Photometric period of flashing 2015-071-C

From: Alain Figer via Seesat-l <>
Date: Tue, 8 Dec 2015 17:30:20 +0100 (CET)
Max White wrote :
"I'll agree with the 71C Volga - seen naked eye invisible to +2 every 12 seconds, on time through Cygnus, so an approx 25 second rotation.
This morning was clouded out and 2511 had decayed some hours beforehand."

From a set of 26 wide-angle photos (3.2 s duration at ISO 4000) taken last night  I derived a photometric period of 10.7 seconds for 2015-071-C, that Igor Lissov identified as follows:
"071C = Soyuz-2.1V second stage".
The rotation period is not necessarily 2 times this value of 10.7 s, as secondary maxima were probably detected near the end of my observation. However the satellite pass was then partly hidden by trees in my garden, so it remains somewhat doubtful.

Alain Figer

PS. Due to a bug somewhere, I can't use the "reply" function to the Seesat-L and must open a new thread for posting to the List. Sorry for the inconvenience.

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Received on Tue Dec 08 2015 - 16:30:20 UTC

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