RE: Essaim 3 E24 discovered by Kevin Fetter

From: Ted Molczan (ssl3molcz@rogers.com)
Date: Wed Feb 06 2013 - 06:58:38 UTC

  • Next message: C. Bassa: "Re: Essaim 3 E24 discovered by Kevin Fetter"

    I found another pair of observations that Kevin made a little over a year ago:
    
    http://satobs.org/seesat/Jan-2012/0336.html
    
    As with his latest sighting, its flashing caught his eye.
    
    Here is the complete set of observations:
    
    28496 04 049E   1775 G 20120128111830972 15 25 1459238-115911 37 S
    28496 04 049E   1775 G 20120128111832627 15 25 1458470-122862 37 S
    28496 04 049E   0433 F 20120713174806650 55 15 1307007+244228 19
    28496 04 049E   0433 F 20120713174816796 55 15 1305495+265204 19
    28496 04 049E   0433 F 20120713174821854 55 15 1305103+275252 19
    28496 04 049E   0433 F 20120713174831916 55 15 1304041+294626 19
    28496 04 049E   1775 G 20130204231055019 15 25 0743345+295482 37 S
    28496 04 049E   1775 G 20130204231129519 15 25 0822907+424547 37 S
    28496 04 049E   1775 G 20130204231157246 15 25 0907915+514499 37 S
    
    I found a combination of mean motion and rate of decay that reasonably fits the entire span, then fixed those values and
    adjusted mean anomaly, RAAN and argument of perigee to best fit the most recent observations: 
    
    Essaim 3                                                 612 X 625 km
    1 28496U 04049E   13035.95734877  .00000925  00000-0  11500-3 0    07
    2 28496  98.3586  65.3137 0009522 317.6116  42.4359 14.82578806    04
    Arc 20130204.97-0204.97 WRMS resid 0.010 totl 0.008 xtrk
    
    Predictions should be reasonably accurate, but it would be prudent to allow one or two minutes time uncertainty per 24 h
    since epoch.
    
    Ted Molczan
    
    
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