Re: Possible Falcon 9 explosion

From: DAVID DICKINSON (ghedi_dave@yahoo.com)
Date: Tue Oct 01 2013 - 01:01:25 UTC

  • Next message: Jonathan McDowell: "Re: Possible Falcon 9 explosion"

    Hi Gang,
       We count 1x Falcon S2 booster, CASSIOPE, 2x clamshell fairings, 6x smaller sats, and 4 spacers in the POPACS payload for a grand total of 14 objects, 6 short of the 20 being tracked. Did we miss anything?
    
    Thanks, 
     
    Dave Dickinson
    Blog: www.astroguyz.com
    Twitter: http://twitter.com/Astroguyz
    Youtube: http://www.youtube.com/astroguyz
    
    
    ________________________________
     From: Jonathan McDowell <planet4589@gmail.com>
    To: Greg Roberts <grr@telkomsa.net> 
    Cc: seesat-l@satobs.org 
    Sent: Monday, September 30, 2013 7:03 PM
    Subject: Re: Possible Falcon 9 explosion
     
    
    Greg - My understanding is that SpX don't think they had an explosion.
    That doesn't mean they didn't get some small pieces
    flying off the vehicle. I agree we'll have to wait for more data and
    see what comes to light.
    
    My rough calculation is that the excess objects may have separated
    around 1640 UTC, while the venting that you saw
    (which I suspect was not a second burn, but a post abort propellant
    dump) was around 1700 UTC I believe?
    
    
    
    On 30 September 2013 18:23, Greg Roberts <grr@telkomsa.net> wrote:
    > Hi Jonathan ( and other readers)
    >
    > Evening - actually my morning now as past local midnight.   Ive just been
    > discussing on the  South African FACEBOOK pages (prior to just having now
    > read the SeeSat items about a possible 2nd stage exolosion) that have
    > covered the event - my page and that of the RSG group - about what appears
    > to be multiple objects in severalof the numerous photographs taken here in
    > South Africa of the event. In view of the comment by Elon Musk that an
    > attempt was made to restart the second stage engine  but the burn was
    > aborted "due to an anomaly"  the question now arises was the "anomaly" an
    > actual explosion of the second stage engine/rocket ?  This might also
    > explain the 20 odd pieces so far confirmed by SPACETRACK.  Having not seen
    > the event myself I have to rely on other peoples images/reports. The
    > satellite/satellites went into earths shadow soon after the "halo" so not
    > enough time to get any seperation. But it was only in shadow for a
    > relatively short time -- did observers north of the equator observe multiple
    > objects close together. From what I understand the six satellites launched
    > are relatively small so not that bright...... of course this is mostly
    > guessing by me so we will have to see what becomes public knowledge - if
    > ever.
    >
    > Cheers
    > Greg
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