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 (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.

Kepler-174
Observation data
Epoch J2000      Equinox J2000
Constellation Lyra[1]
Right ascension 19h 09m 45.40270s[2]
Declination +43° 49′ 55.4994″[2]
Apparent magnitude (V) 14.530±0.057[3]
Characteristics
Evolutionary stage Main sequence
Spectral type K
Apparent magnitude (G) 14.274±0.003[2]
Apparent magnitude (J) 12.791±0.021[4]
Apparent magnitude (H) 12.293±0.021[4]
Apparent magnitude (K) 12.184±0.018[4]
Astrometry
Radial velocity (Rv)−101.06±3.94[2] km/s
Proper motion (μ) RA: −38.959±0.016 mas/yr[2]
Dec.: −18.117±0.017 mas/yr[2]
Parallax (π)2.6013 ± 0.0142 mas[2]
Distance1,254 ± 7 ly
(384 ± 2 pc)
Details[3]
Mass0.710+0.041
−0.036 M☉
Radius0.680+0.032
−0.028 R☉
Surface gravity (log g)4.630+0.024
−0.030 cgs
Temperature4724.0±25.0 K
Metallicity [Fe/H]−0.360±0.124 dex
Age4.900+5.260
−3.140 Gyr
Other designations
Kepler-174, KOI-518, KIC 8017703, TIC 158434144, 2MASS J19094540+4349555[4]
Database references
SIMBADdata

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.[5] Kepler-174d is notable as it is within the star's habitable zone, meaning it is potentially habitable.[6][7]

The Kepler-174 planetary system[5][3]
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 shown

The planet Kepler-174d is mentioned in the Star Trek: Discovery episode, Terra Firma, Part 1.[8] in which it is inhabited and is referred to as "quite beautiful".

References
  1. "Finding the constellation which contains given sky coordinates". djm.cc. 2 August 2008.
  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. "Kepler-174". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 3 February 2023.
  5. 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.
  6. "Exoplanet-catalog". Exoplanet Exploration: Planets Beyond our Solar System.
  7. "Kepler's Tally of Planets". www.nytimes.com.
  8. "STAR TREK: DISCOVERY Review: "Terra Firma, Part 1"". Trek Core. 10 December 2020. Retrieved 17 December 2020.
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