NGC 189
| AladinLite | |
| Constellation | Cassiopeia |
|
Position equinox : J2000.0 |
|
|---|---|
| Right ascension | 00 h 39 m 35.7 s |
| declination | + 61 ° 05 ′ 40 ″ |
| Appearance
|
|
| classification | III 2 p |
| Brightness (visual) | 8.8 likes |
| Brightness (B-band) | 9.07 likes |
| Angular expansion | 3.7 ' |
| Number of stars | 95 |
| Redness ( excess color E (BV)) | 0.950 |
| Physical data
|
|
| distance | 3500 ly |
| history | |
| Discovered by | Caroline Herschel |
| Discovery time | September 27, 1783 |
| Catalog names | |
| NGC 189 • C 0036 + 608 • OCl 301 • Cr 462 • Lund 23 • GC 93 • h 36 | |
NGC 189 is an open star cluster in the constellation Cassiopeia , which is about 3500 light years from Earth .
discovery
NGC 189 was originally discovered by Caroline Herschel on September 27, 1783 . However, the discovery was not noted and was forgotten. On October 27, 1829 , NGC 189 was rediscovered by the British astronomer John Frederick William Herschel .
Web links
Individual evidence
- ↑ a b NASA / IPAC EXTRAGALACTIC DATABASE
- ^ A b c Students for the Exploration and Development of Space
- ↑ a b SIMBAD database
- ↑ Three-color photometry from NGC 189 and Stock 24 Balazs, Bela A. 1961
- ^ Students for the Exploration and Development of Space / Open Cluster NGC 189 . Retrieved January 17, 2011.
- ↑ Seligman