HAT-P-19

HAT-P-19
Observation data; Epoch J2000 Equinox J2000
Constellation	Andromeda
Right ascension	00h 38m 04.0136s
Declination	+34° 42′ 41.5523″
Apparent magnitude (V)	12.901
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
Distance	663 ± 5 ly ; (203 ± 1 pc)
Details
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
	Gaia DR2 3654266795168165128, 2MASS J00380401+3442416
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]

The HAT-P-19 planetary system^[2]^[5]
Companion (in order from star)	Mass	Semimajor axis (AU)	Orbital period (days)	Eccentricity	Inclination	Radius
b	0.290±0.016 $M$ _J	0.04649±	4.00878236^+0.00000050 _{−0.00000049}	0.084±0.041	88.67^+0.41 _−0.25°	1.089±0.018 $R$ _J

References

^ ^a ^b ^c ^d HAT-P-19 -- Star
^ ^a ^b ^c Hartman, J. D.; Bakos, G. Á.; Sato, B.; Torres, G.; Noyes, R. W.; Latham, D. W.; Kovács, G.; Fischer, D. A.; Howard, A. W.; Johnson, J. A.; Marcy, G. W.; Buchhave, L. A.; Füresz, G.; Perumpilly, G.; Béky, B.; Stefanik, R. P.; Sasselov, D. D.; Esquerdo, G. A.; Everett, M.; Csubry, Z.; Lázár, J.; Papp, I.; Sári, P. (2010), "HAT-P-18b and HAT-P-19b: Two Low-Density Saturn-Mass Planets Transiting Metal-Rich K Stars", The Astrophysical Journal, 726: 52, arXiv:1007.4850, doi:10.1088/0004-637X/726/1/52, S2CID 10896305
^ ^a ^b Everett, Mark E.; Howell, Steve B.; Silva, David R.; Szkody, Paula (2013), "Spectroscopy of Faint Kepler Mission Exoplanet Candidate Host Stars", The Astrophysical Journal, 771 (2): 107, arXiv:1305.0578, doi:10.1088/0004-637X/771/2/107, S2CID 119270620
^ Ginski, C.; Mugrauer, M.; Seeliger, M.; Eisenbeiss, T. (2012), "A lucky imaging multiplicity study of exoplanet host stars", Monthly Notices of the Royal Astronomical Society, 421 (3): 2498–2509, arXiv:1202.4586, doi:10.1111/j.1365-2966.2012.20485.x, S2CID 118573795{{citation}}: CS1 maint: unflagged free DOI (link)
^ ^a ^b Basturk, Ozgur; Yalcinkaya, Selcuk; Esmer, Ekrem M.; Tanriverdi, Taner; Keten, Burak (2019), A Holistic and Probabilistic Approach to the Ground-based Data of HAT-P-19 System, arXiv:1911.07903, doi:10.1093/mnras/staa1758, S2CID 208158330{{citation}}: CS1 maint: unflagged free DOI (link)
^ Mallonn, M.; von Essen, C.; Weingrill, J.; Strassmeier, K. G.; Ribas, I.; Carroll, T. A.; Herrero, E.; Granzer, T.; Claret, A.; Schwope, A. (2015), "Transmission spectroscopy of the inflated exo-Saturn HAT-P-19b", Astronomy & Astrophysics, 580: A60, arXiv:1506.05685, doi:10.1051/0004-6361/201423778, S2CID 91175943
^ Seeliger, M.; Kitze, M.; Errmann, R.; Richter, S.; Ohlert, J. M.; Chen, W. P.; Guo, J. K.; Göğüş, E.; Güver, T.; Aydın, B.; Mottola, S.; Hellmich, S.; Fernandez, M.; Aceituno, F. J.; Dimitrov, D.; Kjurkchieva, D.; Jensen, E.; Cohen, D.; Kundra, E.; Pribulla, T.; Vaňko, M.; Budaj, J.; Mallonn, M.; Wu, Z.-Y.; Zhou, X.; Raetz, St.; Adam, C.; Schmidt, T. O. B.; Ide, A.; et al. (2015), "Ground-based transit observations of the HAT-P-18, HAT-P-19, HAT-P-27/WASP40 and WASP-21 systems", Monthly Notices of the Royal Astronomical Society, 451 (4): 4060–4072, arXiv:1508.06215, doi:10.1093/mnras/stv1187, S2CID 56034663{{citation}}: CS1 maint: unflagged free DOI (link)
^ MacIejewski, G.; Stangret, M.; Ohlert, J.; Basaran, Ç.S.; MacIejczak, J.; Puciata-Mroczynska, M.; Boulanger, E. (2018), "New transit timing observations for GJ 436 b, HAT-P-3 b, HAT-P-19 b, WASP-3 b, and XO-2 B", Information Bulletin on Variable Stars (6243), arXiv:1808.03306, doi:10.22444/IBVS.6243, S2CID 118872603

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[simbad-1] HAT-P-19 -- Star

[Hartman2010-2] Hartman, J. D.; Bakos, G. Á.; Sato, B.; Torres, G.; Noyes, R. W.; Latham, D. W.; Kovács, G.; Fischer, D. A.; Howard, A. W.; Johnson, J. A.; Marcy, G. W.; Buchhave, L. A.; Füresz, G.; Perumpilly, G.; Béky, B.; Stefanik, R. P.; Sasselov, D. D.; Esquerdo, G. A.; Everett, M.; Csubry, Z.; Lázár, J.; Papp, I.; Sári, P. (2010), "HAT-P-18b and HAT-P-19b: Two Low-Density Saturn-Mass Planets Transiting Metal-Rich K Stars", The Astrophysical Journal, 726: 52, arXiv:1007.4850, doi:10.1088/0004-637X/726/1/52, S2CID 10896305

[Everett2013-3] Everett, Mark E.; Howell, Steve B.; Silva, David R.; Szkody, Paula (2013), "Spectroscopy of Faint Kepler Mission Exoplanet Candidate Host Stars", The Astrophysical Journal, 771 (2): 107, arXiv:1305.0578, doi:10.1088/0004-637X/771/2/107, S2CID 119270620

[4] Ginski, C.; Mugrauer, M.; Seeliger, M.; Eisenbeiss, T. (2012), "A lucky imaging multiplicity study of exoplanet host stars", Monthly Notices of the Royal Astronomical Society, 421 (3): 2498–2509, arXiv:1202.4586, doi:10.1111/j.1365-2966.2012.20485.x, S2CID 118573795{{citation}}: CS1 maint: unflagged free DOI (link)

[Basturk2019-5] Basturk, Ozgur; Yalcinkaya, Selcuk; Esmer, Ekrem M.; Tanriverdi, Taner; Keten, Burak (2019), A Holistic and Probabilistic Approach to the Ground-based Data of HAT-P-19 System, arXiv:1911.07903, doi:10.1093/mnras/staa1758, S2CID 208158330{{citation}}: CS1 maint: unflagged free DOI (link)

[6] Mallonn, M.; von Essen, C.; Weingrill, J.; Strassmeier, K. G.; Ribas, I.; Carroll, T. A.; Herrero, E.; Granzer, T.; Claret, A.; Schwope, A. (2015), "Transmission spectroscopy of the inflated exo-Saturn HAT-P-19b", Astronomy & Astrophysics, 580: A60, arXiv:1506.05685, doi:10.1051/0004-6361/201423778, S2CID 91175943

[7] Seeliger, M.; Kitze, M.; Errmann, R.; Richter, S.; Ohlert, J. M.; Chen, W. P.; Guo, J. K.; Göğüş, E.; Güver, T.; Aydın, B.; Mottola, S.; Hellmich, S.; Fernandez, M.; Aceituno, F. J.; Dimitrov, D.; Kjurkchieva, D.; Jensen, E.; Cohen, D.; Kundra, E.; Pribulla, T.; Vaňko, M.; Budaj, J.; Mallonn, M.; Wu, Z.-Y.; Zhou, X.; Raetz, St.; Adam, C.; Schmidt, T. O. B.; Ide, A.; et al. (2015), "Ground-based transit observations of the HAT-P-18, HAT-P-19, HAT-P-27/WASP40 and WASP-21 systems", Monthly Notices of the Royal Astronomical Society, 451 (4): 4060–4072, arXiv:1508.06215, doi:10.1093/mnras/stv1187, S2CID 56034663{{citation}}: CS1 maint: unflagged free DOI (link)

[8] MacIejewski, G.; Stangret, M.; Ohlert, J.; Basaran, Ç.S.; MacIejczak, J.; Puciata-Mroczynska, M.; Boulanger, E. (2018), "New transit timing observations for GJ 436 b, HAT-P-3 b, HAT-P-19 b, WASP-3 b, and XO-2 B", Information Bulletin on Variable Stars (6243), arXiv:1808.03306, doi:10.22444/IBVS.6243, S2CID 118872603

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Observation data Epoch J2000 Equinox J2000
Constellation	Andromeda
Right ascension	00^h 38^m 04.0136^s^[1]
Declination	+34° 42′ 41.5523″^[1]
Apparent magnitude (V)	12.901^[2]
Characteristics
Spectral type	K1V
Astrometry

Radial velocity (R_v)	-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
Gaia DR2 3654266795168165128, 2MASS J00380401+3442416^[1]
Database references
SIMBAD	data