Ted, I can confirm that USA 245 raised its orbit. I don't have enough data yet to reliably determine new TLEs. But from what I have I think that I see a mean motion near 14.74 rev/day. NJ On 28-08-2021 16:01, Ted Molczan via Seesat-l wrote: > USA 245 (13043A / 39232) was last observed by Russell Eberst, on 2021 Aug 23 at 20:45 UTC. > > Cees Bassa reported a non-sighting on 2021 Aug 27 at 20:16 UTC. > > Based on its mean motion, 13043A seemed due for a reboost. Based on data on historical manoeuvres, that I have NOT updated since 2013, a reboost was most likely to have been made on Aug 26, and less likely on Aug 25. The likeliest time span would have been between about 08:00 UTC and 19:00 UTC. The post manoeuvre mean motion would have been between about 14.74 rev/d and 14.81 rev/d. I offer the following search elements based on these criteria, which are derived from the latest TLE issued by Mike McCants. The epochs correspond to passage through perigee. > > Aug 25 earliest manoeuvre > 264 X 982 km > 1 79001U 79001A 21237.34986111 .00011500 00000-0 11734-3 0 01 > 2 79001 97.8709 299.3707 0512600 63.3881 0.9181 14.81000000 02 > 264 X 1026 km > 1 79002U 79002A 21237.34986112 .00011500 00000-0 11734-3 0 04 > 2 79002 97.8709 299.3707 0542500 63.3881 0.9181 14.74000000 07 > > Aug 25 latest manoeuvre > 264 X 982 km > 1 79003U 79003A 21237.75440972 .00011500 00000-0 11734-3 0 00 > 2 79003 97.8709 299.7711 0512600 62.0622 0.9237 14.81000000 04 > 264 X 1026 km > 1 79004U 79004A 21237.75440973 .00011500 00000-0 11734-3 0 03 > 2 79004 97.8709 299.7711 0542500 62.0622 0.9237 14.74000000 09 > > Aug 26 earliest manoeuvre > 264 X 982 km > 1 79005U 79005A 21238.36123843 .00011500 00000-0 11734-3 0 07 > 2 79005 97.8709 300.3718 0512600 60.0733 0.9885 14.81000000 02 > 264 X 1026 km > 1 79006U 79006A 21238.36123844 .00011500 00000-0 11734-3 0 00 > 2 79006 97.8709 300.3718 0542500 60.0733 0.9885 14.74000000 07 > > Aug 26 latest manoeuvre > 264 X 982 km > 1 79007U 79007A 21238.76521991 .00011500 00000-0 11734-3 0 01 > 2 79007 97.8709 300.7717 0512600 58.7493 358.0000 14.81000000 00 > 264 X 1026 km > 1 79008U 79008A 21238.76521992 .00011500 00000-0 11734-3 0 04 > 2 79008 97.8709 300.7717 0542500 58.7493 358.0000 14.74000000 05 > > It is my hope that the above will help to reduce the observation time required to recover the object. > > 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-lReceived on Sat Aug 28 2021 - 09:18:59 UTC
This archive was generated by hypermail 2.4.0 : Sat Aug 28 2021 - 14:18:59 UTC