IC 2391

from Wikipedia, the free encyclopedia
Open star cluster
IC 2391
IC 2391 in Vele.jpg
AladinLite
Constellation Sails of the ship
Position
equinox : J2000.0
Right ascension 08 h 40 m 31.9 s
declination -53 ° 02 ′ 08 ″
Appearance

classification II3p
Brightness  (visual) 2.6 likes
Angular expansion 60
Physical data

Affiliation Milky Way
distance  490 ly
(150 pc )
diameter 9 ly
Age 50 million years
history
Discovered by al-Ṣūfī
Discovery time circa 964
Catalog names
 IC  2391 • C 0838-528 • OCl 767 •  Cr  191 • Lund 469 •  ESO  165-SC4 •

IC 2391 (also known as the Omicron Velorum Cluster ) is a galactic open star cluster in the constellation Vela in the southern sky . The star cluster is about 500 light years away from Earth and is 9 light years across. The object has an apparent brightness of 2 m , 6 and a diameter of 60  arc minutes and contains over 30 stars. IC  2391 can be seen with the naked eye. The star cluster is around 50 million years old.

It was probably first described in 964 by the Persian astronomer Abd ar-Rahman as-Sufi . In most catalogs, the discovery goes to Nicolas Louis de Lacaille , who discovered the object in South Africa in 1751 and cataloged it as Lac II 5.

Web links

Individual evidence

  1. ↑ NASA / IPAC EXTRAGALACTIC DATABASE
  2. ↑ a b c SEDS : IC 2391
  3. ↑ Seligman