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] |
Distance | 1,124 ± 6
ly (345 ± 2 pc) |
Details | |
Mass | 0.76 [4] M☉ |
Radius | 0.83+0.04 −0.03 [5] R☉ |
Luminosity | 0.451 [6] L☉ |
Surface gravity (log g) | 4.54 [4] cgs |
Temperature | 5,308±50 [2] K |
Metallicity [Fe/H] | −0.25±0.08 [2] dex |
Rotation | 28.5±0.3 d [2] |
Rotational velocity (v sin i) | 1.5±0.5 [4] km/s |
Age | 14.38 [4] Gyr |
Other designations | |
Database references | |
SIMBAD | data |
KIC | data |
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.
Kepler-421 has an exoplanet ( Kepler-421b), which is notable for its position near the snow line. [8]
Companion (in order from star) |
Mass |
Semimajor axis ( AU) |
Orbital period ( days) |
Eccentricity | Inclination | Radius |
---|---|---|---|---|---|---|
b | — | 1.219+0.089 −0.106 |
704.20±0.01 | 0.041+0.095 −0.034 |
89.965+0.024 −0.031 ° |
0.411+0.021 −0.016 RJ |