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Open star cluster

IC 4665

Open in OuranosCompare its size

A sparse, young open cluster in Ophiuchus, near the star Cebalrai.

Measured

Distance
1,120 light-years
Size
about 20 light-years across (approximate)
Constellation
Ophiuchus
Position (J2000)
RA 17h 46m 08s, Dec +5.63°

How far, from the Sun

1,120 light-years. To cross it:

  • Light1,120 years
  • Voyager 1's speed19.9 million years
  • Driving at 100 km/h12.1 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 visible to the naked eye in a dark sky.
  • Gaia picks out about 308 member stars (Hunt & Reffert 2023).

Where this comes from

  • Hunt & Reffert 2023, A&A 673, A114: Gaia DR3 cluster distance 343.3 pc (16th–84th percentile 343.1–343.6 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.