IGS 5A related elements

From: Ted Molczan (ssl3molcz@rogers.com)
Date: Mon Mar 15 2010 - 03:00:29 UTC

  • Next message: Russell Eberst: "2010MAR14.OBS"

    Russell Eberst's observations of Mar 02 at 20:36:08.6, Mar 10 at
    20:53:26.48, Mar 12 at 20:56:26.21, and Mar 13 at 20:58:25.44 (all UTC),
    appear to be of 09066B. The following elements are a close fit:
    
    IGS 5A r                                                 538 X 598 km
    1 36105U 09066B   10072.86172539  .00000803  00000-0  65603-4 0    05
    2 36105  97.6507 144.6866 0043019  43.1528 317.3053 14.98708889    00
    Arc 20100302.86-0313.87 WRMS resid 0.005 totl 0.005 xtrk
    
    Forcing the eccentricity to more closely match that of previous IGS rockets
    yields:
    
    IGS 5A r                                                 521 X 615 km
    1 36105U 09066B   10072.86181625  .00001460  00000-0  11587-3 0    02
    2 36105  97.6497 144.2789 0068000  61.4153 299.3890 14.98711240    05
    Arc 20100302.86-0313.87 WRMS resid 0.058 totl 0.027 xtrk
    
    Russell's observation of Mar 10 at 19:55:58.1 UTC, may be of 09066A. The
    following approximate elements are based on my guess that the orbit repeats
    its ground-track daily:
    
    IGS 5A                                                   560 X 562 km
    1 70001U          10069.81802421  .00000000  00000-0  00000-0 0    03
    2 70001  97.6507 141.8594 0002000   0.0000   0.1234 15.00937000    03
    
    This would be a departure from past IGS orbits, which were ~97.4 deg and 485
    km high, and repeated their ground-track every 4 days.
    
    Ted Molczan
    
    _______________________________________________
    Seesat-l mailing list
    http://mailman.satobs.org/mailman/listinfo/seesat-l
    



    This archive was generated by hypermail 2b29 : Mon Mar 15 2010 - 03:01:38 UTC