Globular cluster · Hercules
M92
Also known as: NGC 6341
mag 6.511′ across
About
M92 is a globular cluster of magnitude 6.5 in Hercules, about 11′ across.
How to find it
- M92 is in the constellation Hercules.
- Best evenings: around late July it is highest at about 9 pm (10 pm in summer time); a month earlier, two hours later.
- Where on Earth: it is seen well, at least 10° up, from north of 37° S.
- Keystone: Another fine globular cluster, 6° north of π Herculis; often overlooked.
When it rises and sets tonight, how high it climbs and how much the Moon gets in the way are worked out in your browser for your place.
What you will see
- EyesNot visible to the naked eye.
- Binoculars (10×50)A fuzzy ball, brighter towards the middle.
- Telescope (6–8 inch)Resolves into a swarm of stars at medium power, with a dense core.
For a dark country sky with no Moon. From a city, faint galaxies and nebulae can disappear completely.
Facts
| Designations | M92, NGC 6341 |
|---|---|
| Type | Globular cluster |
| Magnitude | 6.5The smaller the number, the brighter. |
| Apparent size | 11′the full Moon is 31′ across |
| Surface brightness | ≈ 20.3 mag/arcsec²Estimate from the magnitude and size, per square arcsecond. |
| Constellation | Hercules |
| Right ascension (J2000) | 17h 17m 07.3s |
| Declination (J2000) | +43° 08′ 11″ |
More in Hercules
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NGC 6229Prize Comet Globular ClusterGlobular cluster · mag 9.9
IC 4593White-eyed Pea NebulaPlanetary nebula · mag 10.7Sources and credits
Catalog data: OpenNGC by Mattia Verga, CC BY-SA 4.0, and d3-celestial by Olaf Frohn, BSD 3-Clause. All data sources →