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
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