Hello Marco, Here is the result of my photographic observations performed on 23 NOV 2020 : photometric period = 138.39s +/- 0.33s . In fact, from a russian source (mmt9.ru), the rocket photometric period appears to be quickly decreasing. What may nicely explain the difference between both your results on the nights of 20-21 and 22-23 NOV. More info at : https://www.flickr.com/groups/1983844_at_N22/discuss/72157714407081322/72157717098337312 Regards Alain 48.67° N ; 2.13° E ; 170m a.s.l. Le mar. 24 nov. 2020 à 17:08, Marco Langbroek via Seesat-l < seesat-l_at_satobs.org> a écrit : > Op 21-11-2020 om 18:29 schreef Marco Langbroek via Seesat-l: > > > After analysis of my imagery, I get a period of ~140 seconds (=2m 20s) > from data > > between 03:36:00 - 03:43:08 UT. > > > Based on video observations in the night of Nov 22/23, I can now offer a > slightly more precise value of (nominally) 138.02 seconds peak-to-peak. > > This is based on a 23-minute near continuous set of video data between > 23:36 and > 23:59 UT (Nov 22), covering 10 brightness peaks, taken with a WATEC 902H2 > Supreme and Samyang 1.4/85 mm lens. > > Curve: > > > https://sattrackcam.blogspot.com/2020/11/brightness-variation-of-nrol-101.html > > The brightness varied semi-regularly between mag +6.0 and +8.5. Given the > range > and phase angles, this corresponds to an absolute magnitude between +2.0 > and +4.5. > > - Marco > > > ----- > Dr Marco Langbroek - SatTrackCam Leiden, the Netherlands. > e-mail: sattrackcam_at_langbroek.org > > Station (b)log: http://sattrackcam.blogspot.com > Launchtower: http://launchtower.langbroek.org > Twitter: _at_Marco_Langbroek > ----- > _______________________________________________ > Seesat-l mailing list > http://mailman.satobs.org/mailman/listinfo/seesat-l > _______________________________________________ Seesat-l mailing list http://mailman.satobs.org/mailman/listinfo/seesat-lReceived on Mon Nov 30 2020 - 04:08:26 UTC
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