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Brown dwarf

2MASS J0415-0935

Also 2MASSI J0415195-093506

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
19 light-years
Constellation
Eridanus
Position (J2000)
RA 4h 15m 19s, Dec −9.59°

How far, from the Sun

18.6 light-years. To cross it:

  • Light18.6 years
  • Voyager 1's speed331,000 years
  • Driving at 100 km/h201 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 of about 700 K, a standard for classifying late T dwarfs. In 2006 it was the coldest T dwarf known; colder ones have been found since.
  • Spectral type T8 (SIMBAD).

Where this comes from

  • Parallax 175.2 ± 1.7 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.