Photographer:
Bob Franke
Location of Photo:
Chino Valley, AZ
Date/Time of photo:
4/30/2014 to 6/20/2014
Equipment:
Takahashi FSQ-106ED scope, Losmandy G11 mount, SBIG STF-8300M camera, Baader LRGB filters. Total exposure = 27.75 hrs.
Description:
Sh2-73 is located in the constellation Hercules and was mistakenly included in the Sharpless catalog as an emission nebula. We now know that the nebula is simply a molecular cloud. With its relatively high galactic latitude, about 45°, the integrated light of the galaxy illuminates the nebula. Therefore, we can refer to Sh2-73 as an integrated flux nebula, as defined by Steve Mandel.
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