Kepler-19
Star in the constellation Lyra
From Wikipedia, the free encyclopedia
Kepler-19 (TYC 3134-1549-1, 2MASS J19214099+3751064, GSC 03134-01549, KOI-84)[5] is a G7V star that is host to three known planets - Kepler-19b, Kepler-19c, and Kepler-19d. It is located about 720 light-years (220 parsecs) away in the constellation Lyra, five arcminutes northwest of the much more distant open cluster NGC 6791.
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Lyra[1] |
| Right ascension | 19h 21m 40.99950s[2] |
| Declination | +37° 51′ 06.4373″[2] |
| Apparent magnitude (V) | 12.04[3] |
| Astrometry | |
| Radial velocity (Rv) | −11.36±0.53[2] km/s |
| Proper motion (μ) | RA: 25.349 mas/yr[2] Dec.: −30.792 mas/yr[2] |
| Parallax (π) | 4.5296±0.0087 mas[2] |
| Distance | 720 ± 1 ly (220.8 ± 0.4 pc) |
| Details | |
| Mass | 0.936±0.04[4] M☉ |
| Radius | 0.859±0.018[4] R☉ |
| Surface gravity (log g) | 4.54[5] cgs |
| Temperature | 5541±60[4] K |
| Metallicity [Fe/H] | −0.13±0.06[4] dex |
| Rotational velocity (v sin i) | 1.8±0.5[6] km/s |
| Age | 1.9±1.7[4] Gyr |
| Other designations | |
| KIC 2571238, KOI-84, TYC 3134-1549-1, GSC 03134-01549, 2MASS J19214099+3751064, Gaia DR2 2051106987063242880[5] | |
| Database references | |
| SIMBAD | data |
| Exoplanet Archive | data |
| KIC | data |
Planetary system
There are three known planets in the Kepler-19 planetary system. Planet b was discovered by the transit method, c by transit-timing variations[7] and d by radial velocity measurements.[8]
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b | 8.4+1.6 −1.5 M🜨 |
0.0846±0.0012 | 9.2869900 | 0.12±0.02 | 89.94+0.06 −0.44° |
2.209±0.048 R🜨 |
| c | 13.1±2.7 M🜨 | — | 28.731+0.012 −0.005 |
0.21+0.05 −0.07 |
— | — |
| d | 22.5+1.2 −5.6 M🜨 |
— | 62.95+0.04 −0.30 |
0.05+0.16 −0.01 |
— | — |
