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Chi1 Orionis
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Star Chi1 Orionis

Binary star Chi1 Orionis is located 28 light years away from the Sun. It consists of a yellow star and a red dwarf. For now, there are no known exoplanets in this star system.
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Sun distance
28 light years
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Chi1 Orionis A

Yellow star
Spectral class: G0 V

Location +

Ascension iconRight ascension: 5h 54m 22.761s
Declination iconDeclination: 20° 16' 33.068'' (northern hemisphere)
Parallax iconParallax: 114.950
Distance iconSun distance: 28.374 ly | 8.7 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: 102.9 % M Sun
| 1078 M Jupiter
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Star mass
Mass of the star Chi1 Orionis A is 1.029 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: 98 % R Sun
| 9.7 R Jupiter
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Star size
Radius of the star Chi1 Orionis A is 0.979 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: 5906 K | 1.02 T Sun
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Star temperature
Surface temperature of Chi1 Orionis A is 5906 K, which is 102 % 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: 0.35 billions years | 0.08 Sun
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Star age
Star Chi1 Orionis A is 0.35 billion years old, which is about 0.08 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: 1.081 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): 4.4
Magnitude iconAbsolute magnitude (V): 4.7
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

Chi1 Orionis B

Red dwarf
Spectral class: M6

Location +

Distance iconDistance from the primary: 6.1 AU

Basic characteristic

icon weight
Mass: 15 % M Sun
| 157 M Jupiter
+
Star mass
Mass of the star Chi1 Orionis B is 1.029 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: 20 % R Sun
| 1.8 R Jupiter
(estimate)
+
Star size
Radius of the star Chi1 Orionis B is not known. Its estimated value based on other similar stars is about 20 % 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: 3100 K
 (estimate)
+
Star temperature
Surface temperature of Chi1 Orionis B is estimated to be 3053 K, which is 54 % 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

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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Chi1 Orionis system structure

 Chi1 Orionis A
Chi1 Orionis B 6.1 AU

More about Chi1 Orionis

       Chi1 Orionis can be found in northern celestial hemisphere, and it is possible to see it with naked eye. The star is easily observable from Northern America, Europe and Asia.
Other designations of this star
54 Ori, Gliese 222, GJ 222, HR 2047, BD+20° 1162, HD 39587, LTT 11743, GCTP 1354.00, SAO 77705, HIC 27913, HIP 27913, Gaia EDR3 3399063235755057792
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Frequently Asked Questions

How far is the Chi1 Orionis system from the Sun?

The Chi1 Orionis system is 28 light years or 8.7 parsecs from the Sun.

What galaxy is the Chi1 Orionis star in?

The Chi1 Orionis is in the Milky Way galaxy just like the Sun.

How many stars are in the Chi1 Orionis system?

The Chi1 Orionis system contains 2 stars.

What type of star is the Chi1 Orionis?

The primary in the Chi1 Orionis system is a Yellow star star.

What temperature is star Chi1 Orionis?

The primary in the Chi1 Orionis system has a temperature of 5906 K. Find out more about the temperature of stars in Stellar guide
Closest stars

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 0 M☉ 3.8 ly

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Gaia EDR3 3426333598021539840
 - 5.2 ly

Gliese 1083
 - 6 ly

Gliese 239
 0.44 M☉ 7 ly
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