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Lowers Nebula: The constellation of Orion is one of the richest region in Deep Sky Objects of the sky. Apart from well known nebulae like the Great Orion and Horse Head Nebula there is a very faint nebulosity of glowing hydrogen gas (HII-region), which is rarely photographed. Its designation is Sharpless 261 (Sh2-261), but it is also sometimes called Lowers Nebula.

The image was taken at the IAS astronomical site at the Hakos farm in Namibia.

Object Lowers Nebula
Category IAS Hakos, Namibia
Designation Sh2-261
Constellation Orion
Optics Keller 20 inch Cassegrain f/3 in corrected primary focus
Mount Liebscher GEM
Camera SBIG STL-11000M with internal CFW 5
Exposure 3 x 10min H-alpha, 2 x 10min each RGB. Baader filterset. Maxim DL for image acquisition
Calibration Dark + Flat Frame
Guiding StarlightXpress Lodestar on Schneider OAG, Maxim DL as Guiding Software
Processing MaxIm DL5,Photoshop. Color Code L:H-alpha,R:H-alpha/R,G,B
Location-Date IAS-Hakos, Namibia - 11 Dec 2012
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