Herschel 400 Objects

NGC 6171=M107: Globular Star Cluster (Ophiuchus) RA: 16h 32.5m / DEC: -13° 03'.7
Instrument: 10-inch Starfinder

M107 is one of more than 20 bright globular clusters in Ophiuchus, seven of which belong to the Messier catalog. You'll find this 7.8 magnitude cluster 2.7 degrees southwest of 2nd magnitude Zeta (13) Ophiuchi. At 129X in my 10-inch Newtonian, M107 presents an 8' diameter form with 11th and 12th magnitude stars defining its outer boundaries. The cluster displays three section: a 2' diameter central core, a somewhat brighter adjacent layer extending 4' across and an outer envelope reaching 8' across. A row of four 13th and 14th magnitude stars are visible in the northern half of the cluster.

NGC 6144 NGC 6207


Navigation Image, see text links below Web Links Glossary Sketching Astrophotography Planetary Observing Deep-sky Observing Getting Started About Cosmic Voyage Home

Home | About Cosmic Voyage | Getting Started | Deep-sky Observing | Planetary Observing | Astrophotography | Sketching | Glossary | Web Links


URL: http://www.cosmicvoyage.net
Layout, design & revisions © W. D. Ferris
Comments and Suggestions: wdferris1@gmail.com

Revised: January 26, 2003 [WDF]