Epsilon Indi

Epsilon Indi (aka ε Indi or ε Ind) is a triple star system about 12 light-years away, of which two are co-orbiting brown dwarfs (T-dwarfs). In 2002, the radial velocity method revealed an extra-solar planet, which was not confirmed until astrometry confirmed the radial velocity data in 2018, and successful direct detection was carried out in 2023 using the James Webb Space Telescope.

Star system characteristics:

• Indus - constellation.
• 22h03m21.65363s - right ascension.
• -56deg47m09.5228s - declination.
• +4.674 - apparent magnitude.
• 11.9 ly - distance.
• +1.056 - B-V color index.

ε Ind A:

• K5V - spectral type.
• 0.782 - mass(solar).
• 0.21 - luminosity(solar).
• 0.713 - radius(solar).

The two brown dwarfs(ε Ind B ab:), each:

• ~0.05 and ~0.06 - mass(solar).
• 0.08 - radius(solar).
• less than 0.0001 - luminosity(solar).

Epsilon Indi Ab planet determinations:

• ~1 Jupiter radius.
• ~7 Jupiter masses.
• 275 K - temperature