XSS-11 and Geosat F0 (Re: Search elements of suspected Helios 2B-related UNID)

From: Patrick Schmeer (pasc1312-seesat@yahoo.de)
Date: Sun Aug 29 2010 - 21:00:07 UTC

  • Next message: satrack@libero.it: "New Program Available - Download Open"

    Ted,
     
    Thanks a lot for your detailed reply.
     
    Yes, I would be very interested in search
    orbits for Geosat FO (98007A / 25157) and
    XSS-11 (05011A / 28636). And could you
    please provide the last known TLE sets for
    both satellites?
    
    There had been some speculation about a
    Misty 3 payload. Was that project cancelled?
     
    Regards,
    Patrick
    
    
    --- Ted Molczan <ssl3molcz@rogers.com> wrote:
    
    > Patrick Schmeer asked:
    > 
    > > > Are there any other bright satellites in
    > > > sun-synchronous orbits that are missing?
    > 
    > Helios 2B (09073A / 36124) remains to be found,
    > but that is only a matter of time.
    > 
    > > Or, more generally asked, which missing/lost
    > > classified satellites may be still in orbit
    > > (LEO in particular)?
    > 
    > A small number of LEO objects are missing or
    > lost, mainly because they are faint.
    > 
    > Marco Langbroek pointed out that Misty 2
    > (99028A / 25744) may still be in orbit. Even Misty 1
    > (90019B / 20516) could still be in orbit. Those are
    > intentionally faint, and have been (mostly) successful
    > at eluding our detection.
    > 
    > We lost track of Geosat FO (98007A / 25157) and XSS-11
    > (05011A / 28636) after they manoeuvred into long-term
    > disposal orbits (lowered perigee). They are not
    > extremely faint, and we have sufficient data to
    > construct reasonable search orbits, so I suspect they
    > could be found with some effort. Eventually, they will
    > be spotted as UNIDs. (When UNIDs are reported, we
    > check for consistency with the plane of missing/lost
    > objects.)
    > 
    > A couple of small, faint, ferrets launched with KH-9
    > satellites, 80052C / 11852 and 83060C / 14139, have
    > not been seen since 2007.
    > 
    > A couple of NOSS plume shields that served as payloads,
    > are in orbit. They are known as LIPS (Living Plume
    > Shield). Lips 2 (83008B / 13792) has not been reported
    > since the late 1980's. Lips 3 (87043B/ 17998) was
    > observed during 1999-2000. They are faint.
    > 
    > To my knowledge, hobbyists have never (knowingly)
    > observed the three small payloads of the 90031A /
    > 20560 launch; the rocket body was observed during
    > 1999-2001.
    > 
    > Those are the ones that come to mind immediately.
    > 
    > Ted Molczan
    > 
    > _______________________________________________
    > Seesat-l mailing list
    > http://mailman.satobs.org/mailman/listinfo/seesat-l
    
    
    
    _______________________________________________
    Seesat-l mailing list
    http://mailman.satobs.org/mailman/listinfo/seesat-l
    



    This archive was generated by hypermail 2b29 : Sun Aug 29 2010 - 21:01:17 UTC