Mystery satellite flare

From: George Kristiansen (
Date: Fri Feb 11 2011 - 17:05:10 UTC

  • Next message: Gerhard HOLTKAMP: "Re: Mystery satellite flare"

    Hi everyone,
    This is a photo from a beautiful summer's night on the 11th August 2010:
    I was trying to photograph Perseid meteors, and while I was doing it, I saw
    a strange satellite flying from west to east, which produced a bright flare
    (by comparison, the brightest star in the photo is about mag. 0.8) in the
    constellation Delphinus. I re-discovered the photo recently, and used Calsky
    and heavens-above to discover that the photo is of an unpredicted flare from
    ROSAT. I don't know very much about it, but I suppose it is likely out of
    control if the flare was not predicted? Does anyone else know about this
    satellite, or have any photos of it? I feel quite happy to have a photo of a
    flare from a 'dead' satellite which cannot be predicted any more.
    Thanks, George ( ).
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