Tag: spaceflight

Debris from Russian anti-sat test causing numerous near Starlink collisions

12:04 pm

According to an official of a company that helps track space junk, the scattered debris from the satellite destroyed by Russia in an anti-satellite test in 2021 has had numerous near collisions with multiple Starlink satellites.

In the Aug. 6 event, Oltrogge said there were more than 6,000 close approaches, defined as being within 10 kilometers, involving 841 Starlink satellites, about 30% of the constellation. It’s unclear how many, if any, of the satellites had to maneuver to avoid collisions.

This conjunction squall was exacerbated by a new group of Starlink satellites. SpaceX launched the first set of “Group 3” Starlink satellites July 10 from Vandenberg Space Force Base into polar orbit, followed by a second set July 22. A third batch of Group 3 satellites is scheduled to launch Aug. 12.

The problem is only going to get worse, as this junk will be in orbit for quite some time.

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Northrop Grumman partners with Firefly to make Antares entirely U.S. made

9:00 am

Capitalism in space: Because the Russian invasion of the Ukraine, Northrop Grumman yesterday announced that it has signed a deal with the rocket startup Firefly to replace the Russian engines and Ukrainian-built first stages on its Antares rocket.

Firefly’s propulsion technology utilizes the same propellants as the current Antares rocket, which minimizes launch site upgrades. The Antares 330 will utilize seven of Firefly’s Miranda engines and leverage its composites technology for the first stage structures and tanks, while Northrop Grumman provides its proven avionics and software, upper-stage structures and Castor 30XL motor, as well as proven vehicle integration and launch pad operations. This new stage will also significantly increase Antares mass to orbit capability.

The press release made no mention of launch dates. However, according to Reuters Northrop Grumman has purchased three SpaceX Falcon 9 launches in ’23 and ’24 to get its Cygnus cargo freighter into orbit in the interim and thus fulfill its ISS resupply contract with NASA.

After an earlier Antares failure the company (then Orbital ATK) had hired ULA’s Atlas-5 to launch Cygnus. ULA however is retiring the Atlas-5 after it completes its present full manifest, so this rocket was no longer available. ULA is replacing it with the Vulcan rocket, but that rocket is not yet operational due to delays in the delivery of its Blue Origin first stage engines. Thus, SpaceX was Northrop Grumman’s only viable option.

There is also a certain irony in the hiring of Firefly to replace the Ukrainian first stage. Firefly was saved from bankruptcy by a Ukrainian billionaire, Max Polykov. Though he has been forced to sell off his ownership in the company by the State Department, Firefly would not now exist to take this business from a Ukrainian company had Polykov not provided his financial help.

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Russia and China complete launches

8:45 am

Both Russia and a pseudo-commercial Chinese company today completed launches.

Russia used its Soyuz-2 rocket to launch a military reconnaissance satellite for Iran, along with 16 Russian smallsats. The rocket was originally going to launch a South Korean satellite, but that launch was cancelled due to Russia’s invasion of the Ukraine.

In China, the pseudo-company Galactic Energy used its four-stage Ceres-1 rocket to place three Earth observations satellites into orbit. Because three of the rocket’s four stages use solid rocket motors, they were likely reworked from military applications. Thus, Galactic Energy does nothing without the full approval and supervision of the Chinese government. It might have been funded privately, and focused on making profits, but it really owns nothing it builds.

Nonetheless, this was its third successful orbital launch, making it the most successful of these Chinese pseudo-companies. It is also developing a Falcon 9 clone rocket dubbed Pallas-1, which it hopes to launch next year.

The leaders in the 2022 launch race:

34 SpaceX
29 China
11 Russia
6 Rocket Lab
5 ULA

American private enterprise still leads China 49 to 29 in the national rankings, and the entire world combined 49 to 47. A SpaceX Falcon 9 launch later today should strengthen this lead again.

The leade

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Sri Lanka blocks docking of Chinese spy ship as requested by India

11:47 am

The new Sri Lankan government, at the request of India, has rescinded the permission granted by the previous government that would have allowed a Chinese satellite tracking ship to dock at one of its ports.

In a written request, the Sri Lanka Foreign Ministry told the Chinese Embassy in Colombo not to go ahead with the visit, said an official involved in the process. “The Ministry wishes to request that the arrival date of the vessel Yuan Wang 5 in Hambantota to be deferred until further consultations are made on this matter,” the request says.

Sri Lankan President Ranil Wickremesinghe assured political leaders on Friday that the visit will not go ahead as planned.

The previous government, recently overthrown by a citizen revolt because of its green policies that produced starvation and bankruptcy throughout the nation, had agreed to the docking, changing years of cooperation with India. Apparently the new government has decided to renew that Indian alliance.

India in turn wishes to limit China’s ability to spy on its own satellites and operations in space.

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Mapping the break-up and impact of one of the first asteroid’s tracked from space to the ground

11:33 am

Computer simulation of asteroid break-up
Click for full figure.

By analyzing 600 scattered pieces recovered from a 20-foot wide asteroid that broke-up and landed in the Sudan in 2008, scientists have discovered that some surface pieces were able to reach the ground unscathed because they were on the asteroid’s protected aft as it plowed through the atmosphere.

This asteroid was one of the first ever discovered shortly before impact and then tracked as it hit the atmosphere and broke up, the pieces falling as meteorites. The image to the right, figure 4 of the paper, shows the computer simulation of the asteroid’s break-up, based on the data obtained by mapping the location of its pieces on the ground. From the press release:

“Because of the high speed coming in, we found that the asteroid punched a near vacuum wake in the atmosphere,” says Robertson. “The first fragments came from the sides of the asteroid and tended to move into that wake, where they mixed and fell to the ground with low relative speeds.”

While falling to the ground, the smallest meteorites were soon stopped by friction with the atmosphere, falling close to the breakup point, while larger meteorites were harder to stop and fell further downrange. As a result, most recovered meteorites were found along a narrow 1-km wide strip in the asteroid’s path. “The asteroid melted more and more at the front until the surviving part at the back and bottom-back of the asteroid reached a point where it suddenly collapsed and broke into many pieces,” said Robertson. “The bottom-back surviving as long as it did was because of the shape of the asteroid.”

No longer trapped by the shock from the asteroid itself, the shocks from the individual pieces now repulsed them, sending these final fragments flying outwards with much higher relative speed. “The largest meteorites from 2008 TC3 were spread wider than the small ones, which means that they originated from this final collapse,” said Jenniskens. “Based on where they were found, we concluded that these pieces stayed relatively large all the way to the ground.”

The location of the large meteorites on the ground still reflects their location in the back and bottom-back part of the original asteroid.

While there is a certain randomness in how any asteroid breaks up, this data will help scientists better understand the make-up of future meteorites they find. The bigger more widely scattered pieces likely came from the asteroid’s rear surface.

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Further damage to Curiosity’s wheels

10:14 am

Curiosity wheel comparison of damage
For the original images, click here for the top photo and here and here
for the bottom photo.

The photo comparison to the right, created from high resolution images taken by Curiosity on Mars two months apart, provides us a new update on the state of the rover’s damaged wheels. It shows damage on the same wheel that I have been tracking for several years.

The numbers indicate the same treads, or grousers as termed by the science team. The “+” sign indicates spots where new damage has occurred since the previous photo.

The top photo was taken on June 3, 2022, and was the first to show new damage in more than five years. The bottom photo was taken on August 6, 2022, and shows that another small piece on the same grouser has broken off during the past two months.

Other than this change, however, the rest of the grousers appear unchanged. Moreover, a comparison with an earlier image of this same wheel taken in the summer of 2021 shows that grouser #6 as well as the unnumbered one just below appear also unchanged.

The damage in grouser #5 however is still concerning, and reflects the increasing roughness of the terrain as Curiosity climbs higher and higher on Mount Sharp. Though the science team has been very careful since the rover’s first few years on Mars to travel around obstacles that could damage the wheels, it apparently is becoming harder to do so.

However, even if this wheel eventually loses all the metal between the zig-zag grouser treads, the science team has said it has “proven through ground testing that we can safely drive on the wheel rims if necessary.” The team as also said they do not think that is likely, at least not for a long time, and based on the rate of damage documented by these pictures, this appears very true.

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India’s new SSLV rocket fails on first launch attempt

10:53 am

Delayed years because of India’s panic over the Wuhan flu, the first launch of that country’s new Small Satellite Launch Vehicle (SSLV) failed today when the rocket’s fourth stage apparently did not fire its engines properly.

The problem appeared to be the SSLV’s terminal stage, called the velocity trimming module (VTM). According to the launch profile, the VTM was supposed to have burnt for 20 seconds at 653 seconds after launch. However, it burnt for only 0.1 seconds, denying the rocket of the requisite altitude boost. Two satellites onboard the rocket – the primary EOS-2 Earth-observing satellite and the secondary AzaadiSAT student satellite – separated from the vehicle after the VTM burnt.

As a result, the two satellites were put in an orbit that was too low, which quickly decayed, destroying both.

Since this launch failed, I do not count it in the launch totals for 2022.

Considering that this was SSLV’s first launch, it was in that sense a test, and a failure therefore is not unexpected. India’s real problem is that the launch was delayed so long because of the Wuhan panic, thus allowing other competitors to catch up and pass India. While it is certain ISRO will try again, and eventually succeed, it will not get the market share it would have had, had it launched in 2020 as originally planned.

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SpaceX raises another $250 million in investment capital

8:58 am

Capitalism in space: SpaceX in July raised $250 million in investment capital from five unnamed investors, bringing the total raised in 2022 to $2 billion.

Added to the amount brought in before this year, SpaceX has raised about $9 billion in private capital, most of which is focused on financing the development of Starship/Superheavy. When you add the $2.9 billion contract it won from NASA to develop Starship as a manned lunar lander, the company has raised about $12 billion to build this heavy lift rocket.

The numbers demonstrate several things. First, Wall Street is apparently very confident SpaceX will succeed in building the rocket, and then make a lot of money from it. Second, the numbers prove it shouldn’t cost $60 billion and two decades to design and build a heavy lift rocket, as NASA has done with its SLS rocket. SpaceX is doing it for less than a fifth of the cost, in a third of the time.

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Strange terrain southwest of Jezero Crater

1:17 pm

Strange terrain near Jezero Crater

Cool image time! The photo to the right, cropped and reduced to post here, was taken on June 16, 2022 by the high resolution camera on Mars Reconnaissance Orbiter (MRO). It shows what the scientists have merely label “landforms.”

I instead call them strange. Clearly we are seeing exposed layering that surrounds the mesa in the middle of the image. This in turn suggests that the mesa top was once the surface of this whole region, and that region had been formed by the repeated placement of multiple sedimentary layers. Then, over time the surrounding terrain was eroded away, exposing those underlying layers.

Even so, some of the parallel lines do not appear to be layers, but striations etched into the ground. To get a better look, the white box marks the area covered by a full resolution close-up below.
» Read more

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Curiosity celebrates ten years on Mars

9:31 am

Curiosity's location in Gale Crater

Sometime today the rover Curiosity will celebrate its tenth anniversary on Mars. The oblique graphic of Gale Crater above, first released by the science team shortly before landing in 2012, has been further annotated with a red line to show the rover’s journey since then. As noted by Scott VanBommel, Planetary Scientist at Washington University, today on the science team’s blog:

As we the science and engineering teams have aged this last decade, so has Curiosity. The toll of ten years and nearly 28.5 km [17.7 miles] of Mars driving shows with every MAHLI wheel imaging activity, with less energy available for a plan, and with aging mechanisms. This is the life of a Mars rover. Spirit and Opportunity were no different, yet they persisted and paved the way scientifically and technologically for the rovers of today. Curiosity has made numerous scientific discoveries during these ten years, emphasized by the over 500 science team publications, with many more ahead as we continue our ascent and exploration of Gale crater and Mount Sharp.

I look forward to the next ten years.

Despite that aging, Curiosity’s general condition appears quite excellent, with its wheels the greatest concern but generally holding up. Based on the last ten years, the rover is likely to remain operational for at least ten more years, if not longer.

In the more immediate future, the rover is only days away from getting its first good look down into Gediz Valles, that canyon on the graphic above that it has been traveling towards since day one.

A good review of five of Curiosity’s biggest discoveries using its sample analysis instrument can be found here.

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Virgin Galactic once again delays commercial suborbital operations

9:08 am

Capitalism in space: In releasing its quarterly report, Virgin Galactic yesterday revealed that it is once again delaying the start of commercial suborbital operations, pushing back from the first quarter of 2023 to the second quarter.

In an earnings call, company executives said that the latest delay was not directly related to supply chain and staffing problems it blamed for the previous delay. Instead, refurbishment work on its WhiteKnightTwo plane, VMS Eve, was taking longer than planned. “The driver is around the amount of time it is taking us to accomplish the work scope on Eve,” said Michael Colglazier, chief executive of Virgin Galactic. “We did not plan the full amount of time that’s been needed to get this work accomplished.”

Company officials also said they are shifting its customer emphasis, now focusing much more on “private and government researchers.” Let me translate: The public is not buying tickets, so Virgin Galactic hopes to convince the government to keep it afloat instead.

I predict this company will likely never fly any customers, and it appears the stock agrees, with the stock plunging in value, from $8.25 to $6.95 in less than a day.

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Astra cancels all launches with its Rocket 3.3 rocket

9:01 am

Capitalism in space: Astra yesterday announced that it has canceled all further launches with its Rocket-3.3 rocket, and will instead focus on developing a larger version, dubbed Rocket-4, which it says will begin test flights in 2023.

The company says that it will no longer fly the Rocket 3.3 and move on to its larger Rocket 4 vehicle that it announced in May. One change is that the payload performance of the new rocket has doubled to 600 kilograms. Kemp didn’t disclose details of the design change other than an upgrade to its upper stage engine. Rocket 3.3, by contrast, had a payload capacity of no more than 50 kilograms.

“The feedback that we were getting from some of the larger constellation operators was that satellites were getting larger,” he said. Discontinuing the existing Rocket 3.3, he said, allowed the company to focus its resources on the new launch system, including increasing its payload capacity.

Essentially, Astra has left the field and is at present no longer an operational smallsat rocket company. It is also likely that its announced schedule for its upgraded rocket will not be met. Thus, expect customers to shift to other launch providers able to launch satellites, such as Rocket Lab and Virgin Orbit.

Not surprisingly, the company’s stock plunged soon after this announcement.

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SpaceX launches South Korea’s Danuri lunar orbiter

4:50 pm

SpaceX today successfully launched South Korea’s Danuri lunar orbiter, also called the Korea Pathfinder Lunar Orbiter.

The first stage completed its sixth flight, landing on a drone ship in the Atlantic. The fairings completed their fourth flight.

Danuri is now on its way to the Moon, with a planned arrival in lunar orbit on December 16, 2022. It carries six instruments, one of which was developed by NASA. The spacecraft, while designed to study the Moon, is primarily a technology test mission laying the groundwork for more sophisticated interplanetary South Korean missions. More information about the mission can be found here.

The leaders in the 2022 launch race:

34 SpaceX
28 China
10 Russia
6 Rocket Lab
5 ULA

The U.S. now leads China 49 to 28 in the national rankings, and the entire world combined 49 to 45. With this launch American private enterprise has now surpassed the entire launch total for all of 2021, and has the most launches for the U.S. since 1967, when it completed successfully 57 launches.

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China launches “reusable experimental spacecraft”

4:02 pm

According to the official Chinese press, China today successfully used its Long March 2F rocket to place into orbit a “reusable experimental spacecraft.”

To say the information provided was terse is to be extravagant. This is it:

After a period of in-orbit operation, the spacecraft will return to its scheduled landing site in China. It will test reusable technologies and in-orbit service technologies as planned during its flight, providing technological support for the peaceful use of space.

It appears, based on the size of the rocket, that this spacecraft is likely a copy of Boeing’s X-37B.

The leaders in the 2022 launch race:

33 SpaceX
28 China
10 Russia
6 Rocket Lab
5 ULA

The U.S. still leads China 48 to 28 in the national rankings, and the entire world combined 48 to 45.

These numbers should change within the next half hour, as SpaceX is about to launch another rocket.

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Glacial flows pushing out through a Martian crater rim

12:51 pm

Wider view of 6-mile-wide crater
Click for full image.

Today’s cool image once again illustrates how Mars is far from a waterless planet. Instead, there is strong evidence that water ice can be found across most of the Red Planet’s surface, excluding the equatorial regions lower than 30 degrees latitude.

The photo to the right was taken on September 11, 2021 by the wide view context camera on Mars Reconnaissance Orbiter (MRO). It shows a 6-mile-wide unnamed crater on Mars, located at 35 degrees south latitude, with what appears to be a glacier in its interior, flowing to the southwest towards several breaches in the crater’s southwest rim. Several of those breaches now sit higher than the flow, suggesting that the glacier itself was once higher and flowed out of those gaps. Now the level has dropped, and the only place the glacier exits the crater is the central gap at the center of the white rectangle.

That white rectangle marks the area covered by a recent MRO high resolution image, taken on March 29, 2022 and cropped and reduced to post below.
» Read more

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Axiom signs deal with New Zealand

9:52 am

Capitalism in space: The private space station company Axiom has now signed a deal with New Zealand to permit its citizens to propose and fly experiments on future Axiom missions, both to ISS and to Axiom’s own space station, scheduled for launch beginning in ’24.

This is the fourth international commercial agreement Axiom has signed since May, with Italy, Hungary, and the UAE the signatories in the previous deals. The UAE deal also included the launch of a UAE astronaut to ISS for a six month flight.

Axiom hopes to launch its first module to ISS in ’24, with later modules eventually allowing it to undock its section to fly as an independent station when ISS is retired.

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Environmentalists opposed to Starship at Boca Chica appeal dismissal of their lawsuit

9:45 am

Environmentalists from the Sierra Club and one Texas Indian tribe have now appealed the dismissal of their lawsuit aimed at blocking further tests or launches of Starship and Superheavy by SpaceX at its Boca Chica facility.

The Sierra Club and the Carrizo/Comecrudo Tribe of South Texas jointly appealed the 445th District Court’s decision July 7 to dismiss a lawsuit concerning SpaceX testing of its next-generation Starship vehicle closing nearby Boca Chica Beach, the coalition said July 28. In the dismissal, Judge Gloria Rincones argued there is “no private right of enforcement” concerning the beach access, according to KRGV.com (opens in new tab). The dismissal took place over the appellants’ protests that closing the beach violates the Texas state constitution, along with access rights by traditional groups.

The Sierra Club’s Brownsville organizer, Emma Guevara, stated the appeal is taking place because the beach is closed weekly to allow “a billionaire [to] launch deadly rockets near homes and wildlife.”

Citing a fireball that briefly and unexpectedly engulfed Starship during testing July 12, Guevera said her family was “forced” to hear the noise, which “launched without any warning for the public.” [emphasis mine]

My my, what a horror! I suppose everyone must stop what they are doing because Guevera and his family might be inconvenienced. And who cares if the lawsuit prevents thousands of south Texas citizens from having jobs and a thriving economy? It is more important Guevera doesn’t have to hear loud noises.

The lawsuit claims that allowing SpaceX to periodically close access to the nearest beach violates the state’s constitution, despite laws passed by both the local and state legislatures allowing for these closures.

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Next private SpaceX manned targeting December launch

9:31 am

Capitalism in space: SpaceX is now planning to launch in December the next private manned Dragon orbital mission, dubbed Polaris Dawn, and led by billionaire Jared Isaacman, who led the previous private Inspiration4 mission in September 2021.

Polaris Dawn is the first of three separate crewed launches, all of them funded by Isaacman. This first effort will see Isaacman flying a SpaceX Dragon spacecraft alongside Sarah Gillis, Anna Menon and Scott Poteet. (Both Gillis and Menon work at SpaceX.) The second launch aims to use a Dragon while the third is scheduled as the first crewed mission for Starship, SpaceX’s next-generation spacecraft.

…Among the mission’s aims is the first spacewalk, or extravehicular activity (EVA), of a private astronaut. The crew will use SpaceX-developed EVA suits for the effort. Crew Dragon will be depressurized for the spacewalk in a similar way that NASA’s Gemini capsules were in the 1960s, requiring all crew members to wear suits designed for a vacuum environment.

By not flying to ISS, Isaacman and SpaceX avoid the high fees NASA charges as well as its extensive requirements.

By remaining in orbit however the length of the mission will be limited to only a few days, rather than weeks. Thus, it underlines the growing need for private commercial space stations, not controlled by the government.

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Lucy science team ends attempt to deploy solar array

9:12 am

Lucy's planned journey
Lucy’s planned mission, the yellow dot indicating approximately
its present position. Click for full image.

The Lucy science team has decided to end further attempts to fully deploy one of the spacecraft’s two solar arrays, leaving it just short of fully deployed.

On seven occasions in May and June, the team commanded the spacecraft to simultaneously run the primary and backup solar array deployment motors. The effort succeeded, pulling in the lanyard, and further opening and tensioning the array.

The mission now estimates that Lucy’s solar array is between 353 degrees and 357 degrees open (out of 360 total degrees for a fully deployed array). While the array is not fully latched, it is under substantially more tension, making it stable enough for the spacecraft to operate as needed for mission operations.

The press release announcing this decision is horribly written. First, it buries this decision to the release’s last three paragraphs so that it can rave about the brilliance of Lucy’s engineers and scientists in solving the overall problem. Second, it never actually states that this is the decision that has been made. It implies it.

Regardless, it appears the engineers are satisfied that the almost fully deployed array will hold its position for the rest of the mission. They have decided that the risk of trying to fully deploy it is greater than the risk of having it slightly open.

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ULA launches Space Force reconnaissance satellite

8:57 am

Capitalism in space: ULA’s Atlas-5 rocket early today successfully placed a Space Force reconnaissance satellite into orbit, designed to detect the heat signatures of incoming missiles.

At this moment ULA has only 21 Atlas-5 rockets in its inventory, after which the rocket will be fully replaced with the not-yet launched Vulcan.

The leaders in the 2022 launch race:

33 SpaceX
27 China
10 Russia
6 Rocket Lab
5 ULA

American private enterprise now leads China 48 to 27 in the national rankings, and the entire world combined 48 to 44.

The American total of 48 matches the total launches all last year.

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China launches three satellites with Long March 4B rocket

11:41 pm

China early on August 4, 2022 (China time) successfully placed three satellites in orbit, including a climate satellite it claims will do “carbon monitoring, survey and monitoring of terrestrial ecology and resource, major national ecological projects monitoring and evaluation.” No information at all was released about the other two satellites, both of which were probably cubesats.

This launch actually occurred prior to the Electron launch from Rocket Lab.

The leaders in the 2022 launch race:

33 SpaceX
27 China
10 Russia
6 Rocket Lab
4 ULA

American private enterprise still leads China 47 to 27 in the national rankings, and the entire world combined 47 to 43.

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Rocket Lab launches second NRO surveillance smallsat in three weeks

10:14 pm

Capitalism in space: Rocket Lab today successfully used its Electron rocket to place its second National Reconnaissance Office (NRO) surveillance smallsat into orbit in just over three weeks.

For Rocket Lab, this was the sixth launch in 2022, which matches its previous annual high, achieved in both 2019 and 2020. It should easily top that record before the year is out.

The leaders in the 2022 launch race:

33 SpaceX
26 China
10 Russia
6 Rocket Lab
4 ULA

American private enterprise now leads China 47 to 26 in the national rankings, and the entire world combined 47 to 42.

Two more American launches are scheduled in the next day. If both are successful, the U.S. will have exceeded its entire launch total for 2021 (48) in only a little more than a half year, and completed the most successful launches since 1967.

The second half of the year should actually be as active as the first half, with three more American smallsat rocket companies (Firefly, Relativity, and ABL) pushing hard for their first successful launches before the year is out, thus joining the already operational smallsat rocket companies Rocket Lab, Virgin Orbit, and Astra.

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Today’s quick space links

2:12 pm

Some quick links, provided by Jay:

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NASA imposes new rules for any private launches to ISS

11:08 am

NASA has added several new rules for any private launches to ISS, now requiring that each flight include at least one experienced former NASA astronaut.

From the actual procurement notice:

NASA is also in the process of finalizing details associated with a new requirement that upcoming private astronaut missions include a former flown NASA (U.S.) government astronaut as the mission commander. A former NASA astronaut provides experienced guidance for the private astronauts during pre-flight preparation through mission execution. Based on their past on-orbit and NASA experience, the PAM commander provides a link between the resident ISS expedition crew and the private astronauts and reduces risk to ISS operations and PAM/ISS safety. Specific details of the requirement will be documented in future solicitations, as well as in updated documentation and in the solicitation technical library.

The new rules also require the companies to submit their research plans twelve months before launch, as well as reserve a longer time for the private passengers to adapt to weightlessness on the station before initiating that work.

The changes appear to make sense, based on the experience of the first passenger flight of Axiom sent up to ISS earlier this year. However, their existence will likely encourage the arrival of the private space stations in order to break free from NASA’s rules.

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Momentus has now deployed seven of ten customer payloads from its Vigoride tug

10:59 am

Capitalism in space: Despite technical communications issues after deployment of the first test flight of its Vigoride orbital tug, Momentus yesterday announced that has now deployed seven of ten customer payloads.

This announcement is somewhat of a surprise, as in June the company had said it would not be able to deploy anymore payloads due to the communications and solar panel problems Vigoride was experiencing.

The update also noted that the company is incorporating changes in its next Vigoride tug, scheduled to launch in November.

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The scattered debris from Perseverance’s landing, now being tracked by the rover

10:51 am

Perseverance's parachute, as photographed by Ingenuity
Click for full image.

A piece of string on Mars
Click for full image.

The Perseverance science team today posted a detailed update on the various pieces of debris that both the rover and the Ingenuity helicopter have been tracking since both landed on Mars in February 2021.

Some of the EDL [entry, descent, landing] hardware broke into smaller pieces when it impacted the surface. These pieces of EDL debris have been spotted in images of the Hogwallow Flats region, a location roughly 2 km to the northwest of the EDL hardware crash zones. As of Sol 508 (July 24, 2022), the operations team has catalogued roughly half a dozen pieces of suspected EDL debris in this area. Some of these EDL debris are actively blowing around in the wind. So far, we’ve seen shiny pieces of thermal blanket material, Dacron netting material that is also used in thermal blankets, and a stringlike material that we conclude to be a likely piece of shredded Dacron netting.

To the right are two of the most interesting examples. The top image shows the parachute and associated equipment from the landing, taken by Ingenuity during a flight in April 2022. That image, when compared with an earlier picture taken from orbit, showed that the wind of Mars, though incredibly weak, had been able to shift the parachutes edges.

The second image shows the string that the rover photographed on July 12, 2022, and had blown away four days later when Perseverance re-photographed this site.

Today’s update notes that the area in the crater they have dubbed Hogwallow Flats “appears to be a natural collecting point for windblown EDL debris.” The flats are an area at the foot of the delta that flowed into Jezero Crater in the past, and is an area where Perseverance has been traveling most recently.

That the wind has been able to move small pieces so effectively is I think somewhat of a surprise. That it is gathering the material against the crater’s western cliffs suggests the prevailing winds here blow to the west.

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Australian Space Agency confirms debris is from SpaceX Dragon capsule

10:28 am

Officials from the Australian Space Agency have inspected and confirmed that the debris that landed recently in the southeast Australia came from service module/trunk of a SpaceX Dragon capsule.

The agency had been alerted by Brad Tucker, an astrophysicist from the Australian National University, who first realised the timing and location of the debris falling coincided with a SpaceX spacecraft which re-entered the Earth’s atmosphere at 7am on 9 July, 20 months after its launch in November 2020.

Tucker believes the debris came from the unpressurised trunk of the SpaceX capsule, which is critical to take off but dumped when returning to earth.

This capsule was Resilience, launched on November 15, 2020 on SpaceX’s second manned launch for NASA. The capsule and crew returned in April, 2021. The service module apparently remained in orbit until July 2022, when its orbit decayed.

This service module was considered small enough it would burn up in the atmosphere. That assumption was apparently wrong. Though the pieces caused no damage, SpaceX needs to revise its operations to make sure future service modules will come back over the ocean, just in case sections reach the surface.

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Today’s Twitter links

11:07 am

Today I am beginning a new mid-day feature on Behind the Black, thanks to the effort of reader Jay, who has recently been acting as a stringer by sending me new stories he finds on Twitter. I don’t do Twitter, so his help has been very much appreciated.

Most of these Twitter stories however do not merit a full post. Most are usually just interesting images, or PR updates from companies and space agencies announcing future events. Up to now I check them out, and then file them away. I decided we might as well post them each day, all at once, in a single post. Jay has agreed to gladly help make this happen.

So, let’s begin:

It is unknown how much information China will release much about this launch. Stay tuned.

I will only believe Blue Origin has delivered a flightworthy engine to ULA when ULA actually begins installing that engine on a Vulcan rocket. Until then, I view everything Blue Origin posts on Twitter on this subject to be nothing more than empty air.

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Curiosity heads into the pass

10:16 am

Mosaic by Curiosity
Click for full mosaic.

Overview map
Click for interactive map.

Cool image time! The mosaic above, cropped, reduced, and annotated to post here, was created from 31 navigation images taken by the Mars rover Curiosity, and shows the rover’s upcoming drive. From the science team’s July 29, 2022 update:

We are attempting to reach a high point, just at the top right edge of the image, so we can look down into the valley to see if there is a way out on the other side and to help plan our path forward. High tilts, sand, and large and small rocks clutter the terrain, requiring the Rover Planners to pick their way around while making sure they stay clear of the hazards.

After the drive, we took a lot of imaging from our new location, including a 360 degree Mastcam mosaic and an upper tier of imaging to catch the tall relief of the valley walls.

The green dot in the image above as well as the overview map to the right indicates the approximate location on the cliff face of a previously observed recurring slope lineae, streaks that appear to come and go seasonally whose origin is still not understood.

The blue dot on the map marks the rover’s position on August 1, 2022. The yellow lines indicate the approximate area covered by the mosaic above. The large red dots on the overview indicate the rover’s original planned route, with the smaller red dots indicating the hoped-for route to get back to that path.

In the far distance the upper slopes of Mount Sharp can faintly be seen through the winter dust haze. That mountain is about 18,000 feet high, though its actual peak is not yet visible. Curiosity is still about 16,000 feet below that peak. Kukenan is about 1,500 feet high. The cliff with the slope lineae is probably about 400-500 feet high The two side hills that delineate the pass ahead are probably no more than 200 feet high.

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