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Open star cluster

Messier 46

Also M46 · NGC 2437

Open in OuranosCompare its size

An open cluster: a family of stars born together from one cloud, slowly drifting apart.

Measured

Distance
5,070 light-years
Size
about 32 light-years across (approximate)
Constellation
Puppis
Position (J2000)
RA 7h 41m 50s, Dec −14.83°

How far, from the Sun

5,070 light-years. To cross it:

  • Light5,070 years
  • Voyager 1's speed90.1 million years
  • Driving at 100 km/h54.7 billion years

Voyager 1 at the speed it moved outward over the year to 2026-10-25 (JPL Horizons). Driving: nonstop, never refuelling.

Facts

  • The planetary nebula NGC 2438 appears inside it, but is a foreground object, not a member.
  • Gaia picks out about 2,577 member stars (Hunt & Reffert 2023).

Where this comes from

  • Hunt & Reffert 2023, A&A 673, A114: Gaia DR3 cluster distance 1554.5 pc (16th–84th percentile 1552.9–1556.2 pc)
  • This research has made use of the SIMBAD database, CDS, Strasbourg, France (Wenger et al. 2000, A&AS 143, 9).
  • This research has made use of the VizieR catalogue access tool, CDS, Strasbourg, France (DOI: 10.26093/cds/vizier).

Every catalogue Ouranos draws is credited on the credits page.