USA 186 recovered

From: Ted Molczan via Seesat-l <seesat-l_at_satobs.org>
Date: Wed, 8 Jun 2016 08:33:31 -0400
Paul Maley recovered USA 186 (05042A / 28888) last night.

I reduced the following three points from video frames, using ObsReduce.

28888 05 042A   9802 G 20160608032756259 17 25 1006976+161687 37 S
28888 05 042A   9802 G 20160608032805068 17 25 0947043+235912 37 S
28888 05 042A   9802 G 20160608032807337 17 25 0941641+255476 37 S

Paul's site co-ordinates are 33.8117 N, 111.9524 W, 659 m. Site ID number 9802 is provisional.

When combined with Alberto Rango's first observation of June 03 UTC, Paul's observation yield the following elements:

USA 186                                                  282 X 435 km
1 28888U 05042A   16160.13854202  .00024927  00000-0  14940-3 0    02
2 28888  96.8849 198.4536 0112974  88.9947 272.4258 15.69070109    03
Arc 20160603.81-0608.14 WRMS resid 0.050 totl 0.046 xtrk

These elements indicate that the re-boost consisted of a perigee-raising at apogee - the opposite of what usually is
done. This is entirely plausible; however, the elements are based on very few observations, and the residuals against
Alberto's 2nd and 3rd observations of June 03 are large. Additional observations over several nights are required to
confirm the new orbit and to refine the elements.

Ted Molczan


_______________________________________________
Seesat-l mailing list
http://mailman.satobs.org/mailman/listinfo/seesat-l
Received on Wed Jun 08 2016 - 07:34:39 UTC

This archive was generated by hypermail 2.3.0 : Wed Jun 08 2016 - 12:34:39 UTC