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HAT-P-18 B
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Star HAT-P-18 B

White dwarf HAT-P-18 B is located 527 light years away from the Sun. It is a single star, that has typically about 60 % of solar mass. For now, there are no known exoplanets in this star system.
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Sun distance
527 light years
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HAT-P-18 B

White dwarf

Location +

Distance iconDistance from the primary: 427 AU
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HAT-P-18 B system structure

 HAT-P-18 A
HAT-P-18 A b 0.06 AU 58.2 M⊕ 10.6 R⊕ 5.5 days
HAT-P-18 B 427 AU

More about HAT-P-18 B

       HAT-P-18 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 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

Atmospheric composition of hot Jupiter KELT-2A b reveals chemical history
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Image: Atmospheric composition of hot Jupiter KELT-2A b reveals chemical history
New observations of hot Jupiter KELT-2A b confirm water vapor in its atmosphere. The planet shows a carbon-to-oxygen ratio similar to its host star but with overall lower metallicity, suggesting a complex migration history from far out in its star system....
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Periodic transit timing variations measured for Neptune-like planet HAT-P-18 b
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Image: Periodic transit timing variations measured for Neptune-like planet HAT-P-18 b
New observations from the James Webb Space Telescope show periodic transit timing variations in the Neptune-like planet HAT-P-18 b. The data indicates an orbital timing shift of 92.9 seconds, providing fresh insights into the dynamics of this distant system....
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Orbital and atmospheric evolution of the mini-Neptune TOI-2257 b
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Image: Orbital and atmospheric evolution of the mini-Neptune TOI-2257 b
The exoplanet TOI-2257 b orbits its star once every 35 days with a high eccentricity. New models suggest its atmospheric and orbital fate depends on whether it is a gas-rich mini-Neptune or a rocky super-Earth. Higher eccentricity would confirm a gaseous nature....
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Frequently Asked Questions

How far is the HAT-P-18 B system from the Sun?

The HAT-P-18 B system is 527 light years or 161.6 parsecs from the Sun.

What galaxy is the HAT-P-18 B star in?

The HAT-P-18 B is in the Milky Way galaxy just like the Sun.

How many stars are in the HAT-P-18 B system?

The HAT-P-18 B is a single star, there are no other known stars in the system.

What type of star is the HAT-P-18 B?

The star HAT-P-18 B is a White dwarf star.

What temperature is the HAT-P-18 B?

The primary in the HAT-P-18 B system has an effective temperature of K ( °C). Find out more about the temperature of stars in Stellar guide
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