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Photographer:

Bob Franke

Email:

bfranke@bf-astro.com

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.

Website:

http://bf-astro.com/

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