Category: Behind The Black

Atlas-5 launch of Starliner slips to May 21, 2024

1:25 pm

While ULA has successfully replaced the valve in the upper stage of the Atlas-5 rocket, the first manned launch of Boeing’s Starliner capsule has slipped another four days, to May 21, 2024, because a newly discovered helium leak in the capsule’s service module.

Starliner teams are working to resolve a small helium leak detected in the spacecraft’s service module traced to a flange on a single reaction control system thruster. Helium is used in spacecraft thruster systems to allow the thrusters to fire and is not combustible or toxic.

NASA and Boeing are developing spacecraft testing and operational solutions to address the issue. As a part of the testing, Boeing will bring the propulsion system up to flight pressurization just as it does prior to launch, and then allow the helium system to vent naturally to validate existing data and strengthen flight rationale.

The prevous launch scrub was entirely due to the ULA’s rocket, not anything related to Boeing. This delay however is a Boeing issue, and it only reinforces the general uneasiness everyone feels about Boeing’s quality control work.

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SpaceX launches 20 more Starlink satellites

12:01 pm

SpaceX last night successfully placed another 20 Starlink satellites into orbit, its Falcon 9 rocket lifting off from Vandenberg in California.

The first stage completed its eighteenth launch, landing on a drone ship in the Pacific.

The leaders in the 2024 launch race:

51 SpaceX
21 China
6 Russia
5 Rocket Lab

American private enterprise now leads the world combined in successful launches, 58 to 33. SpaceX by itself now leads the rest of the world, including other American companies, 51 to 40.

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Curiosity looks forward and back

11:34 am

Panorama looking north
Click for original image.

Overview map
Click for interactive map

The images above and below are small sections from 360 degree panorama created on May 13, 2024 from 31 photos taken by the right navigation camera on the Mars rover Curiosity.

The overview map to the right provides the context. The red dotted line indicates Curiosity’s planned route, while the white dotted line its actual route. The rover’s present position is marked by the blue dot. The yellow lines indicate the area covered by the picture above, while the green lines indicate the area covered by the picture below.

The image above looks north, back down Gediz Vallis and across to the north rim of Gale Crater, about 20-25 miles away. The red dotted line marks the rover’s path to get up to this point. All told, Curiosity has climbed about 2,500 feet in elevation since it left the floor of Gale Crater about nine years ago.

The image below looks south, up Gediz Vallis and towards the peak of Mount Sharp (not visible), about 26 miles away and about 16,000 feet higher up. Curiosity might move forward about 500 feet to the small hill on the left (indicated by the red dot), or it might turn west from this point, as indicated by the red dotted line on the overview map.

Panorama looking south
Click for original image.

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A planet with the density of cotton candy?

10:32 am

The uncertainty of science: According to data obtained from ground-based telescopes of a newly discovered transiting exoplanet, that planet has the density of cotton candy.

This new planet, located 1,200 light-years from Earth, is 50% larger than Jupiter but seven times less massive, giving it an extremely low density comparable to that of cotton candy. “WASP-193b is the second least dense planet discovered to date, after Kepler-51d, which is much smaller,” explains Khalid Barkaoui, a Postdcotral Researcher at ULiège’s EXOTIC Laboratory and first author of the article published in Nature Astronomy. Its extremely low density makes it a real anomaly among the more than five thousand exoplanets discovered to date. This extremely-low-density cannot be reproduced by standard models of irradiated gas giants, even under the unrealistic assumption of a coreless structure.”

Such a gas giant is not impossible. For example, Saturn’s density is so low that if you could find an ocean large enough it would float. The scientists theorize that this exoplanet is likly comprised mostly of hydrogen and helium.

Nonetheless, there are phenomenon here that we certainly do not understand.

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Air Force sends letter of concern about Vulcan to ULA

10:21 am

According to a report yesterday [behind a paywall], the Air Force has sent a letter of concern to ULA and its joint owners, Boeing and Lockheed Martin, about the long delays getting its new Vulcan rocket operational.

When the military chose in 2021 ULA and SpaceX to be its two launch providers for the first half of the 2020s, it expected ULA to complete 60% of the launches and SpaceX 40%. It also expected Vulcan to being launching within a year or two, at the latest.

Instead, the first launch of Vulcan did not occur until 2024, and its second launch — required by the military before it will allow Vulcan to launch its payloads — won’t occur until late this year. Worse, the military has a large backlog of launches it has assigned to Vulcan that need to launch quickly.

“I am growing concerned with ULA’s ability to scale manufacturing of its Vulcan rocket and scale its launch cadence to meet our needs,” [Air Force Assistant Secretary Frank] Calvelli wrote. “Currently there is military satellite capability sitting on the ground due to Vulcan delays. ULA has a backlog of 25 National Security Space Launch (NSSL) Phase 2 Vulcan launches on contract.”

These 25 launches, Calvelli notes, are due to be completed by the end of 2027. He asked Boeing and Lockheed to complete an “independent review” of United Launch Alliance’s ability to scale manufacturing of its Vulcan rockets and meet its commitments to the military. Calvelli also noted that Vulcan has made commitments to launch dozens of satellites for others over that period, a reference to a contract between United Launch Alliance and Amazon for Project Kuiper satellites.

ULA says that once operations ramp up, it plans to launch Vulcan twice a month. The Air Force doubts about whether that will be possible however are well founded. To meet that schedule ULA will need delivery per month of at least four BE-4 engines from Blue Origin, and so far there is no indication the Bezos company can meet that demand. Delays at Blue Origin in developing that engine are the main reason Vulcan is so far behind schedule in the first place.

In order to get Vulcan operational, ULA needs to fly a second time successfully. The second launch of Sierra Space’s Tenacity mini-shuttle is booked for that flight, and was originally supposed to launch this spring. Tenacity however was not ready, as it is still undergoing final ground testing. The launch is now set for the fall, but both ULA and the Pentagon are discussing replacing it with a dummy payload should Tenacity experience any more delays.

The source of all of these problems points to Blue Origin. Not only has it been unable to deliver its BE-4 rocket engine on schedule — thus blocking Vulcan — the long delays in developing its own New Glenn orbital rocket (which uses seven BE-4 engines) has given the military fewer launch options. As a result the military has been left with only one rocket company, SpaceX, capable of launching its large payloads.

To put Blue Origin’s problems in perspective, for Blue Origin to finally achieve its many promises and get both Vulcan and New Glenn flying regularly, it will need to begin producing a minimum of 50 to 150 BE-4 engines per year, with two-thirds for its own New Glenn rocket. Right now all evidence suggests the company is having problems building two per year.

In other words, the Pentagon might send a letter of concern to ULA, but it should instead be focusing its ire on Blue Origin.

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XRISM X-ray space telescope functioning despite closed “aperture door”

9:50 am

XRISM, a joint X-ray space telescope built by NASA and Japan’s space agency JAXA, is collecting data despite the failure on one instrument of an aperture door to open.

In January, project scientists said that XRISM was working well except for an aperture door, also called a gate valve, for the Dewar on its imaging instrument, Resolve, which failed to open. The instrument can still operate with the door closed, although the door, made of beryllium, does attenuate some X-rays at lower energies.

At the time, efforts were underway to try and open the gate valve. However, speaking at a May 7 meeting of the National Academies’ Board on Physics and Astronomy, Mark Clampin, director of NASA’s astrophysics division, said those efforts were on hold for the next year and a half.

Instead, the science team decided to proceed with science operations, since the telescope has two other working instruments, and can get data even from this hindered third.

XRISM is a replacement of a previous JAXA X-ray telescope that launched in 2016 but failed immediately.

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May 13, 2024 Quick space links

3:39 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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The left begins recognizing Biden is going to lose

1:08 pm

Frankly, for the Joe Biden campaign these numbers are an absolute disaster
“Frankly, for the Joe Biden campaign these numbers
are an absolute disaster.” Click for full video.

The conservative press this past weekend went gaga over a number of CNN reports that were shockingly negative about Joe Biden’s chances of winning re-election as president.

First CNN’s Fareed Zakaria reviewed the overall situation and bluntly concluded, “The trendlines are not working in Biden’s favor.” Then CNN had several reports outlining Biden’s very bad polling numbers:

The right saw these reports as confirmation from the left — which CNN represents as an operative of the leftist Democratic Party — that the campaign is not going well for Joe Biden, that the momentum right now is for Donald Trump.

What I see is something even more fundamental. The left, for the first time in almost a decade, is accepting the possibility of defeat, and these reports are an almost unprecedented effort by the left to process this possibility.
» Read more

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A galaxy’s net of dust

10:02 am

A galaxy's net of dust
Click for full image.

Cool image time! The picture to the right, cropped, reduced, and sharpened to post here, was taken by the Hubble Space Telescope of the central part of galaxy NGC 4753, 60 million light years away and known as a lenticular galaxy because of its elongated elliptical shape and ill-defined spiral arms. It is believed we looking at this galaxy edge-on.

You can see a wider image of NGC 4753 here, released in January and taken by the Gemini South telescope in Chile. According to that press release, the brown dust lanes that seem to form a wavy net in the foreground are created by a process called differential precession:

Precession occurs when a rotating object’s axis of rotation changes orientation, like a spinning top that wobbles as it loses momentum. And differential means that the rate of precession varies depending on the radius. In the case of a dusty accretion disk orbiting a galactic nucleus, the rate of precession is faster toward the center and slower near the edges. This varying, wobble-like motion results from the angle at which NGC 4753 and its former dwarf companion collided and is the cause of the strongly twisted dust lanes we see wrapped around the galaxy’s luminous nucleus today.

Once again, the limitation of only observing this object from one angle makes it very difficult to untangle what it really looks like. Therefore, these conclusions carry a great deal of uncertainty.

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A detailed look, using satellite imagery, of North Korea’s coastal spaceport

9:41 am

North Korea

Link here. The article, written by analysts at the Center for Strategic and International Studies in Washington, describes in detail the work being done in the past few years at North Korea’s Sohae spaceport on that nation’s western coast, as shown on the map to the right.

This work allowed North Korea to complete its first successful orbital satellite launch of its Chollima-1 rocket in November, after two previous failures.

As North Korea releases almost no information, the analysis depended entirely on high resolution orbital data.

While construction of the coastal launch pad is largely complete and work on refurbishing the original launch pad is largely suspended, work is now concentrated on constructing a large new processing/assembly building and an associated underground facility. Several smaller construction projects are also being pursued.

Overall it appears that North Korea is very serious about developing a full spaceport for both satellite and missile launches.

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ISRO to land its Chandayaan-4 lunar sample return mission near where Chandrayaan-3 landed

9:09 am


Click for interactive map. To see the original
image, go here.

India’s space agency ISRO announced on May 11, 2024 that the landing site for its Chandayaan-4 lunar sample return mission will be in the same area where its Chandrayaan-3’s Vikram lander touched down, carrying the Pragyan rover.

The map to the right shows that location, at about 69 degrees south latitude. The mission will require two launches, and will have five components, a propulsion module, a transfer module, a lander module, an ascender module and a re-entry module. The two rockets will use India’s LVM-3 and PSLV rockets.

The actual mission concept, including which modules will be launched with which rocket as well as whether they will dock in Earth or lunar orbit, has not yet been released. This most recent tweet however mentioned that the lander will only operate for one lunar day, which means it will land, grab its samples quickly, and send the ascender capsule up, all within an Earth week.

A launch timeline for the mission also remains unclear.

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