Rosette nebula

Database links to Rosette Nebula

Emission nebula
Data of the Rosette Nebula
AladinLite
Constellation	unicorn
Position equinox :  J2000.0 , epoch : J2000.0
Right ascension	06 h 30 m 42.0 s
declination	+ 05 ° 01 ′ 00 ″
Appearance
Apparent brightness  (visual)	6.0 likes
Angular expansion	80.0 '× 60.0'
Ionizing source
designation	NGC 2244
Type	Open star cluster
Physical data
history
discovery	John Flamsteed John Herschel Albert Marth Lewis A. Swift
Date of discovery	February 17, 1690 March 1830 February 28, 1864 1865 February 27, 1886
Catalog names
NGC  2237-2239 • NGC 2244 • NGC 2246 • Cr 99 • Mel 47 • OCl 515 • Caldwell 50 • h 392 • GC 1420

The Rosette Nebula is a diffuse emission nebula with embedded open star clusters in the constellation Unicorn .

The Rosette Nebula

The nebula has a size of 80.0 '× 60.0' and an apparent magnitude of 6.0 mag. Today, the NGC objects designate NGC 2237 (observation by Lewis A. Swift of 1865), NGC 2238 (observation of Albert Marth of February 28, 1864), NGC 2239 (observation of John Herschel of March 1830) and NGC 2246 (observation of Lewis A. Swift February 27, 1886) various parts of the nebula. Historically, the four numbers denoted slightly different star clusters and nebulae in this area.

In the center of the nebula is the open star cluster NGC 2244 = (NGC 2239) (observation by John Flamsteed on February 17, 1690), which makes the nebula shine . The star cluster has an apparent magnitude of 4.8 mag and a diameter of 24 '.

See also

• Cocoon mist
• Strömgren Sphere
• List of diffuse nebulae

Web links

• Rosette Nebula in the NGC Interactive Database
• Rosette Nebula Information at the Anglo-Australian Observatory
• Spektrum.de : Amateur recordings [1] [2] [3] [4]

Individual evidence

1. ↑ ^{a b} SEDS : NGC 2238
2. ↑ NGC2237
3. ↑ NGC2238
4. ↑ NGC2239
5. ↑ NGC2244
6. ↑ NGC2246
7. ↑ SEDS : NGC 2239