HAT-P-8 b
Sign in to saveHAT-P-8b is an extrasolar planet located approximately 720 light years away in the constellation of Pegasus, orbiting the 10th magnitude star GSC 02757-01152. This planet was discovered by transit on December 5, 2008. Despite the designation as HAT-P-8b, it is the 11th planet discovered by the HATNet Project. The mass of the planet is 50% more than Jupiter while the radius is also 50% more than Jupiter. The mass of this planet is exact since the inclination of the orbit is known, typical for transiting planets. This is a so-called “hot Jupiter” because this Jupiter-like gas giant planet orbits
Key facts
- Planet.name
- HAT-P-8b
- Planet.image
- Exoplanet Comparison HAT-P-8 b.png
- Planet.caption
- Size comparison of HAT-P-8b with Jupiter.
- Planet.discoverer
- HATNet Project
- Planet.discovered
- December 5, 2008
- Planet.discovery_method
- Transit
- Planet.apsis
- astron
- Planet.semimajor
- AU
- Planet.period
- d
- Planet.inclination
- 87.5
- Planet.star
- GSC 02757-01152
- Planet.mean_radius
- 1.334
via Wikipedia infobox
Exoplanet data
- Host star
- HAT-P-8
- Discovered
- 2008
- Discovered by
- HATNet
- Orbital period
- 3.08 days
- Radius
- 15.69 × Earth
- Mass
- 406.82 × Earth
- Equilibrium temp
- 1713 K
- Distance
- 211.55 pc
via NASA Exoplanet Archive
Wikidata facts
- Instance of
- star
- Constellation
- Pegasus
- Parent body
- HAT-P-8
- Radius
- +1.42
- Mass
- +1.35
- Orbital period
- +3.076318
- Image
- Exoplanet Comparison HAT-P-8 b.png
Show 2 more facts
- P6259
- J2000.0
- P1046
- transit method
via Wikidata · CC0
Article
2 sectionsContents
- References
- External links
HAT-P-8b is an extrasolar planet located approximately 720 light years away in the constellation of Pegasus, orbiting the 10th magnitude star GSC 02757-01152. This planet was discovered by transit on December 5, 2008. Despite the designation as HAT-P-8b, it is the 11th planet discovered by the HATNet Project. The mass of the planet is 50% more than Jupiter while the radius is also 50% more than Jupiter. The mass of this planet is exact since the inclination of the orbit is known, typical for transiting planets. This is a so-called “hot Jupiter” because this Jupiter-like gas giant planet orbits in a really close torch orbit around the star, making this planet extremely hot (in the order of a thousand kelvins). The distance from the star is roughly 20 times smaller than that of Earth from the Sun, which places the planet roughly 8 times closer to its star than Mercury is from the Sun. The “year” on this planet lasts only 3 days, 1 hour, 49 minutes, and 54 seconds, compared with Earth's 365 days, 6 hours, 9 minutes, and 10 seconds in a sidereal year.
The study in 2012, utilizing a Rossiter–McLaughlin effect, have determined the planetary orbit is mildly misaligned with the rotational axis of the star, misalignment equal to -17°.