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RAC Observing Session (RACOBS)


January RACOBS Clouded Out - Great Indoor Meeting Instead! PDF Print E-mail
Written by Mike Keefe   
Saturday, 12 January 2013 10:16

The RACOBS for January 11th was clouded out, rather fogged out!  However about ten or so members showed up for a short presentation of Grazing Lunar Occultations by our own Mark Lang.

This was an incrediblely interesting presentation about a topic not often discussed in amatuer astronomy circles.  These grazing lunar occultations occur when the very edge of our moon passes in front of a star.  The result is that the mountainous terrain of the Moon causes the star to disappear and reappearing several times.  Because of the exacting geometery required for this to happen, a particular grazing lunar occultation can only be see from a very narrow path on earth.  In fact observers even 100 feet away from each other will have different views of the occultation.
Mark also shared some very informative links:
Mark also shared a video of a recent Grazing Lunar Occultation:
The planning process for observing a grazing lunar occulation is quite extensive and requires a far amount of time.  Maybe RAC can get together a bunch of observers and imagers to go after the next grazing lunar occultation in our area.
Last Updated on Sunday, 13 January 2013 20:17