Kepler-19

Kepler-19 (TYC 3134-1549-1, 2MASS J19214099+3751064, GSC 03134-01549, KOI-84)[4] is a G7V star that is host to planets Kepler-19b, Kepler-19c, and Kepler-19d. It is located five arcminutes northwest of the much more distant open cluster NGC 6791.

Kepler-19
Observation data
Epoch J2000      Equinox J2000
Constellation Lyra
Right ascension 19h 21m 40.9996s[1]
Declination +37° 51′ 06.436″[1]
Apparent magnitude (V) 12.04[2]
Astrometry
Proper motion (μ) RA: 25.284±0.033[1] mas/yr
Dec.: −30.711±0.037[1] mas/yr
Parallax (π)4.5465 ± 0.0202[1] mas
Distance717 ± 3 ly
(219.9 ± 1.0 pc)
Details
Mass0.936±0.04[3] M☉
Radius0.85±0.018[3] R☉
Surface gravity (log g)4.54[4] cgs
Temperature5541±60[3] K
Metallicity [Fe/H]-0.13[4] dex
Rotational velocity (v sin i)1.8±0.5[5] km/s
Age1.9±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
SIMBADdata
KICdata

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[6] and d by radial velocity measurements.[7]

The Kepler-19 planetary system[7]
Companion
(in order from star)		 Mass Semimajor axis
(AU)		 Orbital period
(days)		 Eccentricity Inclination Radius
b 8.4+1.6
−1.5 M⊕		 — 9.28716+0.00004
−0.00006		 0.12±0.02 89.94° 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
  1. Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
  2. 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.
  3. "Notes on Kepler-19 b". Retrieved 21 January 2017.
  4. "KOI-84". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 21 January 2017.
  5. 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.
  6. 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.
  7. 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.


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