# Messier Index/M15

Messier 15 or M15 (also designated NGC 7078) is a w:globular cluster in the w:constellation Pegasus. It was discovered by w:Jean-Dominique Maraldi in w:1746 and included in w:Charles Messier's catalogue of w:comet-like objects in w:1764. At an estimated 13.2 billion years old, it is one of the oldest known globular clusters.

M15

M15 photographed by Hubble Space Telescope. The planetary nebula Pease 1 can be seen as a fuzzy reddish object near the upper left of this image.
Observation data (J2000 epoch)
Class IV
Constellation Pegasus
Right ascension 21h 29m 58.38s[1]
Declination +12° 10′ 00.6″[1]
Distance 33.6 kly (10.3 kpc)
Apparent magnitude (V) +6.2
Apparent dimensions (V) 18′.0
Physical characteristics
Mass - kg (- M${\displaystyle {\odot }}$)