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HD 984
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Star HD 984

Binary star HD 984 is located 149 light years away from the Sun. It consists of a yellow-white star and a brown dwarf. For now, there are no known exoplanets in this star system.
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Sun distance
149 light years
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HD 984 A

Yellow-White star
Spectral class: F7V

Location +

Ascension iconRight ascension: 0h 14m 10.367s
Declination iconDeclination: -7° 11' 57.901'' (equatorial region)
Parallax iconParallax: 21.877
Distance iconSun distance: 149.086 ly | 45.7 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: 120 % M Sun
| 1257 M Jupiter
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Star mass
Mass of the star HD 984 A is 1.2 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: 140 % R Sun
| 13.4 R Jupiter
(estimate)
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Star size
Radius of the star HD 984 A is not known. Its estimated value based on other similar stars is about 140 % 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: 6315 K | 1.09 T Sun
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Star temperature
Surface temperature of HD 984 A is 6315 K, which is 109 % 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: 0.08 billions years | 0.02 Sun
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Star age
Star HD 984 A is 0.08 billion years old, which is about 0.02 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

Photometry

Magnitude iconApparent magnitude (V): 7.3
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

HD 984 B

Brown dwarf

Location +

Distance iconDistance from the primary: 28 AU

Basic characteristic

icon weight
Mass: 6 % M Sun
| 63 M Jupiter
+
Star mass
Mass of the star HD 984 B is 1.2 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 icon
Temperature: 2730 K | 0.47 T Sun
+
Star temperature
Surface temperature of HD 984 B is 2730 K, which is 47 % 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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HD 984 system structure

 HD 984 A
HD 984 B 28 AU

More about HD 984

       HD 984 can be found in southern celestial hemisphere, you cannot see it with naked eye, but you can observe this star with basic telescope. The star is also observable from Northern America, Europe and Asia.
Other designations of this star
Gaia DR3 2431157720981843200
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External sources
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Frequently Asked Questions

How far is the HD 984 system from the Sun?

The HD 984 system is 149 light years or 45.7 parsecs from the Sun.

What galaxy is the HD 984 star in?

The HD 984 is in the Milky Way galaxy just like the Sun.

How many stars are in the HD 984 system?

The HD 984 system contains 2 stars.

What type of star is the HD 984?

The primary in the HD 984 system is a Yellow-White star star.

What temperature is star HD 984?

The primary in the HD 984 system has a temperature of 6315 K. Find out more about the temperature of stars in Stellar guide

stellar brief logoStellar Brief

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24. 10. 2026
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The changing light of blue supergiant HD 74371 points to a dramatic turn in its life: the star appears to be moving blueward after a red-supergiant phase. Other fresh findings reveal helium escaping from an exoplanet, infrared rhythms on WASP 121, shifting radio and X-ray emissions from young V1298 Tauri, and clouds across WASP-43 b.
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