Re: Nauka orbit not updated for over a day (SATOBS ML (4353) VIDEO, 23 Jul 2021: Nauka)

From: Nico Janssen via Seesat-l <seesat-l_at_satobs.org>
Date: Sun, 25 Jul 2021 14:21:11 +0200
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
>> -----
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Received on Sun Jul 25 2021 - 07:22:17 UTC

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