Open Cluster M39

NOTES
DATE:
Saturday, August 3 - Sunday, August 4, 2013
TIME:
10:24 pm - 12:15 am EDT
CAMERA:
Canon 550D
EXPOSURE:
45 minutes (15 x 3 minutes @ ISO 1600)
LOCATION:
Richland Township Park (Kalamazoo County, Michigan)
TELESCOPE:
Astro-Tech 8" f/4 Imaging Newtonian (with Baader Coma Corrector)
MOUNT: Celestron CGEM Computerized Mount
GUIDING: Orion 70mm Refractor and Orion StarShoot AutoGuider
PROCESSING:
Preprocessed, aligned, stacked, bias, and flat fields subtracted with Nebulosity 2.  Further processing done with Adobe Photoshop CS3 (using Noel Carboni's Astronomy Tools) and Noise Ninja 2.
COMMENTS:
M39 is an open cluster located in the constellation Cygnus, about 9 east-northeast of Deneb. It contains only about 30 stars, but (as seen above) is located in a rich patch of stars in the Milky Way. M39 is about 1,010 light-years from Earth and about 9 light-years in diameter. Astronomers estimate it is between 240 - 280 million years old.