USA 129 observation

From: Matson, Robert (ROBERT.D.MATSON@saic.com)
Date: Thu Jul 12 2001 - 12:04:40 PDT

  • Next message: Matson, Robert: "96072A glint"

    Hi Ted and List,
    
    Observed USA 129 last night.  Recorded several positional points,
    but I'll just post my most accurate one where the satellite nicely
    split HP #103200 (mag 5.03) and HP #102949 (mag 5.66):
    
    12 July 04:15:47.9 -- RA 20.8807 hours, Dec +28.18 deg [J2000]
    
    From COSPAR #8733 (Newport Coast, CA -- 33.6028 N, 117.8263 W, 200m)
    
    Observation is in close agreement with the elements Ted just
    posted:
    
    > USA 129         15.0  3.0  0.0  5.1 v
    > 1 24680U 96072A   01193.17032986  .00029829  00000-0  41375-3 0    00
    > 2 24680  97.9365 254.8870 0502874 148.9247 214.3032 14.77496090    08
    > 
    Satellite came about 0.3 seconds early compared to SGP4 predictions
    using the above elset.
    
    The satellite produced a sharp glint (at least mag +1) sometime
    between 4:16:15 and 4:16:30 (in the vicinity of azimuth 60 deg,
    elevation 24 deg).  It was quite unexpected, so I'm afraid I
    can't estimate the time any better than that.  Something to look
    for if USA 129 is making a northbound pass in your evening
    northeast sky.
    
    Cheers,
    Rob
    
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