Hemisphere:  Northern  ·  Constellation: Monoceros (Mon)  ·  Contains:  12 Mon  ·  Monoceros  ·  NGC 2239  ·  NGC 2244  ·  NGC 2252  ·  NGC2237  ·  NGC2238  ·  NGC2239  ·  NGC2244  ·  NGC2246  ·  NGC2252  ·  Rosette nebula  ·  Sh2-275  ·  The star 12Mon
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NGC 2244 Rosette Nebula, 


            Gebhard Maurer
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NGC 2244 Rosette Nebula

Technical card

Imaging telescopes or lenses: Skywatcher Esprit 80ED APO Triplet

Imaging cameras: Canon EOS 600Da

Mounts: Skywatcher NEQ6 Pro

Guiding telescopes or lenses: Lacerta MGEN2-Autoguider with 9x50 Finder Scope

Software: PixInsight PixInsinght 1.8

Filters: L-Pro 2"

Dates:Dec. 6, 2019

Frames:L-Pro 2": 39x300" ISO800

Integration: 3.2 hours

Darks: ~22

Flats: ~67

Bias: ~53

Avg. Moon age: 9.35 days

Avg. Moon phase: 70.28%

Bortle Dark-Sky Scale: 4.00

Mean FWHM: 2.00

Temperature: 10.00

Astrometry.net job: 3289455

RA center: 6h 32' 3"

DEC center: +5° 0' 24"

Pixel scale: 2.157 arcsec/pixel

Orientation: -93.665 degrees

Field radius: 1.876 degrees

Resolution: 5202x3464

Locations: Backyard, Raglitz, Niederösterreich, Austria

Data source: Traveller


This is my first try on the Rosette Nebula from my backyard using the Optlong L-Pro filter.
The NGC 2244 (also known as Caldwell 50) is an open cluster in the Rosette Nebula, which is located in the constellation Monoceros. This cluster has several O-type stars, super hot stars that generate large amounts of radiation and stellar wind.
The age of this cluster has been estimated to be less than 5 million years. The brightest star in the cluster is 12 Monocerotis, a foreground K-class giant. The two brightest members of the cluster are HD 46223 of spectral class O4V, 400,000 times brighter than the Sun, and approximately 50 times more massive, and HD 46150, whose spectral type is O5V, has a luminosity 450,000 time larger than that of our star, and is up to 60 times more massive, but it may actually be a double star.


Sky plot

Sky plot


NGC 2244 Rosette Nebula, 


            Gebhard Maurer