M92 languishes in the shadow of a more impressive sibling, sharing its area of sky with 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 through moderate aperture. M92 is located about 6.3 degrees north of Pi Herculis, a 3.2 magnitude K giant marking the northeast corner of the keystone asterism.
| Summer Sky Tour: M92-Globular Cluster (Hercules) RA: 17h 17.1m / DEC: +43° 08'.2 |
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My sketch captures the appearance at 129X in the 10-inch Starfinder equatorial Newtonian. M92 covers a 12' area that would be considered impressive if not for the proximity of M13, lord of the northern sky globulars. M92's 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.