5919 UNID Obs

From: Björn Gimle via Seesat-l <seesat-l_at_satobs.org>
Date: Fri, 12 Sep 2014 14:00:56 +0200
On the evenings of Sep 9 and 10 I tried partial and full-orbit scans
for USA 129, despite moon, clouds and battery drain.

While reducing some of the captured tracks, I realized that with the drag
term of the 14114 elset, USA 129 could well have decayed by now.

Nevertheless, one of my search elsets matched an track of a LEO sunsynch
NB. No match found in Heavensat or SkyMap.

In the preparations I also noticed that HS, SM, H-A and Vec2TLE disagreed
strongly both in pass times (up to 30 minutes), and the time when I passed
through the orbit plane (+- 6 min), despite using the same elset 14114.

CalSky was far off, using a 1100+ day old elset (!). Also, a strange
"feature" since a few months is that requesting TLEs at CS opens a link to
SpaceTrack, though it acknowledges that "orbit source: amateur observations"


74680 96 072A   5919 F 20140910194514000 18 25 1132052+554428 55 S
74680 96 072A   5919 F 20140910194515500 18 25 1125459+545465 55 S
74680 96 072A   5919 F 20140910194522000 18 25 1111170+525503 55 S
74680 96 072A   5919 F 20140910194524500 18 25 1106289+521093 55 S
Obs - Pred: 84.250 min X-track; 14.147 s late, relative -0.09 day old elset:
Obs - Pred: 78.189 min X-track; 13.636 s late, relative -0.09 day old elset:
Obs - Pred: 68.679 min X-track; 14.982 s late, relative -0.09 day old elset:
Obs - Pred: 65.980 min X-track; 15.440 s late, relative -0.09 day old elset:
USA 129 h1
1 74680U 96072A   14253.91250000  .00077000  00000-0  35722-3 0    18
2 74680  97.5219 315.5038 0240080  97.8837 112.8941 15.71122180 21341

-- 
----------------------------------------
Björn Gimle, COSPAR 5919
59.2617 N, 18.6169 E, 51 m
Phone: +46 (0)8 571 43 312
Mobile: +46 (0) 704 385 486
_______________________________________________
Seesat-l mailing list
http://mailman.satobs.org/mailman/listinfo/seesat-l
Received on Fri Sep 12 2014 - 07:01:53 UTC

This archive was generated by hypermail 2.2.0 : Fri Sep 12 2014 - 12:01:54 UTC