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Horsehead Nebula

Classification: Dark Nebula / B33 / LDN1630
Constellation: Orion (ORI)
Object Location: Ra 05h 41m 45s Dec -02° 26’15” (current)
Size & Distance: 60 x 60 Apx 1500 light years

Date & Location: 10-16-2009 Little Blair Valley, CA
Exposure: Ha 6 @ 20min (bin 1x1)
Optics: Telescope ETelescope Engineering Company APO 140ED f/7 980mm / FLI-DF-2 focuser.
Mount: Astro-Physics 900 GTO / ATS 10x36 pier
Camera: SBIG-ST10XME @-15c Guided by Tak FSQ-85 SBIG-RGH
Filters: Astrodon 3nm Ha
Software: MaxImDL 4.56, Photoshop CS

Notes: Sky conditions: Good seeing, Light wind, Temp 60°
Image Field of view is 35 x 52 arc-min.

The Horsehead Nebula (also known as Barnard 33) in emission nebula IC434 is a dark nebula in the constellation Orion. The nebula is located just to the south of the star Alnitak, which is farthest east on Orion's Belt, and is part of the much larger Orion Molecular Cloud Complex. The nebula was first recorded in 1888 by Scottish astronomer Williamina Fleming. It is one of the most identifiable nebulae because of the shape of its swirling cloud of dark dust and gases, which bears some resemblance to a horse's head.