Re: Telstar 401 flash times?

From: Björn Gimle (
Date: Fri Dec 02 2005 - 13:25:04 EST

  • Next message: Leo Barhorst: "Re: LB obs 2005 Dec 02; Superbird A??"

    I have not kept up-to-date with recent observations made, by finding the 
    RA/dec of the observed flash timings.
    If my model for Nov.10-16 flash holds, Ed's initial flashes Dec.1 and 2 
    came from a surface 90.0 degrees from "my" axis.
    This matches the majority of old observations, of which Ed's cover six 
    sections of a circle, with only one large gap (about 7h of RA)
    Only the Nov.2003 series matches the 86-degree surface matching the 
    Nov.10-16 observations.
    Ed: Do the (times and ) RA of your recent obs form a smooth series with 
    your earlier Nov.obs, or do you find jumps?
    However, for Ed's Dec.1-2 start obs I find declination -13.2 and RA 
    I don't know the location of Orange County, or if Irvine is there, but 
    if you can see Telstar 401 near declination -13.2, you should have 
    flashes near RA 21:55 tonight.
    This seems to be OK for Irvine.
    But if you are at a different latitude, the changes are substantial. 
    Now/there I401 moves hardly at all in declination, so 4 degrees of 
    latitude can move the flash 0.5 degrees up or down, thus several hours 
    of RA/time, or make them almost invisible.
    I401 rotation axis is close to the poles. Superbird-A has it near the 
    equator, so its flashes move mainly in declination, so the intersection 
    with the track is nearly at the same RA for all observers.
    ----- Original Message ----- 
    From: "Ed Cannon"
    > Mark Hanning-Lee asked:
    >> When should I look from Orange County, California, to
    >> see Telstar 401 flashing?
    > I expect the first one-power flash here to be at about
    > 0:59 UTC 
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