Re: Cosmos 1220 - FYI

From: Rik Hill (rhill@LPL.Arizona.EDU)
Date: Fri May 18 2001 - 11:31:40 PDT

  • Next message: Anthony Ayiomamitis: "Re: Cosmos 1220 - FYI"

    I wasn't being critical of Heavens-Above. It must be a huge task
    tracking all that and making sure all the orbital elements are 
    in order each day. I guess underestimating is better than over.
    
    -Rik
    
    > 
    > Join the club. This is something which I also have observed (excuse the
    > pun) with a trend by H-A to underestimate magnitude. I had yet another
    > example of this just the other night with an Iridium flare. To make
    > matters worse, a flare a few minutes later by another Iridium satellite
    > (-6.4 magnitude!) was completely missed by H-A but nicely picked up by
    > Rob Matson's IRIDFLAR. For the latter satellite, it was just coming out
    > of the earth's shadow but there certainly was lots of visible time
    > after that anyway to make it a definite reportable pass.
    > 
    > At this point I simply use H-A to get a general picture of what may be
    > available and then proceed with Rob's SKYMAP and/or IRIDFLAR to confirm
    > and fine-tune.
    > 
    
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