NGC 2309
AladinLite | |
Constellation | unicorn |
Position equinox : J2000.0 |
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Right ascension | 06 h 56 m 03.6 s |
declination | -07 ° 10 ′ 28 ″ |
Appearance
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classification | II2m |
Brightness (visual) | 10.5 mag |
Angular expansion | 5.0 |
Physical data
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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 .