Article · Wikipedia archive · Last revised Jul 9, 2026

Kepler-174

Kepler-174 is a K-type main-sequence star located in the Milky Way galaxy at a distance of about 1,254 light-years away from the Sun. It is located inside the boundaries of the Lyra constellation, but it is too dim to be visible to the unaided eye and is not part of the main outline.

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Jul 9, 2026
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Wikipedia ↗
Kepler-174
Observation data
Epoch J2000      Equinox J2000
Constellation Lyra1
Right ascension 19h 09m 45.40270s2
Declination +43° 49′ 55.4994″2
Apparent magnitude (V) 14.530±0.0573
Characteristics
Evolutionary stage Main sequence2
Spectral type K54
Apparent magnitude (G) 14.274±0.0032
Apparent magnitude (J) 12.791±0.0215
Apparent magnitude (H) 12.293±0.0215
Apparent magnitude (K) 12.184±0.0185
Astrometry
Radial velocity (Rv)−101.06±3.942 km/s
Proper motion (μ) RA: −38.959±0.016 mas/yr2
Dec.: −18.117±0.017 mas/yr2
Parallax (π)2.6013±0.0142 mas2
Distance1,254 ± 7 ly
(384 ± 2 pc)
Details
Mass0.710+0.041
−0.0363 M☉
Radius0.680+0.032
−0.0283 R☉
Luminosity0.1966 L☉
Surface gravity (log g)4.630+0.024
−0.0303 cgs
Temperature4724.0±25.03 K
Metallicity [Fe/H]−0.360±0.1243 dex
Rotation43.7 days7
Rotational velocity (v sin i)1.28 km/s
Age4.900+5.260
−3.1403 Gyr
Other designations
Kepler-174, KOI-518, KIC 8017703, TIC 158434144, 2MASS J19094540+43495555
Database references
SIMBADdata
Exoplanet Archivedata

Kepler-174 is a K-type main-sequence star located in the Milky Way galaxy at a distance of about 1,254 light-years (384 parsecs) away from the Sun. It is located inside the boundaries of the Lyra constellation, but it is too dim to be visible to the unaided eye and is not part of the main outline.

Planetary system

Kepler-174 has three confirmed super-Earth planets orbiting it, Kepler-174b, Kepler-174c and Kepler-174d, discovered by the Kepler space telescope using the transit method. The discovery of all three planets was announced in 2014 by a team led by Jason F. Rowe, as part of a study validating hundreds of Kepler planets.9 Kepler-174d is notable as it is within the star's habitable zone, meaning it is potentially habitable.1011

The Kepler-174 planetary system93
Companion
(in order from star) 		Mass Semimajor axis
(AU) 		Orbital period
(days) 		Eccentricity Inclination
(°) 		Radius
b — 0.100 13.981790±0.000024 — — 1.96±0.11 R🜨
c — 0.214 44.000529±0.000265 — — 1.49±0.09 R🜨
d — 0.677 247.353730±0.002001 — — 2.19±0.13 R🜨
Kepler-174 habitable zone shown12 source ↗

The planet Kepler-174d is mentioned in the Star Trek: Discovery episode, Terra Firma, Part 1.13 in which it is inhabited and is referred to as "quite beautiful".

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. "Kepler-174". NASA Exoplanet Archive. Retrieved 3 February 2023.
  4. Su, Tianhao; Zhang, Li-yun; Long, Liu; Han, Xianming L.; Misra, Prabhakar; Meng, Gang; Pi, Qingfeng; Yang, Zilu; Yang, Jiawei (2022). "Magnetic Activity and Physical Parameters of Exoplanet Host Stars Based on LAMOST DR7, TESS, Kepler, and K2 Surveys". The Astrophysical Journal Supplement Series. 261 (2): 26. Bibcode:2022ApJS..261...26S. doi:10.3847/1538-4365/ac7151.
  5. "Kepler-174". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 3 February 2023.
  6. Ostberg, Colby; Kane, Stephen R.; Li, Zhexing; Schwieterman, Edward W.; Hill, Michelle L.; Bott, Kimberly; Dalba, Paul A.; Fetherolf, Tara; Head, James W.; Unterborn, Cayman T. (2023). "The Demographics of Terrestrial Planets in the Venus Zone". The Astronomical Journal. 165 (4): 168. arXiv:2302.03055. Bibcode:2023AJ....165..168O. doi:10.3847/1538-3881/acbfaf.
  7. Mazeh, Tsevi; Perets, Hagai B.; McQuillan, Amy; Goldstein, Eyal S. (2015). "Photometric Amplitude Distribution of Stellar Rotation of KOIs—Indication for Spin-Orbit Alignment of Cool Stars and High Obliquity for Hot Stars". The Astrophysical Journal. 801 (1): 3. arXiv:1501.01288. Bibcode:2015ApJ...801....3M. doi:10.1088/0004-637X/801/1/3.
  8. Brewer, John M.; Fischer, Debra A. (2018). "Spectral Properties of Cool Stars: Extended Abundance Analysis of Kepler Objects of Interest". The Astrophysical Journal Supplement Series. 237 (2): 38. arXiv:1804.00673. Bibcode:2018ApJS..237...38B. doi:10.3847/1538-4365/aad501.
  9. Rowe, Jason F. (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): 20. arXiv:1402.6534. Bibcode:2014ApJ...784...45R. doi:10.1088/0004-637X/784/1/45. S2CID 119118620. 45.
  10. "Exoplanet-catalog". Exoplanet Exploration: Planets Beyond our Solar System.
  11. "Kepler's Tally of Planets". www.nytimes.com.
  12. "Open Exoplanet Catalogue - Kepler-174 d". www.openexoplanetcatalogue.com. Retrieved 2024-08-16.
  13. "STAR TREK: DISCOVERY Review: "Terra Firma, Part 1"". Trek Core. 10 December 2020. Retrieved 17 December 2020.