NGC 121
|
Globular cluster NGC 121 |
|
|---|---|
|
|
| Image of the globular cluster with the Hubble Space Telescope . | |
| AladinLite | |
| Constellation | Toucan |
|
Position equinox : J2000.0 , epoch : J2000.0 |
|
| Right ascension | 00 h 26 m 49.0 s |
| declination | -71 ° 32 ′ 10 ″ |
| Appearance | |
| Brightness (visual) | +11.24 mag |
| Brightness (B-band) | +11.2 mag |
| Angular expansion | 1.5 ′ |
|
Color excess E (BV) (redness) |
0.037 mag |
| Physical data | |
| Affiliation | Small Magellanic Cloud |
| distance | approx. 210,000 ly |
| Dimensions | approx. 350,000 M ☉ |
| Core radius | 9.61 ″ ± 0.35 ″ |
| Age | (10.6 ± 0.5) billion years |
| Metallicity [Fe / H] | −1.71 ± 0.10 |
| history | |
| discovery | JFW Herschel |
| Discovery date | September 20, 1835 |
| Catalog names | |
| NGC 121 • ESO 50-12 • GC 58 • Lindsay 10 • Kron 2 | |
NGC 121 is the name of a globular cluster near the Small Magellanic Cloud in the constellation Toucan . In contrast to 47 Tucanae, NGC 121 is a member of the same. It has a diameter of 1.5 ′ and an apparent magnitude of 11.2 mag. The globular cluster is about 200,000 light years from the solar system and about 250 light years in diameter. With an estimated age of around 11 billion years, it is the oldest globular cluster in the SMC.
NGC 121 was discovered on September 20, 1835 by the British astronomer John Frederick William Herschel .
Web links
Commons : NGC 121 - collection of images, videos and audio files
Individual evidence
- ↑ SIMBAD database, operated at CDS, Strasbourg, France. Retrieved March 9, 2008 .
- ^ Students for the Exploration and Development of Space. Retrieved March 9, 2008 .
- ↑ NASA / IPAC Extragalactic Database
- ↑ http://cseligman.com/text/atlas/ngc1.htm#121