At 05:41 24/08/00 , Matson, Robert wrote: >Hi All, > >Was cleaning up my decayed satellite list and noticed two >entries which don't jive with the current ALLDAT.TLE file. >I show both as long decayed, but apparently they were both >resurrected at some point: > >00879 64-054A OGO 1 (dec 8/10/1980) Rob, The RAE table of Earth satellites lists the initial orbit of this object as period 3838min period, inclination 31.15 degrees, apogee 149385, perigee 281. By 1970 the inclination had risen to 58.8 degrees and the perigee to 45880Km with only a small change in the period ( 3840.1 minutes). Such changes are induced by solar and lunar pertubations. Similar large changes in inclination show up in the orbital history of ASTRON1, 1983020A (#13901). A footnote in the RAE tables states that this perigee height oscillations have a 16 year period, and in august 1980 the perigee will be down to 390Km. It looks like SPACECOM lost it that point, and assumed it had decayed, and recovered it more recently, or perhaps they are now tracking the upper stage rocket( which doesnt appear to be catalogued), instead which has a larger surface area (9 sq. metres) rather than the the approx. 1.4 sq meters of the satellite. The orbit currently has a perigee height of 28738Km and a period of 3810 minutes. It could of course be some other piece of junk wandering around cislunar space. I dont know if anybody has kept track of where Clementine is for example. Latest set from OIG OGO 1 Decayed: 1980/08/10 No current elements 1 00879U 64054A 00236.66666667 +.00000000 +00000-0 +00000-0 0 00286 2 00879 045.7240 136.7222 5654615 026.2363 355.0155 00.37792950002463 Cheers Tony Beresford ----------------------------------------------------------------- Unsubscribe from SeeSat-L by sending a message with 'unsubscribe' in the SUBJECT to SeeSat-L-request@lists.satellite.eu.org http://www2.satellite.eu.org/seesat/seesatindex.html
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