NGC 2571
Scientific overview
NGC 2571 is an open cluster in the constellation Puppis. It shines at apparent magnitude 7 and spans about 7.2 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 2571
| Distance | 4,335 ly | SIMBAD · catalogued |
| Physical size (major axis) | 9.078403 ly | SIMBAD · derived |
| Radial velocity | 27 ± 0.25 km/s | SIMBAD · measured |
| Right ascension (ICRS) | 124.725 deg | SIMBAD · measured |
| Declination (ICRS) | -29.775 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 1329 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 · 2017AstBu..72..257L · direct catalogue measurement · retrieved 2026-07-11
- Right ascension (ICRS): Centre de données astronomiques de Strasbourg (CDS) · SIMBAD · basic · ra · 2020A&A...633A..99C · direct catalogue measurement · retrieved 2026-07-11
- Declination (ICRS): Centre de données astronomiques de Strasbourg (CDS) · SIMBAD · basic · dec · 2020A&A...633A..99C · 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 Puppis
| Object | Type | Mag | Size (′) |
|---|---|---|---|
| M 47M 47 · NGC 2422 | Open cluster | 4.4 | 19.8 |
| NGC 2477C 71 · NGC 2477 | Open cluster | 5.8 | 18.6 |
| M 46M 46 · NGC 2437 | Open cluster | 6.1 | 21 |
| M 93M 93 · NGC 2447 | Open cluster | 6.2 | 15 |
| NGC 2546NGC 2546 | Open cluster | 6.3 | 16.5 |
| NGC 2520NGC 2520 | Open cluster | 6.5 | 9.3 |
| NGC 2539NGC 2539 | Open cluster | 6.5 | 12.3 |
| NGC 2423NGC 2423 | Open cluster | 6.7 | 11.7 |
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.