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Epsilon Indi
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Star Epsilon Indi

Triple star system Epsilon Indi is located 12 light years away from the Sun. It is a system with 3 stars. There is at least one exoplanet in this system.
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Sun distance
12 light years
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Epsilon Indi A

Orange star, High proper motion star
Spectral class: K5 V

Location +

Ascension iconRight ascension: 22h 3m 29.383s
Declination iconDeclination: -56° 47' 50.117'' (southern hemisphere)
Parallax iconParallax: 274.843
Distance iconSun distance: 11.867 ly | 3.6 pc
Star position
The position of a star tells us where it appears in the sky, similar to how we use coordinates like latitude and longitude on Earth. In astronomy, the three main coordinates are right ascension, declination and distance. .. icon More about Star position in StellarGuide

Basic characteristic

icon weight
Mass: 78.2 % M Sun
| 819 M Jupiter
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Star mass
Mass of the star Epsilon Indi A is 0.782 solar masses.

The mass of a star is the total amount of matter it contains. It is one of the most important properties of a star, as it determines almost everything about how the star lives, changes, and dies. In astronomy, star mass is usually measured in solar masses (M☉) — where 1 solar mass is equal to the mass of our Sun... icon More about Star mass in StellarGuide
radius icon
Size: 71 % R Sun
| 7.1 R Jupiter
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Star size
Radius of the star Epsilon Indi A is 0.713 solar radii.

The size of a star refers to its radius — the distance from its center to its surface. Star size is usually measured in solar radii (R☉), where 1 solar radius equals approximately 696,000 kilometers. Depending on their type and life stage, stars can be much smaller or larger than the Sun... icon More about Star size in StellarGuide
temperature icon
Temperature: 4682 K | 0.81 T Sun
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Star temperature
Surface temperature of Epsilon Indi A is 4682 K, which is 81 % of the temperature on the surface of the Sun.

The temperature of a star refers to the temperature at its surface, also called the photosphere. It is measured in kelvins (K), the standard unit for temperature in astronomy. A star’s temperature tells us a lot about its physical properties and where it stands in its evolutionary stage... icon More about Star temperature in StellarGuide
time icon
Age: 3.48 billions years | 0.76 Sun
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Star age
Star Epsilon Indi A is 3.48 billion years old, which is about 0.76 of the Sun's age.

The age of a star tells us how long it has been shining since it formed. Knowing a star’s age helps astronomers understand its life stage, how it has changed over time, and what will happen to it in the future... icon More about Star age in StellarGuide
luminosity icon
Luminosity: 0.22 L Sun
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Star luminosity
Luminosity is the total amount of energy a star gives off every second. Think of it as the star’s true brightness — not just how bright it looks from Earth. This is important because some stars may appear dim simply because they are far away, not because they’re actually faint... icon More about Star luminosity in StellarGuide

Photometry

Magnitude iconApparent magnitude (V): 4.7
Magnitude iconAbsolute magnitude (V): 6.9
Absolute stellar magnitude in different parts of the electromagnetic spectrum from infrared (K band) to ultraviolet (U band).
5
10
15
20
25
30
35
K
2.1
H
1.6
J
1.2
Grp
0.8
I
0.8
G
0.6
V
0.5
Gbp
0.5
B
0.4
U
0.3

Epsion Indi Ba

Brown dwarf, , High proper motion star
Spectral class: T1

Location +

Distance iconDistance from the primary: 1460 AU

Basic characteristic

icon weight
Mass: 6.6 % M Sun
| 69 M Jupiter
+
Star mass
Mass of the star Epsion Indi Ba is 0.782 solar masses.

The mass of a star is the total amount of matter it contains. It is one of the most important properties of a star, as it determines almost everything about how the star lives, changes, and dies. In astronomy, star mass is usually measured in solar masses (M☉) — where 1 solar mass is equal to the mass of our Sun... icon More about Star mass in StellarGuide
radius icon
Size: 8 % R Sun
| 0.8 R Jupiter
+
Star size
Radius of the star Epsion Indi Ba is 0.08 solar radii.

The size of a star refers to its radius — the distance from its center to its surface. Star size is usually measured in solar radii (R☉), where 1 solar radius equals approximately 696,000 kilometers. Depending on their type and life stage, stars can be much smaller or larger than the Sun... icon More about Star size in StellarGuide
temperature icon
Temperature: 1360 K | 0.24 T Sun
+
Star temperature
Surface temperature of Epsion Indi Ba is 1360 K, which is 24 % of the temperature on the surface of the Sun.

The temperature of a star refers to the temperature at its surface, also called the photosphere. It is measured in kelvins (K), the standard unit for temperature in astronomy. A star’s temperature tells us a lot about its physical properties and where it stands in its evolutionary stage... icon More about Star temperature in StellarGuide
luminosity icon
Luminosity: 0.00002 L Sun
+
Star luminosity
Luminosity is the total amount of energy a star gives off every second. Think of it as the star’s true brightness — not just how bright it looks from Earth. This is important because some stars may appear dim simply because they are far away, not because they’re actually faint... icon More about Star luminosity in StellarGuide

Photometry

Magnitude iconAbsolute magnitude (V): 2.2
Absolute stellar magnitude in different parts of the electromagnetic spectrum from infrared (K band) to ultraviolet (U band).
5
10
15
20
25
30
35
K
2.1
H
1.6
J
1.2
Grp
0.8
I
0.8
G
0.6
V
0.5
Gbp
0.5
B
0.4
U
0.3

Epsion Indi Bb

Brown dwarf, , , High proper motion star
Spectral class: T6

Location +

Distance iconDistance from the primary: 2.4 AU

Basic characteristic

icon weight
Mass: 4.7 % M Sun
| 49 M Jupiter
+
Star mass
Mass of the star Epsion Indi Bb is 0.066 solar masses (or 69.1 Jupiter masses.)

The mass of a star is the total amount of matter it contains. It is one of the most important properties of a star, as it determines almost everything about how the star lives, changes, and dies. In astronomy, star mass is usually measured in solar masses (M☉) — where 1 solar mass is equal to the mass of our Sun... icon More about Star mass in StellarGuide
radius icon
Size: 8.2 % R Sun
| 0.8 R Jupiter
+
Star size
Radius of the star Epsion Indi Bb is 0.082 solar radii.

The size of a star refers to its radius — the distance from its center to its surface. Star size is usually measured in solar radii (R☉), where 1 solar radius equals approximately 696,000 kilometers. Depending on their type and life stage, stars can be much smaller or larger than the Sun... icon More about Star size in StellarGuide
temperature icon
Temperature: 990 K | 0.17 T Sun
+
Star temperature
Surface temperature of Epsion Indi Bb is 990 K, which is 17 % of the temperature on the surface of the Sun.

The temperature of a star refers to the temperature at its surface, also called the photosphere. It is measured in kelvins (K), the standard unit for temperature in astronomy. A star’s temperature tells us a lot about its physical properties and where it stands in its evolutionary stage... icon More about Star temperature in StellarGuide
luminosity icon
Luminosity: 0.000005 L Sun
+
Star luminosity
Luminosity is the total amount of energy a star gives off every second. Think of it as the star’s true brightness — not just how bright it looks from Earth. This is important because some stars may appear dim simply because they are far away, not because they’re actually faint... icon More about Star luminosity in StellarGuide

Photometry

Magnitude iconAbsolute magnitude (V): 2.2
Absolute stellar magnitude in different parts of the electromagnetic spectrum from infrared (K band) to ultraviolet (U band).
5
10
15
20
25
30
35
K
2.1
H
1.6
J
1.2
Grp
0.8
I
0.8
G
0.6
V
0.5
Gbp
0.5
B
0.4
U
0.3
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Epsilon Indi system structure

Stars B and C form a pair, which orbits the primary star A.
 Epsilon Indi A
Epsilon Indi A b 11.08 AU 941 M⊕ 10.6 R⊕ 15676.5 days
Epsion Indi Ba 1460 AU
Epsion Indi Bb 2.4 AU

More about Epsilon Indi

       Epsilon Indi can be found in southern celestial hemisphere, and it is possible to see it with naked eye.
Other designations of this star
Gliese 845, GJ 845, CD−57°8464, CP(D)−57°10015, GCTP 5314.00, HD 209100, HIP 108870, HR 8387, LHS 67, SAO 247287, FK5 825, UGP 544, eps Ind, ε Ind, Gaia EDR3 6412595290592307840
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External sources
icon study
icon study
A temperate super-Jupiter imaged with JWST in the mid-infrared
Scientific study, Accepted: 03. 03. 2025
icon study
icon study
Low-amplitude solar-like oscillations in the K5 V star ε Indi A
Scientific study, Accepted: 07. 03. 2024
icon study
Revised orbits of the two nearest Jupiters
Scientific study, Accepted: 25. 07. 2023
simbad icon
Simbad database (* eps Ind B)
Astronomical database SIMBAD (the Set of Identifications, Measurements and Bibliography for Astronomical Data)

News from this star system

Long wavelength observations of Epsilon Indi A b suggest a metal rich atmosphere and the presence of clouds
Image: Long wavelength observations of Epsilon Indi A b suggest a metal rich atmosphere and the presence of clouds
JWST’s new images of Epsilon Indi A b reveal its mass, orbit, and brightness, making this cold gas giant a benchmark for studying the evolution of giant planets....
11.3.2026
Read article >
James Webb Space Telescope has imaged a massive exoplanet orbiting nearby star Epsilon Indi A
Image: James Webb Space Telescope has imaged a massive exoplanet orbiting nearby star Epsilon Indi A
...
5.3.2025
Read article >

Frequently Asked Questions

How far is the Epsilon Indi system from the Sun?

The Epsilon Indi system is 12 light years or 3.6 parsecs from the Sun.

What galaxy is the Epsilon Indi star in?

The Epsilon Indi is in the Milky Way galaxy just like the Sun.

How many stars are in the Epsilon Indi system?

The Epsilon Indi system contains 3 stars.

What type of star is the Epsilon Indi?

The primary in the Epsilon Indi system is a Orange star star.

What temperature is star Epsilon Indi?

The primary in the Epsilon Indi system has a temperature of 4682 K. Find out more about the temperature of stars in Stellar guide
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