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HR 4796
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Star HR 4796

Binary star HR 4796 is located 231 light years away from the Sun. It consists of a white-blue star and a red dwarf. For now, there are no known exoplanets in this star system.
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Sun distance
231 light years
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HR 4796 A

White-Blue star
Spectral class: A0V

Location +

Ascension iconRight ascension: 12h 36m 0.955s
Declination iconDeclination: -39° 52' 10.603'' (southern hemisphere)
Parallax iconParallax: 14.130
Distance iconSun distance: 230.826 ly | 70.8 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: 218 % M Sun
| 2284 M Jupiter
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Star mass
Mass of the star HR 4796 A is 2.18 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: 168 % R Sun
| 16.7 R Jupiter
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Star size
Radius of the star HR 4796 A is 1.68 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: 9378 K | 1.62 T Sun
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Star temperature
Surface temperature of HR 4796 A is 9378 K, which is 162 % 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: 0.008 billions years | 0 Sun
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Star age
Star HR 4796 A is 0.008 billion years old, which is about 0 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: 23 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 iconAbsolute magnitude (V): -4.3
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

HR 4796 B

Red dwarf
Spectral class: M2.5V

Location +

Distance iconDistance from the primary: 560 AU

Basic characteristic

icon weight
Mass: 30 % M Sun
| 314 M Jupiter
+
Star mass
Mass of the star HR 4796 B is 2.18 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: 30 % R Sun
| 3.1 R Jupiter
(estimate)
+
Star size
Radius of the star HR 4796 B is not known. Its estimated value based on other similar stars is about 30 % 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: 3500 K
 (estimate)
+
Star temperature
Surface temperature of HR 4796 B is estimated to be 3542 K, which is 61 % 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): -4.3
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
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HR 4796 system structure

 HR 4796 A
HR 4796 A Debris disk 75 AU 16 R⊕ -
HR 4796 B 560 AU

More about HR 4796

       HR 4796 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
Gaia DR3 6147117727029871360
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External sources
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Frequently Asked Questions

How far is the HR 4796 system from the Sun?

The HR 4796 system is 231 light years or 70.8 parsecs from the Sun.

What galaxy is the HR 4796 star in?

The HR 4796 is in the Milky Way galaxy just like the Sun.

How many stars are in the HR 4796 system?

The HR 4796 system contains 2 stars.

What type of star is the HR 4796?

The primary in the HR 4796 system is a White-Blue star star.

What temperature is star HR 4796?

The primary in the HR 4796 system has a temperature of 9378 K. Find out more about the temperature of stars in Stellar guide
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