OTV 5 search elements

From: Ted Molczan via Seesat-l <seesat-l_at_satobs.org>
Date: Fri, 3 Nov 2017 09:35:43 -0400
On the evening of 2017 Nov 02 UTC, Russell Eberst made new observations of the bright UNID he spotted on the morning of
2017 Oct 03 UTC, that we suspect is OTV 5.

The following circular orbit fits Russell's timed positions, one each on Oct 03 and Nov 02:

OTV 5 suspect                                            403 X 404 km
1 77203U 77203A   17306.77911249  .00000000  00000-0  00000-0 0    08
2 77203  63.5883 190.6553 0001000   0.0010   0.1122 15.54162386    02

It should be recovered easily in the above orbit. The eccentricity could be somewhat greater, in which case there will
be small time and cross-track errors.

I would like to perform a bit more analysis to assure myself this is OTV 5, before I assign the ID: OTV 5 (USA 277),
2017-052A / 42932.

OTV 5 most likely was inserted into an approximately 43 deg parking orbit. My guess is that the second stage of its
Falcon 9 booster performed the manoeuvre to change the inclination, which I intend to attempt to verify.

Russell's relevant observation reports:

http://satobs.org/seesat/Oct-2017/0007.html

http://satobs.org/seesat/Nov-2017/0007.html

Russell, what was its approximate magnitude on Nov 02, prior to entry into the penumbra?

Ted Molczan

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Received on Fri Nov 03 2017 - 08:36:37 UTC

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