NGC 1501, also called the Oyster Nebula, is a planetary nebula visible in the constellation of the Giraffe, about four thousand light years away from the solar system.
The nebula has the form of an ellipsoid of low eccentricity: it has magnitude 13.3 and an apparent diameter of 52 ".
Optic Celestron C9.25 Edge HD f/10
Mount Losmandy G11 with Ovision worm and FS2
Camera Atik 4000 with Starlight Xpress filter wheel 5 positions
Filters Baader Ha 7nm and OIII 8.5nm, 50.8 unmounted
Guiding system OAG LB Astro Proxima and Lodestar
Exposure details Ha 13x600" bin1 -20C
OIII 17x600" bin1 -20C
Total integration 5h
Acquisition Maxim, PHD2
Processing Maxim, Photoshop CS5
Location Home terrace (Rescaldina, Italy)
Date 12 November 2013