Re: forwarded moon transit movie

From: Jonathan T Wojack (
Date: Fri Jan 26 2001 - 16:13:53 PST

  • Next message: Kevin Fetter: "Re: Solar/lunar transits"

    > > way, at 3.85 km range it's 7 centimeters in diameter ... I
    > > think! -- hummingbird or other very small bird size.)
    > >
    > So, if the Moon (or Sun) was 30 degrees above the horizon, the small 
    > bird
    > would be flying at 1.9 km above your own elevation - how many small 
    > birds
    > do?
    At 10 degrees elevation, this is 668.5 meters in altitude.  At 45
    degrees, 2.72 km in altitude, and at 60 degrees, 3.33 km.  I think these
    altitudes are too high for a small bird.  What about a larger bird?  I
    don't remember how to calculate the inverse square law in reverse (at
    least I think that's the right mathematical route to take).
    Jonathan T. Wojack       
    39.706d N   75.683d W  
    5 hours behind UT (-5)
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    This archive was generated by hypermail 2b29 : Fri Jan 26 2001 - 16:42:12 PST