Messier 75

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Globular cluster
Messier 75
Photo from the Hubble Space Telescope
Photo from the Hubble Space Telescope
AladinLite
Constellation Sagittarius
Position
equinoxJ2000.0 , epoch : J2000.0
Right ascension 20 h 06 m 04.8 s
declination −21 ° 55 ′ 20.1 ″
Appearance
Concentration class I.
Brightness  (visual) 9.18 likes
Brightness  (B-band) 10.03 mag
Angular expansion 6.8 '
Physical data
Affiliation Milky Way
Redshift −0.000631 ± 0.000012
Radial velocity −198 ± 4 km / s
distance 67.5  kLj
(20.5  kpc ) 
diameter 67 ly
history
discovery Pierre Méchain
Discovery date August 27, 1780
Catalog names
 M  75 •  NGC  6864 • C 2003-220 •  GCl  116 •  ESO  595-SC013 •

Messier 75 (also referred to as NGC 6864 ) is a 9.2  mag bright globular cluster with an angular extent of 6.8 'in the constellation Sagittarius . Viewed from Earth, it lies on the other side of our Milky Way and, at a distance of 67,500 light years, is one of the most distant galactic globular clusters and the most distant in the Messier catalog.

Individual evidence

  1. a b c d SIMBAD
  2. Harlow Shapley, Helen B. Sawyer: A Classification of Globular Clusters . In: Harvard College Observatory Bulletin . tape 849 , 1927, pp. 11-14 , bibcode : 1927BHarO.849 ... 11S .
  3. a b M75 at SEDS
  4. Seligman