Kepler-19 (TYC 3134-1549-1, 2MASS J19214099+3751064, GSC 03134-01549, KOI-84)[4] 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 |
| 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: 25.349 mas/yr[1] Dec.: −30.792 mas/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 | |
| Database references | |
| SIMBAD | data |
| KIC | data |
Planetary system
editThere are three known planets in the Kepler-19 planetary system. Planet b was discovered by the transit method, c by transit-timing variations[6] and d by radial 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 |
— | — |
References
edit- ^ a b c d e 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.
- ^ Høg, E.; et al. (2000). "The Tycho-2 catalogue of the 2.5 million brightest stars". Astronomy and Astrophysics. 355: L27–L30. Bibcode:2000A&A...355L..27H.
- ^ a b c d e f Bonomo, A. S.; Dumusque, X.; et al. (April 2023). "Cold Jupiters and improved masses in 38 Kepler and K2 small-planet systems from 3661 high-precision HARPS-N radial velocities. No excess of cold Jupiters in small-planet systems". Astronomy & Astrophysics. arXiv:2304.05773. Bibcode:2023A&A...677A..33B. doi:10.1051/0004-6361/202346211. S2CID 258078829.
- ^ a b c "KOI-84". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 21 January 2017.
- ^ Buchhave, Lars A.; et al. (2012). "An abundance of small exoplanets around stars with a wide range of metallicities". Nature. 486 (7403): 375–377. Bibcode:2012Natur.486..375B. doi:10.1038/nature11121. PMID 22722196. S2CID 4427321.
- ^ Ballard, Sarah; et al. (2011). "The Kepler-19 System: A Transiting 2.2R🜨 Planet and a Second Planet Detected Via Transit Timing Variations". The Astrophysical Journal. 743 (2). 200. arXiv:1109.1561. Bibcode:2011ApJ...743..200B. doi:10.1088/0004-637X/743/2/200.
- ^ a b Malavolta, Luca; et al. (2017). "The Kepler-19 System: A Thick-envelope Super-Earth with Two Neptune-mass Companions Characterized Using Radial Velocities and Transit Timing Variations". The Astronomical Journal. 153 (5). 224. arXiv:1703.06885. Bibcode:2017AJ....153..224M. doi:10.3847/1538-3881/aa6897.
External links
edit- NASA, Kepler mission, Table of Confirmed Planets
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