Re: Iridium 66 flare

From: Rod Sladen (
Date: Fri Aug 24 2001 - 05:34:36 PDT

  • Next message: "Re: Reentry over Houston at 13:05 CDT"

    Steve Newcomb ( wrote:
    > I get a prediction of -5 flare from iridflare program for 
    > Iridium 66 at 22.01.10, but on Heavens Above it shows it 
    > going in shadow at 22.01.05
    If you look closely at the Iridflar output, you will notice that it shows "PnB"
    (Penumbral) rather than "Lit" in the "Ill" (Illumination) column - i.e. the
    satellite is within the earth's shadow, but not totally eclipsed.
    Heavens-Above assumes a cut-off as the satellite starts to enter shadow.
    > Will I see this if I am lucky enough to have clear skies?
    Definitely *well worth* watching for!  Penumbral flares are often decidedly
    red as a result of scattering of the sunlight through the atmosphere.
    Best of luck for clear skies!
    Rod Sladen, Beeston, Nottinghamshire, UK
    52.9230N, 1.2190W
    Unsubscribe from SeeSat-L by sending a message with 'unsubscribe'
    in the SUBJECT to

    This archive was generated by hypermail 2b29 : Fri Aug 24 2001 - 05:36:51 PDT