HAT-P-13b
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.[1]
 Size comparison of HAT-P-13b with Jupiter. | |
| Discovery | |
|---|---|
| Discovered by | Bakos et al.[1] |
| Discovery site |  United States |
| Discovery date | 21 July 2009 |
| Transit Radial velocity | |
| Orbital characteristics | |
| 0.0426 AU (6,370,000 km) | |
| Eccentricity | 0.021 |
| 2.91626 d | |
| Inclination | 83.4 |
| 181 | |
| Star | HAT-P-13 |
| Physical characteristics | |
Mean radius | 1.28 RJ |
| Mass | 0.851 MJ |
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°.[2]
References
- 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.
- Obliquities of Hot Jupiter host stars: Evidence for tidal interactions and primordial misalignments, 2012, arXiv:1206.6105
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