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Open star cluster

Messier 34

Also M34 · NGC 1039

Open in OuranosCompare its size

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

Measured

Distance
1,597 light-years
Size
about 17 light-years across (approximate)
Constellation
Perseus
Position (J2000)
RA 2h 42m 12s, Dec +42.72°

How far, from the Sun

1,600 light-years. To cross it:

  • Light1,600 years
  • Voyager 1's speed28.4 million years
  • Driving at 100 km/h17.2 billion years

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

Facts

  • It is about the size of the full Moon on the sky and visible to the naked eye under dark skies.
  • Gaia picks out about 1,095 member stars (Hunt & Reffert 2023).

Where this comes from

  • Hunt & Reffert 2023, A&A 673, A114: Gaia DR3 cluster distance 489.7 pc (16th–84th percentile 489.4–490.1 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.