Need help to identify beautiful flashing sat (not Mayak)

From: Vladislav Gooba via Seesat-l <seesat-l_at_satobs.org>
Date: Sun, 16 Jul 2017 02:42:21 +0300
Today when I was staring at night sky between passes of interesting sats,
I've seen interestingly flashing satellite, but I couldn't identify what
exactly it was so now I need help to identify it.
My coords are 48,5266°N, 35,0180°E. All times below are in UT.
It was July 15, 20:17 when I've seen the first flash. It was in point of sky
with azimuth of 300° and height about 30°. The next flash was after 20:18
a couple degrees below 85 UMa. I've caught the sat in my binoculars, it
passed to the north from triangle of stars 21 Boo, 23 Boo, SAO 29046, very
close to them. And it flashed again. I've counted seconds before next flash,
which happened after 20:21 in Draco. I couldn't recall the right position of
the satellite in Draco, so it's trajectory in there might be wrong. Period
was about 40 seconds.
I've drawn the trajectory. You can see it here:
http://i.piccy.info/i9/ac6c901f3981a95a304c68609ed539f1/1500161240/151056/1162463/1.png
Flashes were consistent in brightness, of about -2 mag. Every flash lasted about half of
a second. When not flashing, satellite was changing brightness from 5 to 3.5 magnitude.
I've checked Heavensat with today's databases but couldn't find anything nearly fitting.
Any ideas?

Sincerely,
Vlad
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Received on Sat Jul 15 2017 - 18:43:00 UTC

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