Kepler-23
Observation data
Epoch J2000      Equinox J2000
Constellation Cygnus[1]
Right ascension 19h 36m 52.5356s[2]
Declination +49° 28′ 45.253″[2]
Apparent magnitude (V) 14.0[3]
Characteristics
Spectral type G5[4]
Astrometry
Proper motion (μ) RA: 2.262±0.030[2] mas/yr
Dec.: 3.851±0.031[2] mas/yr
Parallax (π)1.1678 ± 0.0161 mas[2]
Distance2,790 ± 40 ly
(860 ± 10 pc)
Details
Mass1.11[3] M☉
Radius1.52 ± 0.24[3] R☉
Luminosity0.79 ± 0.04[3] L☉
Temperature5760 ± 124[3] K
Metallicity [Fe/H]–0.09 ± 0.14[3] dex
Other designations
Gaia DR2 2135019107451751168, KOI-168, KIC 11512246, GSC 03564-01806, 2MASS J19365254+4928452[5]
Database references
SIMBADdata
KICdata

Kepler-23 is a star in the northern constellation of Cygnus, the swan. It is orbited by three known exoplanets. With an apparent visual magnitude of 14.0,[3] this star is too faint to be seen with the naked eye.

Planetary system

Planets b and c were discovered in 2011 and were confirmed in 2012.[6] An additional planet d (Kepler-23d) was discovered in 2014, and was concluded to likely be a super-Earth.[7]

The Kepler-23 planetary system[4][8][9]
Companion
(in order from star) 		Mass Semimajor axis
(AU) 		Orbital period
(days) 		Eccentricity Inclination Radius
b 0.478+0.010
−0.0091 MJ 		0.075 7.106995 — — 0.1511±0.0068 RJ
c 0.189+0.036
−0.033 MJ 		0.099 10.742434 — — 0.278±0.0089 RJ
d 0.055+0.043
−0.037 MJ 		0.124 15.27429±0.00017 — — 0.1994±0.0079 RJ

References

  1. ^ "Cygnus – constellation boundary", The Constellations, International Astronomical Union, retrieved 2011-12-15
  2. ^ a b c d e Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
  3. ^ a b c d e f g Kepler-23b, NASA Ames Research Center, archived from the original on 2012-05-03, retrieved 2011-12-06
  4. ^ a b Schneider, Jean, "Star: Kepler-23", Extrasolar Planets Encyclopaedia, archived from the original on 2012-04-19, retrieved 2011-12-06
  5. ^ "Kepler-23". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 31 January 2018.
  6. ^ Ford, Eric B.; Fabrycky, Daniel C.; Steffen, Jason H.; Carter, Joshua A.; Fressin, Francois; Holman, Matthew J.; Lissauer, Jack J.; Moorhead, Althea V.; Morehead, Robert C.; Ragozzine, Darin; Rowe, Jason F.; Welsh, William F.; Allen, Christopher; Batalha, Natalie M.; Borucki, William J.; Bryson, Stephen T.; Buchhave, Lars A.; Burke, Christopher J.; Caldwell, Douglas A.; Charbonneau, David; Clarke, Bruce D.; Cochran, William D.; Désert, Jean-Michel; Endl, Michael; Everett, Mark E.; Fischer, Debra A.; Gautier III, Thomas N.; Gilliland, Ron L.; Jenkins, Jon M.; et al. (2012), "Transit Timing Observations Fromkepler. Ii. Confirmation of Two Multiplanet Systems Via a Non-Parametric Correlation Analysis", The Astrophysical Journal, 750 (2): 113, arXiv:1201.5409, Bibcode:2012ApJ...750..113F, doi:10.1088/0004-637X/750/2/113, S2CID 4528963
  7. ^ "Kepler-23 d Eyes on Exoplanets". exoplanets.nasa.gov/eyes-on-exoplanets. Retrieved 22 December 2023.
  8. ^ Rowe, Jason F.; Bryson, Stephen T.; Marcy, Geoffrey W.; Lissauer, Jack J.; Jontof-Hutter, Daniel; Mullally, Fergal; Gilliland, Ronald L.; Issacson, Howard; Ford, Eric; Howell, Steve B.; Borucki, William J.; Haas, Michael; Huber, Daniel; Steffen, Jason H.; Thompson, Susan E.; Quintana, Elisa; Barclay, Thomas; Still, Martin; Fortney, Jonathan; Gautier III, T. N.; Hunter, Roger; Caldwell, Douglas A.; Ciardi Edna Devore, David R.; Cochran, William; Jenkins, Jon; Agol, Eric; Carter, Joshua A.; Geary, John (2014), Validation of Kepler's Multiple Planet Candidates. III: Light Curve Analysis & Announcement of Hundreds of New Multi-planet Systems, arXiv:1402.6534, Bibcode:2014ApJ...784...45R, doi:10.1088/0004-637X/784/1/45, S2CID 119118620
  9. ^ Van Eylen, Vincent; Albrecht, Simon (2015), "Eccentricity from Transit Photometry: Small Planets in Kepler Multi-Planet Systems Have Low Eccentricities", The Astrophysical Journal, 808 (2): 126, arXiv:1505.02814, Bibcode:2015ApJ...808..126V, doi:10.1088/0004-637X/808/2/126, S2CID 14405731


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