Kepler-17b
Kepler-17b is a planet in the orbit of star Kepler-17, first observed by the Kepler spacecraft observatory in 2011. Kepler-17b is a gas giant nearly 2.45 times the mass of Jupiter, and is sometimes described as a "super-Jupiter".
The planet is likely to be tidally locked to the parent star. In 2015, the planetary nightside temperature was estimated to be equal to 2229+50
−58 K.[2]
| Discovery | |
|---|---|
| Discovered by | Aldo S. Bonomo et al. |
| Discovery date | 25 October 2011 |
| Transit method | |
| Orbital characteristics | |
| 0.0268 ± 0.0005 AU (4,009,000 ± 75,000 km)[1] | |
| 1.4857108 ± 0.0000002[1] d | |
| Inclination | 87.22 ± 0.15[1] |
| Star | Kepler-17 |
| Physical characteristics | |
Mean radius | 1.33 ± 0.04[1] RJ |
| Mass | 2.47 ± 0.10[1] MJ |
Mean density | 1.30 ± 0.14 g/cm3 (0.0470 ± 0.0051 lb/cu in)[1] |
| 3.54 ± 0.03 m/s2 (11.614 ± 0.098 ft/s2)[1] | |
| Temperature | 2229+50 −58 K.[2] |
The study in 2012, utilizing a Rossiter–McLaughlin effect, have determined the planetary orbit is probably aligned with the equatorial plane of the star, misalignment equal to 0±15°.[3]
References
- Bonomo, A. S.; Hébrard, G.; Santerne, A.; Santos, N. C.; Deleuil, M.; Almenara, J.; Bouchy, F.; Díaz, R. F.; Moutou, C.; Vanhuysse, M. (2012). "SOPHIE velocimetry of Keplertransit candidates". Astronomy & Astrophysics. 538: A96. arXiv:1110.5462. Bibcode:2012A&A...538A..96B. doi:10.1051/0004-6361/201118323.
- A Comprehensive Study of Kepler Phase Curves and Secondary Eclipses:Temperatures and Albedos of Confirmed Kepler Giant Planets
- Obliquities of Hot Jupiter host stars: Evidence for tidal interactions and primordial misalignments, 2012, arXiv:1206.6105
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