Astronomy:Kepler-167
Kepler-167 is a K-type main-sequence star located about 1,119 light-years (343 pc) away from the Solar System in the constellation of Cygnus. The star has about 78% the mass and 75% the radius of the Sun, and a temperature of 4,884 K (4,611 °C; 8,332 °F). It hosts a system of four known exoplanets. There is also a companion red dwarf star at a separation of about 700 astronomical unit|AU, with an estimated orbital period of over 15,000 years.[1]
Planetary system
Kepler-167 is orbited by four known transiting exoplanets, discovered using the Kepler space telescope. The inner three planets are all super-Earths of unknown composition orbiting closer to their star than Mercury is to the Sun. The outermost planet, Kepler-167e, is a Jupiter analog, with 0.91 |♃|J}}}}}}, 1.01 |♃|J}}}}}}, and an equilibrium temperature of 134 K (−139 °C; −218 °F). It is the first transiting Jupiter analog discovered.[2][1]
The inner two planets were confirmed in 2014, as part of a study validating hundreds of Kepler planets,[3] and the outer two planets were confirmed in 2016.[2] Observations of Kepler-167e using the Spitzer Space Telescope, published in 2019, ruled out significant transit timing variations, making it easier to predict future transits and plan follow-up observations. As a rare example of a long-period transiting gas giant, Kepler-167e is a target of interest for further observations, for example to characterize its atmosphere.[4] As of 2022[update], four transits of planet e have been detected, with both space-based and ground-based observations.[5]
In 2025, There was a search of exomoons around the exoplanet Kepler-167e by astronomer David Kipping and his team using JWST with some results but no conclusion was reached.[6][7]
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b | — | 0.04825±0.00070 | 4.3931539+0.0000048 −0.0000046 |
0 | 88.3+1.6 −1.2° |
1.718±0.070 R⊕ |
| c | — | 0.0684±0.0010 | 7.406106±0.000010 | 0 | 88.48+0.88 −1.0° |
1.674±0.069 R⊕ |
| d | — | 0.1404±0.0020 | 21.80379+0.00013 −0.00018 |
0 | 89.26±0.50° | 1.238±0.064 R⊕ |
| e | 1.01+0.16 −0.15 MJ |
1.883±0.027 | 1071.23205+0.00059 −0.00058 |
0.062+0.104 −0.043[2] |
89.9720+0.0069 −0.0079° |
0.9064±0.0375 RJ |
References
- ↑ 1.0 1.1 1.2 Chachan, Yayaati et al. (February 2022). "Kepler-167e as a Probe of the Formation Histories of Cold Giants with Inner Super-Earths". The Astrophysical Journal 926 (1): 62. doi:10.3847/1538-4357/ac3ed6. Bibcode: 2022ApJ...926...62C.
- ↑ 2.0 2.1 2.2 Kipping, David M. et al. (April 2016). "A Transiting Jupiter Analog". The Astrophysical Journal 820 (2): 112. doi:10.3847/0004-637X/820/2/112. Bibcode: 2016ApJ...820..112K.
- ↑ Rowe, Jason F. et al. (March 2014). "Validation of Kepler's Multiple Planet Candidates. III. Light Curve Analysis and Announcement of Hundreds of New Multi-planet Systems". The Astrophysical Journal 784 (1): 45. doi:10.1088/0004-637X/784/1/45. Bibcode: 2014ApJ...784...45R.
- ↑ Dalba, Paul A.; Tamburo, Patrick (March 2019). "Spitzer Detection of the Transiting Jupiter-analog Exoplanet Kepler-167e". The Astrophysical Journal Letters 873 (2): L17. doi:10.3847/2041-8213/ab0bb4. Bibcode: 2019ApJ...873L..17D.
- ↑ Perrocheau, Amaury et al. (December 2022). "A 16 Hour Transit of Kepler-167 e Observed by the Ground-based Unistellar Telescope Network". The Astrophysical Journal Letters 940 (2): L39. doi:10.3847/2041-8213/aca073. Bibcode: 2022ApJ...940L..39P.
- ↑ Kipping, David; Cassese, Ben; Changeat, Quentin; Yahalomi, Daniel; Teachey, Alex; Edwards, Billy (2025-11-19). "A JWST Transit of a Jupiter Analog: II. A Search for Exomoons". arXiv:2511.15317 [astro-ph.EP].
- ↑ Cassese, Ben; Kipping, David; Changeat, Quentin; Yahalomi, Daniel A.; Vega, Justin; Chachan, Yayaati; Edwards, Billy; Teachey, Alex (2025-11-03). "A JWST Transit of a Jupiter Analog I: Constraints on the Oblateness of Kepler-167e". arXiv:2511.02067 [astro-ph.EP].
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