did not.

Lowering the cost for the H3 rocket to $35 million would definitely be competitive in the present launch market. Whether Mitsubishi can accomplish this however remains unclear. So far there is no indication that this new rocket has attracted any more business than the H2A, but as the rocket has only just started launching it is still too early to judge.

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More successful launches today

10:44 am

Two more launches occurred this morning, one in Japan and one in the U.S.

First, Japan completed the last launch of its H2A rocket, lifting off from its Tanegashima spaceport in south Japan, placing a Japanese climate satellite into orbit. This was the 50th launch for the H2A, which has now been replaced by the as expensive H3 rocket.

Next, SpaceX continued its unrelenting launch pace, its Falcon 9 rocket lifting off from Vandenberg Space Force Base in California carrying 26 more Starlink satellites into orbit. The first stage completed its eighth flight, landing on a drone ship in the Pacific Ocean.

As Japan’s launch was only its second in 2025, it does not make the leader board of the 2025 launch race:

82 SpaceX
35 China
10 Rocket Lab
7 Russia

SpaceX still leads the rest of the world in successful launches, 82 to 61.

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Honda’s grasshopper rocket successfully completes vertical take-off and landing

10:48 am

Honda today successfully completed the first test of its own grasshopper prototype rocket, with the rocket reaching a height of 890 feet before landing vertically 56 seconds after launch.

I have embedded the video of the flight below.

Honda had announced this project back in 2021, but since then had published no updates of note. This flight indicates that project is real and is on going.

In 2021 the company said it was targeting the first orbital flights by 2030. Today’s update says it will be doing suborbital flights in 2029, which suggests the orbital flights will not occur in 2030.
» Read more

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Ispace confirms that its Resilience lunar lander has failed, apparently crashing on the Moon

8:41 pm

According to an update issued several hours after the planned landing, the Japanese lunar lander startup confirmed that its Resilience lunar lander apparently crashed in its attempt to soft land on the Moon.

Ispace engineers at the HAKUTO-R Mission Control Center in Nihonbashi, Tokyo, transmitted commands to execute the landing sequence at 3:13 a.m. on June 6, 2025. The RESILIENCE lander then began the descent phase. The lander descended from an altitude of approximately 100 km to approximately 20 km, and then successfully fired its main engine as planned to begin deceleration. While the lander’s attitude was confirmed to be nearly vertical, telemetry was lost thereafter, and no data indicating a successful landing was received, even after the scheduled landing time had passed.

Based on the currently available data, the Mission Control Center has been able to confirm the following: The laser rangefinder used to measure the distance to the lunar surface experienced delays in obtaining valid measurement values. As a result, the lander was unable to decelerate sufficiently to reach the required speed for the planned lunar landing. Based on these circumstances, it is currently assumed that the lander likely performed a hard landing on the lunar surface.

After communication with the lander was lost, a command was sent to reboot the lander, but communication was unable to be re-established.

This explanation fits with the very high velocity numbers seen as the spacecraft approached the surface, much higher than intended.

Ispace has now attempted to land on the Moon twice, with both landers crashing upon approach. In this sense its record is not quite as good as the American startup Intuitive Machines, which had two landers touch down but immediately tip over, causing both to fail.

Ispace presently has three contracts to build landers with NASA, JAXA (Japan’s space agency), and the European Space Agency. The American lander is being built in partnership with the company Draper. Whether this second failure today will impact any of those contracts is uncertain at this time.

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Watch the landing attempt of Ispace’s Resilience lunar lander

9:34 am

Map of lunar landing sites
Landing sites for both Firefly’s Blue Ghost and
Ispace’s Resilience

I have embedded the live stream below of the landing of the Japanese startup Ispace’s Resilience lunar lander, presently scheduled to occur at 3:17 pm (Eastern) today (June 6, 2025 in Japan).

The live stream goes live at about 2:00 pm (Eastern).

Resilience will attempt to land on the near side of the Moon at 60.5 degrees north latitude and 4.6 degrees west longitude, in the region dubbed Mare Frigoris (Latin for “the Sea of Cold”), as shown on the map to the right. That map also shows a number of other landings on this quadrant of the Moon, including Ispace’s previous failed attempt with its first lander, Hakuto-R1, in Atlas Crater in 2023.

For Ispace, today’s landing is critical for its future. It has contracts for future three landers with NASA, with Japan’s space agency JAXA, and with the European Space Agency, but a failure today could impact whether those contracts proceed to completion.
» Read more

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Ispace borrows $35 million

9:01 am

Ispace landing map
Resilience’s landing zone in Mare Frigoris

The Japanese lunar lander startup Ispace announced last week that it has obtained a new bank loan totaling $35 million from the Japanese bank Mizuho to help pay its ongoing expenses as its Resilience lunar lander attempts the company’s second try at soft landing on the Moon.

The loan is intended to secure working capital for development of mission and other related expenses. Through this financing, ispace intends to strengthen the company’s liquidity position and stabilize its financial foundation, thereby enabling agile management decisions.

In other words, the company had started to run short of cash, and needed this loan to keep operating. It had previously gotten a government loan of almost $6 million, but that did not have to be paid back for ten years. Back in 2018 it raised $90 million in investment capital, followed by an additional $53 million in 2024.

This loan suggests that Ispace might be in serious financial trouble if Resilience fails to soft land on June 5, 2025, as presently planned. The company already has two future lander contracts, one with NASA and one with Japan’s space agency JAXA, but a second failure now might cause those agencies to have second thoughts.

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Japan’s Hayabusa-2 asteroid probe in safe mode

9:29 am

Japan’s Hayabusa-2 asteroid probe, which had successfully dropped off samples from the rubble-pile asteroid Ryugu in 2020 and then was sent on a long journey to visit two more asteroids, has suffered an unknown anomaly and shifted into safe mode to protect its instruments.

Communications between Earth and the spacecraft were stable, however, and teams were investigating the situation and its impact on the extended mission, a machine translation of the post read. JAXA has yet to provide a new update since posting about the anomaly.

If engineers can identify the problem and bring the spacecraft back into full operations, the hope is that it will fly past another asteroid in 2026 on its way to a third in 2031, where it will remain for a period of time doing more detailed observations.

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After a decade of development, ESA finally starts testing a part of its Callisto grasshopper

9:12 am

Callisto's basic design
Callisto’s basic design

My heart be still! First proposed in 2015 as Europe’s answer to SpaceX’s Falcon 9, the European Space Agency, in partnership with Japan, has finally begun acoustical testing of just one part of its Callisto grasshopper-type reusable test prototype, as shown on the right.

Callisto consists of five main sections: the Aft Bay, which includes the engine and landing legs, the LH2 Tank, the LOx Tank, the VEB, and the Fairing. The VEB houses much of the demonstrator’s electronics, including its onboard computer, avionics, and a reaction control system that uses H2O2 propellant. Its distinctive features include a pair of control fins.

In addition to confirming that the VEB had been transported to the CNES facilities in Toulouse, the 4 March Institute of Space Systems update also revealed that the acoustic test campaign for the key Callisto module had commenced last week. The acoustic test campaign simulates the intense sound vibrations the demonstrator will experience during flight to ensure structural integrity and component reliability.

The whole project has a budget of $100 million. The first test hop won’t occur until 2026, eleven years after the project began, and six years behind its original launch date. In that same time, SpaceX has completed several hundred commercial landings of its Falcon 9 first stage, reusing those stages up to two dozen times.

Nor is Callisto part of any program to develop a similar reusable rocket. It is a typical dead-end government project, with ESA having no clear goal to apply it commercially. The best Europe can hope for is that the engineering lessons from its tests will be given freely to the new European commercial rocket startups, so that they can use it someday.

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Rocket startup Interstellar receives another grant from Japan

8:51 am

The Rocket startup Interstellar announced on February 21, 2025 that Japan’s program to encourage commercial space has awarded it a new $9.3 million grant, bringing the total amount the company has received to approximately $53 million.

The SBIR is a 3 phased governmental program aimed to promote the implementation of advanced technologies developed by startups in Japan. Interstellar was selected in September 2023 under the space section focused on the “Development and Demonstration of Private Launch Vehicles” were the company received up to ¥2 billion [$13.3 million] in funding for Phase 1. After passing the review for Phase 2 in September 2024, another maximum of ¥4.6 billion [$30.8 million] were awarded.

In addition, in early January Toyota invested $44 million in this startup.

This story indicates that the Japanese government is finally moving to encourage private commercial space. It had announced this grant program in late 2023, but its bureaucracy had initially seemed reluctant to issue grants. This appears to be finally changing.

Interstellar is in itself an interesting story. Five years ago it appeared to be aggressively building its Zero rocket. It then disappeared. I figured its investment capital had dried up and the company had shut down. It seems it has now been reborn.

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Rocket Lab wins another multi-launch contract

9:26 am

Rocket Lab today announced it has won a four-launch contract with a Japanese company, the Institute for Q-shu Pioneers of Space, Inc. (iQPS), to launch its Earth-imaging satellites.

The multi-launch contract, signed in July 2024 [but apparently not publicly announced till now], includes three dedicated missions for launch in 2025 from Rocket Lab Launch Complex 1 in New Zealand, with a fourth launch scheduled for 2026. Each mission will carry a single satellite to form part of iQPS’ planned constellation of 36 synthetic aperture radar (SAR) satellites that are capable of collecting images through cloud and at night with a high resolution of less than a meter.

Rocket Lab previously completed one launch for iQPS in 2023, signing the contract and launching within four months.

Though the company has not yet announced officially the number of launches it hopes to fly in 2025, it appears the number will exceed the 14 orbital launches it completed in 2024. Before adding the three 2025 iQPS launches above, Rocket Lab had 18 Electron launches listed for 2025 at the rocketlaunch.live website, as well as the first launch of the company’s new Neutron rocket. Altogether that adds up to a total of 22 launches.

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Japan’s H3 rocket successfully completes its fifth launch

9:40 am

Japan’s space agency JAXA early today successfully launched the sixth satellite in that country’s GPS-type constellation, its new H3 rocket lifting off from the Tanegashema spaceport in south Japan.

This was the rocket’s fifth launch, and the first for Japan this year. The link goes to the JAXA live stream, cued to T-30 seconds. Though it now also provides English translation, JAXA still insists on having an announcer count off every second, several minutes prior to and after launch, something that is incredibly annoying and distracting, and entirely unnecessary.

The 2025 launch race:

14 SpaceX
6 China
1 Blue Origin
1 India
1 Japan

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Japan’s government wants its private sector to do all its future space station work, not its space agency JAXA

9:05 am

In a major shift of power away from its government, the Japanese science and technology ministry is presently drafting a policy that would have that country’s private sector lead all work that Japan does on any of the future commercial private space stations being built, not its space agency JAXA as has been done now for decades.

The draft policy specifies how Japan will be involved with the next space station. According to the draft, “the private sector will have such responsibilities as managing [the new space station], and JAXA will support its use.”

JAXA is currently responsible to the management and maintenance of the ISS and serves as the point of contact for its commercial use. However, the government will select a Japanese private-sector company to be the point of contact for the next space station. When JAXA, research institutes or other companies plan to use the ISS, they will have to contact the next station’s point of contact.

While Japan wants to have one of its own modules on one of the commercial stations, as it presently has on ISS, it appears the government does not want JAXA to lead this project. Instead, it wants Japan’s private sector to run the show by working out its own deals with the private commercial stations. At present the Japanese company Mitsui is partnering with Axiom on its station, so this is likely the first station where a deal could be worked out.

It seems that Japan is trying to poke its private sector out of its doldrums. Right now that sector seems unable to take any action on its own. It sits and waits for guidance from the government before acting, and even then acts timidly, waiting to see if the government approves of each step. What the Japanese government now wants instead is some independent action, not linked to government policy.

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Japan identifies a Chinese hacker group as the source of 210 attacks since 2019

9:23 am

The Japanese government has now identified a Chinese hacker group — dubbed “MirrorFace” and likely working with government support and direction — as the source of 210 attacks from 2019 to 2024.

Investigations by the agency’s National Cyber Department and police nationwide found that the malware used by MirrorFace was similar to that employed by the “APT10 Group,” a hacker organization said to be associated with China’s Ministry of State Security.

The targets also aligned with China’s areas of interest and the attacks coincided with Chinese working hours, ceasing during the country’s long holidays, police noted.

Though Japan’s space agency JAXA was a major target, it appears the hackers had many successes with other government agencies, including those related to national security.

This story only adds weight to the previous reports [pdf] of Chinese hacks of JPL, whereby China got the plans of our Spirit and Opportunity Mars rovers and used that information to design Zhurong, its first rover to go to Mars.

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Second launch attempt by Japanese rocket startup fails about 90 seconds after liftoff

1:11 am

Japanese spaceports
Japanese spaceports

The second orbital launch attempt by Japanese rocket startup Space One of its Kairos rocket failed about 90 seconds after liftoff when the rocket started to spiral out of control and mission controllers were forced to destroy it.

The link above starts just before launch. You can see the rocket begin to fly out of control, and start spiraling. Shortly thereafter it disappears from view.

The map to the right shows the location in Japan of its private launch facility, dubbed Spaceport Kii. The spaceport of Japan’s space agency JAXA, where all of the country’s previous launches have taken place, is at Tanegashima on a island in the south of Japan.

Space One’s first orbital attempt failed in March when the rocket blew up mere seconds after lift-off.

The company has some major Japanese investors, including Canon Electronics and Mitsubishi, so I would expect it will have the finances to try again.

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Ispace awarded $5.83 million loan from Japanese government

10:01 am

Ispace landing map

The planetary lander startup Ispace today announced that it has been awarded a $5.83 million loan from the Japan Finance Corporation, a government corporation designed to issue loans to encourage Japanese businesses.

The money will be issued this month, and Ispace will have ten years to pay it back. Depending on whether the company is profitable or not, the interest rate will be either 0.5% or 4.15%.

Ispace’s one lunar landing attempt so far, Hakuto-R1, was a failure when its software thought it was close to the ground at three miles altitude and shut off its engines. The company however is going to try again, with the launch of its second lander, dubbed Resilience, scheduled for a January 2025 launch. It will also carry the company’s own Tenacious micro-rover, and will hopefully land as shown in the map to the right, in the north of the Moon’s near side.

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Japan’s space agency admits first launch of its new Epsilon-S rocket will be delayed

10:01 am

Japan’s space agency JAXA yesterday admitted that the first launch of its new Epsilon-S rocket — intended to be cheaper and competitive with the new rockets being developed worldwide — will be delayed because of the explosion that occurred during a static fire test on November 26, 2024.

The news reports in the Japanese press don’t provide much information. It appears the investigation into the explosion is still on-going, and that the cause of the failure has not yet been identified. Because of this, JAXA has been forced to cancel the planned March 2025 date for Epsilon-S’s inaugural flight.

JAXA should get out of the business of building rockets, as its track record is really horrible. The Japanese government has already told it to do so, but it is clearly dragging its feet, not wanting to give up the turf it has controlled for decades.

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Japan awards $32.5 million contract for lunar GPS-type satellite constellation to startup

9:52 am

Capitalism in space: As part of the multi-billion dollar fund the Japanese government has allocated to encourage private enterprise by new Japanese startups, its space agency JAXA has now awarded a $32.5 million development contract to the startup ArkEdge Space to design and fly a GPS-type satellite in orbit around the Moon, thus demonstrating the technology.

Under the agreement, ArkEdge Space will plan and design the mass production and operation of micro-satellite constellations to lead the development of a next-generation Lunar Navigation Satellite System (LNSS), a vital component to the International “LunaNet” initiative driven by National Aeronautics and Space Administration (NASA), European Space Agency (ESA) and JAXA. LunaNet seeks to establish essential infrastructure to support sustainable lunar exploration and foster the growth of the lunar economy.

The real significance of this contract award is that it signals JAXA’s growing shift from designing, building, and owning everything to simply becoming the customer who gets what it needs from the private sector. The Japanese government had established that fund for this express purpose, but JAXA has shown a reluctance to proceed, as it directly threatens its turf. This award indicates that reluctance is finally being pushed aside.

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Engine for Japan’s new Epsilon-S rocket explodes during static fire test

9:36 am

For the second time in a row an engine for Japan’s new Epsilon-S rocket has exploded during a static fire test.

The test was conducted inside of the restricted area at Japan’s Tanegashima Space Center in southwestern Japan, and the Japan Aerospace Exploration Agency is investigating, Chief Cabinet Secretary Yoshimasa Hayashi told reporters.

An Epsilon project manager, Takayuki Imoto, told an online press conference from Tanegashina that the explosion occurred 49 seconds into the planned two-minute test, causing fire and scattering broken parts of the engine and damaging the facility.

The Epsilon-S is being built by Japan’s space agency JAXA. It is intended to replace the solid-fueled Epsilon rocket that was initially conceived in 2013 to lower launch costs and provide JAXA with a rocket that could complete with the many new smallsat rocket startups worldwide. That rocket however only launched six times and never achieved its goals. JAXA had been targeting March for the first launch of Epsilon-S, but that is now unlikely, especially considering these two engine failures during tests.

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The first cubesat launched using wood for its side panelling

9:29 am

One piece of cargo carried by the cargo Dragon to ISS earlier this week is the first cubesat ever to use wood for its side panelling.

Made by researchers in Japan, the tiny satellite weighing just 900g is heading for the International Space Station on a SpaceX mission. It will then be released into orbit above the Earth. Named LignoSat, after the Latin word for wood, its panels have been built from a type of magnolia tree, using a traditional technique without screws or glue.

Researchers at Kyoto University who developed it hope it may be possible in the future to replace some metals used in space exploration with wood. “Wood is more durable in space than on Earth because there’s no water or oxygen that would rot or inflame it,” Kyoto University forest science professor Koji Murata told Reuters news agency. “Early 1900s airplanes were made of wood,” Prof Murata said. “A wooden satellite should be feasible, too.”

The satellite’s frame is still metal, but by using wood for its side panelling the engineers hope to test the feasibility of wood as a in-space construction material.

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Japan launches military communications satellite

9:12 am

Japan today successfully launched a military communications satellite on the fourth launch of Mitsubishi’s new H3 rocket.

Liftoff occurred at Japan’s Tanegashima spaceport on the southern end of Japan’s island chain.

This was Japan’s fifth launch in 2024, the most launches it has accomplished in a single year since it completed six in 2018. As such the leader board in the 2024 launch race remains unchanged:

107 SpaceX
49 China
12 Russia
11 Rocket Lab

American private enterprise still leads the rest of the world combined in successful launches 124 to 74, while SpaceX by itself still leads the entire world, including American companies, 107 to 91.

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Mitsuibishi’s H3 rocket wins launch contract from UAE

8:55 am

Capitalism in space: The United Arab Emirates (UAE) yesterday announced that it has awarded the launch contract for its first unmanned probe to the asteroid belt to the Japanese company Mitsuibishi and its new H3 rocket.

The UAE Space Agency (UAESA) announced Oct. 10 it selected Mitsubishi Heavy Industries to launch its Emirates Mission to the Asteroid Belt (EMA) on an H3 rocket in the first quarter of 2028. Terms of the contract were not disclosed.

The spacecraft, also known as MBR Explorer after Sheikh Mohammed bin Rashid Al Maktoum, Crown Prince of Dubai, will fly by six main belt asteroids between 2030 and 2033 before rendezvousing on a seventh, Justitia, in 2034, later deploying a lander.

This mission is the third that the UAE has selected MHI to launch. An H-2A rocket launched the Emirates Mars Mission, a Mars orbiter, in 2020, while KhalifaSat, a remote sensing satellite, launched as a secondary payload on another H-2A in 2018.

What makes this launch contract different from the previous two is that the winner is Mitsubishi. Previous awards went through Japan’s space agency JAXA, which appeared to manage the H2A entirely. Now, Mitsubishi is in control, and is working directly with its customer.

This change proves that Japan’s government effort to promote private enterprise in space is real, that though it has been slow to wrest bureaucratic control from JAXA, that wresting is happening nonetheless.

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More details revealed of computer hacking of Japan’s space agency last year

9:24 am

According to a news article yesterday, the hacking of the computer systems of Japan’s space agency JAXA last year was far more extensive than first revealed, involving multiple attacks that obtained a great deal of data from many third parties, both governmental and commercial, and included the takeover of the accounts of five of JAXA’s nine-member board.

In the first attack, hackers stole the personal data of about 5,000 employees of JAXA and its related companies—nearly everyone with personal data on the computer network at the time. A JAXA investigation found that hackers took over accounts of about 200 of those individuals, including many senior JAXA officials, and gained unauthorized access to information, the sources said. The 200 hijacked accounts included those of about five directors on the nine-member board at the time, including President Hiroshi Yamakawa, the sources said. Hackers apparently targeted the accounts of directors and other senior officials who are authorized to access information on JAXA’s negotiations with outside parties, the sources said.

…According to the in-house investigation, Microsoft Corp.’s cloud service Microsoft 365 was compromised in the June 2023 cyberattack. More than 10,000 files of information stored on Microsoft 365 could have been leaked, the sources said. Of those, more than 1,000 files were provided by outside parties, including more than 40 companies and organizations with which JAXA had concluded non-disclosure agreements. Thse 40-plus entities include NASA, the European Space Agency, Toyota Motor Corp., Mitsubishi Heavy Industries Ltd. and the Defense Agency.

The source of the attacks was not indicated, but based on past hacks both of JPL and JAXA, China is the prime suspect. That country has routinely worked to steal technology from others. We should therefore not be surprised if Chinese space designs continue to resemble western concepts, down to the smallest nails.

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A new map of the magnetosphere of Mercury

12:11 pm

Map of Mercury's magnetosphere
Click for original.

Using data obtained during the June 2023 fly-by by the European-Japanese probe BepiColombo, scientists have now published a new detailed map of the magnetic field that surrounds Mercury.

That map is to the right. From the caption:

A textured sphere representing Mercury is shown with magnetic field lines compressed on the sunward side and streaming out into a tail on the nightside. The BepiColombo spacecraft’s trajectory is drawn passing through the magnetosphere from dawn to dusk, close to the planet’s surface. Various features in the magnetosphere are depicted and labelled with text. Following the order in which they were detected by the spacecraft, this includes the bow shock, magnetopause, low-latitude boundary layer, cold ion cloud, plasma sheet horn and ring current.

You can read the peer-reviewed paper here [pdf]. Note that this research does not include data obtained during BepiColumbo’s fourth fly-by of Mercury in September. Furthermore, the spacecraft will do two more fly-bys before arriving in orbit in 2026, where it will then separate into two separate orbiters in complementary orbits. Thus, this magnetic map of Mercury is merely a rough draft, and will be significantly refined by the end of the mission.

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Ispace targeting a December launch for its second attempt to softland on the Moon

10:41 am

Landing zone for Resilience lander

At a press conference yesterday officials of the Japanese company Ispace announced that they are now targeting a December 2024 launch of their second Hakuto-R lunar lander, dubbed “Resilience”, with the landing site located in the high mid-latitudes of the near-side of the Moon.

The map to the right indicates that location, inside Mare Frigoris. Atlas Crater is where Ispace attempted but failed to soft land its first lunar lander, Hakuto-R1, in April 2023.

This new lander will be launched on a Falcon 9 rocket. It carries six commercial payloads. It also appears the company decided to go for an easier landing site on this second mission. Rather than try to land inside a crater, it is targeting a very large and flat mare region, thus reducing the challenges presented to its autonomous software.

Ispace already has contracts both with NASA ($55 million) and Japan’s JAXA space agency ($80 million) for two more future landers, so a successful landing this time is critical to the company’s future.

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Due to thruster problem, the Mercury orbiter BepiColombo will arrive at Mercury almost one year late

9:05 am

The joint ESA and JAXA Mercury mission BepiColombo will now reach its destination eleven months late because its ion electric thrusters are producing less thrust than expected.

The spacecraft is actually made up of two orbiters, one built by the European Space Agency (ESA) and the second built by Japan’s space agency JAXA. During launch and the journey to Mercury each is attached to a third spacecraft called the Mercury Transfer Module (MTM), which has the large electric ion thrusters used for making the mid-course corrections prior to and after each fly-by of the Earth (once), Venus (twice), and Mercury (six) before finally entering orbit around Mercury. It has already completed the Earth, Venus and three Mercury fly-bys.

In April 2024 engineers discovered that during a mid-course correction on April 26st the MTM’s thrusters failed to produce the desired thrust.

Engineers identified unexpected electric currents between MTM’s solar array and the unit responsible for extracting power and distributing it to the rest of the spacecraft. Onboard data imply that this is resulting in less power available for electric propulsion. ESA’s BepiColombo Mission Manager, Santa Martinez explains: “Following months of investigations, we have concluded that MTM’s electric thrusters will remain operating below the minimum thrust required for an insertion into orbit around Mercury in December 2025.”

In order not to lose the mission entirely, the science team has come up with a new trajectory that will have it fly past Mercury on its fourth fly-by on September 4, 2024 only 103 miles above the surface, 22 miles closer than originally planned. This will give it a larger slingshot speed boost to help make up for the under-powered thrusters. It will then make its planned fifth and sixth Mercury fly-bys in December ’24 and January ’25, the adjusted route having it arrive in Mercury orbit eleven months later than planned, in November 2026.

This new plan however means that the pictures taken this week during the Mercury fly-by will provide some nice high resolution details, far better than those produced by the earlier fly-bys.

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JAXA finally shuts down SLIM operations after four months of no contact

9:14 am

SLIM's last image
Click for original image.

Japan’s space agency JAXA today announced that it has now closed down all further attempts to contact its SLIM lunar lander on the surface of the Moon.

The Japan Aerospace Exploration Agency (JAXA) concluded operations of the Smart Lander for Investigating Moon (SLIM) on the lunar surface at 22:40 (JST), on August 23, after being unable to establish communication with the spacecraft during the operational periods from May to July*, following the last contact on April 28, 2024.

SLIM was launched onboard the H-IIA Launch Vehicle No.47 (H-IIA F47) on September 7, 2023 from the Tanegashima Space Center and achieved Japan’s first Moon soft landing on January 20, 2024. The landing precision was evaluated with a position error of approximately 10 meters from the target point, confirming the world’s first successful pinpoint landing. In addition, the Multi-Band Camera (MBC) successfully performed spectral observations in 10 wavelength bands on 10 rocks, exceeding initial expectations. Further, despite not being part of the original mission plan, the spacecraft was confirmed to survive three lunar nights and remained operational, demonstrating results that surpassed initial goals.

The lander’s main goal was to demonstrate the ability to do a precise robotic landing within a 100 meter landing zone. And even though one nozzle fell off during landing, resulting in SLIM landing on its side, it accomplished that goal and then survived three lunar nights, exceeding significantly its expected ability to function in harsh lunar environment.

The image to the right, reduced to post here, was taken by SLIM just before it was shut down for its first lunar night. It looks to the southeast across the width of 885-foot-wide Shioli Crater, the opposite rim the bright ridge in the upper right about a thousand feet away.

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Astroscale signs deal with JAXA to de-orbit old rocket upper stage

9:52 am

abandoned upper stage, taken by ADRAS-J
Click for original image.

The Japanese orbital tug startup Astroscale has now signed the final deal with Japan’s space agency JAXA to de-orbit the old H2A rocket upper stage that the company is presently flying a demonstration rendezvous and proximity mission dubbed ADRAS-J.

The photo to the right was taken by ADRAS-J in the spring, shortly after it rendezvoused with the stage. The data from this demo mission has not only shown Astroscale’s spacecraft can autonomously rendezvous and fly in close formation to the stage, the stage itself is in excellent condition after fifteen years in space.

The ADRAS-J follow-on active debris removal spacecraft, ADRAS-J2, will similarly attempt to safely approach the same rocket body through [rendezvous and proximity operations], obtain further images, then remove and deorbit the rocket body using in-house robotic arm technologies.

If successful, Astroscale will have the capability to offer this surface to others, both governments and private concerns, thus making the removal of space junk a viable business. Until the past decade, most upper stages ended up in orbit where they remain for long periods. There are a lot of such older stages. Some end up burning up in the atmosphere harmlessly, while others break up in orbit and produce a lot of debris that is a threat to other spacecraft. Astroscale’s mission here will demonstrate the ability to remove such stages.

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Orbital tug startup Astroscale expands partnership with European aerospace giant Airbus

9:36 am

The Japanese-based orbital tug startup Astroscale has signed an agreement with the European company Airbus to expand their partnership beyond an earlier agreement to use Airbus’s robot arm on Astroscale’s tug.

Under the MoU, Astroscale and Airbus will explore ways to boost the development of navigation and docking technologies for satellite servicing and debris removal missions they did not specify. According to the news release, the expanded partnership seeks to combine Airbus’s satellite manufacturing and space systems heritage with technologies Astroscale is developing for in-orbit servicing.

Astroscale has been aggressively working to get business both in Europe and the U.S. by opening divisions in both regions. This deal is clearly part of that effort. It also provides Astroscale resources as a new startup it previously did not have.

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First flight of government-built hopper to test vertical landings delayed two years

10:12 am

Callisto's basic design
Callisto’s basic design

This story about a first stage government-built Grasshopper-type rocket designed to demonstrate and test vertical landing has instead become a perfect demonstration of why governments should not design, build, and own anything.

It appears the first test flight of the Callisto test rocket, first proposed in 2015 and being built by a joint partnership of the German (DLR), French (CNES), and Japanese (JAXA) space agencies, has now slipped from 2024 to 2026.

Earlier this month, CNES deployed a refreshed website. Prior to that deployment, the agency’s Callisto project page had stated that the rocket’s first flight would occur in 2024. The new Callisto project page has a more detailed timeline, stating that the detailed design phase will be completed by the end of 2024. Vehicle integration in Japan is then expected in 2025, followed by a first launch from the Guiana Space Centre between 2025 and 2026. This revision outlines an approximate two-year slip in the project’s timeline. [emphasis mine]

These three agencies took almost a decade to simply conceive and design the project. Apparently they not yet even built anything. This despite a budget of slightly less than $100 million carved out of the entire budget for creating the Ariane-6 expendable. Compare that with SpaceX, which conceived its Grasshopper vertical test prototype in 2011, began flying that year, and resulted in an actual Falcon 9 first stage landing in 2015.

Will Callisto ever fly? Maybe, but don’t expect it to produce a rocket that is financially competitive with SpaceX. Instead, expect these three government agencies to subsidize its cost in order to make its price competitive on the open market. More likely Callisto will fly a few times, but will likely result in no new orbital rocket. Instead it will be superseded by the private rocket startups worldwide that are now building actual orbital rockets and will likely make them reuseable before Callisto even leaves the ground.

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