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M42: Orion Nebula

RA = 5 hrs 25 min; Dec = -5 deg 23 min.

Date & Site:

Imaged on 11/19/2014; Runningman Observatory, Carlsbad, CA

Conditions: calm; 54 degrees; very good seeing


Telescope: Takahashi FSQ 106 (540mm at f/5)

Mount: Losmandy G-11 Gemini
Camera: ST-10XME; CFW10; 80mm refractor guidescope


Exposures: 80 min each (10 min subs) for Ha and OIII, plus another 10 min of Ha (2 min subs) for total of 170 minutes.

Color mapped by assigning Ha to red; OIII to blue and combining Ha/OIII for a green channel. Final OIII layer added as luminance to enhance the OIII/Ha contrasts.

From Wiki: The Orion Nebula is one of the most scrutinized and photographed objects in the night sky, and is among the most intensely studied celestial features.The nebula has revealed much about the process of how stars and planetary systems are formed from collapsing clouds of gas and dust. Astronomers have directly observed protoplanetary disks, brown drawrfs, intense and turbulent motions of the gas, and the photo-ionizing effects (on hydrogen and oxygen) of massive nearby stars in the nebula.

FOV =62.4 x 65.6 arc minutes

1,325 light years away

Click below for links to other images of M42 from backyard observatory:

December 20, 2011

December 20, 2012

December 29, 2013


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