Category: Behind The Black

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

9:52 am

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

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

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

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

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

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The North Star has spots!

9:38 am

The spoted surface of Polaris
Click for original image.

Astronomers using an array of six ground-based telescopes have obtained best new data of Polaris, the North Star, including the first rough image of its surface, and discovered sunspots on its surface.

You can read the paper here [pdf]. The image to the right, taken from figure 4 of the paper, shows the surface as seen by the telescopes over two nights in April 2021. Polaris is what astronomers call a Cepheid variable star, which changes brightness on a very precise schedule as its diameter grows and shrinks. In the case of Polaris, that variation is four days long. The star’s brightness itself varies only slightly, and over the decades has even at times appeared to cease its variations.

As the true brightness of Cepheids is very predictable based on their pulse rate, these stars are one of the main tools astronomers use to determine distances to other galaxies. Knowing more about them thus has great importance to cosmological research.

The orbital motion showed that Polaris has a mass five times larger than that of the Sun. The images of Polaris showed that it has a diameter 46 times the size of the Sun.

The biggest surprise was the appearance of Polaris in close-up images. The CHARA observations provided the first glimpse of what the surface of a Cepheid variable looks like. “The CHARA images revealed large bright and dark spots on the surface of Polaris that changed over time,” said Gail Schaefer, director of the CHARA Array. The presence of spots and the rotation of the star might be linked to a 120-day variation in measured velocity.

The researchers plan to take regular images again of Polaris to better track the changes to its surface.

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NASA delays Starliner return decision to end of month

9:17 am

In a short FAQ posted by NASA today, the agency quietly revealed that the decision on whether to bring Starliner back with its astronauts on board has been delayed till the end of August.

NASA now plans to conduct two reviews – a Program Control Board and an Agency Flight Readiness Review – before deciding how it will safely return Wilmore and Williams from the station. NASA expects to decide on the path forward by the end of August.

It appears the agency has decided to bring more people into the decision-making process. In the briefing last week, it was then planning only one review, expected to be completed before the end of this week. It now sounds like a second review will occur after the first, pushing the decision back one more week.

All of NASA’s actions in the past three weeks have suggested an increasing involvement by upper management, possibly including White House officials. With an election coming up, the politicans who are supposed to be in charge have apparently inserted themselves into this process and are demanding greater review. I expect in the end the decision will fall to them, and might even be announced by NASA administrator Bill Nelson himself.

These actions have also suggested that upper management does not like the risks involved in returning the crew on Starliner. Politicians do not like to have bad things happen on their watch. We should therefore not be surprised if the decision is made to send Starliner home unmanned.

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Juice completes Earth fly-by, heads for Venus fly-by

9:07 am

Earth as seen by Juice
Earth as seen by Juice during fly-by.
Click for original image.

The European probe Juice yesterday successfully completed a close fly-by of the Earth and was thus successfully slingshoted on its way to its next fly-by, of Venus, on its way to Jupiter.

This fly-by was actually a double event. First Juice zipped past the Moon the day before, coming within 435 miles. Then, only one day later it passed the Earth at a distance of 4,230 miles, thus completing the first dual fly-by of the both the Earth and the Moon.

The flyby of the Moon increased Juice’s speed by 0.9 km/s relative to the Sun, guiding Juice towards Earth. The flyby of Earth reduced Juice’s speed by 4.8 km/s relative to the Sun, guiding Juice onto a new trajectory towards Venus. Overall, the lunar-Earth flyby deflected Juice by an angle of 100° compared to its pre-flyby path.

The inherently risky flyby required ultra-precise, real-time navigation, but is saving the mission around 100–150 kg of fuel. In the month before the flyby, spacecraft operators gave Juice slight nudges to put it on exactly the right approach trajectory. Then they tracked Juice 24/7 between 17–22 August.

The Venus fly-by will occur in August 2025, followed by additional Earth flys in September 2026 and January 2029. The spacecraft will finally arrive in Jupiter orbit in July 2031, where it is designed to study the large icy moons (Europa, Gandymede, and Calisto) of that gas giant.

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August 20, 2024 Quick space links

3:35 pm

Courtesy of BtB’s stringer Jay. This post is also an open thread. I welcome my readers to post any comments or additional links relating to any space issues, even if unrelated to the links below.

 

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What the heck caused these cones to align on Mars?

2:48 pm

Another
Click for original image.

Time for another “What the heck?” cool image! The picture to the right, cropped, reduced, and sharpened to post here, was taken on May 23, 2024 by the high resolution camera on Mars Reconnaissance Orbiter (MRO). It shows what the science team labels as “longitudinally aligned cones”.

To my eye the cones visibile in this picture seem more aligned latitudinally, to the east-west, instead of longitudinally, north-south, but the larger view in the inset on the overview map below shows that on a larger scale, the cones do appear aligned in a north-south direction.

Either way, this is one of those photos from Mars orbit that leaves me entirely baffled. The cones and the flow feature that cuts across the middle of the image might be either volcanic or glacial, but it is beyond my pay grade to explain what caused this patch of aligned cones.
» Read more

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Court: Cop who arrested an innocent citizen illegally has no immunity

2:06 pm

Still in effect
Still in effect

A federal three-judge panel has now ruled that a policeman who illegally arrested an innocent citizen simply because that person had a concealed carry permit cannot claim qualified immunity from suit or prosecution.

The actions of the policemen, Nicholas Andrzejewski, were incredibly inappropriate and abusive.

On November 12, 2018, Basel Soukaneh’s life was significantly disrupted. Soukaneh was looking for a house he was considering purchasing, but the GPS on his phone, held in a holder on the dash of his car, had frozen. He was unfamiliar with the area. Soukaneh pulled over to correct the problem, left the engine running, and had the interior lights on. A Waterbury police officer quickly knocked on his window and demanded to see his driver’s license. Soukaneh handed him the license and his legal concealed carry permit, then told the officer where his firearm was located in the vehicle.

The officer, Nicholas Andrzejewski, grabbed Soukaneh, dragged him from the car, and violently handcuffed him, causing significant pain. Andrzejewski then stuffed Soukaneh in the back of his police car and searched Soukaneh’s car, including the trunk. Several other officers came to the scene. One of them put Soukaneh in an upright, seated position instead of where Andrzejewski had stuffed him, with his head near the floor. After another half hour, he was released. It is not clear if he was charged with a traffic violation.

» Read more

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Juice completes fly-by of Moon

9:58 am

Juice's view of the Moon
Click for original image.

Europe’s Juice probe to Jupiter yesterday successfully completed its close fly-by of the Moon, shifting its path as it prepares for a close fly-by of the Earth today.

The picture to the right, cropped, reduced, and sharpened to post here, was taken during yesterday’s flyby. At its closest approach Juice was only 435 miles above the lunar surface. It will pass the Earth today at a distance of 4,230 miles.

If the Earth fly-by today is successful, Juice will then do flybys of Venus in August 2025, Earth in September 2026, and Earth again in January 2029, arriving in Jupiter orbit in July 2031, where it is designed to study the large icy moons (Europa, Gandymede, and Calisto) of that gas giant.

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SpaceX gets FCC okay for next Starship/Superheavy test flight

9:41 am

Superheavy being captured by the tower chopsticks at landing
Artist rendering of Superheavy being captured by
the tower chopsticks at landing. Click for video.

The FCC yesterday issued SpaceX a communications license for the fifth orbital test launch of its giant Starship/Superheavy rocket, with the license permitting Superheavy to “either return to the launch site or perform a controlled water landing.”

The license runs through February 15, 2025.

This does not mean a launch has been approved however. The FCC only gives approval for radio communications on such a flight. It is the FAA that must issue the actual launch license, and it as yet not done so.

SpaceX had announced on August 8, 2024 that it was ready to go. It is now almost two weks since then and the FAA has said nothing.

The only justifiable reason for this delay would be that SpaceX has requested permission to do the first chopstick landing of Superheavy at Boca Chica (as suggested by the FCC approval), and since this changes the already approved flight path from the previous four test launches, the FAA is reviewing it more closely, and taking its time to do so.

The simple fact is that it can’t learn anything by this review. It isn’t qualified to make any educated determination. Either it is willing to let SpaceX do that return, or not. If it is against it at this point, it should simply say so, demand SpaceX hold off a chopstick landing until later, and give it permission now to do another ocean landing. At least this way the company would have clarity and could proceed.

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Rocket Factory Augsburg’s rocket fails during 9-engine static fire test

9:21 am

Screen capture of test failure
Screen capture from video of test failure.
Note the flame shooting out sideways.

During a static test yesterday of Rocket Factory Augsburg’s RFA-1 rocket, the first using all nine first stage engines, the rocket experienced what the company called an “anomaly” early in the test, causing a major fire and explosion.

The company’s statement also said the launchpad was “saved” and no one was injured.

I have embedded below a clip from a BBC video of the event. A company official had said only yesterday that it hoped to launch in a matter of weeks, though that official had given no word on whether the UK’s Civil Aviation Authority (CAA) had issued a launch license. I suspect he hoped this test would be successful and the CAA would then issue the license. That won’t happen now.

The test took place at the new commercial Saxavord spaceport in the Shetland Islands, which has also struggled in the past two years to get full licensing from the CAA. It has obtained those licenses, but it would not be surprising if this failure will cause the CAA — which appears very risk adverse — to reconsider its approvals.

Until this failure, Rocket Factory appeared to be in the lead among the new European rocket startups to complete its first launch. That now changes. The Spanish startup PLD hopes to launch from French Guiana in 2025, and is presently building its launchpad there. The UK startup Orbex also hopes to launch in 2025, but it wants to launch from the Sutherland spaceport in Scotland, has faced significant regulatory delays over the past two years from the CAA, and will now likely face further delays because of this failure. Another German startup, Hyimpulse, has already completed a suborbital test launch from Australia, but has not set a date for an orbital test. It originally hoped to launch from Saxavord in 2025, but has been looking for alternatives recently. Finally, the German startup Isar Aerospace has a deal to launch from the Andoya spaceport in Norway, but has announced no launch date.
» Read more

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SpaceX launches 20 more Starlink satellites using a new first stage

8:50 am

SpaceX early this morning successfully launched another 20 Starlink satellites, its Falcon 9 rocket lifting off from Cape Canaveral in Florida.

The first stage was new, having never flown before. It successfully landed on a drone ship in the Atlantic, and is now part of the company’s fleet of Falcon 9 first stages.

The leaders in the 2024 launch race:

83 SpaceX
34 China
10 Rocket Lab
9 Russia

American private enterprise now leads the rest of the world combined in successful launches 98 to 52, while SpaceX by itself now leads the entire world combined, including American companies, 83 to 67.

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