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Nu Octantis
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Star Nu Octantis

Binary star Nu Octantis is located 63 light years away from the Sun. It consists of a red giant and a red dwarf. There is at least one exoplanet in this system.
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Sun distance
63 light years
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Nu Octantis A

Red giant, Spectroscopic binary
Spectral class: K1III

Location +

Ascension iconRight ascension: 21h 41m 28.547s
Declination iconDeclination: -77° 23' 24.032'' (southern hemisphere)
Parallax iconParallax: 51.520
Distance iconSun distance: 63.307 ly | 19.4 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: 140 % M Sun
| 1467 M Jupiter
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Star mass
Mass of the star Nu Octantis A is 1.4 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: 590 % R Sun
| 58.7 R Jupiter
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Star size
Radius of the star Nu Octantis A is 5.9 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: 4860 K | 0.84 T Sun
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Star temperature
Surface temperature of Nu Octantis A is 4860 K, which is 84 % 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: 2.75 billions years | 0.6 Sun
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Star age
Star Nu Octantis A is 2.75 billion years old, which is about 0.6 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: 17.53 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): 3.7
Magnitude iconAbsolute magnitude (V): 2.3
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

Nu Octantis B

Red dwarf, , Spectroscopic binary

Location +

Distance iconDistance from the primary: 2.6087 AU

Basic characteristic

icon weight
Mass: 57.3 % M Sun
| 600 M Jupiter
+
Star mass
Mass of the star Nu Octantis B is 1.4 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
temperature iconTemperature: 4700 K
 (estimate)
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Star temperature
Surface temperature of Nu Octantis B is estimated to be 4741 K, which is 81 % 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

Magnitude iconAbsolute magnitude (V): -1.4
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
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Nu Octantis system structure

 Nu Octantis A
Nu Octantis A b
unconfirmed
 1.2 AU 794.8 M⊕ 418 days
Nu Octantis B 2.6087 AU

More about Nu Octantis

       Nu Octantis can be found in southern celestial hemisphere, and it is possible to see it with naked eye.
Other designations of this star
nu Oct, CD−77 1079, CCDM J21415-7723, FK5 810, GC 30289, GJ 9744, Gliese 9744, HIP 107089, HR 8254, HD 205478, SAO 257948, WDS J21415-7723
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External sources
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Frequently Asked Questions

How far is the Nu Octantis system from the Sun?

The Nu Octantis system is 63 light years or 19.4 parsecs from the Sun.

What galaxy is the Nu Octantis star in?

The Nu Octantis is in the Milky Way galaxy just like the Sun.

How many stars are in the Nu Octantis system?

The Nu Octantis system contains 2 stars.

What type of star is the Nu Octantis?

The primary in the Nu Octantis system is a Red giant star.

What temperature is star Nu Octantis?

The primary in the Nu Octantis system has a temperature of 4860 K. Find out more about the temperature of stars in Stellar guide
Closest stars

 PM J21142-7633
 - 2.1 ly

CD Octantis
 - 3.1 ly

SCR J2130-7710
 - 5.6 ly

UPM J2127-7217
 - 6.5 ly

LEHPM 4415
 - 6.6 ly
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