Some Molniya optical magnitude measurements

From: Ed Cannon (ecannon@mail.utexas.edu)
Date: Sat Dec 16 2000 - 01:09:21 PST

  • Next message: Russell: "DEC14-15.OBS"

    There was one even earlier version of one of those papers 
    about Molniyas that had some discussion and empirical data 
    about their optical magnitudes.  It's from this paper 
    (which I think was written in 1996):
    
    http://www.rmc.ca/academic/csr/public_html/links/molniya/reports/casi-01a.html
    
    > MOLNIYA OPTICAL MAGNITUDES
    > 
    > It is difficult to quantify satellite optical magnitudes. 
    > Radar cross-section data is available for most objects in 
    > the satellite catalog, but an equivalent optical magnitude 
    > database does not exist. In addition, apparent magnitude 
    > for any given satellite at any given location is highly 
    > variable, depending on solar aspect angle, viewing aspect 
    > and seeing conditions.  Based on actually observations made 
    > by UVic, visual magnitudes were calculated for 12 Molniya 
    > satellites observed near their apogee point at a slant 
    > range of approximately 40,000 km (Table 2). Additional work 
    > is being done to obtain similar data for Molniyas at a 
    > range of 20,000 km.
    > 
    > Table 2 Molniya Optical Magnitudes
    > 
    > Molniya (SSC #)  Magnitude  Uncertainty
    >  7780              13.29       0.62
    >  8015              13.68       0.71
    >  9829              17.94       1.11
    >  9941              12.74       0.57
    >  9941 (2nd obs)    12.78       0.51
    > 12915              12.71       0.48
    > 13070              13.27       0.51
    > 13070 (2nd obs)    13.73       0.49
    > 16220              12.31       0.56
    > 16220 (2nd obs)    12.30       0.51
    > 19730              12.35       0.44
    > 19730 (2nd obs)    12.73       0.46
    
    Ed Cannon - ecannon@mail.utexas.edu - Austin, Texas, USA
    
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