Tag: China

Did pieces of a Chinese upper stage land in middle of Mediterranean last week?

11:44 pm

According to a tweet from a Twitter account that specializes in reporting on the Chinese space program, at least one piece of the upper stage from the Long March 2F rocket that launched the present Tiangon space station crew on the Shenzhou-14 crashed into the middle of Mediterranean Sea when the stage’s orbit decayed.

Most parts burned during the reentry while small debris splashed in Mediterranean Sea around E5.2° N39.1°

According to both this Twitter site as well as the Aerospace Corporation’s re-entry site, the event occurred on June 20, 2022. The latter site however says the stage burned up over the Atlantic, though it also indicated a one hour margin of error both before or after that time. If the stage thus stayed up just a bit longer, its orbit would have brought it down exactly where the former site states.

If this is so, it indicates that the Chinese either could not or made no effort to control the de-orbit, something that should be standard for any upper stage that has mass that could hit the ground.

Hat tip from reader Jay.

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LRO scientists locate impact on Moon from rocket stage believed to be Chinese

10:26 am

Impact, before and after

The science team for Lunar Reconnaissance Orbiter (LRO) today released images identifying the location on the Moon where a mystery rocket stage crashed in March 2022.

The image to the right shows the before and after LRO images, with the impact at the center of the second photo, showing as two superimposed craters. Since the sunlight in the second image come from the opposition direction as the first, the shadows in all previously existing craters are reversed.

Surprisingly the crater is actually two craters, an eastern crater [59 feet diameter] superimposed on a western crater [52 feet diameter]. The double crater was unexpected and may indicate that the rocket body had large masses at each end. Typically a spent rocket has mass concentrated at the motor end; the rest of the rocket stage mainly consists of an empty fuel tank. Since the origin of the rocket body remains uncertain, the double nature of the crater may help to indicate its identity.

No other rocket body impacts on the Moon created double craters. The four Apollo SIV-B craters were somewhat irregular in outline (Apollos 13, 14, 15, 17) and were substantially larger [>115 feet in diameter] than each of the double craters. The maximum width [95 feet] of the double crater of the mystery rocket body was near that of the S-IVBs.

Though the evidence strongly points to this stage being from China, that fact is not certain, and China denies that conclusion.

Regardless, the unexpected double nature of the impact only increases the mystery, as it suggests that rocket stage had a mass distribution different than past stages.

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China and Europe complete launches

8:47 am

In the past 24 hours both Europe and China successfully completed launches.

First Arianespace’s Ariane-5 rocket yesterday launched two commercial communications satellites, for Malaysia and India. With this flight the Ariane-5 rocket has only four flights to go before it is retired and replaced with ArianeGroup’s not-yet flown Ariane-6 rocket.

Then, China today used its Long March 2D rocket to launch three remote-sensing satellites.

The leaders in the 2022 launch race:

26 SpaceX
20 China
8 Russia
3 Rocket Lab
3 ULA
2 Europe (Arianespace)

The U.S. still leads China 35 to 20 in the national rankings, and the entire world combined 35 to 33.

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China’s Kuaizhou-1A smallsat rocket launches technology test satellite

8:47 am

China today used its smallsat solid rocket Kuaizhou-1A to put a technology test satellite into orbit.

The Kuaizhou-1A rocket is not the same as the Kuaizhou-11 rocket, which some have speculated exploded during a static fire test in the fall of ’21. Both are part of a family of rockets designed for fast launch.

The leaders in the 2022 launch race:

26 SpaceX
19 China
8 Russia
3 Rocket Lab
3 ULA

The U.S. still leads China 35 to 19 in the national rankings, and the entire world combined 35 to 31.

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Evidence of explosion in ’21 detected from orbital images of Chinese launchpad

9:46 am

Explosion at Chinese spaceporty
Click for full image.

Using orbital images, an amateur space observer has detected evidence that an explosion had occurred at the Chinese Jiuquan spaceport some time in October 2021.

Evidence of the explosion was discovered by space enthusiast Harry Stranger using imagery from Airbus and CNES and posted on Twitter June 10.

The incident occurred at facilities constructed around 16 kilometers to the southwest of Jiuquan’s two main launch complexes. The pair of launch pads are used by the China Aerospace Science and Technology Corporation (CASC) for hypergolic Long March rocket launches for human spaceflight, civil, military and scientific missions and were unaffected by the blast.

…Further satellite imagery from Planet’s Super Dove satellites seen by SpaceNews indicates that the explosion occurred between 0316 UTC on Oct. 15 and 0407 UTC Oct. 16 (11:16 p.m, Oct. 14 and 12:07 a.m. October 16 Eastern).

At almost exactly the same time China had launched a manned mission from this same spaceport, so the explosion apparently was not related to that launch. Instead, the images suggest that this was related to testing of solid rockets, and could be related as well to the delay in any further launches of the Kuaizhou-11 rocket. According to a press release several months earlier, that rocket was being prepared for a launch by the end of 2021, but no such launch ever occurred.

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Chinese scientists detect a fast radio burst that defies the theories

10:08 am

The uncertainty of science: Using their large FAST radio telescope, Chinese scientists revealed this week that they have detected a new fast radio burst (FRB) whose behavior and location does not fit the present tentative theories for explaining these mysterious deep space objects.

The FRB was an exception from the beginning as it flared again and again in observations recorded by the Five-hundred-meter Aperture Spherical radio Telescope (FAST), which nestles among the hills of China’s Guizhou province. The multiple flares put the source among the few percent of FRBs that repeat. But unlike most repeaters, this one doesn’t have any apparent cycle of bursting and quiescence.

“FRB 20190520B is the only persistently repeating fast radio burst known so far, meaning that it has not been seen to turn off,” Li says.

In addition, whatever made the FRB is also emitting a constant buzz of radio waves. Astronomers have found an association with a persistent radio source in only two other FRBs, and for one of these the low-level radio waves seem to come from ongoing star formation in the host galaxy. For FRB 20190520B, though, the radio source is far more compact, and Li’s team thinks the radio waves probably come from the FRB source itself.

The data also suggests the location does not fit the theories, and even suggests that FRBs might not all come from magnetars, as presently proposed.

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France signs Artemis Accords

8:35 am

The U.S. State Department yesterday announced that France has become the twentieth nation to sign the Artemis Accords.

The full list of signatories so far: Australia, Bahrain, Brazil, Canada, Columbia, France, Israel, Italy, Japan, Luxembourg, Mexico, New Zealand, Poland, Romania, Singapore, South Korea, the United Kingdom, the United Arab Emirates, the Ukraine, and the United States.

France’s signing is a major breakthrough, as both it and Germany, major players in the European Space Agency, have appeared to resist signing on because to do so would have limited their ability to partner with Russia on space projects (Russia opposes the accords). The Ukraine War has apparently ended France’s resistance. It no longer has any partnerships with Russia, and is not likely to form any new ones in the near future.

We should expect Germany to sign on in the near future as well.

As I wrote in May, the future factions in space are now becoming clearer. On one side we have the American Alliance, signers of the accords who support private property. On the other we have Russia and China, who oppose the accords because they also oppose private property.

In May I also included a third faction, made up of non-aligned space powers. That faction now appears to be fading away, though it still includes Germany and India.

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China launches three astronauts to Tiangong station

8:42 pm

The new colonial movement: Using its Long March 2F rocket, China has successfully launched three astronauts into orbit for a six month mission to its Tiangong space station.

The crew will be transported to the station in China’s Shenzhou capsule, docking about six hours after launch. During this mission China will also launch the last two large modules planned for the station, completing its initial construction by the end of the year.

I have embedded the live stream below the fold, cued to just before launch.

The leaders in the 2022 launch race:

22 SpaceX
18 China
8 Russia
3 Rocket Lab
3 ULA

The U.S. still leads China 31 to 18 in the national rankings, as well as the entire globe combined, 31 to 29.

» Read more

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China launches nine satellites for commercial data constellation

9:16 am

China today used its Long March 2C rocket to launch the first nine satellites in a commercial data collection constellation.

Owned by GeeSpace, a subsidiary of Geely Technology Group, the satellite constellation will be mainly used to research and validate technologies, such as travel services of intelligent connected vehicles, and vehicle/mobile phone and satellite interaction. It will also provide data support for marine environmental protection.

The leaders in the 2022 launch race:

22 SpaceX
17 China
7 Russia
3 Rocket Lab
3 ULA

The U.S. still leads China 31 to 17 in the national rankings, and the entire world combined 31 to 27.

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China begins preparing Long March 5B for launch of next space station module

9:47 am

The new colonial movement: The Long March 5B rocket that will launch in July the next large module for China’s Tiangong space station, dubbed Wentian, has arrived at the launch site.

China’s Long March-5B Y3 rocket, which will launch lab module Wentian for the country’s space station, arrived on Sunday at the launch site in the southern island province of Hainan. The rocket, along with the Wentian lab module already transported to the Wenchang Spacecraft Launch Site, will be assembled and tested at the launch site, announced the China Manned Space Agency. [emphasis mine]

In all past launches of the Long March-5B the core first stage has crashed to Earth in an uncontrolled manner because its engine could not be restarted after it shut down. The highlighted “Y3” added to the rocket’s name above suggests China might have fixed this. Previous Long March-5B rockets used YF-77 engines. Adding Y3 to the name — which generally follows China’s system for naming its engines — could mean they will now be able to control the core stage’s de-orbit. This speculation is further strengthened by a previous report that China was testing a new engine for the core stage that implied it was restartable.

If so, China will avoid the kind of bad press it received with previous Long March 5B launches. It will also put it back in compliance with the Outer Space Treaty, which it violated with each past core stage crash.

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Chinese expert calls for China to find ways to destroy Starlink constellation

11:27 am

A Chinese communications expert at its Beijing Institute of Tracking and Telecommunications has written a paper calling for China’s military to develop ways in which it can to destroy SpaceX’s Starlink constellation.

According to the South China Morning Post, lead author Ren Yuanzhen and colleagues advocated in Modern Defence Technology not only for China to develop anti-satellite capabilities, but also to have a surveillance system that could monitor and track all satellites in Starlink’s constellation.

“A combination of soft and hard kill methods should be adopted to make some Starlink satellites lose their functions and destroy the constellation’s operating system,” the Chinese boffins reportedly said, estimating that data transmission speeds of stealth fighter jets and US military drones could increase by a factor of 100 through a Musk machine connection.

I am sure China (as well as every other superpower — including the U.S. military) is already working on developing methods for either jamming or destroying Starlink. Doing either however is difficult because of the constellation’s nature: many small satellites all of which provide redundancy and are easily replaced. Even more depressing for these power-hungry government entities is the fact that Starlink is not the only constellation now in orbit, with many others soon to follow.

For example, consider the contracts that the NRO announced today with three different surveillance satellite companies, all of which have their own constellations. Getting rid of one is hard. All three is likely impossible.

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Chinese scientists plant seeds bred on Tiangong space station

9:45 am

The new colonial movement: Chinese scientists have now planted on Earth some of the 12,000 seeds that were bred on China’s Tiangong space station for six months and brought back to Earth in April.

The seeds, including alfalfa, oats and fungi, were selected by multiple research institutions last year. They were brought back to Earth by the Shenzhou-13 on April 16. Space breeding refers to the process of exposing seeds to cosmic radiation and microgravity during a spaceflight mission to mutate seed genes and then send them back to Earth to generate new species.

The goal is to see which seeds survive best in the harsh environment of space, which would thus make them better candidates for transport to other planets for planting.

While some of the results of this research will be published, much will not. China tends to keep what it learns close to the vest.

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Zhurong goes into hibernation

9:30 am

Overview map

According to a report today in China’s state-run press, the team running its Zhurong Mars rover have placed it into a hibernation mode in order to sit out the Martian winter.

To tackle the dust storms and low-temperature challenges, the Chinese rover went into dormancy on Wednesday. It is expected to wake up and resume work in December when the dust clears and Mars enters its spring season, the administration said in a statement.

The rover sits somewhere in the blue circle in the map to the right, created using elevation data and images from Mars Reconnaissance Orbiter (MRO). This region is about 25 degrees north latitude, so though it is in the dry equatorial regions of Mars, it still gets very cold in winter, down to -180 degrees Fahrenheit at night. Furthermore, the increased winter dust storms block the light from the Sun, which reduces the available power the rover’s solar panels can produce.

Chinese engineers have apparently adapted the hibernation techniques they use on the Moon with their Yutu-2 rover to place Zhurong in hibernation.

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More Chinese space junk crashes in India

9:52 am

It appears that debris from an upper stage of a Chinese Long March 3B rocket, launched in September ’21, fell in India on May 12, 2022.

Local media reported that the objects crashed with “loud thuds that shook the ground” in Gujarat. There were no casualties or property damage, according to The Indian Express. The crashed objects were all discovered within a 15-kilometer radius, and among them was a black metal ball weighing around five kilograms, the newspaper said.

Though the sources objects have not been identified with certainty, they look like inner tanks from a rocket, and the only object that reentered the atmosphere on this date and also had an orbit that crossed this part of India was the Long March 3B.

This is second time in less than a month that debris from an abandoned Chinese upper stage has crashed in India. Both are thought to have come from Long March 3Bs. More important, both now prove that China has no protocols when it launches these rockets to de-orbit the upper stages in a controlled manner.

Stay tuned for more Chinese space junk heading your way. In the next seven months it will launch two Long March 5B rockets, the large core stage of which reaches orbit. In all of the previous 5B launches, that stage — big enough to hit the Earth — then quickly fell back in an uncontrolled and unpredictable manner. Fortunately, each time it crashed in the ocean, though the May 2020 deorbit ended up with some debris landing near villages in Africa.

Recent tests of the 5B’s core stage’s engine have suggested that China might have redesigned it to allow it to be restarted, which would allow them to control its deorbit. This fact however has not been confirmed.

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Chinese pseudo company Ispace experiences another launch failure

9:11 am

The Chinese pseudo company Ispace today had another launch failure of its Hyperbola rocket, the third in four launch attempts.

It appears the cause was a failure of the rocket’s second stage to ignite after stage separation.

Ispace’s first launch of Hyperbola 2019 successfully reached orbit, making it the first and still only Chinese pseudo-company to reach orbit. Since then however the rocket has failed three consecutive times, each for what appears to be different reasons.

The rocket itself has four-stages, all using solid fuel motors, which means the rocket is derived from military missile technology. This also illustrates why Ispace is a pseudo company. It might be financed by private capital, and be attempting to make profits on commercial and government contracts, but everything about it only exists because it has government permission and supervision.

Furthermore, while it is entirely possible for a startup to survive such a string of failures, the possibility is small. In most cases a purely private company would lose customers and investment capital. Ispace’s survival up to now suggests the Chinese government wants it to succeed, and in that sense is acting as its owner.

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China launches Tianzhou freighter to space station

3:50 pm

The new colonial movement: China today successfully used its Long March 7 rocket to launch a new Tianzhou unmanned cargo freighter to its Tiangong space station.

The cargo is for the station’s next crew, scheduled to launch in June for a six month mission, during which two new large modules will be added to the station.

The launch took place at China’s sea coast Wenchang spaceport, so its expendable lower stages all fell harmlessly in the ocean.

The leaders in the 2022 launch race:

18 SpaceX
15 China
6 Russia
3 Rocket Lab
2 ULA

U.S. private enterprise still leads China 26 to 15 in the national rankings, as well as the entire world combined 26 to 24.

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China releases to the public some of the datasets from the Chang’e-5 lunar mission

10:44 am

China announced today that it has made available to the public the data from some of the instruments that flew on its November 2020 Chang’e-5 sample return lunar mission.

The instruments involved were the mission’s landing camera, panoramic camera, lunar mineralogical spectrometer, and regolith penetrating radar.

The data is supposedly available here, but you have to be able to read Chinese to find it.

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Chinese pseudo company Linkspace to try suborbital vertical rocket test this year

10:39 am

The Chinese pseudo-company Linkspace announced in a press release May 5th that it will attempt to vertically launch and land a first stage booster to suborbital space before the end of the year.

The rocket will later be transported to Lenghu in the northwestern Chinese province of Qinghai, the site of LinkSpace’s earlier tests. The team aims to launch the 47.5-foot-tall (14.5 meters) RLV-T6 to an altitude of around 62 miles (100 kilometers) and land it safely using landing legs and grid fins, similar to the way that the first stage of SpaceX’s Falcon 9 rocket touches down.

The rocket to be tested is almost exactly the same height as SpaceX’s Falcon 9 first stage, so apparently this test will be a test of a full scale prototype of Linkspace’s own first stage. If successful, the company will be able to soon followup with reusable launches.

Linkspace had performed small scale vertical rocket tests three years ago, and then disappeared for unknown reasons. Its reappearance now suggests the Chinese government has approved its effort and will thus allow it to go forward.

Note: I call all the so-called private companies coming out of China “pseudo” because none function like an independent company privately owned. They might raise Chinese investment capital and work to earn profit, but anything they design or build is closely determined by the communist Chinese government. None builds anything without that supervision, and should the government change its mind the company will quickly be shut down.

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Lunar samples from Chang’e-5 confirm fuel and oxygen can be mined from surface

10:50 am

Chinese scientists studying the lunar samples returned by Chang’e-5 probe have confirmed earlier studies of Apollo lunar samples that it is possible to extract oxygen and fuel from the Moon’s soil.

After analyzing the Chang’e-5 lunar soil, the team found the sample contains iron-rich and titanium-rich substances, which could work as a catalyst to make oxygen using sunlight and carbon dioxide.

The team proposed a strategy using lunar soil to electrolyze water from the moon and the astronauts’ life support system into oxygen and hydrogen. The process is powered by sunlight. The carbon dioxide exhaled by moon inhabitants can be collected and combined with hydrogen to yield the fuel methane, also catalyzed by lunar soil, according to the study. With this method, no external energy apart from sunlight would be used to produce oxygen and fuel to support life on a moon base, said the researchers.

What is new about these results are the proposed techniques and components used to make the process practical. The science team is now proposing testing it on future Chinese Moon missions

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China’s Long March 2D rocket launches 8 satellites

9:43 am

China today used its Long March 2D rocket to place eight Earth observation satellites into orbit as part of a larger constellation.

The Jilin-1 constellation, now consisting of 50 Earth observation satellites since its first launch in 2015, is China’s first-ever commercial remote-sensing satellite system. The system is operated by Chang Guang Satellite Technology Corporation, also known as Charming Globe, a commercial spinoff of the Changchun Institute of Optics, Fine Mechanics, and Physics in the northeast Chinese city of Changchun.

The constellation is planned to consist of 138 satellites by 2025, and the satellites will be orbiting at 535 km altitude above Earth. The constellation, featuring types of satellites with different capabilities, will ultimately be capable of revisiting any point on Earth every ten minutes, with an interim thirty-minute capability being achieved with sixty satellites in orbit.

China claims the data from this constellation will be for commercial use. Don’t be surprised however if its primary customer turns out to be China’s military.

As the rocket launched from one of China’s interior spaceports, its first stage crash landed in China. No word on whether it used parachutes or grid fins to control that landing.

The leaders in the 2022 launch race:

17 SpaceX
14 China
6 Russia
3 Rocket Lab
2 ULA

The U.S. still leads China 25 to 14 in the national rankings, with the U.S. leading all other nations combined 25 to 23.

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Zhurong travels another 1,300 feet

9:35 am

Overview map

UPDATE: After emailing this post to Alfred McEwen of the Lunar & Planetary Laboratory in Arizona, he responded to correct an error in my image. The MRO photo was taken when Zhurong had already traveled about half the 1,300 feet listed in the Chinese article below, thus making my original circle about two times too large.

I have corrected its size. It now shows the correct maximum distance Zhurong could have driven since that MRO picture was taken on March 11th.

Original post:
——————–
According to a short report yesterday in China’s state-run press, Zhurong has traveled another 1,300 feet on Mars since it was photographed from orbit on March 11, 2022 by the high resolution camera on Mars Reconnaissance Orbiter (MRO).

The report provided no information at all about the rover’s path. The map to the right shows Zhurong’s position as of March 11th, with the blue circle marking the maximum distance it could have moved since then according to this report. Based on China’s earlier vague statements, it is likely the rover has moved to the south, though even that covers a lot of possibilities.

The report did say this however:

Mars is about to enter the winter season, during which night temperatures will drop below minus 100 degrees Celsius, with a high probability of sandstorms. Martian winters last an equivalent of six Earth months.

Because Zhurong uses solar panels, it relies on the Sun for power. With coming of winter and more sandstorms, it thus faces the risk of limited solar power. As its nominal mission was only supposed to last three months, not a Martian year of 24 months that includes a winter, it will be interesting to see if it can survive that season.

The story also added that Yutu-2 has now traveled about 3,875 feet on the Moon, but added nothing else.

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China and Russia each successfully complete launches

10:25 pm

Both China and Russia successfully completed launches in the past few hours.

First, shortly before midnight today (local time) Russia used its smaller version of its new Angara rocket to place a military satellite into orbit, launching this version of the rocket for the second time.

Next, using its solid rocket Long March 11, China on April 30th (local time) successfully launched five smallsats from an ocean platform in the East China Sea. This was the third launch from sea by the Long March 11.

The leaders in the 2022 launch race:

17 SpaceX
13 China
6 Russia
2 ULA
2 Rocket Lab

The U.S. still leads China 24 to 13 in the national rankings. The U.S. also still leads all other nations and companies combined, 24 to 22.

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China’s Long March 2C rocket launches two Earth observation satellites

9:54 am

China yesterday successfully launched two Earth observation satellites using its Long March 2C rocket.

Since these were launched from one of China’s interior spaceports, the rocket’s first stage fell somewhere in China. No word if it used parachutes or grid fins to control that landing. Also, weather yesterday forced the scrub of a launch of China’s Long March 11 solid rocket from a sea-based launch platform. That launch has been rescheduled for tomorrow.

The leaders in the 2022 launch race:

16 SpaceX
12 China
5 Russia
2 ULA
2 Rocket Lab.

The U.S. presently leads China 23 to 12 in the national rankings. Since there are two U.S. launches scheduled for later today, as well as a Russian and Chinese launch pending, these numbers will change in the next 24 hours.

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Rogozin: Expect delays for future Russian lunar probes

9:45 am

China/Russian Lunar base roadmap
The so-called Chinese-Russian partnership to explore
the Moon.

According to a statement by Dmitry Rogozin, head of Roscosmos, yesterday in the Russian state-run press, the launch of two unmanned probes to the Moon, Luna-26 and Luna-27, are likely to be postponed due to “the current circumstances.”

“As for the Luna-26 lunar orbiter and the Luna-27 heavy lander mission, possibly, it will be adjusted taking into account that in the current situation we will be spending the main financial and industrial resources on increasing the orbital group. Now it is more important,” the space chief emphasized.

The Roscosmos CEO also asked for understanding if the mission is postponed. “Science is very important but now we are talking about the viability of Russia’s orbital group, about bringing it to a new level, its work as a group of double and military designation. Yet we are not postponing the lunar missions for long,” he added.

Rogozin added that Luna-25, scheduled for launch this year, has not been postponed.

Apparently the more than $1 billion of income that Roscosmos has lost by its refusal to launch OneWeb’s satellites is forcing it to make choices. For the government, the priority has to be launching communications, weather, navigation, and military surveillance satellites. Being tight on cash, Rogozin thus has no recourse but to favor those launches over any purely science missions.

This decision also demonstrates that Russia’s so-called partnership with China to explore the Moon, as shown in the graphic to the right that was released by China and Russia in June 2021, is pure hogwash. as I noted then:

Of the three Russian missions, Luna 25 is scheduled to launch later this year, making it the first all-Russian-built planetary mission in years and the first back to the Moon since the 1970s. The other two Russian probes [Luna-26 and Luna-27] are supposedly under development, but based on Russia’s recent track record in the past two decades for promised space projects, we have no guarantee they will fly as scheduled, or even fly at all.

Rogozin also said yesterday that he plans further talks with China in May to further their partnership concerning lunar exploration and building a lunar base. Let me translate: “We need cash to launch anything, and hope the Chinese will provide some.”

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China plans a constellation of communications/GPS-type satellites around Moon

9:43 am

The new colonial movement: According to a statement by one Chinese official on April 24th, China now plans to launch a constellation of communications/GPS-type satellites that will orbit the Moon and provide support for its unmanned and manned missions to the surface.

China will take the lead in demonstrating a small, lunar relay communication and navigation system, Wu Yanhua, deputy director of the China National Space Administration (CNSA), told Chinese media on April 24. The first launch for the small constellation could take place in 2023 or 2024, according to Wu, who added that countries around the world are welcome to jointly build it.

That first launch will likely be a relay satellite to support the first unmanned landers/rovers targeting the lunar south pole. It will also likely be the first of several satellites designed to provide service long term for China’s planned manned lunar base, what it has dubbed the International Lunar Research Station (ILRS). Though announced as a project partnered with Russia, expect a large bulk of the work to be done by China.

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Pieces of old Long March 3B rocket fall in India

9:09 am

It appears that pieces of an old Long March 3B rocket, launched on February 4, 2021, have fallen in India earlier this month.

On April 2, locals of Sindewahi tehsil were shocked to see six metallic spheres, metal balls and a metallic ring falling from the sky. Similar objects fell from the sky simultaneously in parts of Maharashtra, Madhya Pradesh and Gujarat.

This is not an example of China dumping the expendable first stage of a rocket on the ground during launch. These pieces came from the rocket’s upper stage, which reached orbit in ’21 and only now fell to Earth when its orbit decayed. Usually, most of the upper stage of a rocket burns up upon re-entry. However, certain pieces, such as the inner helium tanks that keep the larger fuel and oxidizer tanks pressurized, are sometimes strong enough to survive re-entry. It is likely that these tanks are the metallic spheres.

To avoid this, the rocket’s upper stage engine needs to be fired one last time to aim the re-entry over the ocean. SpaceX does this routinely. It appears at least in this one case China did not.

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Astronauts return from Chinese station; China launches satellite

9:06 am

Late yesterday China’s Shenzhou descent capsule successfully brought home three astronauts from its Tiangong-3 space station after spending six months in space.return from Chinese station.

During their stay they completed two spacewalks and prepared the station for the arrival of two more large modules in the next six months.

China yesterday also used its Long March 4C rocket to launch a new radar satellite designed to observe the Earth’s atmosphere.

The leaders in the 2022 launch race:

13 SpaceX
11 China
5 Russia
2 ULA
2 Rocket Lab

The U.S. still leads China 20 to 11 in the national rankings. Note that at this moment the U.S. total is more than all other nations combined (19).

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China’s astronauts to return after six month mission

12:40 pm

The new colonial movement: The three astronauts who have been on China’s Tiangong space station are about to return to Earth after completing a record six month mission.

Airspace closure notices indicate that Shenzhou-13 will return to Earth between 9:35 and 10:05 p.m. Eastern April 15 (9:35-10:05 local time, April 16) following departure from Tianhe.

The Shenzhou return capsule is planned to set down in a designated landing zone near Dongfeng in the Gobi Desert, Inner Mongolia.

Previous landings occurred in the grasslands of Siziwang, Inner Mongolia. Factors for the change include increasing population density around Siziwang, and the need to optimize for astronaut recovery as the duration of China’s spaceflight missions increases.

I suspect the change in landing location to inside China is also for security reasons. Tensions created by the Ukraine War has probably made China’s leaders reluctant to have their astronauts land anywhere but in China itself.

The article also outlines the upcoming plans for the next crew to Tiangong, which will be on board during the arrival of the station’s next two large modules.

The three-person Shenzhou-14 crew will be aboard the Tianhe space module for the arrival of two new modules, named Wentian and Mengtian, which will complete the three-module, T-shaped Chinese space station, later in the year.

Both of these large modules will be launched by China’s Long March 5B rocket. The previous launches of this rocket resulted in the crash of an out-of-control core stage because once it reached orbit it could not restart its engines to control its de-orbit. Though there have been hints that China may have upgraded the core stage’s engines, we do not know yet for certain if that includes the ability to restart it. If not, China should once again be prepared for some bad press as it threatens populated areas worldwide with these stages.

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TASS: China has suspended science partnerships with Russia

9:59 am

According to Alexander Sergeev, President of the Russian Academy of Sciences, Chinese scientists have also suspended all cooperation with Russia’s Academy of Sciences, as have all western nations due to its invasion of the Ukraine.

“If we talk about the southern or eastern directions, unfortunately, I can say directly that our Chinese scientific colleagues have also pressed the pause [button], and over the past month we have not been able to enter into serious discussions, despite the fact that we had excellent cooperation along with regular communication,” Sergeev said.

It is impossible to say at this point whether the actions of these Chinese scientists to refuse cooperation with Russia is based on a decision of the Chinese government, or simply reflects the decision of the scientists themselves. I would suspect the former, but if so it is quite surprising, as China’s communist government has made no such announcement. It could also be that China has decided it does not want to appear a party to Russia’s invasion in any way, but also does not want to make that decision public. Thus, it might have told its scientists to pause all work, but do this quietly.

Let me add that this statement by Sergeev could also be simply disinformation, demanded on him by Putin’s government. While Russian scientists tend to deal straight with other scientists, the situation is unique. For example, Dmitry Rogozin today claimed in TASS that the private space company Axiom owes Russia about $25 million for the nearly year-long flight of Mark Vande Hei to ISS. The problem is that this is utterly wrong. Axiom had nothing to do with Vande Hei’s flight. He was a NASA astronaut. Rogozin’s statement however is aimed at the Russian public — which has limited resources to question his statements — and is designed to slander both NASA and the private companies that now compete with Roscosmos.

If Rogozin can so nonchalantly issue false statements like this for propaganda reasons, so can Sergeev.

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