The emission nebula IC 4628
AAO image reference AAT 105. « Previous || Next »
This beautiful, arc-like rim of nebulosity is in the far southern sky, out of sight from most of the USA and Europe. It is quite faint and has often been overlooked because of it, even by southern observers. However, it is in a rich region in Scorpius. This richness is reflected in the number of names associated with the objects in the field illustrated here. There is a large scattered star cluster, Collinder 316 which extends over most of the picture. It encloses Trumpler 24, more or less the same cluster under another name, and all of this is part of the Sco OB1 association, a much larger gathering of very hot, intrinsically luminous stars in this part of the sky. The nebula itself is also known as Gum 56, after the Australian Colin Gum who catalogued emission nebulae in the southern sky using wide field photography.
Top left is NE. Image width is about 52 arc min
Image and text © 1987-2002, Anglo-Australian Observatory,
photograph by David Malin.
Entry from NGC 2000.0
(R.W. Sinnott, Ed.) © Sky Publishing
IC 4628 Nb 16 57.0 -40 20 s Sco 90.F, eL, E pf, dif
For details of photographic exposure, search technical table by AAT