Messier 107

Messier 107
M107 from Hubble Space Telescope; 3.5′ view
Observation data (J2000 epoch)
ClassX[1]
Right ascension16h 32m 31.86s[2]
Declination–13° 03′ 13.6″[2]
Distance20.9 kly (6.4 kpc)[3]
Apparent magnitude (V)7.9[4]
Apparent dimensions (V)10′[5]
Physical characteristics
Mass1.82×105[3] M☉
Radius30 ly[6]
Metallicity = –0.95[7] dex
Estimated age13.95 Gyr[7]
Other designationsC 1629-129, GCl 44, M 107, NGC 6171[8]
See also: Globular cluster, List of globular clusters

Messier 107 or M107, also known as NGC 6171 or the Crucifix Cluster, is a very loose globular cluster in a very mildly southern part of the sky close to the equator in Ophiuchus, and is the last such object in the Messier Catalogue.

  1. ^ Cite error: The named reference hcob849_11 was invoked but never defined (see the help page).
  2. ^ a b Cite error: The named reference aj140_6_1830 was invoked but never defined (see the help page).
  3. ^ a b Cite error: The named reference apj742_1_51 was invoked but never defined (see the help page).
  4. ^ "Messier 107". SEDS Messier Catalog. Retrieved 30 April 2022.
  5. ^ Cite error: The named reference Mullaney2007 was invoked but never defined (see the help page).
  6. ^ From trigonometry: distance × sin( diameter_angle / 2 ) = 39.5 ly. radius
  7. ^ a b Cite error: The named reference mnras404_3_1203 was invoked but never defined (see the help page).
  8. ^ Cite error: The named reference simbad was invoked but never defined (see the help page).