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84 Ceti
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Star 84 Ceti

Binary star 84 Ceti is located 73 light years away from the Sun. It consists of a yellow-white star and a orange star. For now, there are no known exoplanets in this star system.
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Sun distance
73 light years
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84 Ceti A

Yellow-White star, High proper motion star
Spectral class: F7V

Location +

Ascension iconRight ascension: 2h 41m 14.236s
Declination iconDeclination: -0° 41' 46.340'' (equatorial region)
Parallax iconParallax: 44.869
Distance iconSun distance: 72.690 ly | 22.3 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: 116.8 % M Sun
| 1224 M Jupiter
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Star mass
Mass of the star 84 Ceti A is 1.168 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: 121 % R Sun
| 12 R Jupiter
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Star size
Radius of the star 84 Ceti A is 1.208 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: 6356 K | 1.1 T Sun
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Star temperature
Surface temperature of 84 Ceti A is 6356 K, which is 110 % 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: 2.1 billions years | 0.46 Sun
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Star age
Star 84 Ceti A is 2.1 billion years old, which is about 0.46 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: 2.133 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): 5.8
Magnitude iconAbsolute magnitude (V): 4
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

84 Ceti B

Orange star, , High proper motion star
Spectral class: K2V

Location +

Distance iconDistance from the primary: 74.5 AU

Basic characteristic

icon weight
Mass: 80 % M Sun
| 859 M Jupiter
 (estimate)
+
Star mass
The mass of the star 84 Ceti B is unknown. Based on its other characteristics, it is estimated to be about 80 % 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
| 7.9 R Jupiter
(estimate)
+
Star size
Radius of the star 84 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 iconTemperature: 5000 K
 (estimate)
+
Star temperature
Surface temperature of 84 Ceti B is estimated to be 4992 K, which is 87 % 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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84 Ceti system structure

 84 Ceti A
84 Ceti B 74.5 AU

More about 84 Ceti

       84 Ceti 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
84 Cet, BD–01 377, HD 16765, HIP 12530, HR 790, SAO 130055, Gaia EDR3 2498460442625153536
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External sources
gaia icon
Gaia database (Gaia EDR3 2498460442625344256)
Archive from the Gaia mission

Frequently Asked Questions

How far is the 84 Ceti system from the Sun?

The 84 Ceti system is 73 light years or 22.3 parsecs from the Sun.

What galaxy is the 84 Ceti star in?

The 84 Ceti is in the Milky Way galaxy just like the Sun.

How many stars are in the 84 Ceti system?

The 84 Ceti system contains 2 stars.

What type of star is the 84 Ceti?

The primary in the 84 Ceti system is a Yellow-White star star.

What temperature is star 84 Ceti?

The primary in the 84 Ceti system has a temperature of 6356 K. Find out more about the temperature of stars in Stellar guide
Closest stars

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 - 4.9 ly

Gamma Ceti
 1.9 M☉ 5.8 ly

TOI 2443
 0.64 M☉ 6.4 ly
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