---------- Forwarded message --------- Van: <tristan.cools_at_gmail.com> Date: za 23 mei 2020 om 22:42 Subject: Re: HTV 9, possible post-manoeuvre orbit To: marco langbroek (prive) <marco_at_langbroek.org> I just saw HTV 9 passing right on time according to Marco's elset. So the manoevre must have taken place. Orange color comming out from the West, bright but dimming a bit towards the East but still naked eye. gr, Tristan Cools Op za 23 mei 2020 om 18:51 schreef Marco Langbroek via Seesat-l < seesat-l_at_satobs.org>: > > > For those wanting to try to see the Japanese HTV 9 cargoship tonight: if > the HTV > 9 follows the pattern of previous HTV missions, I expect a manoeuvre to a > higher > orbital altitude at about 19:05 UT today. > > If this indeed is the case, this should be an approximate post-manoeuvre > orbit: > > > HTV 9 prognosis for 23 May post 19:05 UT > 1 75607U 20030A 20144.79513889 0.00000000 00000-0 00000+0 0 00 > 2 75607 51.6684 109.3164 0014817 300.4883 146.4146 15.65779046 07 > > Note that observers in Russia and southeast Europe could perhaps see > something > of the orbit raising burn. > > This is all under the condition that HTV 9 follows the pattern of previous > HTV > missions (particularly HTV 7 which I chose as an analogue, as so far their > orbits are close). > > For NW European observers: this orbit would mean HTV 9 would pass 1.5 > minutes > later compared to the pre-manoeuvre orbit during the first pass in > twilight, and > some 3.5 minutes later during the midnight pass. > > Of course, the reality could be quite different, so start to look around > the > predicted times for the pre-manoeuvre orbit (in case it hasn't manoeuvered > at > all) and continue well past the predictions based on this new elset if > nothing > shows up. > > The Netherlands currently has clear skies. > > - 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 Sat May 23 2020 - 15:44:48 UTC
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