Kepler-1704b is a super-Jupiter on a highly eccentric orbit around the star Kepler-1704. It has a mass of 4.51 MJ. The planet's distance from its star varies from 0.16 to 3.9 AU. It is a failed hot Jupiter, having been scattered from its birth orbit to orbit with a periastron just above the tidal circularization distance.[1]
| Discovery | |
|---|---|
| Discovered by | Paul A. Dalba et al. [1] |
| Discovery date | 2021 |
| Designations | |
| KOI-375.01 | |
| Orbital characteristics | |
| Periastron | 0.16 |
| Apoastron | 3.9 |
| 2.026+0.024 −0.031 AU | |
| Eccentricity | 0.921+0.010 −0.015 |
| 988.8811177±0.0009114[2] | |
| Inclination | 89.01+0.59 −0.27° |
| Physical characteristics | |
| 10.81 R🜨[2] | |
| Mass | 4.15 ± 0.29 MJ |
| Temperature | 253.8+3.7 −4.1 K[1] |
Characteristics
editKepler-1704b is much more massive than Jupiter, at 4.51 MJ.[1] The high planetary mass makes Kepler-1704b a super-Jupiter. Kepler-1704b goes on a highly eccentric 2.7 year-long (988.88 days) orbit around its star as well as transiting.[1] The extreme eccentricity yields a temperature difference of up to 700 K.[1]
Star
editThe star, Kepler-1704, is a G2, 5745-kelvin star 825 parsecs (2,690 ly) from Earth and the sun. It has a mass of 1.131 M☉, a radius of 1.697 R☉, and a luminosity of 2.83 L☉. The high radius for the star's mass hints that Kepler-1704 is not a main-sequence star.[3]
See also
editReferences
edit- ^ a b c d e f Dalba, Paul A.; Kane, Stephen R.; Li, Zhexing; Macdougall, Mason G.; Rosenthal, Lee J.; Cherubim, Collin; Isaacson, Howard; Thorngren, Daniel P.; Fulton, Benjamin; Howard, Andrew W.; Petigura, Erik A. (2021-07-14). "Giant Outer Transiting Exoplanet Mass (GOT 'EM) Survey. II. Discovery of a Failed Hot Jupiter on a 2.7 Yr, Highly Eccentric Orbit". The Astronomical Journal. 162 (4): 154. arXiv:2107.06901. Bibcode:2021AJ....162..154D. doi:10.3847/1538-3881/ac134b. S2CID 235898945.
- ^ a b "Kepler Objects of Interest". exoplanetarchive.ipac.caltech.edu. Retrieved 2021-07-25.
- ^ Dalba, Paul A.; Kane, Stephen R.; Li, Zhexing; Macdougall, Mason G.; Rosenthal, Lee J.; Cherubim, Collin; Isaacson, Howard; Thorngren, Daniel P.; Fulton, Benjamin; Howard, Andrew W.; Petigura, Erik A.; Schwieterman, Edward W.; Peluso, Dan O.; Esposito, Thomas M.; Marchis, Franck; Payne, Matthew J. (2021). "Giant Outer Transiting Exoplanet Mass (GOT 'EM) Survey. II. Discovery of a Failed Hot Jupiter on a 2.7 Yr, Highly Eccentric Orbit". The Astronomical Journal. 162 (4): 154. arXiv:2107.06901. Bibcode:2021AJ....162..154D. doi:10.3847/1538-3881/ac134b. S2CID 235898945.
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