Kepler-167
Observation data
Epoch J2000      Equinox J2000
Constellation Cygnus[1]
Right ascension 19h 30m 38.02619s[2]
Declination +38° 20′ 43.4372″[2]
Apparent magnitude (V) 14.284±0.126[3]
Characteristics
Evolutionary stage Main sequence
Spectral type K3-K4[4] + M4V[5]
Apparent magnitude (V) 14.284±0.126[3]
Apparent magnitude (G) 13.988±0.003[2]
Apparent magnitude (J) 12.446±0.022[6]
Apparent magnitude (H) 11.974±0.023[6]
Apparent magnitude (K) 11.832±0.022[6]
Astrometry
Radial velocity (Rv)−26.79±2.21[2] km/s
Proper motion (μ) RA: 15.097 mas/yr[2]
Dec.: 36.352 mas/yr[2]
Parallax (π)2.9157 ± 0.0131 mas[2]
Distance1,119 ± 5 ly
(343 ± 2 pc)
Absolute magnitude (MV)6.53±0.12[4]
Details[5]
Mass0.777+0.034
−0.031 M☉
Radius0.749±0.020 R☉
Luminosity (bolometric)0.289+0.017
−0.020 L☉
Surface gravity (log g)4.579+0.027
−0.025 cgs
Temperature4884+69
−75 K
Metallicity [Fe/H]0.020±0.067 dex
Rotational velocity (v sin i)<2[4] km/s
Age7.1+4.4
−4.6 Gyr
Other designations
Kepler-167, KOI-490, KIC 3239945, TIC 137686948, 2MASS J19303802+3820434[6]
Database references
SIMBADdata

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 AU, with an estimated orbital period of over 15,000 years.[5]

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 RJ, 1.01 MJ, and an equilibrium temperature of 134 K (−139 °C; −218 °F). It is the first transiting Jupiter analog discovered.[4][5]

The inner two planets were confirmed in 2014, as part of a study validating hundreds of Kepler planets,[7] and the outer two planets were confirmed in 2016.[4] 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.[8] As of 2022, four transits of planet e have been detected, with both space-based and ground-based observations.[9]

The Kepler-167 planetary system[5]
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[4] 		89.9720+0.0069
−0.0079° 		0.9064±0.0375 RJ

References

  1. ^ "Finding the constellation which contains given sky coordinates". djm.cc. 2 August 2008.
  2. ^ a b c d e f Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv:2208.00211. Bibcode:2023A&A...674A...1G. doi:10.1051/0004-6361/202243940. S2CID 244398875. Gaia DR3 record for this source at VizieR.
  3. ^ a b "Kepler-167". NASA Exoplanet Archive. Retrieved 7 November 2022.
  4. ^ a b c d e f Kipping, David M.; Torres, Guillermo; et al. (April 2016). "A Transiting Jupiter Analog". The Astrophysical Journal. 820 (2): 112. arXiv:1603.00042. Bibcode:2016ApJ...820..112K. doi:10.3847/0004-637X/820/2/112. S2CID 1892262.
  5. ^ a b c d e Chachan, Yayaati; Dalba, Paul A.; 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. arXiv:2112.00747. Bibcode:2022ApJ...926...62C. doi:10.3847/1538-4357/ac3ed6. S2CID 244799213.
  6. ^ a b c d "Kepler-167". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 7 November 2022.
  7. ^ Rowe, Jason F.; Bryson, Stephen T.; 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. arXiv:1402.6534. Bibcode:2014ApJ...784...45R. doi:10.1088/0004-637X/784/1/45. S2CID 119118620.
  8. ^ Dalba, Paul A.; Tamburo, Patrick (March 2019). "Spitzer Detection of the Transiting Jupiter-analog Exoplanet Kepler-167e". The Astrophysical Journal Letters. 873 (2): L17. arXiv:1903.01478. Bibcode:2019ApJ...873L..17D. doi:10.3847/2041-8213/ab0bb4. S2CID 119473483.
  9. ^ Perrocheau, Amaury; Esposito, Thomas M.; 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. arXiv:2211.01532. Bibcode:2022ApJ...940L..39P. doi:10.3847/2041-8213/aca073. S2CID 253265546.
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