NGC 2309
|
|
| AladinLite | |
| Constellation | unicorn |
|
Position equinox : J2000.0 |
|
|---|---|
| Right ascension | 06 h 56 m 03.6 s |
| declination | -07 ° 10 ′ 28 ″ |
| Appearance
|
|
| classification | II2m |
| Brightness (visual) | 10.5 mag |
| Angular expansion | 5.0 |
| Physical data
|
|
| distance | 8200 ly (2511 pc ) |
| history | |
| Discovered by | William Herschel |
| Discovery time | March 4, 1785 |
| Catalog names | |
| NGC 2309 • C 0653-071 • Cr 122 • GC 1471 • H VI 18 • h 417 • | |
NGC 2309 is a type II2m open cluster in the constellation Monoceros . The cluster has a diameter of 5 arc minutes and an apparent magnitude of 10.5 mag.
The object was discovered on March 4, 1785 by William Herschel .