Object 99406

From: C. Bassa via Seesat-l <seesat-l_at_satobs.org>
Date: Mon, 14 Apr 2014 21:11:20 +0200
Russell Eberst reported observations of an unknown he saw earlier
today. This object turns out to be the same one I saw two days
ago and labelled 99406/14602A. Though the mean motion is unknown,
the fact that 2 days separate Russell and my observations limits
the mean motion to 13.43 revs/day (27 revs in 2 days), 13.93
revs/day (28 revs in 2 days), 14.428 revs/day, (29 revs), 14.925
revs/day (30 revs) or possibly lower or higher values. Of these
guesses the 27 revs in 2 days give by far the best solution with
0.02 deg residuals and a 0.073 eccentricity. This is somewhat
similar to the values of operation NOSS satellites.

With this orbital estimate I went back through the images I
obtained over the past few weeks and found that it passed through
the field-of-view of the fixed camera on April 5th, giving these
three measurements:

99406 14 602A   4171 G 20140405213758178 17 25 1924472+601098 37 S
99406 14 602A   4171 G 20140405213808178 17 25 1923353+571094 37 S
99406 14 602A   4171 G 20140405213818189 17 25 1922625+542861 37 S

Combined with my April 12 measurements I get this orbit:

Unknown 20140412
1 99406U 14602A   14102.01258062  .00000000  00000-0  50000-4 0    05
2 99406  63.2995  99.5124 0737856  80.6176  20.7308 13.43027032    03
# 20140405.90-20140412.01, 9 measurements, 0.006 deg rms

This should be good within a minute.

Regards,
   Cees
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Received on Mon Apr 14 2014 - 14:12:02 UTC

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