Tag: spaceflight

The crash of China’s Long March 5B core stage: first rough prediction

10:35 am

Long March 5B reentry prediction as of 11/2/22

The Aerospace Corporation has made its first rough estimate of the uncontrolled reentry of the core stage of China’s Long March 5B rocket that launched the Mengtian module to its Tiangong-3 space station on October 31st.

The prediction at present is very uncertain, covering about 20 orbits (about 30 hours) centered on November 5, 2021 over the Atlantic Ocean northeast of Brazil, as shown in the graphic to the right. Though this prediction will eventually narrow down to less than one full orbit, it will never be possible to predict in advance the core stage’s exact impact point. As the margin of error shrinks, the predictions will come more frequently.

At this moment, however, the core stage’s orbit crosses over most of the habitable areas of the Earth, and thus all those regions are under threat.

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Two Saudi passengers to fly on Axiom’s second commercial flight to ISS

10:21 am

According to one NASA official, Axiom now plans on launching two as yet unnamed Saudi passengers on AX-2, its second commercial flight to ISS scheduled to launch in May 2023 on a Dragon capsule.

The names of the two Saudis on the flight have not been released, she said, but that “we are working very hard with them on training already.” A slide for her presentation noted the two would be named after formal approval by the ISS program’s Multilateral Crew Operations Panel. That slide also stated that crew training for the mission started Oct. 17.

The Saudi Space Commission and Axiom Space separately announced Sept. 22 plans to fly two Saudi citizens on a future Axiom Space mission. However, while it was widely rumored the two would fly on Ax-2, neither announcement stated a specific mission. The Saudi statement said that one of the two people would be a woman but did not disclose how the astronauts would be selected.

Neither Axiom nor the Saudis have revealed the ticket price, though it probably runs somewhere in the range of $20 to $50 million per ticket, based on past known purchase prices by NASA and others.

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Rocket Lab to attempt 1st stage recovery on November 4th launch

10:15 am

Rocket Lab announced yesterday that it will make its second attempt to catch the first stage of its Electron rocket using a helicopter during its next launch on November 4, 2022.

Using a modified Sikorsky S-92 helicopter to catch and secure the rocket by its parachute line, Rocket Lab will bring the captured stage back to its Auckland Production Complex to be processed and assessed by engineers and technicians for possible re-use.

This Electron recovery effort follows the catch of an Electron first stage during Rocket Lab’s first helicopter recovery attempt on the “There And Back Again” launch in May, and the recovery attempt for this mission will follow the same concept of operations as the previous launch.

In the May recovery attempt, the helicopter caught the stage, but then released it almost immediately because of unexpected stresses on the helicopter. If Rocket Lab is successful this time, it will be only the second private rocket company to recover a first stage capable of reuse, after SpaceX.

The launch itself will take place at 10:15 am (Pacific). When the live stream is available I will embed it on Behind the Black.

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InSight status update: still alive!

9:45 pm

InSight's daily power levels through October 31, 2022

UPDATE: JPL has released a press release, outlining the steps the InSight team will take to shut the mission down. Key quote:

NASA will declare the mission over when InSight misses two consecutive communication sessions with the spacecraft orbiting Mars, part of the Mars Relay Network – but only if the cause of the missed communication is the lander itself, said network manager Roy Gladden of JPL. After that, NASA’s Deep Space Network will listen for a time, just in case.

There will be no heroic measures to re-establish contact with InSight. While a mission-saving event – a strong gust of wind, say, that cleans the panels off – isn’t out of the question, it is considered unlikely.

Original post:
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Another update on the power levels on the Mars lander InSight was released today, and is shown on the graph to the right.

As of October 31, 2022, InSight is generating an average between 280 and 290 watt-hours of energy per Martian day, or sol. The tau, or level of dust cover in the atmosphere, was estimated at 1.33 (typical tau levels outside of dust season range from 0.6-0.7).

Though the dust level in the atmosphere has dropped, it still is high. Moreover, there is no sign of any clearing of dust from InSight’s solar panels. During the press conference late last week announcing the discovery of impact craters using InSight’s seismometer, the science team gave the lander no more than six weeks of life. One of those weeks has now ticked off.

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Streaks on the Moon

12:48 pm

Streaks on the Moon
Click for full image.

Cool image time! The photo to the right, reduced and enhanced to post here, is an oblique view taken by Lunar Reconnaissance Orbiter (LRO) of the rays that were created when four million years ago an object smashed into the Moon’s far side and produced the 13.75 mile-wide Giordano Bruno crater.

Rays are formed as material ejected from an impact event slams into the surface and churns up local material. Rays are bright because they expose fresh material from depth (both the incoming material and locally churned soil). What is fresh material? Over time the lunar surface is impacted by micrometeoroids and bombarded by radiation; both processes work to darken the surface. The dark “mature” layer at the surface is often only about 50 cm (20 inches) thick, so energetic impacts can easily bring up fresh material from the subsurface. Eventually, the bright rays darken and fade into the background as the surface matures.

In this image, you can see where the ejecta blocks from Giordano Bruno hit the surface, creating a secondary crater, which dug up local material and spread that bright material downstream (so to speak).

The image itself is 4.78 miles wide, at its center, and was snapped from an altitude of 66 miles.

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Japanese private lunar lander HAKUTO-R now scheduled for launch on November 22nd

9:45 am

The private lunar lander HAKUTO-R, built by the Japanese company Ispace, has now been scheduled for a November 22, 2022 launch on a Falcon 9 rocket.

The launch of the first commercial lunar lander mission to attempt a landing on the Moon was originally scheduled between November 9 -15. However, ispace stated that after consulting with SpaceX, the new tentative launch date would be moved to November 22 because it “allows for best preparation for the mission when considering the fuel-loading schedule for the lander and launch date availability.” SpaceX has a busy schedule at the Cape and NASA still has the Artemis 1 launch scheduled for November 14.

HAKUTO-R’s primary mission is to test the lander. However, it also includes several customer payloads, the most significant of which is the Rashid rover from the United Arab Emirates. Rashid, which is about the size of a Radio Flyer red wagon, will operate for one lunar day, about two weeks. While its main mission is to test the engineering and to train the engineers who built it, it will have two cameras for taking pictures. In addition, on its wheels are test adhesive patches of different materials, designed to see how each material interacts with the Moon’s abrasive dust.

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Astronomers discover a new large potentially dangerous near-Earth asteroid

9:36 am

Using a variety of ground-based telescopes, astronomers have discovered three new near-Earth asteroids orbiting the Sun but inside Earth’s orbit, with one of these asteroids having the possibility of one day in the future impacting the Earth.

An international team using the Dark Energy Camera (DECam) mounted on the Víctor M. Blanco 4-meter Telescope at Cerro Tololo Inter-American Observatory in Chile, a Program of NSF’s NOIRLab, has discovered three new near-Earth asteroids (NEAs) hiding in the inner Solar System, the region interior to the orbits of Earth and Venus. This is a notoriously challenging region for observations because asteroid hunters have to contend with the glare of the Sun.

By taking advantage of the brief yet favorable observing conditions during twilight, however, the astronomers found an elusive trio of NEAs. One is a 1.5-kilometer-wide asteroid called 2022 AP7, which has an orbit that may someday place it in Earth’s path. The other asteroids, called 2021 LJ4 and 2021 PH27, have orbits that safely remain completely interior to Earth’s orbit. Also of special interest to astronomers and astrophysicists, 2021 PH27 is the closest known asteroid to the Sun. As such, it has the largest general-relativity effects of any object in our Solar System and during its orbit its surface gets hot enough to melt lead.

You can read their paper here [pdf].

2002 AP7 is the largest such potentially dangerous asteroid discovered in eight years. Its present orbit however never brings it closer to the Earth than 4.4 million miles, and it will be many thousands of years before that orbit might result in an impact. This of course doesn’t prevent foolish mainstream news outlets like the New York Times to label it a “planet-killer.”

The importance of this study however is that it underlines the possibility that there might be other such asteroids lurking close to the Sun that are difficult to spot. This is a blind spot in our asteroid surveys that needs to be eliminated.

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Lockheed Martin invests $100 million in startup satellite maker Terran Orbital

9:14 am

Lockheed Martin has now invested $100 million in the startup smallsat-maker Terran Orbital, which has already been building satellites of a wide variety for customers.

Under the deal, which runs through 2035, the smaller Florida-based firm will build SAR and other advanced payloads, as well as satellite sub-assemblies, for the aerospace behemoth, Terran said in a press release today. These include electro-optical, hyperspectral, infrared and secure communication payloads, as well as things like star trackers and flight computers.

With this deal, Terran has also decided that it will no longer launch its own radar constellation, as that constellation would have competed directly with its radar satellite customers. Instead, it will make its radar satellite for others, including Lockheed Martin.

As an example of the variety of smallsats Terran Orbital has been building, it manufactured the smallsat lunar orbiter CAPSTONE for NASA, now on its way to the Moon but being operated for NASA by a different private company, Advanced Space.

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Orbex signs 50-year lease at Sutherland spaceport

9:03 am

The British startup rocket company Orbex has signed a 50-year lease to operate its own launchpad at the Space Hub Sutherland spaceport in Scotland.

The company will lease Space Hub Sutherland from a local development agency for an initial period of 50 years with an option to extend for a further 25 years. Orbex will soon commence construction at the 10-acre launch site on the A’Mhoine peninsula in Sutherland. The bulk of the construction work will be contracted out to technology solutions company Jacobs, which also does a lot of work for NASA.

The company hopes to launch its Prime rocket in ’23. At present it is testing launch operations of a prototype on its launchpad. All told, Orbex has raised a little over $100 million in private investment capital.

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Mengtian module docks with China’s Tiangong-3 space station

8:54 am

Tiangong-3 station, when completed

The new Mengtian module has docked with the main port of China’s Tiangong-3 space station.

The graphic to the right shows the planned design of the station. Mengtian however is not yet in its side port as shown, but in the main docking port in line with the core module where a Shenzhou crew capsule is shown docked. At some point soon the astronauts on board will use a small robot arm to move Mengtian from the main port to its side port. (This system is very similar to one the Russian’s used on Mir.)

Furthermore, the large vertically oriented solar panels have not yet been installed on the station. These will likely need to be delivered, and require spacewalks to deploy.

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Falcon Heavy launches successfully for 1st time since 2019

8:16 am

Capitalism in space: SpaceX today successfully put a military reconnaissance satellite using its Falcon Heavy rocket, its first launch since 2019.

The two side boosters and core stage all made their first flight. The core stage was intentionally not recovered, as it needed to use all its fuel for getting the satellite to its orbit. The two side boosters successfully landed at SpaceX’s two landing sites at Cape Canaveral.

The leaders in the 2022 launch race:

50 SpaceX
47 China
18 Russia
8 Rocket Lab
7 ULA

American private enterprise now leads China 70 to 47, though it still trails the rest of the world combined 74 to 70.

This year’s 70 successful launches ties the previous high for the United States in a single year, set in 1966. With two months still left in the year, it looks like that record will be broken, by a lot.

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