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M 75

Kroglasta kopica - Globular Cluster M75 (NGC 6864), class I, in sagittarius

Rektascenzija 20 : 06.1 (u:m)
Deklinacija -21 : 55 (sto:m)
Razdalja 57.7 (*1000 sv.l.)
Vizual. magnituda 8.5 (mag)
Zorni kot 6.0 (loc min)

At a distance of nearly 60,000 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 57,700 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).

Povzeto po:
Hartmut Frommert (spider@seds.org)
Christine Kronberg (smil@lrz.uni-muenchen.de)

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