Al Bustan 


IC5146 - Cocoon
M5 - NGC5904
M8 - Lagoon Nebula
M16 - Eagle Nebula
M20 - Trifid
M27 - Dumbbell
M31 - Andromeda
M33 - Pinwheel
M42 - Orion
M45 - The Pleiades
M51 - Whirlpool
M57 - Ring
M63 - Sunflower
M64 - Black-Eye
M65 - NGC3623
M67 - NGC2682
M98 - NGC4192
M99 - Pinwheel
M100 - NGC4321
M101 - NGC5457
M104 - Sombrero
M105 - NGC3379
M106 - NGC4258
C/2004 Q2 - Machholz
NGC 891
NGC2024 - Flame
NGC2244 - Rosette
NGC6960 - Veil
The Mice - NGC4676









(Credits to Anglo-Australian Observatory)

NGC 2244 and NGC 2237-9,46

Starforming Nebula NGC 2237-9,46, The Rosette Nebula
Open Cluster NGC 2244 (= H VII.2), type 'c', in Monoceros



Discovered by John Flamsteed about 1690.

The Rosetta Nebula is a vast cloud of dust and gas, extending over an area of more than 1 degree across, or about 5 times the area covered by the full moon. Its parts have been assigned different NGC numbers: 2237, 2238, 2239, and 2246. Within the nebula, open star cluster NGC 2244 is situated, consisted of the young stars which recently formed from the nebula's material, and the brightest of which make the nebula shine by exciting its atoms to emit radiation. Star formation is still in progress in this vast cloud of interstellar matter; a recent finding of a very young star with a Herbig-Haro type jet by astronomers at the NOAO has been announced in Press Release NOAO 04-03 on January 22, 2004.

Although various values for its distance occur in the literature, our adopted distance from the Sky Catalog 2000 implies a true diameter of the nebula of about 130 light years. Burnham quotes a mass estimation of 10,000 (Minkowski 1949) to 11,000 (Menon 1962) solar masses, so it is one of the more massive diffuse nebulae.

Open cluster NGC 2244 was discovered by Flamsteed about 1690. The nebula, however, was not even seen by William Herschel (who found the cluster); its different parts were discovered only by John Herschel (NGC 2239 = GC 1420 = h 392), Marth (NGC 2238 = GC 5361 = Marth 99), and Swift (NGCs 2237 and 2246); note that while now these numbers are used for describing parts of the diffuse nebula, their original NGC description is quite different:
2237  pretty bright, very very large, diffuse (?= [GC] 5361 [= NGC 2238])
2238  small [faint] star in nebulosity
2239  star of mag 8 in large, poor, bright cluster
2246  extremely faint, large, irregularly round, extremely difficult

Nevertheless, the nebula is a splendid object, especially for astrophotography.


Observer´s Log

Mixed Deep Sky
Rosette Nebula
Sky Database: Common Non-Stellar
RA: 06h 32m 41.0s Dec: +04°51'49"
RA: 06h 32m 24.0s Dec: +04°52'00" (Epoch 2000)
Hour angle: 01h 08m 49.4s Air mass: 1.26










Number of Frames: 10

Exposure:  300s ISO 800

Equipment: Takahashi FS-102, f/8, Canon EOS300D camera in prime focus

Date: 05-02-03

Processed with Photoshop CS and Noiseware.


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This site was last updated 2019-02-12                                                                                                          Site created and maintained by Jorge Lázaro