Messier 3

Messier 3
Globular cluster Messier 3 in Canes Venatici
Observation data (J2000 epoch)
ClassVI[1][2]
ConstellationCanes Venatici
Right ascension13h 42m 11.62s[3]
Declination+28° 22′ 38.2″[3]
Distance33.9 kly (10.4 kpc)[4]
Apparent magnitude (V)6.39[5]
Apparent dimensions (V)18′.0
Physical characteristics
Absolute magnitude-8.93
Mass4.5×105[6] M
Radius103.0 pc (335.9 ly)[7]
Tidal radius113 pc (370 ly)[mean][7]
Metallicity = –1.34[8] dex
Estimated age11.39 Gyr[8]
Other designationsNGC 5272[9]
See also: Globular cluster, List of globular clusters

Messier 3 (M3; also NGC 5272) is a globular cluster of stars in the northern constellation of Canes Venatici.

  1. ^ Cite error: The named reference thompson_thompson2007 was invoked but never defined (see the help page).
  2. ^ Cite error: The named reference hcob849_11 was invoked but never defined (see the help page).
  3. ^ a b Cite error: The named reference aj140_6_1830 was invoked but never defined (see the help page).
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  6. ^ Cite error: The named reference mnras406_3_2000 was invoked but never defined (see the help page).
  7. ^ a b Cite error: The named reference Brosche was invoked but never defined (see the help page).
  8. ^ a b Cite error: The named reference mnras404_3_1203 was invoked but never defined (see the help page).
  9. ^ "M 3". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2006-11-15.{{cite web}}: CS1 maint: postscript (link)