Re: UNIDS 2018 Aug 17-18 night

From: Leo Barhorst via Seesat-l <seesat-l_at_satobs.org>
Date: Mon, 20 Aug 2018 08:56:47 +0200
 In the night 2018 Aug 17=18 four UNIDs were imaged, but only one could be
ID-ed by satfit and one possibly.

Mike McCants ID-ed 18 729B as 16624.
For 18729C he found inconsistancy in the point, I measured the track again.
Satfit came up with a good candidate: 13874; last seen 61 days ago.
It was predicted some 5 minutes earlier.

18 729A moved too much in only 0.65 seconds, much too fast to be a
satellite.
So this was a meteor. I imaged several meteors this night.

35938 09 052B   4172 G 20180818020110777 17 25 0220754+555898 37 S
35938 09 052B   4172 G 20180818020115419 17 25 0229624+560475 37 S
35938 09 052B   4172 G 20180818020121698 17 25 0241663+560868 37 S
16624 86 014E   4172 G 20180817205655973 17 25 2313023+585276 37 S
16624 86 014E   4172 G 20180817205702611 17 25 2310724+551308 37 S
16624 86 014E   4172 G 20180817205707770 17 25 2309457+522743 37 S
13874 83 008H   4172 G 20180817214828479 17 25 0704294+763481 37 S
13874 83 008H   4172 G 20180817214835320 17 25 0704141+761628 37 S
13874 83 008H   4172 G 20180817214839439 17 25 0621849+764252 37 S

Obs format: http://www.satobs.org/position/IODformat.html
Residuals wrt the latest classfd.tle file before the session start.
Norad Cospar         Cross-track      delta T      TLE age  range
35938 09 052B   |-0.15432 deg -234.461 sec  61.2 day, 2086.4 km
16624 86 014E   |294.51497 deg  556.396 sec 123.1 day, 11182.9 km
13874 83 008H   |-38.71433 deg -576.435 sec  94.1 day, 1965.2 km

The residuals of the other classified satellites are low.
2018 total obs: 13226 + 9 = 13235
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Setup: WATEC 910HX/RC, 50 mm F1:1.8, NTP, Celestron Nexstar
Observations made and reduced with Sattools
Cospar 4172 ALMERE 52.3713 N 5.2580 E –3 ASL
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Received on Mon Aug 20 2018 - 01:57:48 UTC

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