Globular Cluster M4 (NGC 6121), class IX,
Discovered by Philippe Loys de Chéseaux in 1746.
- Distance from Sun:
- 7.2 kly
- Distance from Galactic Center:
- 19.2 kly
- Apparent Diameter:
- 36.0 arc min
- 5.63 mag vis
- Radial Velocity:
- +70.7 +/- 0.2 km/s
- 55 ly
- Abs. Mag:
- -7.19 Mag vis
Independently rediscovered by Abbe Nicholas Louis de la Caille in 1751-2.
Globular Cluster M4 was discovered by Philippe Loys de Chéseaux in
1746, and independently found by Abbe Nicholas Louis de la Caille in
1751-2. Charles Messier cataloged it on May 8, 1764.
At 7,200 light years, it is the nearest globular cluster to our solar system.
M4 lies at only 1.3 deg distance west of bright Antares.
Situated closely nearby is fainter NGC 6144 which
is only 50' to the ENE.
[MW Globulars] |