Key facts
- Constellation
- Indus
- Right ascension
- 22 03 21.65363
- Declination
- −56 ° 47 ′ 09.5228 ″
- Apparent magnitude v
- 4.674 ± 0.006
- Evolutionary stage
- main sequence
- Spectral type
- K5V + T1 + T6
- B v color index
- 1.056 ± 0.016
via Wikipedia infobox
Wikidata facts
- Instance of
- multiple star
- Constellation
- Indus
- Distance from Earth
- 11.87
- Image
- Artist's Conception of Epsilon Indi System (labelled).jpg
Show 7 more facts
- catalog code
- WDS J22034-5647AB
- right ascension
- 330.84000
- epoch
- J2000.0
- declination
- -56.78583
- luminosity
- 0.22
- absolute magnitude
- 6.89
- Commons category
- Epsilon Indi
Sources (2)
via Wikidata · CC0
~7 min read
Encyclopedic overview
Epsilon Indi, Latinized from ε Indi, is a star system located at a distance of approximately 12 light-years from Earth in the southern constellation of Indus. The star has an orange hue and is faintly visible to the naked eye with an apparent visual magnitude of 4.674. It consists of a K-type main-sequence star, ε Indi A, and two brown dwarfs, ε Indi Ba and ε Indi Bb, in a wide orbit around it. The brown dwarfs were discovered in 2003. ε Indi Ba is an early T dwarf (T1) and ε Indi Bb a late T dwarf (T6) separated by 0.6 arcseconds, with a projected distance of 1460 AU from their primary star.
ε Indi A has one known planet, ε Indi Ab, with a mass of 6.31 Jupiter masses in an elliptical orbit with a period of about 171.3 years. ε Indi Ab is the second-closest Jovian exoplanet, after ε Eridani b. The ε Indi system provides a benchmark case for the study of the formation of gas giants and brown dwarfs.
Excerpted from Wikipedia’s “Epsilon Indi” article, available under the CC BY-SA 4.0 licence.