HAT-P-19
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Andromeda |
| Right ascension | 00h 38m 04.0136s[1] |
| Declination | +34° 42′ 41.5523″[1] |
| Apparent magnitude (V) | 12.901[2] |
| Characteristics | |
| Spectral type | K1V |
| Astrometry | |
| Radial velocity (Rv) | -20.27 km/s |
| Proper motion (μ) | RA: -26.775 mas/yr Dec.: -32.478 mas/yr |
| Parallax (π) | 4.92 ± 0.0355 mas[1] |
| Distance | 663 ± 5 ly (203 ± 1 pc) |
| Details[3] | |
| Mass | 0.842±0.042 M☉ |
| Radius | 0.820±0.048 R☉ |
| Luminosity | 0.37+0.08 −0.06 L☉ |
| Surface gravity (log g) | 4.47±0.05 cgs |
| Temperature | 5010±130 K |
| Metallicity | 0.23±0.08 |
| Rotation | 14.66±0.03 d |
| Rotational velocity (v sin i) | 0.7±0.5 km/s |
| Age | 8.8±5.2 Gyr |
| Other designations | |
| Database references | |
| SIMBAD | data |
HAT-P-19 is a K-type main-sequence star about 650 light-years away. The star is old yet metal enriched, having amount of heavy elements 250% of solar abundance.[3] The survey in 2012 have failed to find any stellar companions to HAT-P-19.[4]
Planetary system
In 2010 a transiting hot Saturn-sized planet was detected.[2] Its equilibrium temperature is 984±10 K,[5] and it is grey in color.[6]
The transit-timing variation measurements in 2015 and 2018 did not detect additional planets in the system.[7][8]
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b | 0.290±0.016 MJ | 0.04649± | 4.00878236+0.00000050 −0.00000049 |
0.084±0.041 | 88.67+0.41 −0.25° |
1.089±0.018 RJ |
References
- ^ a b c d HAT-P-19 -- Star
- ^ a b c HAT-P-18b and HAT-P-19b: Two Low-Density Saturn-Mass Planets Transiting Metal-Rich K Stars, 2010, arXiv:1007.4850
- ^ a b Spectroscopy of Faint Kepler Mission Exoplanet Candidate Host Stars, 2013, arXiv:1305.0578
- ^ A lucky imaging multiplicity study of exoplanet host stars, 2012, arXiv:1202.4586
- ^ a b A Holistic and Probabilistic Approach to the Ground-based Data of HAT-P-19 System, 2019, arXiv:1911.07903
- ^ Transmission spectroscopy of the inflated exo-Saturn HAT-P-19b, 2015, arXiv:1506.05685
- ^ Ground-based transit observations of the HAT-P-18, HAT-P-19, HAT-P-27/WASP40 and WASP-21 systems, 2015, arXiv:1508.06215
- ^ NEW TRANSIT TIMING OBSERVATIONS FOR GJ 436 B, HAT-P-3 B, HAT-P-19 B, WASP-3 B, AND XO-2 B, 2018, arXiv:1808.03306
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