NGC 4609
AladinLite | |
Constellation | southern Cross |
Position equinox : J2000.0 |
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Right ascension | 12 h 42 m 16.8 s |
declination | -62 ° 59 ′ 45 ″ |
Appearance
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classification | II1p |
Brightness (visual) | 6.9 likes |
Angular expansion | 6.0 ' |
Redness ( excess color E (BV)) | 0.37 ± 0.03 |
Physical data
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Affiliation | Milky Way |
Radial velocity | −21.3 ± 0.1 km / s |
distance | approx. 4000 ly (1223 pc ) |
Age | approx. 50 million years |
history | |
Discovered by | James Dunlop |
Discovery time | May 12, 1826 |
Catalog names | |
NGC 4609 • C 1239-627 • OCl 890 • Cr 263 • Dun 272 • Lund 625 • ESO 95-SC14 • GC 3145 • h 3407 • |
NGC 4609 is a galactic open star cluster in the south of the constellation Crux , near the center of the Coalsack . The distance from NGC 4609 is estimated to be around 1300 parsecs. The cluster was discovered by the Scottish astronomer James Dunlop on May 12, 1826 .
literature
- Tirion, Rappaport, Lovi, Uranometria 2000.0, William Bell-inc. ISBN 0-943396-14-X