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-lReceived on Thu Apr 12 2018 - 22:24:01 UTC
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