Object: Constellation: Coordinates: Size: Brightness:
Messier 42
(= NGC 1976)
Ori 05h35m / -0524' 85' x 60' 4.0mag
Messier 43
(= NGC 1982)
Ori 05h36m / -0516' 20' x 15' 9.0mag

The famous "Orion Nebula" (also known as Messier 42 & Messier 43) in the constellation of Orion on February 25 / 26, 2014. The diffuse nebula (Messier 42 in the lower part of the image, Messier 43 in the upper part) is a region of star formation. It is 1344 light years from Earth and measures 24 light years across. It is visible to the naked eye. (source: Wikipedia).

Fifteen exposures of approximately 3 minutes, 10 exposures of approximately 60 seconds and 8 exposures of approximately 15 seconds, all at ISO 400, were added separately with the DeepSkyStacker software and then the three resulting files were added in Photoshop (theoretically resulting in a 63 minute exposure, but due to the masking work the effective exposure time is shorter).
Equipment: Canon EOS 450Da camera, TeleVue ParaCorr Type II coma corrector, 16" f/4.5 dobsonian telescope "Ninja" riding on a dual-axis Tom Osypowski equatorial platform, Lacerta MGEN autoguider, Lacerta off axis system (field of view comparison: image of the moon with the same equipment).

Search chart for M 42. Map © 2014 "The Mag-7 Star Atlas Project", www.siaris.net. Map is slightly modified. The map can be downloaded here .