A photometric study of the southern Coalsack
The Coalsack is a single dark nebula in Crux. It is probably the most conspicuous compact absorbing cloud in the southern Milky Way, visible to the naked eye against the background of diffuse light from the faint Milky Way stars. The only star visible in the body of the nebula is HD 110432, a Bo star of visual magnitude 5.4. The approximate centre of the nebula is at right ascension 12h 40m and southern declination 62° 40’, i.e. at galactic longitude 270° and latitude 0°. The main body...[Show more]
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