Re: your mail

From: Bart De Pontieu (
Date: Fri Feb 04 2000 - 02:14:06 PST

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    On Fri, 4 Feb 2000, Barhorst L.J.C. wrote:
    > In one of the animations shown at the site mentioned below, there is a frame
    > with a possible satellite track or is it a comet? It shows only on one
    > frame.
    > The shots were made 2000 Jan 31 between 9 and 12. If it is a comet I think
    > it should have been on more frames, as you can see the sun move slowly 
    > through the starfield
    There is an animation of Jan 28 from 20:17 to 23:18 and one on Jan 31 from
    1:54 to 5:54, all UT. I'm not sure which animation and which frame you're
    referring to. If you're referring to either one of the above, there are a
    few frames with "stripes" that look like trails.
    Given that SoHO doesn't orbit Earth but is located at L1 between the Sun
    and the Earth, it is highly unlikely anything on those images would be
    More to the point, all of these trails look like cosmic rays
    that have hit the detector. SoHO gets hit by lots of cosmic rays, since it
    is not inside the Earth's magnetosphere (which would provide some
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