|Right Ascension||20 : 06.1 (h:m)
|Declination||-21 : 55 (deg:m)
|Visual Brightness||8.5 (mag)
|Apparent Dimension||6.0 (arc min)
Discovered 1780 by Pierre Méchain.
At a distance of about 61,000 light years, M75 is one of the more remote of Messier's globular clusters, lying well beyond the Galactic center. Some sources give even larger distances, up to as much as 100,000 light years ! (E.g., Burnham has 95,000, but W.E. Harris' database has it with 61,300 which we adopt here.) This would make it the most remote Messier globular, and the most remote galactic Messier object at all.
M75 is one of the more compact, concentrated globulars, classified as class I. Because of this and its distance, larger scopes are required to resolve it into stars. Its angular diameter of 6' corresponds to a linear extension of well over 100 light years, and it is of high luminosity, perhaps about 160,000 times that of the Sun (Mag -8.3).
Last Modification: 9 Dec 1999, 22:58 MET