w1800 20170101 NGC2237 A7Ra ISO3200 11x60sThe Rosette Nebula (also known as Caldwell 49) is a large, spherical (circular in appearance), H II region located near one end of a giant molecular cloud in the Monoceros region of the Milky Way Galaxy. The open cluster NGC 2244 (Caldwell 50) is closely associated with the nebulosity, the stars of the cluster having been formed from the nebula's matter.

ObjectNGC 2237 - Rosette Nebula
Constellation: Monoceros
Position: RA 06h 33m 45s DEC +04° 59′ 54″
Apparent Size: 1.3°
Apparent Magnitude: +9.0
Distance (average) 5200 ly
Photo Datas 
Date 01.01.2017, 21:01 UTC
Location Knottenried/Oberallgäu, 1002m ASL
GPS: 47°36’13“ N, 10°11’24“ E
Sky darkness SQM-L Zenit 21.12mag/sqrsec, Object 20.90 mag/sqrsec
Ground Temp./Air Pressure -5.0°C / 1028mbar
Thermal sky temp./weather  > -60°C Zenit, clear
Seeing (Bortle)  6/10
Telescope Canon EF 300mm f/2.8 L IS USM I
Camera Sony A7Ra mod @ T sensor=-1.0°C
Expose frames ISO 3200, RAW 11x60s, 5 darks, 5 flats
Total expose
11 min.
Filter CLS-CCD
Mount HPS 10Micron GM 3000
Guiding Cam no
Software DSS 3.3.4, Photoshop CC

C 2016 Peter Cerveny