This is Sharpless 2-304, a very faint emission nebula in the constellation of Canis Major. It is located just below the bright star Sirius. It was exposed for 270 minutes in hydrogen-alpha light, and for one hour with color filters. The telescope used was a Takahashi FSQ-106, and the camera was a SBIG STL11000 CCD camera. Click on the image to see it at a larger scale. This image was taken over 2 nights, February 18th and March 17th, 2009.