NGC 6590
Scientific overview
NGC 6590 is a reflection nebula in the constellation Sagittarius. It shines at apparent magnitude 9.8 and spans about 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 · NGC 6590
| Right ascension (ICRS) | 274.275 deg | SIMBAD · measured |
| Declination (ICRS) | -19.865 deg | SIMBAD · measured |
Full field-level provenance
- Right ascension (ICRS): Centre de données astronomiques de Strasbourg (CDS) · SIMBAD · basic · ra · 2003A&A...399..141M · direct catalogue measurement · retrieved 2026-07-11
- Declination (ICRS): Centre de données astronomiques de Strasbourg (CDS) · SIMBAD · basic · dec · 2003A&A...399..141M · 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 Sagittarius
| Object | Type | Mag | Size (′) |
|---|---|---|---|
| M 25M 25 | Open cluster | 4.6 | 14.1 |
| NGC 6530NGC 6530 | Cluster with nebulosity | 4.6 | 6 |
| M 23M 23 · NGC 6494 | Open cluster | 5.5 | 16.8 |
| Lagoon NebulaM 8 · NGC 6523 | Nebula | 5.8 | 45 |
| M 21M 21 · NGC 6531 | Open cluster | 5.9 | 6 |
| M 22M 22 · NGC 6656 | Globular cluster | 6.17 | 12.6 |
| M 55M 55 · NGC 6809 | Globular cluster | 6.49 | 12 |
| M 18M 18 · NGC 6613 | Open cluster | 6.9 | 6 |
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.