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Brown dwarf

UGPS J0722-0540

Also UGPS J072227.51-054031.2

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
13 light-years
Constellation
Monoceros
Position (J2000)
RA 7h 22m 28s, Dec −5.68°

How far, from the Sun

13.4 light-years. To cross it:

  • Light13.4 years
  • Voyager 1's speed239,000 years
  • Driving at 100 km/h145 million years

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

Facts

  • Spectral type T9 (SIMBAD).

How it was found

  • When it was found in 2010 it was the coldest brown dwarf known, at about 520 K, a few hundred degrees above absolute zero.

Where this comes from

  • Parallax 242.8 ± 2.4 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.