M 92
Scientific overview
M 92 is a globular cluster in the constellation Hercules. It shines at apparent magnitude 6.52 and spans about 14.4 arcminutes of sky.
Observation guide
Guidance follows standard observing practice, derived from the object's real magnitude and position. A dark, moonless sky always helps.
Location in the sky
Precision measurements
Distances and velocities from SIMBAD · M 92
| Distance | 29,126 ly | SIMBAD · catalogued |
| Physical size (major axis) | 122.001718 ly | SIMBAD · derived |
| Radial velocity | -120.7 ± 0.3 km/s | SIMBAD · measured |
| Right ascension (ICRS) | 259.280792 deg | SIMBAD · measured |
| Declination (ICRS) | 43.135944 deg | SIMBAD · measured |
Full field-level provenance
- Distance: Centre de données astronomiques de Strasbourg (CDS) · SIMBAD · mesDistance · dist · 2015ApJ...812..149W · distance indicator: PM · catalogued value · source value 8.93 kpc · retrieved 2026-07-11
- Physical size (major axis): Centre de données astronomiques de Strasbourg (CDS) · derived (OpenNGC angular size × SIMBAD distance) · physical size = angular size × distance (small-angle); angular size from OpenNGC, distance from SIMBAD mesDistance · derived · retrieved 2026-07-11
- Radial velocity: Centre de données astronomiques de Strasbourg (CDS) · SIMBAD · basic · rvz_radvel · 2018MNRAS.478.1520B · direct catalogue measurement · retrieved 2026-07-11
- Right ascension (ICRS): Centre de données astronomiques de Strasbourg (CDS) · SIMBAD · basic · ra · 2010AJ....140.1830G · direct catalogue measurement · retrieved 2026-07-11
- Declination (ICRS): Centre de données astronomiques de Strasbourg (CDS) · SIMBAD · basic · dec · 2010AJ....140.1830G · direct catalogue measurement · retrieved 2026-07-11
Physical size is derived from the OpenNGC angular size and the catalogued distance (small-angle: size = angle × distance). This is a Galactic object: its Doppler shift is shown as a radial velocity, not a cosmological redshift. Fields a source did not provide are omitted, never invented.
Other objects in Hercules
| Object | Type | Mag | Size (′) |
|---|---|---|---|
| Hercules Globular ClusterM 13 · NGC 6205 | Globular cluster | 5.8 | 16.5 |
| NGC 6210NGC 6210 | Planetary nebula | 9.65 | 0.5 |
| NGC 6229NGC 6229 | Globular cluster | 9.86 | 4.8 |
Sources
The primary and reference sources this topic draws on.
- OpenNGCOpenNGC (M. Verga) — NGC/IC, Messier, and Caldwell catalogue data
Openly-licensed deep-sky catalogue: object types, positions, magnitudes, sizes, morphology, and cross-identifiers.