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Brown dwarf

2MASS J0939-2448

Also 2MASS J09393548-2448279

Open in Ouranos

A brown dwarf — too light to shine like a star — one of the Sun's neighbours within 20 light-years.

Measured

Distance
17 light-years
Constellation
Antlia
Position (J2000)
RA 9h 39m 36s, Dec −24.81°

How far, from the Sun

17.4 light-years. To cross it:

  • Light17.4 years
  • Voyager 1's speed309,000 years
  • Driving at 100 km/h188 million 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 a cold T dwarf, probably a close pair of brown dwarfs.
  • Spectral type T8 (SIMBAD).

Where this comes from

  • Parallax 187.3 ± 4.6 mas (Kirkpatrick et al. 2021, ApJS 253, 7 — the 20-pc census of L, T and Y dwarfs)
  • 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.