Radio tracking confirms that the latest TLE set for Nauka is correct within seconds. The next maneuvers are planned for 27 July. NJ On 25-07-2021 19:36, Leo Barhorst wrote: > Hello, > > Just saw a new TLE for Nauka on Space-Track for day 206, that is today. > > > I will have a high elevation pass later this evening and will try do > make an obs, weather permitting. > > Leo > > Op zo 25 jul. 2021 om 14:22 schreef Nico Janssen via Seesat-l > <seesat-l_at_satobs.org>: >> >> My interpretation was not correct: last night (UTC) Nauka was >> already about 11 minutes late. So today it will be much later >> than that. >> >> NJ >> >> On 25-07-2021 13:28, Nico Janssen via Seesat-l wrote: >>> If my interpretation of available radio tracking data is correct, >>> then Nauka is now some 100 s late on its latest TLEs. After >>> 17:00 UTC today I may have better data. But by that time >>> new TLEs may have been published. >>> >>> NJ >>> >>> On 25-07-2021 13:18, Marco Langbroek via Seesat-l wrote: >>>> Hi all, >>>> >>>> It seems 18 SpCS is having trouble providing Space-Track with updates >>>> on the >>>> orbits of Nauka and the Proton rb. The last available elements are >>>> over 1.25 >>>> days old now. >>>> >>>> This is very annoying, as all of us are holding our breath to see if >>>> the series >>>> of orbit manoeuvres succeed, after the recent trouble experienced >>>> with the Nauka >>>> engines. >>>> >>>> This also means that we as an amateur community might be able to step >>>> in and >>>> update, for the public, Nauka's orbit. >>>> >>>> As a starter, below are my obs from the evening of 23 July (July 24 was >>>> unfortunately clouded out). If more of us provide astrometry, we can >>>> update the >>>> orbit. >>>> >>>> As an interesting aside, showing that our amateur data are actualy >>>> usefull: >>>> yesterday I was at the SpaceTech Symposium at ESTEC in Noordwijk, >>>> where I did a >>>> talk about our amateur tracking work that was very well recieved. >>>> One of the ESA people told me that back in 2007-2008 they were very >>>> happy to >>>> have our amateur orbit determinations on USA 193, as that was their >>>> only source >>>> at the time to asses where it was. This was relevant to them because >>>> it was at >>>> low altitude and they had an ATV launch planned for March 2008 >>>> (eventually, USA >>>> 193 was shot down before that date). >>>> >>>> My July 23 data on Nauka: >>>> >>>> 49044 21 066A 4353 G 20210723211149061 15 75 1526343+268550 85 S >>>> 49044 21 066A 4353 G 20210723211151021 15 75 1538233+271190 85 S >>>> 49044 21 066A 4353 G 20210723211217060 15 75 1834276+231600 85 S >>>> 49044 21 066A 4353 G 20210723211219020 15 75 1846158+223680 85 S >>>> 49044 21 066A 4353 G 20210723211224260 15 75 1914514+201950 85 S >>>> 49044 21 066A 4353 G 20210723211226220 15 75 1924362+193590 85 S >>>> 49044 21 066A 4353 G 20210723211148021 56 75 1520205+266902 16 S >>>> 49044 21 066A 4353 G 20210723211148261 56 75 1521444+267172 16 S >>>> 49044 21 066A 4353 G 20210723211149021 56 75 1526160+268539 16 S >>>> 49044 21 066A 4353 G 20210723211149100 56 75 1526431+268496 16 S >>>> 49044 21 066A 4353 G 20210723211209901 56 75 1747579+256360 16 S >>>> >>>> ----------------------------------------------------------------------------- >>>> >>>> WATEC 902H2 Supreme + Zeiss 1.4/35 mm + GPS time inserter + TANGRA >>>> software* >>>> What these numbers mean: http://www.satobs.org/position/IODformat.html >>>> ----------------------------------------------------------------------------- >>>> >>>> * AstroRecord used instead for several points >>>> >>>> >>>> Tangra, the software I normally use for my video astrometry had >>>> trouble fitting >>>> to such a bright object, so most of the points above were obtained >>>> from short >>>> video stacks which I measured manually using AstroRecord, the software I >>>> normally use for measuring photographs. residuals with respect to the >>>> last >>>> available orbit from Space-Track, orbit 21205.20509545, are fine: rms >>>> 0.021 deg. >>>> >>>> - Marco >>>> >>>> >>>> ----- >>>> Dr Marco Langbroek - SatTrackCam Leiden, the Netherlands. >>>> e-mail: sattrackcam_at_langbroek.org >>>> >>>> Cospar 4353 (Leiden): 52.15412 N, 4.49081 E (WGS84), +0 m ASL >>>> Cospar 4355 (Cronesteyn): 52.13878 N, 4.49937 E (WGS84), -2 m ASL >>>> 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-l >> _______________________________________________ >> 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 Sun Jul 25 2021 - 13:27:15 UTC
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