M71, Globular Cluster in Sagitta
Target Type R. A. Dec. Constellation Magnitude Size M71 (NGC 6838) Globular Cluster 19h 53m 47s +18° 46′ 45″ Sagitta +8.18 3.3 arcmin Overview When is an open cluster not an open cluster? When it’s a globular cluster! M71 caused consternation once upon a time when astronomers couldn’t agree whether it was a loose globular …