Home Index page Previous image Next image
Click to view the full size image:
2000 x 1333, 584 KB
NGC 2244 / Rosette Nebula

Classification: Nebula / Open cluster NGC2244 / NGC2237 LBN948 / Sh2-275 / C49
Constellation: Monoceros (MON)
Object Location: Ra 06h 31m 44s Dec +05° 02’00° (current)
Size & Distance: 80.0 x 80.0 Apx 5200 light years.

Date & Location: 02-5/6-2016 Little Blair Valley, CA.
Exposure: Hubble Palette SHO, Sll=R, Ha=G, Olll=B, 10ea. @ 15min. (bin 1x1)
Optics: Telescope Engineering Company APO110FL @ f/5.74 631mm.
Mount: Astro-Physics 1200 GTO / ATS 10x36 pier.
Camera: FLI-ML6303E @-30c / CFW2-7 / Guided by SBIG ST-I / w OAG.
Filters: Astrodon 50mm 3nm SII, Ha, OIII
Software: MaxImDL 6.11, Photoshop CS5, CCDStack, Topaz Labs.

Notes: Sky conditions: Average seeing, No wind, Temp 35°
Image Field of view is 100 x 151 arcmin.

The Rosette Nebula is a large, circular 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 is closely associated with the nebulosity, the stars of the cluster having been formed from the nebula's matter.

The cluster and nebula lie at a distance of some 5,200 light-years and measure roughly 130 light years in diameter. The radiation from the young stars excites the atoms in the nebula, causing them to emit radiation themselves producing the emission nebula we see.

The cluster of stars is visible in binoculars and quite well seen in small telescopes while the nebula itself is more difficult to spot visually and requires a telescope with a low magnification. A dark site is a must to see it. Photographically the Rosette Nebula is easier to record and it is the only way to record the red color which is not seen visually.