Open cluster · Vela

IC 2391 Omicron Velorum Cluster

Also known as: C85

mag 2.560′ across

About

IC 2391, the Omicron Velorum Cluster, is an open cluster of magnitude 2.5 in Vela, about 60′ across.

IC 2391 is in the constellation Vela.
Best evenings: around mid-March it is highest at about 9 pm (10 pm in summer time); a month earlier, two hours later.
Where on Earth: it is seen well, at least 10° up, from south of 27° N.
False Cross: A bright, loose cluster 2° north of Alsephina; best in binoculars.

When it rises and sets tonight, how high it climbs and how much the Moon gets in the way are worked out in your browser for your place.

EyesEasy: a group of stars, even from the suburbs.
Binoculars (10×50)A rich scattering of stars — binoculars often give the best view.
Telescope (6–8 inch)Too big for the field of view — only part fits. Binoculars show it better.

For a dark country sky with no Moon. From a city, faint galaxies and nebulae can disappear completely.

Designations	IC 2391, C85
Type	Open cluster
Magnitude	2.5The smaller the number, the brighter.
Apparent size	60′the full Moon is 31′ across
Constellation	Vela
Right ascension (J2000)	08h 40m 31.9s
Declination (J2000)	−53° 02′ 08″