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Sources say the secretive Zuma satellite was lost by SpaceX

arstechnica.com

11–17 of 17 posts

Re: Sources say the secretive Zuma satellite was lost by SpaceX

#11

How exactly does likely loss and destruction of payload translate into "performed nominally"? Is that like "stable genius"?

It's possible that the launch vehicle performed nominally but the payload had its own propulsion or attitude control, which failed in some manner and prevented the payload from achieving orbit.

Re: Sources say the secretive Zuma satellite was lost by SpaceX

#12

How exactly does likely loss and destruction of payload translate into "performed nominally"? Is that like "stable genius"?

Maybe they mean the lower stage performed normally?

> the first stage of the rocket behaved nominally enough such that it was able to safely return to Earth and make a land-based landing along the Florida coast.

> According to one source, the payload fell back to Earth along with the spent upper stage of the Falcon 9 rocket.

Re: Sources say the secretive Zuma satellite was lost by SpaceX

#13
No info, and no reliable (identified) sources cited. Photos of the launch show the second stage burned as normal, so that seems to indicate that the launcher wasn't a major issue. And the second stage de-orbit burn was also photographed, and looked like all the others I've seen. Separation of Zuma from the second stage could have been a problem, of course, or there could have been an issue with Zuma itself.

Satellites tend to be reflective due to their use of solar panels, and amateur astronomers track just about everything people launch. Heavens-above's track data[1] doesn't get filled in it either failed or is very low-observability and using an RTG or similar instead of solar power. It's also possible that the payload is in orbit, but couldn't get to the correct orbit, in which case track data will get filled in but the satellite still will have failed...

[1] http://heavens-above.com/SatInfo.aspx?satid=43098&lat=0&lng=...

Re: Sources say the secretive Zuma satellite was lost by SpaceX

#14
post #7

> Sources say the secretive Zuma satellite was lost by SpaceX > As of right now reviews of the data indicate Falcon 9 performed nominally Headline is in complete contradiction with the content of the article.

The rocket performed nominally… The payload, maybe not.

Re: Sources say the secretive Zuma satellite was lost by SpaceX

#15
If SpaceX is responsible for any problems, it will look bad for their reliability. From another article:

> The Zuma mission was originally supposed to launch in mid-November, but SpaceX stood down for a while to study data from payload-fairing test performed for another customer. (The payload fairing is the protective nose cone that encases a spacecraft during launch.)

https://www.space.com/38826-spacex-launches-secret-zuma-miss...

Re: Sources say the secretive Zuma satellite was lost by SpaceX

#16
post #14
post #7

> Sources say the secretive Zuma satellite was lost by SpaceX > As of right now reviews of the data indicate Falcon 9 performed nominally Headline is in complete contradiction with the content of the article.

The rocket performed nominally… The payload, maybe not.

I understand that, but it's not Spacex that lost the payload.

Re: Sources say the secretive Zuma satellite was lost by SpaceX

#17

Maybe saying that the payload was lost, it's part of their plan to keep whatever was launched as secret and confidential as possible.

That was my thought exactly spread misinformation that the satellite/payload crashed and in a couple of years people will forget.
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