Kepler-421

Kepler-421
Observation data
Epoch J2000      Equinox J2000
Constellation Lyra
Right ascension 18h 53m 01.6405s[1]
Declination 45° 5′ 15.977″[1]
Apparent magnitude (V) 13.56±0.04[2]
Characteristics
Evolutionary stage main sequence
Spectral type G7V or K9V[3]
Astrometry
Proper motion (μ) RA: −3.889(18) mas/yr[1]
Dec.: −20.675(19) mas/yr[1]
Parallax (π)2.9019 ± 0.0151 mas[1]
Distance1,124 ± 6 ly
(345 ± 2 pc)
Details
Mass0.76[4] M☉
Radius0.83+0.04
−0.03[5] R☉
Luminosity0.451[6] L☉
Surface gravity (log g)4.54[4] cgs
Temperature5,308±50[2] K
Metallicity [Fe/H]−0.25±0.08[2] dex
Rotation28.5±0.3 d[2]
Rotational velocity (v sin i)1.5±0.5[4] km/s
Age14.38[4] Gyr
Other designations
Gaia DR2 2106891671567353728, KOI-1274, KIC 8800954, 2MASS J18530163+4505159[7]
Database references
SIMBADdata
KICdata

Kepler-421 (KOI-1274 A) is a yellow main sequence star, being of spectral class G7V. Orange star of spectral class K9V (KOI-1274 B), projected on sky plane just 1.085″ away, is not physically associated to it.[3] The distance to star KOI-1274 A is approximately 1150 light-years, and to KOI-1274 B is about 1900 light-years.

  1. ^ a b c d Cite error: The named reference Gaia DR3 was invoked but never defined (see the help page).
  2. ^ a b c d Cite error: The named reference Kipping was invoked but never defined (see the help page).
  3. ^ a b Atkinson, Dani; Baranec, Christoph; Ziegler, Carl; Law, Nicholas; Riddle, Reed; Morton, Tim (2016), "Probability of the Physical Association of 104 Blended Companions To Kepler Objects of Interest Using Visible and Near-Infrared Adaptive Optics Photometry", The Astronomical Journal, 153: 25, arXiv:1609.09512, doi:10.3847/1538-3881/153/1/25, S2CID 119307017
  4. ^ a b c d Cite error: The named reference brewer2018 was invoked but never defined (see the help page).
  5. ^ Herman, Miranda K.; Zhu, Wei; Wu, Yanqin (2019), "Revisiting the Long-period Transiting Planets from Kepler", The Astronomical Journal, 157 (6): 248, arXiv:1901.01974, Bibcode:2019AJ....157..248H, doi:10.3847/1538-3881/ab1f70, S2CID 119550672
  6. ^ Cite error: The named reference Gaia DR2 was invoked but never defined (see the help page).
  7. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).