21147 91 017A 2701 G 20021006095519270 17 25 0913951+612919 97 S 21147 91 017A 2701 G 20021006095604350 17 25 1137557+623348 28 S 21147 91 017A 2701 G 20021006095643850 17 25 1252920+585362 87 S 25744 99 028A 2701 G 20021006100815970 17 25 0910064+601151 57 R 25744 99 028A 2701 G 20021006101111660 17 25 1115441+604731 37 R 25744 99 028A 2701 G 20021006101218890 17 25 1154647+592375 18 R There is some inconsistency among my timings of 91017A. Elements for the arc 2002 Sep 04 - Oct 06 UTC: USA 144 0.0 0.0 0.0 3.6 v 17.7 1 25744U 99028A 02279.40486400 .00000030 00000-0 47004-2 0 09 2 25744 63.4358 61.6131 0236622 292.8607 64.7561 9.69783300 00 WRMS error = 0.01 deg During the above arc, the orbit has been constantly in sunlight; therefore, the effects of SRP (Solar Radiation Pressure) on mean motion should have cancelled out. The small non-zero rate of decay may be due to a combination of atmospheric drag and asymmetry of the SRP during each revolution. During 2002 Oct 07 - Dec 15, the orbit will be in partial eclipse, and the object will lose energy due to SRP; ndot/2 is predicted to peak near 0.00000095 rev/d^2 about mid-way through this period. The significance of 99028A's SRP effects was discussed in the thread that began with the following message: http://satobs.org/seesat/Aug-2002/0045.html Ted Molczan ----------------------------------------------------------------- Unsubscribe from SeeSat-L by sending a message with 'unsubscribe' in the SUBJECT to SeeSat-L-request@lists.satellite.eu.org http://www.satellite.eu.org/seesat/seesatindex.html
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