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HAT-P-13b

Size comparison of HAT-P-13b with Jupiter.
Discovery
Discovered by	Bakos et al.
Discovery site	United States
Discovery date	21 July 2009
Detection method	Transit Radial velocity
Orbital characteristics
Semi-major axis	0.0426 AU (6,370,000 km)
Eccentricity	0.021
Orbital period (sidereal)	2.91626 d
Inclination	83.4
Argument of periastron	181
Star	HAT-P-13
Physical characteristics
Mean radius	1.28 RJ
Mass	0.851 MJ

HAT-P-13b is an extrasolar planet approximately 700 light-years away in the constellation Ursa Major. The planet was discovered when it transited across its sun, HAT-P-13. This planet is a hot Jupiter with 0.851 times the mass of Jupiter and 1.28 radius. The planet has a lower mass, but its overall size is larger than Jupiter.

The study in 2012, utilizing a Rossiter–McLaughlin effect, have determined the planetary orbit is probably aligned with the rotational axis of the star, misalignment equal to 1.9±8.6°.

References

1. ^ Bakos, G. Á.; et al. (2009). "HAT-P-13b,c: A Transiting Hot Jupiter with a Massive Outer Companion on an Eccentric Orbit". The Astrophysical Journal. 707 (1): 446–456. arXiv:0907.3525. Bibcode:2009ApJ...707..446B. doi:10.1088/0004-637X/707/1/446. S2CID 7591731.
2. Albrecht, Simon; Winn, Joshua N.; Johnson, John A.; Howard, Andrew W.; Marcy, Geoffrey W.; Butler, R. Paul; Arriagada, Pamela; Crane, Jeffrey D.; Shectman, Stephen A.; Thompson, Ian B.; Hirano, Teruyuki; Bakos, Gaspar; Hartman, Joel D. (2012), "Obliquities of Hot Jupiter Host Stars: Evidence for Tidal Interactions and Primordial Misalignments", The Astrophysical Journal, 757 (1): 18, arXiv:1206.6105, Bibcode:2012ApJ...757...18A, doi:10.1088/0004-637X/757/1/18, S2CID 17174530

External links

[REDACTED] Media related to HAT-P-13b at Wikimedia Commons

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• Ursa Major
• Exoplanets discovered by HATNet
• Hot Jupiters
• Transiting exoplanets
• Exoplanets discovered in 2009
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