RE: STS-127 ascent visibility

From: Ted Molczan (
Date: Sun Jun 14 2009 - 01:33:50 UTC

  • Next message: gprichard: "2009-028B flashing"

    Sean Sullivan wrote:
    > It seems probable that the next STS-127 launch attempt will 
    > be on June 20 (presuming that LRO keeps its slot on the
    > Eastern Test Range).  This would produce a night launch, with
    > a window approximately 4:30 to 4:35 EDT.  In Florida, this is
    > before astronomical twilight.  From my location in Massachusetts,
    > it's right at the start of civil twilight.
    > Does anyone know if the shuttle's flight trajectory would break into 
    > sunlight during ascent, and if so, when that would happen during the 
    > launch?
    Assuming launch at 08:31:00 UTC, I estimate exit from the umbra at 08:38:42, 103
    km above 35.17	N, 71.79 W. It would exit the penumbra 9 s later.
    Ted Molczan
    Subscribe/Unsubscribe info, Frequently Asked Questions, SeeSat-L archive:

    This archive was generated by hypermail 2b29 : Sun Jun 14 2009 - 01:34:50 UTC