IC 2391

Open Cluster IC 2391

(= Lacaille II.5

= Caldwell 85), type ‘c’,

in Vela

The Omicron Velorum Cluster

Right Ascension	08 : 40.2 (h : m)
Declination	-53 : 04 (deg : m)
Distance	0.58 (kly)
Visual Brightness	2.5 (mag)
Apparent Dimension	50 (arc min)

This bright southern cluster was first described by the old Persian astronomer

Al Sufi about 964 AD.

Its brightest star is of apparent magnitude 3.63, its hottest of spectral type B3,

and its age is given as 36 million years in the Sky Catalog 2000, which also gives

its Trumpler class: II,3,p. It consists of about 30 stars.

Our image was obtained by David Malin of the

Anglo Australian Observatory and is

copyrighted; it may be used for private purpose only. For any other kind of use,

including internet mirroring and storing on CD-ROM, please contact

Coral Cooksley of the

Anglo Australian Observatory.

• More images by David Malin

  In John Caldwell’s observing list.

  In the

  Astronomical League’s Southern Sky Binocular Club list.

  
  

  ---

  Hartmut Frommert

  ([email protected])

  Christine Kronberg

  ([email protected])

  

  

  

  

  Last Modification: 29 Mar 1998, 13:25 MET