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Zeta Reticuli
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Star Zeta Reticuli

Binary star Zeta Reticuli is located 39 light years away from the Sun. It consists of 2 yellow star stars. For now, there are no known exoplanets in this star system.
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Sun distance
39 light years
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Zeta Reticuli A

Yellow star, High proper motion star
Spectral class: G2.5VHdel1

Location +

Ascension iconRight ascension: 3h 17m 49.269s
Declination iconDeclination: -62° 34' 20.757'' (southern hemisphere)
Parallax iconParallax: 83.024
Distance iconSun distance: 39.285 ly | 12.0 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: 95.8 % M Sun
| 1004 M Jupiter
+
Star mass
Mass of the star Zeta Reticuli A is 0.958 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: 92 % R Sun
| 9.2 R Jupiter
+
Star size
Radius of the star Zeta Reticuli A is 0.92 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: 5722 K | 0.99 T Sun
+
Star temperature
Surface temperature of Zeta Reticuli A is 5722 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
time icon
Age: 2 billions years | 0.43 Sun
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Star age
Star Zeta Reticuli A is 2 billion years old, which is about 0.43 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: 0.761 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): 5.5
Magnitude iconAbsolute magnitude (V): 5.1
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

Zeta Reticuli B

Yellow star
Spectral class: G1V

Basic characteristic

icon weight
Mass: 98.5 % M Sun
| 1032 M Jupiter
+
Star mass
Mass of the star Zeta Reticuli B is 0.958 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: 99 % R Sun
| 9.9 R Jupiter
+
Star size
Radius of the star Zeta Reticuli B is 0.99 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: 5892 K | 1.02 T Sun
+
Star temperature
Surface temperature of Zeta Reticuli B is 5892 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: 2 billions years | 0.43 Sun
+
Star age
Star Zeta Reticuli B is 2 billion years old, which is about 0.43 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: 0.972 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): 4.8
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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Zeta Reticuli system structure

 Zeta Reticuli A
Zeta Reticuli B

More about Zeta Reticuli

       Zeta Reticuli can be found in southern celestial hemisphere, and it is possible to see it with naked eye.
Other designations of this star
ζ2 Ret, Zeta2 Ret, CPD−62°265, Gliese 138, GJ 138, HD 20807, HIC 15371, HIP 15371, HR 1010, SAO 248774, LFT 276, LHS 172, LTT 1576, ζ1 Ret, Zeta1 Ret, CPD−63°217, Gliese 136, GJ 136, HD 20766, HIP 15330, HR 1006, SAO 248770, LFT 275, LHS 171, LTT 1573, Gaia EDR3 4722111590409480064
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External sources
simbad icon
Simbad database (* zet02 Ret)
Astronomical database SIMBAD (the Set of Identifications, Measurements and Bibliography for Astronomical Data)
gaia icon
Gaia database (Gaia EDR3 4722135642226902656)
Archive from the Gaia mission

Frequently Asked Questions

How far is the Zeta Reticuli system from the Sun?

The Zeta Reticuli system is 39 light years or 12.0 parsecs from the Sun.

What galaxy is the Zeta Reticuli star in?

The Zeta Reticuli is in the Milky Way galaxy just like the Sun.

How many stars are in the Zeta Reticuli system?

The Zeta Reticuli system contains 2 stars.

What type of star is the Zeta Reticuli?

The primary in the Zeta Reticuli system is a Yellow star star.

What temperature is star Zeta Reticuli?

The primary in the Zeta Reticuli system has a temperature of 5722 K. Find out more about the temperature of stars in Stellar guide
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