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2nd Stage failure during Starlink 9-3 (www.spacex.com)

submitted 1 month ago* (last edited 1 month ago) by ptfrd@sh.itjust.works to c/spacex@sh.itjust.works

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During tonight’s Falcon 9 launch of Starlink from Space Launch Complex 4 East at Vandenberg Space Force Base in California, the second stage engine did not complete its second burn. As a result, the Starlink satellites were deployed into a lower than intended orbit. SpaceX has made contact with five of the satellites so far and is attempting to have them raise orbit using their ion thrusters.

There's also a tweet saying the same thing in fewer words.

This is the affected mission: Starlink 9-3 launch bulletin

Let's hope it was due to SpaceX pushing the envelope on their in-house Starlink missions in some way, though I have no specific guesses along those lines. Perhaps a manufacturing defect or an operational mistake are more likely to be the leading candidates for the cause.

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[–] ptfrd@sh.itjust.works 10 points 1 month ago* (last edited 1 month ago) (4 children)

A tweet from Musk

Upper stage restart to raise perigee resulted in an engine RUD for reasons currently unknown. Team is reviewing data tonight to understand root cause.

Starlink satellites were deployed, but the perigee may be too low for them to raise orbit. Will know more in a few hours.

[–] threelonmusketeers@sh.itjust.works 6 points 1 month ago

Follow-up tweets:

SpaceX: https://x.com/SpaceX/status/1811804948675617115

The team made contact with 10 of the satellites and attempted to have them raise orbit using their ion thrusters, but they are in an enormously high-drag environment with their perigee, or lowest point of their elliptical orbit, only 135 km above the Earth

Elon: https://x.com/elonmusk/status/1811638892879020243

We’re updating satellite software to run the ion thrusters at their equivalent of warp 9.

Unlike a Star Trek episode, this will probably not work, but it’s worth a shot.

The satellite thrusters need to raise orbit faster than atmospheric drag pulls them down or they burn up.

SpaceX: https://x.com/SpaceX/status/1811805147833729260

Each pass through perigee removes 5+ km of altitude from the highest point in the satellite orbit. At this level of drag, our maximum available thrust is unlikely to be enough to successfully raise the satellites.

SpaceX: https://x.com/SpaceX/status/1811805238699131093

As such, the satellites will re-enter Earth’s atmosphere and fully demise. They do not pose a threat to other satellites in orbit or to public safety.

Sounds like they aren't able to save the satellites, but hopefully they got some useful data.

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