Messier Objects

M92: Globular Star Cluster (Hercules) RA: 17h 17.1m / DEC: +43° 08'.2
Instrument: 10-inch Starfinder

M92 is another Messier object that languishes in the shadow of a more impressive sibling. M92 shares the same constellation as M13. While M13 is hailed as the Great Hercules Cluster, M92 is all but forgotten. This is unfortunate as the smaller globular cluster presents an impressive view in moderate aperture. My sketch captures the appearance at 129X in the 10-inch Starfinder equatorial Newtonian. M92 covers a 12' area. Its central core spans 3 minutes of arc in a triangular pattern. The bright field star at the eastern edge of the globular shines at 8.7 magnitude. You'll find M92 about 6.3 degrees north of 3.2 magnitude Pi (67) Herculis.

M91 M93


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Revised: February 15, 2002 [WDF]