Well, I am reading this now:: During my search for he Crew Dragon I was distracted by USA245(13043A/39232) which was showing a big long flare. Because of this distraction I missed the Crew Dragon but I have a picture of this flare: https://drive.google.com/open?id=1PEKaRSG09geMC8FiM8Dc40M8uzdgX9y4 gr, tristan cools BWGS Belgian Working Group Satellites Op zo 31 mei 2020 om 11:59 schreef Marco Langbroek via Seesat-l < seesat-l_at_satobs.org>: > Op 31-5-2020 om 00:56 schreef Marco Langbroek via Seesat-l: > > Op 31-5-2020 om 00:23 schreef Marco Langbroek via Seesat-l: > > > On one of my images, I have it together with USA 245! > > > > https://twitter.com/Marco_Langbroek/status/1266865368552833024?s=20 > > > > - Marco > > > As it turns out, I was imaging Crew Dragon and USA 245 during an actual > close > approach! > > DATE UT SSC NAME TARGET KM angle > 5/30/2020 21:18:16.99 39232 USA 245 CREW DRAGON 125.3 172.8 > > > Now I am starting to wonder whether this was intentional, and USA 245 was > perhaps imaging the Crew Dragon? > > We know that the KH-11 imaged some Space Shuttles, to inspect them for tile > damage, after the Columbia accident. We suspect they also image the X-37B > shortly after launch, to check upon them. > > The analysis above is based on the 20151.85044152 elset for Crew Dragon, > and the > 20146.86101776 elset for USA 245. > > The latter elset was 5 days old, but the position of USA 245 on my > photograph is > very close to the ephemerids. Crew Dragon is about 3 seconds behind on the > used > elset. So there is some leeway of a few seconds in the approach time, and > hence > some leeway in the approach distance (but not more than about 25 km). But > that > this indeed was a relatively close approach, is clear. > > I did not know in advance, it is serendipity that I was imaging it right > at that > moment, within (taking into account uncertainties) seconds of the actual > close > approach. > > Image was taken from 52.1420 N, 4.5016 E (Cronesteyn Park, Leiden), with a > Canon > EOS 80D + SamYang 1.4/85 mm lens _at_ F2.0, 500 ISO, 0.5 second exposure, at > 21:18:19 UT. > > - Marco > > > ----- > Dr Marco Langbroek - SatTrackCam Leiden, the Netherlands. > e-mail: sattrackcam_at_langbroek.org > > Station (b)log: http://sattrackcam.blogspot.com > 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 Jun 01 2020 - 03:09:33 UTC
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