RE: What did I See?

From: Ted Molczan (ssl3molcz@rogers.com)
Date: Sun Nov 21 2010 - 23:46:55 UTC

  • Next message: Bill Arnold: "Obs for Nov. 21"

    Gordon wrote:
    
    > On 20Nov10 I observed a satellite rising in the northwest. Its
    > speed and brightness led me to assume it was the HST until I
    > noticed that it was angling too far to the south. At 0945UT it
    > passed well north of Jupiter and continued on into the east.
    
    How far north of Jupiter? Did you see it enter eclipse? If so, what was the approximate elevation?
    
    X-37B's plane was in the vicinity. Its precise orbit is currently unknown to us, but here are a
    couple of guesses that put it in the sky at the time you reported:
    
                                                             281 X 295 km
    1 70001U          10316.86597222  .00023982  00000-0  55503-4 0    09
    2 70001  39.9869 182.7876 0010302 337.6109  52.2222 15.96000000    04
    
                                                             354 X 368 km
    1 70002U          10316.86597222  .00006938  00000-0  55503-4 0    02
    2 70002  39.9869 182.7876 0010302 337.6109  52.2222 15.70000000    07
    
    Both guesses are based on a guess as to the approximate date/time of the latest manoeuvre; the 70001
    elset is based on a lower orbit; 70002 on a higher orbit.
    
    If you intend to try these, allow at least 5 min uncertainty per 24 h, and for high passes, keep in
    mind that Earth's rotation shifts the sky track rapidly over time.
    
    Ted Molczan
    
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