Tag: spaceflight

More launch delays from Russia

10:00 am

Russia has decided to delay one of three commercial Soyuz rocket launches to 2019 due to unspecified “readiness” issues.

The launch of Soyuz-ST launch vehicle with a European satellite was initially scheduled for October 6, a source in the aerospace industry told Interfax. “However, evaluating relevant conditions and the launch vehicle’s readiness, the decision was made to move the launch to November 6,” the source said.

In all, three Russian launch vehicles were expected to take off from the Kourou Space Center by the yearend. Italy’s CSG-1 satellite was scheduled to be launched in November, which was to be followed by the launch of OneWeb’s pilot mini-satellites. Due to the delay of the European weather-forecasting satellite’s launch, the launch of two more rockets from Kourou was endangered. “One of the three launches has to be postponed until next year. This is most likely to be Italy’s CSG-1 satellite. However, a lift-off of satellites under the contract with OneWeb may be adjourned,” he said.

In addition, there was this story (behind a paywall) that noted that the only Proton-M launch in 2018 will also be delayed until 2019.

While such delays in rocket launches are not unusual and are an accepted part of the business, these delays for Russia do not help them. The technical problems in recent years that have caused many launch failures, combined with these delays, will further encourage their international customers to go elsewhere.

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Virgin Orbit gets first launch license

7:54 am

Capitalism in space: Virgin Orbit has obtained its first launch license from the FAA.

They hope to fly this first orbital flight before the end of the summer. Previously they have announced launch contracts calling for commercial launches in 2019, which requires these test flights in 2018.

Either way, it appears that, as I predicted in 2016, Virgin Orbit will achieve its first operational flight ahead of Virgin Galactic, even though the latter has been in development more than twice as long.

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More close-up images of Ceres

6:48 am

On Monday the Dawn science team released more close-up images of Ceres, taken from Dawn’s final close orbit of the dwarf planet, with the focus of this release Occator Crater and its bright spots.

The current images now show numerous sections of Occator Crater from an altitude of 35 kilometers and with a resolution less than 5 meters per pixel. “The data exceeds all our expectations,” Dr. Andreas Nathues from the MPS, Framing Camera Lead Investigator, says. In the new images, the surface is now ten times better resolved than in the best images from the previous three years.

Impressive avalanches reveal themselves in the new views of the eastern wall of Occator Crater: there are clear signs that material has been recently moving down the slopes; some of it remains stuck halfway. Other images allow a close look at the interplay of bright and dark material in the eastern part of the crater. “We now hope to understand how the bright deposits outside the crater center came about – and what they tell us about Ceres’ interior,” says Nathues. Various analyses of the past years suggest that Ceres has a water-rich crust. Small impacts and landslides regularly expose ice at the surface, which produces a thin exosphere of water vapor.

I have posted some of these images previously, but there are several new ones at the link.

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Private Japanese smallsat rocket fails at launch

8:26 pm

Capitalism in space: The second test flight of a private Japanese smallsat rocket company, Interstellar Technologies, today failed immediately at launch.

A rocket developed by a Japanese startup company burst into flames seconds after a failed liftoff Saturday in northern Japan.

The MOMO-2 rocket, developed by Interstellar Technologies, was launched in Taiki town on Hokkaido, Japan’s northernmost main island. It was supposed to reach as high as 100 kilometers (62 miles) into space. Television footage showed that the 10-meter (33-foot) pencil rocket lifted only slightly from its launch pad before dropping to the ground, disappearing in a fireball. Footage on NHK public television showed a charred rocket lying on the ground.

The incident caused no injuries.

Rocket science is hard. Competition and freedom carries risks. This company might not be dead, but this failure is definitely a significant setback.

Posted from Belize.

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SpaceX successfully launches Dragon to ISS

8:51 am

Capitalism in space: SpaceX early this morning successfully launched Dragon to ISS using its last Block 4 Falcon 9.

Both the first stage and Dragon were used components. As planned, they did not recover the first stage.

The leaders in the 2018 launch standings:

18 China
12 SpaceX
7 Russia
5 ULA
4 Japan

The U.S. and China are once again tied at 18 in the national standings.

At the moment the 2018 worldwide totals for launches is 54, and this is only for the first half of the year. As I predicted in my January review of 2017’s launch totals, we continue to trend to having more than 100 launches in 2018, the first time this has happened since before the fall of the Soviet Union. Then, the numbers were inflated because the Soviets launched a lot of out-of-date spy satellites more out of habit than practicality, which is why, when the Soviet Union fell, the launch totals dropped precipitously. Now, the numbers reflect the real commercial market in space, and suggest real sustained growth, largely fueled by SpaceX’s forcing of lower launch prices.

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Complex carbon molecules from within Enceladus

9:11 am

Scientists have determined, using Cassini data, that there are complex carbon molecules spewing from the tiger stripes on Saturn’s moon Enceladus.

Putting it all together, the scientists concluded that the Cassini spacecraft was encountering dust particles rich in carbon in large, complex “macromolecular structures”. The only place this material could have come from was the interior of Enceladus, from which ice, dust and gas is jetting out in geyser-like plumes. These plumes are fed by vapours escaping from a sub-surface ocean.

“So this is a direct sample of the Enceladus ocean,” Khawaja says.

What exactly the newly discovered organic materials are is open for debate, although Khawaja believes they most likely are made of large numbers of ring-like structures cross-linked by hydrocarbon chains. An important hint comes from the fact that the organic-rich grains don’t contain much water, implying that the materials in them don’t easily mix with water. Khawaja hypothesises that they formed deep inside Enceladus, then rose to the top of its underwater ocean, where they formed a thin film akin to an earthly oil slick.

Just to be very clear, they have not discovered life. What they have found however increases the chances that there is life within Enceladus’s underground ocean.

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Long March 2C first stage crashes into Chinese town

9:04 am

Footage showing the first stage from yesterday’s Long March 2C launch crashing into a city has now been released.

The Chinese government issues warnings and even evacuates areas calculated to be under risk of impact during these interior launches, but it appears that many locals stick around to film the event. I have embedded below the fold this most recent footage.

The fuel from the first stage of the Long March 2C is very toxic, so China is increasingly facing a bad PR problem they don’t want. They are using their space program, much like the Soviets did, to highlight China’s new first world status. Images of an out-of-control rocket crashing into populated areas does not serve that purpose well. Expect them to accelerate their efforts to either develop reusable first stages, and to abandon this launch site.
» Read more

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Rocket Lab cancels Electron launch for this launch window

8:53 am

In reviewing the motor controller problem that caused a launch scrub earlier this week, Rocket Lab has decided to cancel further launch attempts during the present launch window ending July 6.

In a statement, Rocket Lab said “the motor controller behaviour was similar to that previously identified during wet dress rehearsal operations in April.”

“This issue was analysed and corrective measures [put] in place, however a similar issue presented during yesterday’s pre-launch operational checks. All systems had previously performed nominally during a wet dress rehearsal on 16 June.”

A motor controller is a device that governs commands given to selected hardware and software systems throughout the launch vehicle.

My guess is that they are now worried about a systemic problem with the motor controllers, since the same problem has now occurred on two different units, and it has been an intermittent problem as well.

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Trace Gas Orbiter releases new images

10:28 am

Uzboi Vallis entering Holden Crater

Cool image time! Europe’s Trace Gas Orbiter, now in its science orbit around Mars, has released some new pictures (the top five images at the link). The image above shows the very long and meandering canyon Uzboi Vallis as it cuts through the rim of Holden Crater, on the right. If you click on the image you can see a higher resolution version.

With this release the European Space Agency does a very poor job of providing relevant information. It does not provide the latitude/longitude of this image, its scale, or a context image. Thus, I can only guess at its precise location.

Regardless, this area, where Uzboi Vallis enters Holden Crater, is one of the candidate landing sites for the American 2020 Mars rover. Uzboi Vallis is thought to have been formed by flowing water as it cut through a number of craters in the southern high plains.

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Fractured surface in Occator Crater on Ceres

10:03 am

fractures in Occator Crater

Cool image time! Dawn, now in its final very close orbit above the surface of Ceres, has released some new images. The image on the right, cropped to post here, was taken from a distance of only 22 miles, and shows a fracture network and some very pronounced cliffs on the wall of Occator Crater. The sunlight is coming from the right. You can also see a bright spot on an east-facing slope with what looks like an apron of lighter avalanche material below it. The flat smooth surface of the floor of this same canyon is likely because it is filled with dust, which has ponded there.

These fractures suggest that the wall of the crater is undergoing a slow motion avalanche, with sections separating off and slowly sagging into the crater below, creating the fractures.

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China launches two satellites

9:40 am

China today successfully launched what it called two “technology test satellites,” using its Long March 2C rocket.

No further information about the satellites was released. The Long March 2C is comparable to India’s PSLV rocket, and thus is used for smaller payloads.

The leaders in the 2018 launch standings:

18 China
11 SpaceX
7 Russia
5 ULA
4 Japan

This launch puts China ahead of the U.S. in the national race, 18-17, though SpaceX’s Dragon launch later this week should tie things up again.

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Arianespace lowers its launch forecast for 2018

9:29 am

Capitalism in space: Because of a launch miscue in January and a decision by India to delay a satellite launch, Arianespace today admitted that it will not meet its forecast of fourteen launches in 2018.

Arianespace, majority-owned by a joint venture of Airbus and Safran, has so far conducted only three launches, but expects a busier second half, CEO Stephane Israel said. He now expects around 11 satellite launches for the year.

There might be a similar number of launches in 2019, but it is too early to give a definitive forecast, Israel said, adding the company was now focusing on gaining customers for the lower cost Ariane 6 rocket due to debut in 2020.

The article states the launch cost for Ariane 6 will be 40% less than Ariane 5, which cost $100 million per satellite. This brings the per satellite price for Ariane 6 to $60 million, about what SpaceX presently charges. Whether that can compete with the prices that SpaceX and others will be charging in 2020, when Ariane 6 is expected to become operational, remains unknown.

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The mysterious chaos terrain of Mars

4:05 pm

In one of my weekly posts last month (dated May 14th) delving into the May image release from Mars Reconnaissance Orbiter’s (MRO) high resolution camera, I featured an image of what planetary geologists have labeled chaos terrain, a hummocky chaotic terrain that has no real parallel on Earth but is found in many places on Mars.

This month’s image MRO release included two more fascinating images of this type of terrain. In addition, the Mars Odyssey team today also released its own image of chaos terrain, showing a small part of a region dubbed Margaritifer Chaos. Below, the Mars Odyssey image is on the right, with one of the MRO images to the left. Both have been cropped, with the MRO image also reduced in resolution. The full MRO image shows what the MRO science team labels “possibly early stage chaos” on the rim of a canyon dubbed Shalbatana Vallis.

young chaos in Shalbatana Vallis

Margaritifer Chaos

» Read more

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The dying Russian space program

10:06 am

Three articles today illustrate starkly the sad state of the Russian space program.

The first story describes the serious problems for Russia’s first lunar probe in decades.

Its launch was originally scheduled for 2016 but was postponed to 2019 mainly because of lack of funding. Roscosmos allocated a budget of 4.5 billion rubles to NPO Lavochkin, Luna-Glob’s builder, as recently as October 2016.

Since then, almost everything has gone according to the plan, except with a crucial instrument called BIB, the probe’s inertial measurement unit. Provided by the Russian company NPO IT – located in the city of Korolyov, not far from ISS Mission Control – the BIB should provide the onboard computer with the necessary information to ensure guidance on the path from the Earth to the Moon.

However, BIB testing at NPO IT showed unexpected results, clearly indicating it was not working properly. The designers of this system noted it won’t be ready for the 2019 launch window, which resulted in NPO Lavochkin trying to replace it with a European equivalent called ASTRIX, designed by Airbus Defence & Space.

However, sanctions against Russia – from the European Commission in the fallout of the Ukrainian crisis – strictly forbid such a deal.

A different Russian instrument could replace BIB, but it won’t be ready in time, further delaying the mission to 2021 when many of its other instruments will be past their own due dates.

The second story describes the end of Russia’s Proton rocket, first built in the mid-1960s and since the 1990s has been its commercial workhorse. Faced with numerous failures and an inability to compete with SpaceX, it has lost its market share, and will now be replaced by Russia’s new Angara rocket. The problem is that Angara itself is not ready, and will likely not be operational until 2021, at the earliest.

The third article describes some of the reasons why Angara will take so long to be operational. Vostochny, Russia’s new spaceport, doesn’t have the necessary facilities, and it appears there is a disagreement within the Russian aerospace community about how fast those facilities can be built, or even if all are needed immediately. The top management in Roscosmos seems reluctant to switch all operations from Baikonur, probably for political reasons, while the expert quoted by the article says they should do it fast.

Either way, the entire Russian space program seems mired in bad technology, overpriced products, and poor and confused management. They have lost most of their commercial international customers, are about to lose NASA as well when Dragon and Starliner begin flying American astronauts, and do not have the resources to replace this lost income. Further, the top-down centralized management by the government of the entire aerospace industry has worsened these problems by stifling competition and innovation.

Russia might recover eventually, but for the next decade expect them to play a very minor role in space.

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The slow death of Planetary Resources

9:33 am

Link here. The article tries to put a positive spin on the company’s decline, but the facts described tell a different story, with its failure to raise investment capital essentially forcing it to shut down, with its best people leaving for greener pastures.

[The fund-raising failure] forced a sharp reduction in Planetary Resources’ workforce. How sharp? Lewicki declined to say, but LinkedIn’s listings show that a number of employees have moved on to Blue Origin, Amazon and other companies.

Several former members of the team have started up a new engineering services company called Synchronous. Maggie Scholtz, a Planetary Resources veteran who is now Synchronous’ president of aerospace and space, will be one of the speakers at the NewSpace conference. The event gets under way on Tuesday at the Hyatt Regency Lake Washington in Renton, Wash. Other Synchronous partners include Chris Voorhees, who was Planetary Resources’ chief engineer until February; Peter Illsley, Planetary Resources’ former director of mechanical and thermal engineering; Brian Geddes, former director of software; and Rhae Adams, former director of mining and energy.

Planetary Resources had to let a robotic worker go as well. Arkyd-6A, the experimental Earth-observing satellite that was launched for the company in January, is now idle in low Earth orbit.

When this company made its splashy appearance in 2012, claiming it planned to do asteroid mining, I said hogwash. They weren’t an asteroid mining company, at best they were a cubesat-sized orbiting telescope company, testing technologies for looking at asteroids.

In the end, they weren’t even that. Arkyd-6A has taken one picture of the Earth, and is not competitive with numerous other Earth-observation companies that have already launched many superior and commercially profitable satellites.

I am not optimistic for the future of this company. The lesson it provides however is important. Companies that oversell themselves should be viewed with great skepticism.

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Falcon 9 Dragon launch to set used booster turnaround record

9:19 am

Capitalism in space: The planned launch on June 29th of Dragon to ISS will set a new turnaround record for a used first stage, just over two months.

This first stage is not a Block 5 first stage, it is the last older Block 4. What this quick turnaround means for the upcoming Block 5 launches however is important.

Although CRS-15 will likely see its venerable Block 4 Falcon 9 booster expended in the ocean without a recovery attempt, the speed of Falcon 9 B1045’s refurbishment is thrilling for another, more abstract reason: if the design functions largely as intended, a Falcon 9 Block 5 booster should be able to handily crush that already impressive record with ease, and one will perhaps do just that within a handful of months of this launch.

Currently scheduled for no earlier than (NET) July 19 and late July to early August, the Telstar 19V and 18V communications satellites will require their own Block 5 launches roughly a month from today, and July 20’s Iridium NEXT-7 mission will further require its own Falcon 9 Block 5 booster for a mission from California. It remains to be seen what boosters will launch those three missions, as well as an additional two SpaceX missions tentatively scheduled for August and September.

In other words, there is a very strong likelihood that SpaceX will be reusing its Block 5 boosters almost immediately this summer.

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Ryugu from 25 miles

8:56 am

Ryugu from 25 miles

The Hayabusa-2 science team has released its first image of Ryugu, posted to the right, from a distance of only 25 miles. From the project manager:

The shape of Ryugu is now revealed. From a distance, Ryugu initially appeared round, then gradually turned into a square before becoming a beautiful shape similar to fluorite [known as the ‘firefly stone’ in Japanese]. Now, craters are visible, rocks are visible and the geographical features are seen to vary from place to place. This form of Ryugu is scientifically surprising and also poses a few engineering challenges.

First of all, the rotation axis of the asteroid is perpendicular to the orbit. This fact increases the degrees of freedom for landing and the rover decent operations. On the other hand, there is a peak in the vicinity of the equator and a number of large craters, which makes the selection of the landing points both interesting and difficult. Globally, the asteroid also has a shape like fluorite (or maybe an abacus bead?). This means we expect the direction of the gravitational force on the wide areas of the asteroid surface to not point directly down. We therefore need a detailed investigation of these properties to formulate our future operation plans.

They are going to have to spend some time in orbit to figure out not only where to land, but how to do it. More information on the mission can be found here.

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Dragon cargo fees to rise, due to NASA demands

12:12 pm

A government audit has found that the fees that SpaceX charges for its Dragon cargo missions to ISS will rise as much as 50%, and the cause of that price rise is almost entirely due to NASA redesign demands.

[T]he auditors pinned much of the blame on NASA for the increase. They also emphasized that the program still seems like a good deal for lowering launch costs. Auditors cited NASA for missing opportunities to cut redundancies and bargain on pricing, and noted that the agency forced SpaceX to (expensively) redesign its Dragon spaceship from the bottom up.

The report did hint, however, that SpaceX has done some reckoning as the startup has matured. “[SpaceX] also indicated that their CRS-2 pricing reflected a better understanding of the costs involved after several years of experience with cargo resupply missions,” the auditors wrote. (A SpaceX representative declined to comment on the report.)

None of this is a surprise. There are factions in NASA that have been working for the past decade to stymie or defeat the arrival of privately built and owned spacecraft like Dragon, as it makes the NASA-built spacecraft like Orion look bad. By demanding redesigns that raise the cost for Dragon, these factions gain ammunition to attack it. I guarantee we will see op-eds doing exactly that in the next year.

No matter. In the end the private market still does it better and cheaper than the government, as the audit found.

Despite the cost increases, the report ultimately called the CRS contracts with private companies “positive steps” for NASA — especially since the agency could find discounts by launching cargo on used SpaceX Falcon 9 rocket boosters. “NASA’s continued commitment to the commercial space industry also helps spur innovations in the commercial launch vehicle market,” the auditors said.

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A NASA astronaut’s detailed look at Dragon and Starliner

8:27 am

Link here. Lots of interesting details about both spacecraft from an experienced astronaut’s perspective.

The Commercial Crew program will launch uncrewed ships first. SpaceX is aiming to do that in September and Boeing in October. If successful, crewed launches will follow on December 31 (Boeing) and January 17 (SpaceX).

“We’ve gotten into the cockpit in both spacecraft. We’ve run through parts of the profile, from launch to rendezvous docking, un-docking, and [atmospheric] entry. But everything’s not been tied up, not quite yet,” Williams said. She didn’t say which company’s spaceship is her favorite.

In fact, crewed launch dates may slip to mid-2019. Williams said she expects NASA to announce her official mission selection this summer, and from there about a year of more deliberate mission training will follow.

This is a delay from the previously planned summer launches. This had been expected, but it also looks like both companies are trying hard to get things off the ground this year.

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SpaceX’s Falcon Heavy wins Air Force launch contract

8:45 am

Capitalism in space: SpaceX has won a $130 million Air Force contract to use its Falcon Heavy rocket to launch a military satellite.

The Falcon Heavy beat out a bid from United Launch Alliance for the mission labeled Air Force Space Command-52, or AFSPC-52, which is targeting liftoff from KSC’s pad 39A in 2020.

United Launch Alliance’s most powerful launcher, the Delta IV Heavy, has a price tag approaching $400 million.

The price comparison bears repeating: ULA: $400 million, SpaceX: $130. It is not surprising that SpaceX got the contract, though it does illustrate the difference between the Air Force’s space effort and NASA’s. The Air Force is making a concrete and real effort to lower its launch costs, using competition as a tool to do so. NASA, which faces the same kind of price comparison when comparing SLS to SpaceX, continues however to ignore that price difference and insist its future interplanetary manned programs must go with SLS, and SLS only.

In this context, I think this graph from Capitalism in Space is worth another look:

SLS vs commercial space

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UAE signs deal with Russia for UAE astronaut flight

9:50 am

The new colonial movement: The United Arab Emirates (UAE) and Russia signed an agreement this week to fly an UAE astronaut on a Russian Soyuz capsule to ISS in April 2019.

The mission will be a standard 10-day tourist mission, though of course they are not describing it like that. The announcement also does not state if the UAE paid Russia for this flight, but I expect so, just like any tourist flight. The price however was likely a lot less than Russia has been squeezing from the U.S. for its astronaut flights. UAE had also been discussing this with China, and the competition probably forced Russia to lower its price.

I had been hoping that one of the U.S.’s commercial capsules could have gotten this business, but because of the delays NASA has imposed on their initial launches, they haven’t yet flown, so they lost the chance to compete for this.

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European satellite designed to test space junk removal released from ISS

9:40 am

Europe’s RemoveDEBRIS satellite was released from ISS yesterday in preparation for its testing a variety of technologies for removing and deorbiting space junk.

The article at the link does a terrible job trying to describe this mission. Better to return to a news story from 2016, when Europe first announced this project. The video from that story, embedded below the fold, does an excellent job detailing the four experiments, which are mostly aimed at testing technologies that could be added to satellites that would make either their capture or deorbit easier.

Maybe the most interesting aspect of this mission however is how it got into space. It was launched as part of a SpaceX Dragon cargo mission. It was deployed by NanoRacks, using its privately developed deployment system attached to Japan’s Kibo module.

Launch from ISS means that the satellite’s deployment and orbit were far more controllable than if it had been launched directly into space as a secondary payload during a rocket launch. NanoRacks is selling this approach commercially, and this satellite is the largest deployed by them to date.
» Read more

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Deorbit soon for China’s second test space station module?

9:14 am

China has lowered the orbit of Tiangong-2, its second test space station module, suggesting that they intend to deorbit the station in a controlled manner in the near future.

Orbital information published by the U.S. Strategic Command’s Joint Force Space Component Command, through the Joint Space Operations Center, indicates that Tiangong-2 has moved from an altitude of around 380 by 386 kilometers down to 292 by 297 kilometers.

No announcement regarding the status of the Tiangong-2 space lab has been made. The China Manned Space Engineering Office (CMSE), which manages China’s human spaceflight and space station related missions, did not respond to a SpaceNews request for comment.

Jonathan McDowell, an astrophysicist at the Harvard-Smithsonian Center for Astrophysics, told SpaceNews that, “it seems likely that the lowering of Tiangong-2’s orbit is the first step in safely disposing of it.”

Like Tiangong-1, this module was built to test a variety of technologies required for China’s full size station, planned for assembly in the next two years. Unlike Tiangong-1, they have not lost control of it, so they will be able to deorbit it properly.

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Martian dust storm goes global

12:51 pm

Data from orbit and from Curiosity at Gale Crater confirms that the dust storm that has shut down Opportunity is now a global storm, encircling Mars.

The Martian dust storm has grown in size and is now officially a “planet-encircling” (or “global”) dust event.

Though Curiosity is on the other side of Mars from Opportunity, dust has steadily increased over it, more than doubling over the weekend. The sunlight-blocking haze, called “tau,” is now above 8.0 at Gale Crater — the highest tau the mission has ever recorded. Tau was last measured near 11 over Opportunity, thick enough that accurate measurements are no longer possible for Mars’ oldest active rover.

This will be first global storm to occur on Mars since Curiosity landed in 2012, thus giving scientists the best opportunity to study such an event.

Meanwhile, Opportunity remains silent. This does not mean it is dead, but that it doesn’t have enough sunlight to charge its batteries. It might die during this storm if the storm lasts long enough, but we won’t know one way or the other until the storm finally eases.

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Ryugu seen from 150-200 miles

8:41 am

Ryugu from 150 milesl

Cool image time! Hayabusa-2’s approach to asteroid Ryugu continues. The image to the right, cropped to post here, shows one of four images taken by the spacecraft on June 17 and June 18. In this image the distance is about 150 miles. As noted in the Hayabusa-2 press release,

The shape of the asteroid looks like a spinning top (called a “Coma” in Japanese), with the equatorial part wider than the poles. This form is seen in many small asteroids that are rotating at high speed. Observed by radar from the ground, asteroid Bennu (the destination of the US mission, OSIRIS-REx), asteroid Didymous (the target of the US DART project), and asteroid 2008 EV5 that is approaching the Earth, all have a similar shape.

On the surface of asteroid Ryugu, you can see a number of crater-like round recessed landforms. In the first image, one large example can be seen with a diameter exceeding 200m. This moves to the left and darkens as the asteroid rotates and the lower part becomes cast in shadows.

The bulge at the equator forms a ridge around the asteroid like a mountain range. Outside this, the surface topology appears very ridge-shaped and rock-like bulges are also seen. These details should become clearer as the resolution increases in the future.

Based on the visible landforms, they presently estimate Ryugu’s rotation period to be about 7.5 hours.

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