NGC 6823
Scientific overview
NGC 6823 is a cluster with nebulosity in the constellation Vulpecula. It shines at apparent magnitude 7.1 and spans about 6 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 · NGC 6823
| Distance | 7,599 ly | SIMBAD · catalogued |
| Physical size (major axis) | 13.263531 ly | SIMBAD · derived |
| Radial velocity | 29.93 ± 0.07 km/s | SIMBAD · measured |
| Right ascension (ICRS) | 295.794167 deg | SIMBAD · measured |
| Declination (ICRS) | 23.321111 deg | SIMBAD · measured |
Full field-level provenance
- Distance: Centre de données astronomiques de Strasbourg (CDS) · SIMBAD · mesDistance · dist · 2021A&A...651A.104P · distance indicator: paral · catalogued value · source value 2330 pc · 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 · 2021A&A...647A..19T · direct catalogue measurement · retrieved 2026-07-11
- Right ascension (ICRS): Centre de données astronomiques de Strasbourg (CDS) · SIMBAD · basic · ra · 2021A&A...647A..19T · direct catalogue measurement · retrieved 2026-07-11
- Declination (ICRS): Centre de données astronomiques de Strasbourg (CDS) · SIMBAD · basic · dec · 2021A&A...647A..19T · 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 Vulpecula
| Object | Type | Mag | Size (′) |
|---|---|---|---|
| NGC 6940NGC 6940 | Open cluster | 6.3 | 10.8 |
| Dumbbell NebulaM 27 · NGC 6853 | Planetary nebula | 7.4 | 6.7 |
| NGC 6830NGC 6830 | Open cluster | 7.9 | 4.2 |
| NGC 6802NGC 6802 | Open cluster | 8.8 | 4.5 |
| NGC 6882C 37 · NGC 6882 | Open cluster | 14.1 | 7.5 |
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.