Re: Standard Magnitude Calculation

From: Ralph McConahy (
Date: Wed Oct 15 2008 - 00:27:26 UTC

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    Bjoern Gimle wrote:
    >> so it confirms what I believed - SkyMap uses 90 d for STD MAG definition
    Just to confirm that, Rob's file reads:
      The "standard" visual magnitude is an approximation of
      each satellite's expected visual magnitude when seen at
      1000-km range with a 90-degree phase angle (angle from 
      observer to satellite to sun).
    [The same text appears in previous versions sky63, sky64, &] 
      Ralph McConahy
      38.3306N, 75.6970W, -25m (WGS84)
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