Re: Rocket fuel dump photographed from Sweden

From: Scott Tilley via Seesat-l <>
Date: Sun, 13 Nov 2016 13:48:04 -0800
Hi Chris

Here's a potpourri of upper stage events from the recent geo insertion 
of the latest GSSAP pair.

It presumably shows insertion burn, deployment of both payloads, CCAM 
and then fuel dump.  Which should give you a sense of what all these 
events generally look like.


Scott Tilley

On 11/13/2016 1:37 PM, Chris Jones via Seesat-l wrote:
> On 11/11/16 7:17 PM, Jonathan McDowell via Seesat-l wrote:
>> This is obviously the Centaur AV-062 rocket stage venting after the
>> Worldview-4 launch
> I have a question about this.  (I'm not (quite) disputing that this is
> what it is.)
> Everything that I read that referenced the Centaur post-Cubesat deploy
> said that the Centaur would burn to depletion and end up in solar orbit.
> Certainly Space-Track is currently only showing 8 objects from this
> launch, with the A object identified as Worldview 4 and the other 7 with
> object type TBA and no assigned name other than Object <letter>.  If we
> assume they are the Cubesats, then the Centaur rocket body is not 
> cataloged.
> My question is this:  Is there a meaningful difference between the
> appearance of a fuel dump and a rocket burn?  To me, a propellant dump
> is a non-combustion event while a burn is (sort of obviously) a
> combustion event.  This picture looks like what I've always associated
> with the appearance of a propellant dump, but I can't recall if I've
> seen a picture of an upper stage firing, so I don't know if they look
> the same.
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