Re: NanoSail-D not seen

From: Djlaszlo (djlaszlo@aol.com)
Date: Sun Jan 23 2011 - 17:53:12 UTC

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    Congratulations to Observer Granat for his report and images.  Worth 
    braving some wind  and discomfort at -25C.  Here is a Heavens-Above 
    link for the pass described.  Are we ready to transition from the "not 
    seen" thread?
    Cheers, Dan Laszlo, Ft Collins CO USA
    
    http://www.heavens-above.com/PassDetails.asp?lat=52.9206&lng=78.5828&loc=Yarovoye&alt=100&tz=RFTm6&satid=90027&date=40565.5321928125
    
    
    
    -----Original Message-----
    From: Ted Molczan <ssl3molcz@rogers.com>
    To: seesat-l@satobs.org
    Sent: Sun, Jan 23, 2011 9:02 am
    Subject: RE: NanoSail-D not seen
    
    
    Viktor Voropaev wrote:> According to reports from Yarovoye (Russia) the 
    satellite had > a brightness of about 2m. More information and photos 
    is here:> 
    http://www.astronomy.ru/forum/index.php/topic,7897.msg1452931.html#msg1452931> 
    (in Russian only, I'll translate if necessary).I have not seen any 
    confirmation that the images are of NanoSail-D, so I analyzed one of 
    them, andit appears to correlate closely with the current TLE provided 
    by NASA:1 90027U 0        11021.03111096 +.00000496 +00000-0 +78023-4 0 
    000332 90027 071.9761 003.6513 0021431 200.5132 159.5103 
    14.77037263000254 The observer's stated coordinates are 52.9206N, 
    78.5828E. Altitude not stated, but Heavens-Abovereports ~100 m for 
    several locations in the vicinity. It is not clear whether this is the 
    exact sitefrom which the image was taken, but that is what I assume.The 
    filename of the second of the three images (URL below) indicates that 
    it was taken on 2011 Jan22 at 18:45:00, which is the observer's local 
    time, 6 h ahead of UTC; therefore, ~12:45 
    UTC.http://www.astronomy.ru/forum/index.php?PHPSESSID=iiobj9078q38e74t29l
    3quufo7&action=dlattach;topic=7897.0;attach=286144The trail begins near 
    22:59, +22:56, and ends near 22:57, +27:11 (2000.0). If the site 
    coordinatesand TLE are accurate, then the positions correspond to 
    approximately 12:45:08 and 12:45:18 UTC,respectively, and they agree 
    with the predicted track to within a few one-hundredths of a degree 
    ofarc. The duration is in agreement with the stated 10 s exposure.A 
    check against all objects in known orbits reveals no other likely 
    candidates within 2 min time and2 deg cross-track.According to NASA, 
    perturbations due to drag and SRP (solar radiation pressure) are 
    expected to takethe object out of orbit within 70 to 120 days of sail 
    deployment.USSTRATCOM apparently has yet to catalogue this object, so 
    for now, I suggest that we adopt the nextavailable COSPAR designation, 
    2010-062L. For the catalogue number, I suggest that we use the 
    nextavailable one in the hobbyist UNID numbering sequence, which is 
    90086.Ted 
    Molczan_______________________________________________Seesat-l mailing 
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