Re: Your request on Seesat-l

Yes, I didn't include that last elset to you before because I'm a bit
worried from the source document
that it may be a software test case and not real data.
 - Jonathan

On 8 September 2016 at 13:57, Bill Gray via Seesat-l <seesat-l_at_satobs.org>
wrote:

> Hi Jari,
>
>    Thank you.  I had the third set of TLEs from that page,  via
> Jonathan,  for 1977 182 = 1977 July 1.  The fourth set,  "possibly
> sample",  for 74 days later,  might come in handy.
>
>    At this point,  I'm hoping the object gets observed again in a few
> days;  that will refine the orbit a bit,  to the point where it may
> conceivably appear in archives,  giving us still more data,  to the
> point where we can run the orbit back to 1977 and see which object
> it matches.  (Which is how we were able to identify SOLRAD 11A =
> 1976-023C last February.)  Keeping fingers crossed...
>
> -- Bill
>
> On 2016-09-07 16:17, Jari wrote:
>
>> Hi Bill,
>>
>> Jonathan McDowell has an archive with historical TLEs. Solrad 11b is at
>>
>> http://www.planet4589.org/space/elements/08700/S08749
>>
>> I _really_ should have remembered this yesterday. In 2007 I matched some
>> photos and
>> visual observations of Sputnik 1 booster using the archived TLE.
>>
>> Kind regards
>> Jari
>>
>>
>> -------- Original message --------
>> From: Bill Gray <pluto_at_projectpluto.com>
>> Date: 07/09/2016 20:19 (GMT+02:00)
>> To: Jari <jari_at_clayhole.com>, SeeSat-L_at_satobs.org
>> Subject: Re: Your request on Seesat-l
>>
>> On 2016-09-06 08:22, Jari wrote:
>>
>>> Hi Bill
>>>
>>> Have you tried your luck at CelesTrak? https://celestrak.com/NORAD/ar
>>> chives/request.asp
>>>
>>
>>      That looked like an excellent idea.  I gave it a try,  and got back
>> a "no TLEs available" message.  TLEs are rather spotty for high-fliers
>> in general,  and I wouldn't be surprised if they were still more so back
>> in the 1970s.
>>
>>      We've gotten a few more observations of the object.  The problem is
>> that the mean motion doesn't quite match either SOLRAD 11B or the
>> apogee kick motor.  I'll probably see if I can find some of the people
>> who worked on this mission forty years ago,  and see if they remember
>> anything about what SOLRAD 11B might have been doing near the end of
>> its working life in 1979.  A bit of a long shot,  I'm afraid.
>>
>> Thanks!            -- Bill
>>
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