ExoClock

The Star
Simbad GAIA 2MASS	HAT-P-19 DR2 365426679516816512 J00380401+3442416
RA	00:38:04.0136		DEC	+34:42:41.552
Parallax 4.92 mas		P.M. RA -26.775 mas/y		P.M. DEC -32.478 mas/y
Mag_V 12.901	Mag_R 12.82	Mag_I^* 11.861	Mag_J 11.095	Mag_H 10.644	Mag_K 10.546
Mag_G 12.557		Mag_{G_BP} 13.089		Mag_{G_RP} 11.896
^*Calculated from GAIA magnitudes.

Ephemeris - Verified
Kokori et al. 2021
Mid-time 2456899.49658 ± 0.0001 BJD_TDB
Period 4.0087842 ± 4e-07 days
Transit Parameters
Hartman et al. 2011
R_p/R_s 0.1418 ± 0.002	a/R_s 12.2 +0.7 -0.7		i 88.2 +0.4 -0.4 deg
R_p/R_s 0.1418 ± 0.002	e 0.07 +0.04 -0.04		ω 256.0 +77.0 -77.0 deg
Depth_R^* 26.46 mmag		Duration^* 2.87 hours
^Calculated from the other parameters, using PyLightcurve. ^*Adjusted to produce a duration that matches the observations.
Limb Darkening Parameters
Hartman et al. 2011
T_eff 4990.0 +130.0 -130.0 K	Log(g) 4.54 +0.05 -0.05 cm/s²		Fe/H 0.23 +0.08 -0.08 dex

ExoClock Status
Observing Priority ExoClock Observations (Recent) Space Observations Literature Mid-times ETD Observations O-C minutes		LOW 25 (6) 11 0.32±0.15

ExoClock Observations

Observation Date	Observer Observatory	Telescope Camera / Filter / Exp [s]	O-C minutes
2021-12-20	Paolo Arcangelo Matassa P.M.P.H.R. Deep Sky (K81)	Ritchey Chretien 40cm-F4.6 ICX453AQ / Lum / 60.0	0.1 ± 2.0
2021-12-16	Paolo Arcangelo Matassa P.M.P.H.R. Deep Sky (K81)	Ritchey Chretien 40cm-F4.6 ICX453AQ / Lum / 120.0	1.0 ± 3.2
2021-12-12	Paolo Arcangelo Matassa P.M.P.H.R. Deep Sky (K81)	Ritchey Chretien 40cm-F4.6 ICX453AQ / Lum / 120.0	-1.3 ± 2.3
2021-12-12	Andras Dan Rocca1	Celestron C8 QHY 183 M / Astrodon ExoPlanet-BB / 60.0	-3.4 ± 1.2
2021-12-12	Dominique DANIEL La Montjoie	Celestron CGX C8 XLT Camera CMOS ZWO ASI294MC pro (color) / Clear / 180.0	-4.2 ± 2.2
2021-11-10	Vikrant Kumar Agnihotri Cepheid Observatory India	C8/f6.3 Schmidt-Cassegrain Atik383L+ mono / R / 60.0	0.1 ± 2.4
2020-11-10	Yves Jongen Rasteau Observatory	Plane Wave CDK 17" SBIG STXL 11002 / Lum / 120.0	0.8 ± 0.9	- Data available
2020-11-06	Manfred Raetz privat observatory Herges-Hallenberg	SCT 280 /1790 (Celestron C11 with reducer) Moravian Instruments G2-1600 / Clear / 120.0	-1.8 ± 1.0	- Data available
2020-10-17	Jean-Bernard Pioppa La Roque-Esclapon	KEPLER ATIK 383 L+ / Clear / 240.0	2.1 ± 1.3	- Data available
2020-10-17	Yves Jongen Rasteau Observatory	Plane Wave CDK 17" SBIG STXL 11002 / Clear / 120.0	-0.6 ± 0.9	- Data available
2020-10-17	Francois Regembal HRTobs	Astrosib RC360 SBIG STX 16803 / Lum / 120.0	-1.5 ± 1.3	- Data available
2020-10-13	Fabio Mortari Osservatorio Astronomico MONTE SAN LORENZO	Ritchey Chretienne SBIG ST8-XME / Clear / 50.0	-1.4 ± 0.4	- Data available
2020-10-01	Nikolaos Paschalis Nunki Observatory	Officina Stellare RILA 400 SBIG STXL 11002 / R / 60.0	2.0 ± 3.2	- Data available
2019-10-11	Yves Jongen Rasteau Observatory	Plane Wave CDK 17" SBIG STXL 11002 / Clear / 120.0	-1.3 ± 0.9	- Data available
2019-09-17	Yves Jongen Rasteau Observatory	Plane Wave CDK 17" SBIG STXL 11002 / Clear / 120.0	1.1 ± 0.7	- Data available
2019-09-13	Marc Deldem Les Barres Observatory	Celestron C8 SBIG ST8-XME / Clear / 120.0	0.8 ± 1.0	- Data available
2019-08-31	Pavel Pintr Horni Halze	Celestron C9.25 with Hyperstar f2.2 ASI ZWO 1600 MONO / Clear / 130.0	0.0 ± 1.0	- Data available
2019-08-15	Yves Jongen Rasteau Observatory	Plane Wave CDK 17" SBIG STXL 11002 / Clear / 120.0	2.5 ± 0.9	- Data available
2016-12-22	Anaël Wünsche Observatoire des Baronnies Provençales	Astelco FLIPL230 / Lum / 120.0	-0.2 ± 0.4	- Data available
2016-12-10	Anaël Wünsche Observatoire des Baronnies Provençales	CDK Planewave SBIG STL11K / Clear / 120.0	3.0 ± 0.7	- Data available
2016-12-06	Anaël Wünsche Observatoire des Baronnies Provençales	CDK Planewave SBIG STL11K / Clear / 120.0	1.9 ± 1.0	- Data available
2016-12-02	Anaël Wünsche Observatoire des Baronnies Provençales	Astelco FLIPL230 / Lum / 60.0	1.1 ± 0.3	- Data available
2015-11-29	Anaël Wünsche Observatoire des Baronnies Provençales	CDK Planewave SBIG STL11K / Clear / 240.0	3.1 ± 1.4	- Data available
2015-11-09	Anaël Wünsche Observatoire des Baronnies Provençales	Astelco FLIPL230 / Clear / 120.0	1.9 ± 0.9	- Data available
2015-11-01	Anaël Wünsche Observatoire des Baronnies Provençales	Astelco FLIPL230 / Clear / 120.0	-0.3 ± 0.7	- Data available

Literature Mid-times

Observation Date	Mid-time	Time format	Reference	O-C minutes
2015-11-05	2457332.444435 ± 0.00029	BJD_TDB	Baștürk et al. 2020	-1.2 ± 0.4
2015-10-28	2457324.426892 ± 0.000452	BJD_TDB	Baștürk et al. 2020	-1.2 ± 0.7
2015-10-04	2457300.375138 ± 0.000249	BJD_TDB	Baștürk et al. 2020	0.2 ± 0.4
2015-09-14	2457280.330264 ± 0.000233	BJD_TDB	Baștürk et al. 2020	-1.2 ± 0.3
2014-10-05	2456935.57559 ± 0.00055	BJD_TDB	Seeliger et al. 2015	-0.1 ± 0.8
2014-08-21	2456891.479834 ± 0.000184	BJD_TDB	Baștürk et al. 2020	1.2 ± 0.3
2014-07-28	2456867.425742 ± 0.000201	BJD_TDB	Baștürk et al. 2020	-0.8 ± 0.3
2012-01-10	2455937.38829 ± 0.0001	BJD_TDB	Mallonn et al. 2015	-0.1 ± 0.1
2011-12-17	2455913.33571 ± 0.00034	BJD_TDB	Seeliger et al. 2015	0.1 ± 0.5
2011-12-09	2455905.3181 ± 0.00044	BJD_TDB	Seeliger et al. 2015	0.0 ± 0.6
2009-09-17	2455091.53417 ± 0.00034	BJD_UTC	Hartman et al. 2011	0.0 ± 0.5

HAT-P-19b

Discovered by: Hartman et al. 2011

ExoClock Observations

Literature Mid-times