Year: 2020

SpaceX launches another sixty Starlink satellites

9:18 am

Capitalism in space: SpaceX today successfully launched another sixty Starlink satellites into orbit, using a reused first stage for the fifth time, the first time they have done this. They also for the first time reused the fairing, for the second time. All told, the cost for this launch was reduced by approximately 70% by these reuses.

However, during launch one 1st stage Merlin engine shut down prematurely, the first time since 2012. You can see the consequence of this during the re-entry burn. After the burn, the rocket seems far more unstable then normal. Soon after the video cut out, and they must have missed the drone ship upon landing, making it a failure. They intend to do a full investigation before their next launch.

The leaders in the 2020 launch race:

5 China
5 SpaceX
3 Russia
2 Arianespace (Europe)

The U.S. now leads China 8 to 5 in the national rankings.

One additional detail: At the beginning of their live stream, they touted Starship/Super Heavy, and put out a call for engineers to apply to work for SpaceX.

The launch is embedded below the fold.
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COVID-19: the unwarranted panic

2:41 pm

Four more stories today indicate once again that the worldwide panic over the corona/COVID-19/Wuhan virus is strongly unwarranted:

The first report, from the science journal Science, provides an update on the situation in South Korea, where testing for the virus has been the most thorough of any nation in the world and where, because of that extensive testing, has shown the death rate has turned out to be far lower than the preliminary statistics have suggested. Out of a population of 50 million, slightly more than 8,000 have been infected, with only 81 dying. This is a death rate of 0.9%, higher than the flu’s 0.1% but not horribly so. And like the flu, most of those deaths have been among the elderly.

The numbers there are now dropping, indicating that the disease might have run its course without causing a catastrophic disaster. There is still a chance it could break out again, but the data suggests otherwise.

Moreover, South Korea controlled the situation without any strong-arm authoritarian tactics, as seen in China and as becoming popular here in the formerly free U.S.

“South Korea is a democratic republic, we feel a lockdown is not a reasonable choice,” says Kim Woo-Joo, an infectious disease specialist at Korea University.

It sadly appears that South Koreans might value freedom more than too many of today’s Americans.

The second article describes research from Wuhan in Hubei province in China, reconfirming the South Korean data. There it appears the death rate was 1.4%, only slightly higher than in South Korea. And once again, the death rate is mostly confined to the older population with already existing health issues, like the flu:
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Tuesday at the non-existent Lunar & Planetary Science Conference

1:43 pm

Boulder on Bennu with changes in layered texture changes

Today was supposed to have been the second day of the week-long 51st annual Lunar & Planetary Conference, sadly cancelled due to fear of the Wuhan virus. As I had planned to attend, I am now spending each day this week reviewing the abstracts of the planned presentations, and giving my readers a review of what scientists had hoped to present. Because I am not in the room with these scientists, however, I cannot quickly get answers to any questions I might have, so for these daily reports my reporting must be more superficial than I would like.

On this day the most significant reports came from scientists working on the probes to the asteroids Bennu and Ryugu as well as the probes to the Moon. The image to right for example is from one abstract [pdf] that studied the texture differences found fourteen boulders on Bennu. The arrows point to the contacts between the different textures, suggesting the existence of layers. Such layers could not have been created on Bennu. Instead, these rocks must have formed on a parent body large enough and existing long enough for such geological processes to take place. At some point that parent body was hit, flinging debris into space that eventually reassembled into the rubble pile of boulders that is Bennu.

Other abstracts from scientists from both the Hayabusa-2 mission to Ryugu and the OSIRIS-REx mission to Bennu covered a whole range of topics:
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Sea Launch arrives in Russia

9:28 am

The floating launch platform, built privately by an international partnership in the late 1990s and now owned by a Russian airline company, has arrived in Russia after a one month sea voyage from California.

Though supposedly owned now by S7, Sea Launch is really controlled by the Russian government and Roscosmos. They hope to use it as launch platform for their new Soyuz-5 rocket, intended as a family of rockets that would replace their venerable the Soyuz rocket originally developed in the 1960s.

Having a floating launch platform will also give Russia the ability for the first time to place satellites in low inclination orbits. The high latitudes of most of Russia means that any launches from any of their spaceports, including the one in Kazakhstan, will have a high inclination as well.

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Arianespace suspends all launches from French Guiana due to COVID-19

1:47 pm

The insanity mounts! Arianespace today announced it is suspending all launches from its French Guiana launchsite due to COVID-19.

No word on how long this suspension will last. So far, French Guiana has six confirmed cases of the Wuhan virus. In recent years that nation has routinely seen between one to two thousand flu cases. I wonder why they didn’t shut down then?

Or if they can ever reopen, considering the severity of flu cases annually?

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Launch failure for China’s new Long March 7A rocket

1:20 pm

The first launch attempt of China’s newly upgraded Long March 7 rocket, dubbed the 7A, ended in failure today.

As is usual for China, very little concrete information was released, about the payload or the failure.

State news agency confirmed failure (in Chinese) just under two hours after launch, with no cause nor nature of the failure stated.

The Long March 7A is an effort by China to replace the use of rockets that use dangerous propellants and are launched in the interior of the country, sometimes dumping their first stages in habitable regions.

The Long March 7A is a variant of the standard Long March 7, which has flown twice. A 2017 mission to test the Tianzhou refueling spacecraft with Tiangong-2 space lab was its most recent activity. The launcher uses RP-1 and liquid oxygen propellant and could replace older models using toxic propellants.

It is also intended to launch from their new coastal spaceport in Wenchang. It did this today, though unsuccessfully.

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Monday at the non-existent Lunar & Planetary Science Conference

1:08 pm

Today I had planned on attending the first day of the 51st annual Lunar & Planetary Science Conference in the suburbs of Houston, Texas. Sadly, for the generally foolish and panicky reasons that is gripping America these days, the people in charge, all scientists, decided to cancel out of fear of a virus that so far appears generally only slightly more dangerous than the flu, though affecting far far far fewer people.

Anyway, below are some of the interesting tidbits that I have gleaned from the abstracts posted for each of Monday’s planned presentations. Unfortunately, because I am not in the room with these scientists, I cannot get my questions answered quickly, or at all. My readers must therefore be satisfied with a somewhat superficial description.
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Falcon 9 aborts automatically at T minus 0

10:23 am

A SpaceX launch attempt today to put sixty more Starlink satellites into orbit aborted at T minus Zero when the rocket’s computer software shut things down just after the engines began firing.

I have embedded the video below the fold. According to the broadcast, they had “a condition regarding engine power,” suggesting that one or more of the Merlin engines did not power up as expected and the computers reacted to shut the launch down because of this.

Not surprisingly, they have not yet announced a new launch date.
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