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HD 45166 B
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Star HD 45166 B

Wolf-Rayet star HD 45166 B is located 3276 light years away from the Sun. It is a single star, that has 203 % of solar mass. For now, there are no known exoplanets in this star system.
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Sun distance
3276 light years
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HD 45166 B

Wolf-Rayet star

Basic characteristic

icon weight
Mass: 203 % M Sun
| 2127 M Jupiter
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Star mass
Mass of the star HD 45166 B is 2.03 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: 88 % R Sun
| 8.8 R Jupiter
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Star size
Radius of the star HD 45166 B is 0.88 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
luminosity icon
Luminosity: 3.830 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

Absolute stellar magnitude in different parts of the electromagnetic spectrum from infrared (K band) to ultraviolet (U band).
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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 45166 B system structure

 HD 45166 A
HD 45166 B

More about HD 45166 B

       HD 45166 B can be found in northern 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
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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....
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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....
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Frequently Asked Questions

How far is the HD 45166 B system from the Sun?

The HD 45166 B system is 3276 light years or 1,004.5 parsecs from the Sun.

What galaxy is the HD 45166 B star in?

The HD 45166 B is in the Milky Way galaxy just like the Sun.

How many stars are in the HD 45166 B system?

The HD 45166 B is a single star, there are no other known stars in the system.

What type of star is the HD 45166 B?

The star HD 45166 B is a Wolf-Rayet star star.

What temperature is the HD 45166 B?

The primary in the HD 45166 B system has an effective temperature of K ( °C). Find out more about the temperature of stars in Stellar guide
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Estimated values
icon Objects listed in the Stellar Catalog often have values that are estimates. These estimates are determined using their known characteristics, such as spectral type, brightness across different wavelengths, distance from a star, and other factors.
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Stellar Catalog brings the stars from our galaxy to you. Discover their position, physical properties and whether there are any exoplanets or disks orbiting them. The data in Stellar Catalog come from respectable sources like Gaia space telescope, or SIMBAD database.
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