| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Lyra |
| Right ascension | 19h 21m 40.99950s[1] |
| Declination | +37° 51′ 06.4373″[1] |
| Apparent magnitude (V) | 12.04[2] |
| Astrometry | |
| Radial velocity (Rv) | −11.36±0.53[1] km/s |
| Proper motion (μ) | RA: 25.349mas/yr[1] Dec.: −30.792mas/yr[1] |
| Parallax (π) | 4.5296±0.0087 mas[1] |
| Distance | 720 ± 1 ly (220.8 ± 0.4 pc) |
| Details | |
| Mass | 0.936±0.04[3] M☉ |
| Radius | 0.859±0.018[3] R☉ |
| Surface gravity (log g) | 4.54[4] cgs |
| Temperature | 5541±60[3] K |
| Metallicity [Fe/H] | −0.13±0.06[3] dex |
| Rotational velocity (v sin i) | 1.8±0.5[5] km/s |
| Age | 1.9±1.7[3] Gyr |
| Other designations | |
| KIC 2571238,KOI-84,TYC 3134-1549-1,GSC 03134-01549,2MASS J19214099+3751064, Gaia DR2 2051106987063242880[4] | |
| Database references | |
| SIMBAD | data |
| KIC | data |
Kepler-19 (TYC 3134-1549-1,2MASS J19214099+3751064,GSC 03134-01549,KOI-84)[4] is a G7Vstar that is host to three knownplanets -Kepler-19b,Kepler-19c, andKepler-19d. It is located about 720light-years (220parsecs) away in the constellationLyra, five arcminutes northwest of the much more distantopen clusterNGC 6791.
There are three known planets in the Kepler-19 planetary system. Planet b was discovered by thetransit method, c bytransit-timing variations[6] and d byradial velocity measurements.[7]
| 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 | — | — |
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