Messier Index/M25

Open Cluster M25 (also known as Messier Object 25 or IC 4725) is an w:open cluster in the w:constellation Sagittarius. It was discovered by w:Philippe Loys de Chéseaux in w:1745 and included in w:Charles Messier's list in w:1764.

Messier 25
M25 48 06.jpgSketch of the cluster
Observation data (J2000.0 epoch)
Right ascension 18h 31.6m
Declination −19° 15′
Distance 2.0 kly (613 Pc)
Apparent magnitude (V) 4.6
Apparent dimensions (V) 32.0′
Other designations IC 4725

M25 is at a distance of about 2,000 w:light-years away from w:Earth. The spatial dimension of this cluster is about 19 w:light years across. A Delta Cephei type w:variable star designated U Sagittarii is a member of this cluster.

External links