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M42 - Orion Nebula

RA = 5 hrs 35 min; Dec = -5 deg 23 min

Date & Site:

Imaged on 12/29/13; Runningman Observatory, Carlsbad, CA

Clear; very good seeing; very good transparency

Temperatures in low 50s


Telescope: Takahashi FSQ 106 (530mm f/5)

Mount: Losmandy G-11 with Gemini
Camera: ST-10XME; CFW10 with 3 nm Astrodon filters;

100mm guidescope


Exposures: 60 minutes each (6 x 10 min subexposures) through Ha, OIII and SII filters for a total of 3 hours.

False color assignments: Ha = red; SII = green and OIII = blue

M42 is one of the brightest nebula. It is visible to the naked eye on a sharp clear night. Located at a distance of about 1,300 light years it is the closest region of massive star formation to earth. The nebula is estimated to be 24 light years across. Astronomers have directly observed protoplanetary disks, brown dwarfs, and intense and turbulent motions of the gas thought to be caused by the photo-ionizing effects of massive nearby stars

FOV = 53 x 52 arc minutes

1,300 light years away

Cropped and reduced 12% from original

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