I saw MER

From: Randy John (rjohn@axarosenberg.com)
Date: Tue Jul 08 2003 - 03:36:48 EDT

  • Next message: Ed Cannon: "MER-B"

    The Mer-B spacecraft that is!  I picked it up a little south of Altair
    at a distance of 7000 km.  Perhaps about mag 10-11.  I followed it for
    about 5 minutes until it descended below my roof.
    A little warning for those of you who use elements or vectors from the
    Horizon's telnet site.  The times for the elements are in CT (coordinate
    time, almost the same as TDT).  For us it means you should subtract
    delta-T (currently about 65 seconds) to obtain UT.  I spent about 2
    hours trying to figure out why my SKYSAT program was giving positions
    that were about a radian different from Horizons.
    Note that Horizons predicted positions are given in UT.
    	Randy John
    	Pleasant Hill, CA, USA
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