Article · Wikipedia archive · Last revised Jul 3, 2026

Kepler-29

Kepler-29 is a Sun-like star in the northern constellation of Cygnus. It is located at the celestial coordinates: Right Ascension 19h 53m 23.6018s, Declination +47° 29′ 28.437″. With an apparent visual magnitude of 15.456, this star is too faint to be seen with the naked eye. It is a solar analog, having a close mass, radius, and temperature as the Sun. Currently the age of the star has not been determined due to its 2780 light-year distance. As of 2016 no Jovian exoplanets of 0.9–1.4 MJ have been found at a distance of 5 AU.

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Kepler-29
Observation data
Epoch J2000      Equinox J2000
Constellation Cygnus1
Right ascension 19h 53m 23.6018s2
Declination +47° 29′ 28.437″2
Apparent magnitude (V) 15.456±0.0253
Characteristics
Evolutionary stage main sequence2
Spectral type G5V4
Astrometry
Proper motion (μ) RA: 6.487(29) mas/yr2
Dec.: 16.183(24) mas/yr2
Parallax (π)1.1276±0.0229 mas2
Distance2,890 ± 60 ly
(890 ± 20 pc)
Details
Mass0.761+0.024
−0.0285 M☉
Radius0.732+0.033
−0.0315 R☉
Luminosity0.436 L☉
Surface gravity (log g)4.6±0.15 cgs
Temperature5378±605 K
Metallicity [Fe/H]−0.44±0.045 dex
Rotation10.34 days7
Rotational velocity (v sin i)1.18 km/s
Age7.18 Gyr
Other designations
KOI-738, KIC 205071984, 2MASS J19532359+4729284, Gaia DR2 20864351890173872649
Database references
SIMBADdata
KICdata

Kepler-29 is a Sun-like star in the northern constellation of Cygnus. It is located at the celestial coordinates: Right Ascension 19h 53m 23.6018s, Declination +47° 29′ 28.437″.2 With an apparent visual magnitude of 15.456,3 this star is too faint to be seen with the naked eye. It is a solar analog, having a close mass, radius, and temperature as the Sun. Currently the age of the star has not been determined due to its 2780 light-year (850 parsecs) distance. As of 2016 no Jovian exoplanets of 0.9–1.4 MJ have been found at a distance of 5 AU. 10

Planetary system

In 2011 an analysis of the first four months of data from the Kepler space telescope detected 1235 planetary candidates two of which orbited this star.11 Later study of the transit-timing variations of the system lead to the confirmation of both planets.12 The planetary orbits are lying in Orbital resonance to each other, with orbital period ratio being exactly 7:9.13

The Kepler-29 planetary system125
Companion
(in order from star) 		Mass Semimajor axis
(AU) 		Orbital period
(days) 		Eccentricity Inclination
(°) 		Radius
b 5.0+1.5
−1.3 M🜨 		0.09 10.33966+0.00015
−0.00017 		— — 2.55±0.12 R🜨
c 4.5±1.1 M🜨 0.11 13.28633+0.00031
−0.00027 		— — 2.34+0.12
−0.11 R🜨
References

References

  1. Roman, Nancy G. (1987). "Identification of a constellation from a position". Publications of the Astronomical Society of the Pacific. 99 (617): 695. Bibcode:1987PASP...99..695R. doi:10.1086/132034. Constellation record for this object at VizieR.
  2. 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. Henden, A. A.; et al. (2016). "VizieR Online Data Catalog: AAVSO Photometric All Sky Survey (APASS) DR9 (Henden+, 2016)". VizieR On-line Data Catalog: II/336. Originally Published in: 2015AAS...22533616H. 2336. Bibcode:2016yCat.2336....0H.Vizier catalog entry
  4. Schneider, Jean, "Star: Kepler-29", Extrasolar Planets Encyclopaedia, archived from the original on 2012-04-26, retrieved 2011-12-06
  5. Vissapragada, Shreyas; et al. (2020). "Diffuser-assisted Infrared Transit Photometry for Four Dynamically Interacting Kepler Systems". The Astronomical Journal. 159 (3). 108. arXiv:1907.04445. Bibcode:2020AJ....159..108V. doi:10.3847/1538-3881/ab65c8. S2CID 195874295.
  6. Loyd, R. O. Parke; Shkolnik, Evgenya L.; Schneider, Adam C.; Richey-Yowell, Tyler; Barman, Travis S.; Peacock, Sarah; Pagano, Isabella (2020). "Current Population Statistics do Not Favor Photoevaporation over Core-powered Mass Loss as the Dominant Cause of the Exoplanet Radius Gap". The Astrophysical Journal. 890 (1): 23. arXiv:1912.12305. Bibcode:2020ApJ...890...23L. doi:10.3847/1538-4357/ab6605.
  7. Su, Tianhao; Zhang, Liyun; Han, Xianming L.; Misra, Prabhakar; Zhu, Zhongzhong; Pi, Qingfeng (2025). "Stellar magnetic activity in Earth 2.0 candidates based on LAMOST DR10". Astronomy and Astrophysics. 694: A157. Bibcode:2025A&A...694A.157S. doi:10.1051/0004-6361/202452042.
  8. Petigura, Erik A.; Rogers, James G.; Isaacson, Howard; Owen, James E.; Kraus, Adam L.; Winn, Joshua N.; MacDougall, Mason G.; Howard, Andrew W.; Fulton, Benjamin; Kosiarek, Molly R.; Weiss, Lauren M.; Behmard, Aida; Blunt, Sarah (2022). "The California-Kepler Survey. X. The Radius Gap as a Function of Stellar Mass, Metallicity, and Age". The Astronomical Journal. 163 (4): 179. arXiv:2201.10020. Bibcode:2022AJ....163..179P. doi:10.3847/1538-3881/ac51e3.
  9. "Kepler-29". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2020-08-06.
  10. Open Exoplanet Catalogue, Kepler-29
  11. Borucki, William J.; et al. (2011). "Characteristics of Planetary Candidates Observed by Kepler. II. Analysis of the First Four Months of Data". The Astrophysical Journal. 736 (1). 19. arXiv:1102.0541. Bibcode:2011ApJ...736...19B. doi:10.1088/0004-637X/736/1/19.
  12. Fabrycky, Daniel C.; et al. (2012). "Transit Timing Observations from Kepler. IV. Confirmation of Four Multiple-planet Systems by Simple Physical Models". The Astrophysical Journal. 750 (2). 114. arXiv:1201.5415. Bibcode:2012ApJ...750..114F. doi:10.1088/0004-637X/750/2/114.
  13. Panichi, Federico; Goździewski, Krzyszof; Turchetti, Giorgio (2017), "The Reversibility Error Method (REM): a new, dynamical fast indicator for planetary dynamics", Monthly Notices of the Royal Astronomical Society, 468: 469–491, arXiv:1703.10596, doi:10.1093/mnras/stx374, S2CID 119391438