'Open Cluster M25' (also known as 'Messier Object 25' or 'IC 4725') is an
open cluster in the
constellation Sagittarius. It was discovered by
Philippe Loys de Chéseaux in
1745 and included in
Charles Messier's list in
1764.
M25 is at a distance of about 2,000
light-years away from
Earth. The spatial dimension of this cluster is about 19
light years across. A
Delta Cephei type
variable star designated ''U Sagittarii'' is a member of this cluster.
External links
★
Messier 25, SEDS Messier pages