M 71
Submitted: Fri, 2017-10-27 09:32
Messier 71 (also known as M71 or NGC 6838) is a globular cluster in the constellation Sagitta. It was discovered by Philippe Loys de Chéseaux in 1745 and included by Charles Messier in his catalog of comet-like objects in 1780. It was also noted by Koehler at Dresden around 1775.
The star cluster is at a distance of about 12,000 light years away from Earth and spans some 27 light years across. The irregular variable star Z Sagittae is a member of this cluster.
R = 11 * 500 sec. bin1, G = 11 * 600 sec. bin1, B = 11 * 700 sec. bin1.
PixInsight 1.8, Photoshop CC
