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Brown dwarf

WISE 1541-2250

Also WISEP J154151.66-225025.2

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

Measured

Distance
20 light-years
Constellation
Libra
Position (J2000)
RA 15h 41m 52s, Dec −22.84°

How far, from the Sun

19.5 light-years. To cross it:

  • Light19.5 years
  • Voyager 1's speed347,000 years
  • Driving at 100 km/h211 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 Y dwarf, one of the coldest kinds of brown dwarf.
  • Spectral type Y1 (Schneider et al. 2015); it was first classed Y0, the type SIMBAD still lists.

Where this comes from

  • Parallax 166.9 ± 2 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.