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13 Ceti Aa
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Star 13 Ceti Aa

Triple star system 13 Ceti Aa is located 69 light years away from the Sun. It is a system with 3 stars. For now, there are no known exoplanets in this star system.
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Sun distance
69 light years
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13 Ceti Aa

Yellow star
Spectral class: F7V+G4V

Location +

Ascension iconRight ascension: 0h 35m 14.882s
Declination iconDeclination: -3° 35' 34.237'' (equatorial region)
Parallax iconParallax: 47.050
Distance iconSun distance: 69.321 ly | 21.3 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: 118 % M Sun
| 1236 M Jupiter
+
Star mass
Mass of the star 13 Ceti Aa is 1.18 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: 130 % R Sun
| 13.2 R Jupiter
(estimate)
+
Star size
Radius of the star 13 Ceti Aa is not known. Its estimated value based on other similar stars is about 130 % 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: 6457 K | 1.12 T Sun
+
Star temperature
Surface temperature of 13 Ceti Aa is 6457 K, which is 112 % 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: 3.8 billions years | 0.83 Sun
+
Star age
Star 13 Ceti Aa is 3.8 billion years old, which is about 0.83 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: 2.63 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): 5.2
Magnitude iconAbsolute magnitude (V): 3.6
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

13 Ceti Ab

Yellow star
Spectral class: G4V

Basic characteristic

icon weight
Mass: 100 % M Sun
| 1058 M Jupiter
 (estimate)
+
Star mass
The mass of the star 13 Ceti Ab 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 13 Ceti Ab 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 13 Ceti Ab 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

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

13 Ceti B

Orange star
Spectral class: K3.5 V

Basic characteristic

icon weight
Mass: 90 % M Sun
| 943 M Jupiter
+
Star mass
Mass of the star 13 Ceti B is 1.01 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: 80 % R Sun
| 8.3 R Jupiter
(estimate)
+
Star size
Radius of the star 13 Ceti 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 icon
Temperature: 5754 K | 1 T Sun
+
Star temperature
Surface temperature of 13 Ceti B is 5754 K, which is 100 % 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: 2.5 billions years | 0.54 Sun
+
Star age
Star 13 Ceti B is 2.5 billion years old, which is about 0.54 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: 0.83 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

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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13 Ceti Aa system structure

 13 Ceti Aa
13 Ceti Ab
13 Ceti B

More about 13 Ceti Aa

       13 Ceti Aa can be found in southern celestial hemisphere, and it is possible to see it with naked eye. The star is also observable from Northern America, Europe and Asia.
Other designations of this star
HO 212, 13 Cet, BU Cet, NSV 212, BD−04°62, GC 696, GJ 23, Gliese 23, HD 3196, HIP 2762, HR 142, SAO 128839, WDS 00352-0336
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Frequently Asked Questions

How far is the 13 Ceti Aa system from the Sun?

The 13 Ceti Aa system is 69 light years or 21.3 parsecs from the Sun.

What galaxy is the 13 Ceti Aa star in?

The 13 Ceti Aa is in the Milky Way galaxy just like the Sun.

How many stars are in the 13 Ceti Aa system?

The 13 Ceti Aa system contains 3 stars.

What type of star is the 13 Ceti Aa?

The primary in the 13 Ceti Aa system is a Yellow star star.

What temperature is star 13 Ceti Aa?

The primary in the 13 Ceti Aa system has a temperature of 6457 K. Find out more about the temperature of stars in Stellar guide
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