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Open star cluster

Caroline's Rose

Also NGC 7789

Open in OuranosCompare its size

A rich open cluster about a billion years old, in Cassiopeia.

Measured

Distance
6,420 light-years
Size
about 30 light-years across (approximate)
Constellation
Cassiopeia
Position (J2000)
RA 23h 57m 19s, Dec +56.72°

How far, from the Sun

6,420 light-years. To cross it:

  • Light6,420 years
  • Voyager 1's speed114 million years
  • Driving at 100 km/h69.3 billion years

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

Facts

  • Gaia picks out about 4,125 member stars (Hunt & Reffert 2023).

How it was found

  • Caroline Herschel discovered it in 1783.

Where this comes from

  • Hunt & Reffert 2023, A&A 673, A114: Gaia DR3 cluster distance 1968.5 pc (16th–84th percentile 1966.6–1970.4 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.