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Kappa Geminorum
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Star Kappa Geminorum

Binary star Kappa Geminorum is located 141 light years away from the Sun. It consists of a yellow giant and a yellow star. For now, there are no known exoplanets in this star system.
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Sun distance
141 light years
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Kappa Geminorum A

Yellow giant
Spectral class: G9 III

Location +

Ascension iconRight ascension: 7h 44m 26.854s
Declination iconDeclination: 24° 23' 52.787'' (northern hemisphere)
Parallax iconParallax: 23.070
Distance iconSun distance: 141.377 ly | 43.3 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: 207 % M Sun
| 2168 M Jupiter
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Star mass
Mass of the star Kappa Geminorum A is 2.07 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: 1100 % R Sun
| 109.5 R Jupiter
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Star size
Radius of the star Kappa Geminorum A is 11 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: 4932 K | 0.85 T Sun
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Star temperature
Surface temperature of Kappa Geminorum A is 4932 K, which is 85 % 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: 2.07 billions years | 0.45 Sun
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Star age
Star Kappa Geminorum A is 2.07 billion years old, which is about 0.45 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: 67.6 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

Kappa Geminorum B

Yellow star

Basic characteristic

icon weight
Mass: 100 % M Sun
| 1058 M Jupiter
 (estimate)
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Star mass
The mass of the star Kappa Geminorum B is unknown. Based on its other characteristics, it is estimated to be about 100 % 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: 110 % R Sun
| 11.2 R Jupiter
(estimate)
+
Star size
Radius of the star Kappa Geminorum B is not known. Its estimated value based on other similar stars is about 110 % 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: 5700 K
 (estimate)
+
Star temperature
Surface temperature of Kappa Geminorum B is estimated to be 5680 K, which is 99 % 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
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Kappa Geminorum system structure

 Kappa Geminorum A
Kappa Geminorum B

More about Kappa Geminorum

       Kappa Geminorum can be found in northern celestial hemisphere.
Other designations of this star
κ Gem, 77 Geminorum, BD+24° 1759, FK5 294, HD 62345, HIC 37740, HIP 37740, HR 2985, SAO 79653
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Frequently Asked Questions

How far is the Kappa Geminorum system from the Sun?

The Kappa Geminorum system is 141 light years or 43.3 parsecs from the Sun.

What galaxy is the Kappa Geminorum star in?

The Kappa Geminorum is in the Milky Way galaxy just like the Sun.

How many stars are in the Kappa Geminorum system?

The Kappa Geminorum system contains 2 stars.

What type of star is the Kappa Geminorum?

The primary in the Kappa Geminorum system is a Yellow giant star.

What temperature is star Kappa Geminorum?

The primary in the Kappa Geminorum system has a temperature of 4932 K. Find out more about the temperature of stars in Stellar guide
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