Horsehead Nebula

Horsehead Nebula (Bernard 33) in Orion

Technical Details Telescope: FSQ-106 Mount: MI-250 Camera: SBIG ST-10XME Filters: Astrodon LRGB Dates: February 4,8, 2008 Exposure: LRGB: L=24x2.5min, RGB=2.5min each, 32B, 23G, 28R for 267.5 minutes (4.6 hours) total at -25C Notes: The red emission nebula is known as IC 434.  The Horsehead nebula is Bernard 33 (B33) and is a dark nebula, that is, dust in the foreground, blocking the red emission nebula in the background.  The blue halos around the bright stars are reflections inside the telescope.  The white near the bottom center is a magnitude 2.0 star just off the picture - it is easily visible to the naked eye and would make a mess of the picture, so I put it off the edge.  This nebula is about 1,500 light years away.