Re: On Orbit Rocket Burn Aug. 2 ~0347 UT?

From: David Oesper (oesper@mac.com)
Date: Tue Aug 03 2010 - 05:04:59 UTC

  • Next message: Russell Eberst: "2010AUG2.OBS"

    Thanks, Ted!  I just checked the clock in my wife's camera (which I used for the exposures) and was embarassed to find it running six minutes fast.  I usually set the camera clock before taking pictures but neglected to last night.  Lesson learned.  So the time of the exposure was from 0341 - 0346 UT, assuming the time saved with the image (Canon Digital Rebel XT) is the start time of the exposure.  Change anything?  If nothing can be identified, then I will have to revisit the possibility that this is some sort of optical reflection in the camera optics, but it sure doesn't look like it to me.  I have taken many such pictures with this camera and lens combination and technique and have never seen a phenomenon like this before.
    
    Thanks again,
    
    Dave
    
    On Aug 2, 2010, at 11:42 PM, Ted Molczan wrote:
    
    > David Oesper wrote:
    > 
    >> A colleague of mine thinks it might have been a rocket plume 
    >> from the Iridium 95 satellite #27375U.  His software shows it 
    >> at EXACTLY the position of the "nebula" in my photo at that 
    >> time.  Possible?
    > 
    > I find it passing about 1 min later than your observation, and touching the eastern edge of the
    > "nebula". The object was in eclipse, so it needed to have made a fairly large burn to illuminate the
    > plume, yet I see no change in the elements. Using IDSat and Findsat, I have found no match against
    > any of the objects in known orbits.
    > 
    > Ted Molczan
    
    
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