The Binocular Sky


M10 (NGC 6254)

Constellation: Oph
Object Type: Globular Cluster
RA:  16h 57m 8s
Dec:  -4° 5' 56"
Magnitude: 6.6
Recommended minimum aperture: 50mm

Charts for 70mm Binocular (4° aperture circle).   Click on a chart to print it.


I find the easiest way to find M10 is to navigate from M12. Place M12 at the NW of the field of view, and M10 should be near the opposite side of the field.

What You Should See:

At magnitude 6.6, M10 is an easy object in 70mm binoculars in moderately good skies. It shows a very distinct brightening to the core as compared with the nearby M12. The bright star to the E is the 5th magnitude 30 Oph; if your sky is sufficiently dark, you can use this star as a guide to the location of the cluster. Like all globulars, it benefits from averted vision.