M37 - Open Cluster

I finished off the open clusters in Auriga last week with this image of Messier 37 (M37 or NGC 2099).  It is the brightest of three open clusters in Auriga and was discovered by the Italian astronomer Giovanni Battista Hodierna before 1654. Charles Messier independently rediscovered M37 in September 1764.  Its age is estimated anywhere between 347 million to 550 million years and is around 4,500 light-years from Earth. The diameter is about 20–25 ly.  Also, M37 has at least a dozen red giants and its hottest surviving main sequence star has an elemental abundance that is similar to the Sun. (source: wikipedia)

This is my 50th Messier object I have captured (it's a psychological milestone).
Messier Objects with an ED80 or Messier Astro Pics by Kurt Zeppetello.

Close Up

Wide Field

Wide Field - Black and White

M37 (NGC 2099)
Location: Happy Frog Observatory, Monroe, CT
Date/Time: 12/09/16 11:45 pm
Camera: Canon EOS Rebel T3i(a), Backyard EOS
Telescope: Orion ED80 80mm f/7.5 Apochromatic Refractor Telescope
Barlow: None
Focal Length: 600mm
f/7.5
Mount: Orion Sirius EQ-G GoTo Telescope Mount
Filter: Astrodon UV/IR
Autoguiding: QHY-5L-II-M attached to an Agena 50mm Guide Scope with Helical Focuser
Exposure: 39 x 90 sec (58.5 min)
ISO: 800
Temp: 25 C
Post Processing: Deep Sky Stacker, Photoshop, Lightroom, StarTools, Astrophotography Tools