Telescope: Astro-Physics 160 EDF	Description: Sh2-308, also designated as Sharpless 308, RCW 11, or LBN 1052, is an H II region located near the center of the constellation Canis Major and is composed of ionised hydrogen. It is about 8 degrees south of Sirius, the brightest star in the night sky. The nebula is bubble-like (hence its common name, the Cosmic Bubble), surrounding a Wolf–Rayet star named EZ Canis Majoris. This star is in the brief, pre-supernova phase of its stellar evolution. The nebula is about 4,530 light-years away from Earth, but some sources indicate that both the star and the nebula are up to 5,870 ly away. Yet others indicate the nebula is as close as 1,875 ly from Earth.
Mount: Astro-Physics AP1600 GTO	Constellation: Canis Major the Big Dog
Camera: SBIG STX 16803 with Astrodon Ver. 2 Filters	Remotely Imaged With CCD Commander.
Guiding:SBIG ST402 Guider	Type: Emission Nebula
Exposure Data: 12 hours Ha.	Position: R.A. 06h 54m 13s Dec -23° 55' 42"
Processed using Maxim data aquisition, PixInsight and PhotoShop image processing	Date: February 2021
Data Acquisiton, Reduction and Processing by Jim Janusz	Imaging Location: Cave Creek Canyon Observatory