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Epsilon Lupi B
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Star Epsilon Lupi B

White-Blue star Epsilon Lupi B is located 512 light years away from the Sun. It is a single star of spectral class A5 V, that has 764 % of solar mass. For now, there are no known exoplanets in this star system.
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Sun distance
512 light years
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Epsilon Lupi B

White-Blue star
Spectral class: A5 V

Basic characteristic

icon weight
Mass: 764 % M Sun
| 8003 M Jupiter
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Star mass
Mass of the star Epsilon Lupi B is 7.64 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: 490 % R Sun
| 48.5 R Jupiter
(estimate)
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Star size
Radius of the star Epsilon Lupi B is not known. Its estimated value based on other similar stars is about 490 % 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: 8200 K
 (estimate)
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Star temperature
Surface temperature of Epsilon Lupi B is estimated to be 8181 K, which is 142 % 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): -6
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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Epsilon Lupi B system structure

 Epsilon Lupi Aa
Epsilon Lupi Ab
Epsilon Lupi B

More about Epsilon Lupi B

       Epsilon Lupi B can be found in southern celestial hemisphere.
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External sources
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Scientific study, Accepted: 29. 12. 2026
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A Sample of Thick-Disk Stars Hosting Hot Jupiters
Scientific study, Accepted: 16. 10. 2026
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icon study
icon study
icon study
icon study
icon study
icon study
A Spatial Map of the Atmospheric Limb of a Hot Jupiter
Scientific study, Accepted: 14. 10. 2026
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News from this star system

WASP-33 b and other hot Jupiters identified as prime targets for structural studies
iconToday
Image: WASP-33 b and other hot Jupiters identified as prime targets for structural studies
WASP-33 b, WASP-76 b, and HAT-P-32 b are identified as the best candidates for studying how stellar gravity shapes exoplanet interiors. Measuring their physical deformation will help reveal their deep, internal density structures using JWST and Ariel data....
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Atmospheric structure of WASP-94 A b revealed through new limb asymmetry method
iconToday
Image: Atmospheric structure of WASP-94 A b revealed through new limb asymmetry method
A new analysis of WASP-94 A b reveals a 415 K temperature difference between its morning and evening sides. The evening atmosphere shows signs of H2O, CO2, CO, and H2S, while the morning side remains obscured by aerosols....
Read article tag icon
Thick-disk stars identified as hosts to ancient hot jupiter planets
iconToday
Image: Thick-disk stars identified as hosts to ancient hot jupiter planets
New analysis of 268 stars identifies several hot Jupiters orbiting ancient stars in the Milky Way's thick disk. These systems, over 8 billion years old, show distinct differences in mass and orbital periods compared to younger thin-disk populations....
Read article tag icon

Frequently Asked Questions

How far is the Epsilon Lupi B system from the Sun?

The Epsilon Lupi B system is 512 light years or 157.0 parsecs from the Sun.

What galaxy is the Epsilon Lupi B star in?

The Epsilon Lupi B is in the Milky Way galaxy just like the Sun.

How many stars are in the Epsilon Lupi B system?

The Epsilon Lupi B is a single star, there are no other known stars in the system.

What type of star is the Epsilon Lupi B?

The star Epsilon Lupi B is a White-Blue star star.

What temperature is the Epsilon Lupi B?

The primary in the Epsilon Lupi B system has an effective temperature of K ( °C). Find out more about the temperature of stars in Stellar guide
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