Explorer 7 - SpaceCom's black magic

From: Harro.Zimmer (Harro.Zimmer@t-online.de)
Date: Thu Apr 27 2000 - 12:29:41 PDT

  • Next message: Cees: "Apollo Flight Plan"

    As Alan mentioned in his April 26 DECAY WATCH SpaceCom has issued a decay
    prediction for 1959-009A (#00022) Explorer 7 prepared on 20 February 2088 (!) :
    
     The decay date:  27 February 2088 01:22 UTC +/- 02 minutes (27.2S, 0.1E)
    You can see this stuff with frequently updated ELSET's also today on the TIP
    message board via OIG.
     The old satellite is in a stable orbit - 519.29 / 827.458 km - with i = 50.3.
    The lifetime estimates in the early sixties gave Explorer 7 about 50 years.
    
    With a special long range prediction program here is a calculation of a more 
    precise decay date:         April 10, 2011 +/- 06 months 
    I have assume a "normal" behavior of the solar activity over the next decade.
    This time frame looks quite more realistic then SpaceCom's black magic.
    
    Harro
    
    Harro.Zimmer@t-online.de
    Berlin, Germany
     
    
    -----------------------------------------------------------------
    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
    



    This archive was generated by hypermail 2b29 : Thu Apr 27 2000 - 12:30:43 PDT