RE: Cosmos-1 not seen

From: Ted Molczan (
Date: Tue Jun 21 2005 - 17:55:40 EDT

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    Leo Barhorst reported:
    > Just came in from trying to observe Cosmos-1.
    > I had a nice pass from 21:23 to 21:26 UT, but didn't see it. 
    > Sky was still very bright and also some cirrus. I used my 
    > 16x50 bino's. 
    > Near my second point I could just see a mag 6 star;
    > so probably Cosmos-1 was fainter than that.
    Based on the size of the spacecraft bus, on your pass I estimate maximum
    brightness of mag 8.4 +/- 2, so I agree that it was unlikely you would have seen
    it given your limiting magnitude of 6.
    Ted Molczan
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