w1800 20161228 M42 A7Ra ISO3200 14x30s

The Orion Nebula (also known as Messier 42, M42, or NGC 1976) is a diffuse nebula situated in the Milky Way, being south of Orion's Belt in the constellation of Orion. It is one of the brightest nebulae, and is visible to the naked eye in the night sky. M42 is located at a distance of 1,344 ± 20 light years and is the closest region of massive star formation to Earth. The M42 nebula is estimated to be 24 light years across. It has a mass of about 2000 times the mass of the Sun. Older texts frequently refer to the Orion Nebula as the Great Nebula in Orion or the Great Orion Nebula.
NGC 1973/5/7 is a reflection nebula 1/2 degree northeast of the Orion Nebula. The three NGC objects are divided by darker regions. It is also called The Running Man Nebula and Sharpless Catalog 279.

ObjectM42/M43 - Orion Nebula
incl. NGC1973
Constellation: Orion
Position: RA 5h 35,3m DEC −5° 23,5′
Apparent Size: 60 arcmin
Apparent Magnitude: +4.0
Distance (average) 1350 ± 23 ly
Photo Datas 
Date 28.12.2016, 21:05 UTC
Location Knottenried/Oberallgäu, 1002m ASL
GPS: 47°36’13“ N, 10°11’24“ E
Sky darkness SQM-L Zenit 20.8mag/sqrsec, Object 20.5mag/sqrsec
Ground Temp./Air Pressure -6.0°C / mbar
Thermal sky temp./weather  > -60°C Zenit
Seeing (Bortle)  
Telescope Canon f/2.8 EF 300mm IS USM I
Camera Sony A7Ra mod @ T sensor= -2.0°C
Expose frames ISO 3200, RAW 14x30s + 1x2s, 5 darks
Total expose
7 min
Filter CLS CCD
Mount FS2
Guiding Cam no
Software DSS 3.3.4, Photoshop CC

C 2016 Peter Cerveny