CB Obs April 13, 2018: OTV-5 seen

From: C. Bassa via Seesat-l <seesat-l_at_satobs.org>
Date: Fri, 13 Apr 2018 05:23:07 +0200
Conditions were foggy, so I had to use the DSLR with a 50mm F/1.8 lens
to take 10s exposures near Vega, which was still visible. OTV-5 was
seen visually and photographically about 100s late on Ted's
estimate. From the photographic images I obtain these observations:

42932 17 052A   4171 P 20180413022602034 28 25 1847320+460969 37 S
42932 17 052A   4171 P 20180413022603034 28 25 1851322+452652 37 S

The timing is only accurate to about a second as the camera clock was
used (synchronized manually).

Using these observations and those of April 11th yields this circular
orbit:

OTV-5                                                    356 x 357 km
1 42932U 17052A   18101.12966830  .00000000  00000-0  50000-4 0    03
2 42932  54.4698 145.3095 0001000   0.0000 103.9817 15.71178726    00
# 20180411.13-20180413.10, 9 measurements, 0.009 deg rms

Allow for some uncertainty in the orbit as it is assumed to be
circular, and there may be timing offsets in the photographic
measurements I have not accounted for.

However, my rough magnitude esimate was around 2nd or 3rd magnitude
when passing near Vega, so it should be easily visible. Even with
light fog it was bright and easy to spot.

------------------------------------------------------------------
Setup: EOS70D, 50mm F/1.8, 10s _at_ 800ISO, manual timing/aiming
IOD format: http://www.satobs.org/position/IODformat.html
COSPAR 4171: 52.8344N, 6.3785E, 10m (WGS84)
------------------------------------------------------------------

Regards,
   Cees
_______________________________________________
Seesat-l mailing list
http://mailman.satobs.org/mailman/listinfo/seesat-l
Received on Thu Apr 12 2018 - 22:24:01 UTC

This archive was generated by hypermail 2.3.0 : Fri Apr 13 2018 - 03:24:02 UTC