Re: De-orbit burn Zuma Falcon 9 upper stage seen

From: Bill Bard via Seesat-l <seesat-l_at_satobs.org>
Date: Tue, 9 Jan 2018 07:57:47 -0500
Reddit has posts of images of an apparent upper stage event.

https://www.reddit.com/r/whatisthisthing/comments/7oy9yi/a_weird_looking_star_showed_up_in_sudans_sky/

One image was posted on Facebook seeming to show a discharge or burn while spinning. I thought SpaceX upper stage just deorbits, not bent fuel. 

If the speculation of a Zuma failure is true, I’m wondering if this was the deorbit burn with the payload attached causing it to spin in which case it seems that it might still be in orbit.

Bill

> On Jan 8, 2018, at 3:35 PM, Marco Langbroek via Seesat-l <seesat-l_at_satobs.org> wrote:
> 
> 
> 
> Verstuurd vanaf mijn iPad
> 
>> Op 8 jan. 2018 om 19:24 heeft Marco Langbroek via Seesat-l <seesat-l_at_satobs.org> het volgende geschreven:
>> 
>> Op 8-1-2018 om 19:10 schreef Marco Langbroek via Seesat-l:
>> 
>>> The images definitely show something rocket-related. Time reportedly was near
>>> 2:18 UT (January 8), location flying above Khartoum in Sudan.
>> 
>> 
>> The time quoted bothers me a bit, as it is too early. 3:18 UT rather than 2:18
>> UT would match my approximate Zuma trajectory reconstruction better, as 3:18 UT
>> would place the Zuma rb around East Africa.
>> 
>> I have put out some questions to the eyewitness, so maybe mor eon this later.
> 
> 
> I have had contact with the pilot now, and the initially quoted time was in error by one hour and should be ~3:18 UT. The flight log shows the aircraft passed Khartoum around 3:25 UT. On the images, Khartoum can be seen in front of the (southbound) aircraft.
> 
> This also confirms that my orbital estimate for Zuma appears to be correct. In my orbit estimate for the upper stage, it would pass over east Africa ~3:15 UT, i.e. the times match to within minutes.
> 
> I will post the images on my blog later this week.
> 
> - Marco
> 
> 
> 
> 
>> 
>> - Marco
>> 
>> 
>> -----
>> Dr Marco Langbroek  -  SatTrackCam Leiden, the Netherlands.
>> e-mail: sattrackcam_at_langbroek.org
>> 
>> Cospar 4353 (Leiden):     52.15412 N, 4.49081 E (WGS84), +0 m ASL
>> Cospar 4355 (Cronesteyn): 52.13878 N, 4.49937 E (WGS84), -2 m ASL
>> Station (b)log: http://sattrackcam.blogspot.com
>> Twitter: _at_Marco_Langbroek
>> -----
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Received on Tue Jan 09 2018 - 06:59:31 UTC

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