do not follow here
Stellar Catalog more icon Nearby stars catalogue more icon
Chi Eridani
more icon

Star Chi Eridani

Binary star Chi Eridani is located 57 light years away from the Sun. It consists of a yellow giant and a orange star. For now, there are no known exoplanets in this star system.
Loading 3D model
Nearby stars catalogue
Sun distance
57 light years
galaxy map

Chi Eridani A

Yellow giant, High proper motion star
Spectral class: G8IIIbCNIV

Location +

Ascension iconRight ascension: 1h 55m 58.637s
Declination iconDeclination: -51° 36' 27.251'' (southern hemisphere)
Parallax iconParallax: 56.851
Distance iconSun distance: 57.371 ly | 17.6 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: 158 % M Sun
| 1655 M Jupiter
+
Star mass
Mass of the star Chi Eridani A is 1.58 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: 399 % R Sun
| 39.7 R Jupiter
+
Star size
Radius of the star Chi Eridani A is 3.993 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: 5115 K | 0.89 T Sun
+
Star temperature
Surface temperature of Chi Eridani A is 5115 K, which is 89 % 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: 9.84 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 iconApparent magnitude (V): 3.7
Magnitude iconAbsolute magnitude (V): 2.5
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

Chi Eridani B

Orange star, , High proper motion star

Location +

Distance iconDistance from the primary: 128 AU

Basic characteristic

icon weight
Mass: 70 % M Sun
| 764.7 M Jupiter
 (estimate)
+
Star mass
The mass of the star Chi Eridani B is unknown. Based on its other characteristics, it is estimated to be about 70 % of the Sun's mass.

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: 80 % R Sun
| 7.6 R Jupiter
(estimate)
+
Star size
Radius of the star Chi Eridani B is not known. Its estimated value based on other similar stars is about 80 % 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 iconTemperature: 4000 K
 (estimate)
+
Star temperature
Surface temperature of Chi Eridani B is estimated to be 4024 K, which is 69 % 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

Photometry

Magnitude iconApparent magnitude (V): 10.7
Magnitude iconAbsolute magnitude (V): 9.5
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
Advertisement

Chi Eridani system structure

 Chi Eridani A
Chi Eridani B 128 AU

More about Chi Eridani

       Chi Eridani can be found in southern celestial hemisphere, and it is possible to see it with naked eye.
Other designations of this star
χ Eri, FK5 68, GJ 81, Gliese 81, HD 11937, HIP 9007, HR 566, SAO 232573, Gaia EDR3 4937200425857908992
Advertisement

Frequently Asked Questions

How far is the Chi Eridani system from the Sun?

The Chi Eridani system is 57 light years or 17.6 parsecs from the Sun.

What galaxy is the Chi Eridani star in?

The Chi Eridani is in the Milky Way galaxy just like the Sun.

How many stars are in the Chi Eridani system?

The Chi Eridani system contains 2 stars.

What type of star is the Chi Eridani?

The primary in the Chi Eridani system is a Yellow giant star.

What temperature is star Chi Eridani?

The primary in the Chi Eridani system has a temperature of 5115 K. Find out more about the temperature of stars in Stellar guide
Closest stars

 WT 50
 - 2.6 ly

HD 10647
 1.1 M☉ 3 ly

SIPS J0128-5545
 - 6.8 ly

LEHPM 1343
 - 7.1 ly

L 294-92
 - 7.2 ly
3D map of stellar neighborhood
List of all nearby stars
Advertisement

exoplanet iconAbout Stellar Catalog

line
Working with real data
icon Data in Stellar Catalog come from trusted scientific sources. Primary source is Gaia space telescope mapping the stars in Milky Way. Other sources include research papers, Simbad catalog and Exoplanet.eu database.
Estimated values
icon Objects listed in the Stellar Catalog often have values that are estimates. These estimates are determined using their known characteristics, such as spectral type, brightness across different wavelengths, distance from a star, and other factors.
Fresh and validated
icon Stellar Catalog is continuously updated with new information from research papers. Stellar and planetary data are validated by automatic processes as well as humans.
Get your next news from nearby stars
Stellar Catalog brings the stars from our galaxy to you. Discover their position, physical properties and whether there are any exoplanets or disks orbiting them. The data in Stellar Catalog come from respectable sources like Gaia space telescope, or SIMBAD database.
Visit Stellar catalog on Facebook
Visit profile on X

Advertisement