ExoClock

The Star
Simbad GAIA 2MASS	HAT-P-25 DR2 111322601672419712 J03134450+2511506
RA	03:13:44.4981		DEC	+25:11:50.687
Parallax 3.301 mas		P.M. RA 13.49 mas/y		P.M. DEC -13.586 mas/y
Mag_V 13.15	Mag_R 13.22	Mag_I 11.98	Mag_J 11.319	Mag_H 10.908	Mag_K 10.815
Mag_G 12.842		Mag_{G_BP} 13.38		Mag_{G_RP} 12.172
^*Calculated from GAIA magnitudes.

Ephemeris - Verified
Kokori et al. 2022
Mid-time 2457759.39314 ± 0.00015 BJD_TDB
Period 3.65281524 ± 3.7e-07 days
Transit Parameters
Wang et al. 2018
R_p/R_s 0.1269 ± 0.0011	a/R_s 10.9 +0.3 -0.3		i 88.2 +0.5 -0.4 deg
R_p/R_s 0.1269 ± 0.0011	e 0.023 +0.022 -0.014		ω 287.0 +52.0 -17.0 deg
Depth_R^* 21.08 mmag		Duration^* 2.81 hours
^Calculated from the other parameters, using PyLightcurve. ^*Adjusted based on the space observations.
Limb Darkening Parameters
Quinn et al. 2012
T_eff 5500.0 +80.0 -80.0 K	Log(g) 4.48 +0.04 -0.04 cm/s²		Fe/H 0.31 +0.08 -0.08 dex

ExoClock Status
Observing Priority		LOW
Minimum aperture		8.53"
Total Observations (Recent)		55 (5)
O-C		-1.78 ± 0.34 minutes
ExoClock Observations (Recent)		24 (5)
Space Observations (Recent)		17 (0)
ETD Observations (Recent)		0 (0)
Literature Mid-times (Recent)		14 (0)
Kepler R_p/R_s		-
TESS R_p/R_s		0.12689 ± 0.00064

Planet Observation Date	Observer Observatory	Telescope Camera / Filter / Exp [s]	O-C minutes
ExoClock Observations
HAT-P-25b (LOW) 2024-12-29	Yves Jongen Rasteau Observatory	Plane Wave CDK 17" SBIG STXL 11002 / Lum / 180.0	-2.13 ± 0.56
HAT-P-25b (LOW) 2024-12-29	Massimiliano Mannucci Osservatorio Astronomico Margherita Hack	Celestron C14 SBIG ST10 XME / R / 300.0	-2.78 ± 0.94
HAT-P-25b (LOW) 2024-12-29	Francesco Scaggiante Gruppo Astrofili Salese "GALILEO GALILEI"	NEWTON 410/1710 Player One Astronomy Poseidon-M Pro (IMX571) / rpr / 90.0	-5.91 ± 2.45
HAT-P-25b (LOW) 2024-11-30	Yen-Hsing Lin Starry House Observatory	Mewlon 300 CRS ASI 6200MM Pro / Lum / 60.0	-1.81 ± 0.79
HAT-P-25b (LOW) 2024-10-28	Yen-Hsing Lin Starry House Observatory	Mewlon 300 CRS ASI 6200MM Pro / Lum / 120.0	-0.57 ± 1.15
HAT-P-25b (LOW) 2024-01-10	Lee YuHsien KMSH Observatory	C14HD QSI-660 / Clear / 30.0	-4.09 ± 1.37
HAT-P-25b (LOW) 2023-12-15	Marc Serrau A77 - Dauban	Meade SC 12" QHY260MM / rpr / 300.0	0.55 ± 1.73
HAT-P-25b (LOW) 2023-12-04	Snaevarr Guðmundsson Ness Observatory	Meade LX 200 ACF Schmidt-Cassegrain SBIG STL 11000M / AstrodonExoPlanet-BB / 120.0	-0.22 ± 1.38
HAT-P-25b (LOW) 2023-11-05	Vikrant Kumar Agnihotri Cepheid Observatory India	C11/f5.5 Schmidt-Cassegrain Atik383L+ mono / Clear / 120.0	-2.81 ± 1.87
HAT-P-25b (LOW) 2023-08-21	Bernhard Wenzel Volkssternwarte Kirchheim	CAS A=60cm / F=1,8m SBIG STL-6303-3 CCD 3072 x 2048 Pixels (9µm) / R / 60.0	4.28 ± 1.87
HAT-P-25b (LOW) 2023-08-21	Jean-Baptiste Marquette MrKite47	Newton Sky-Watcher 200/1000 ZWO ASI183MM Pro / R / 600.0	2.41 ± 4.18
HAT-P-25b (LOW) 2023-01-24	Adrian Jones Private Observatory (I64)	Meade ACF 30cm QSI 583 / R / 200.0	-2.53 ± 2.02
HAT-P-25b (LOW) 2022-01-20	Marc Serrau A77 Dauban	Celestron 11 ST8-XME / R / 60.0	-2.91 ± 2.59
HAT-P-25b (LOW) 2021-10-25	Steven Peterson Vail View Observatory H18	GSO 10" RC f/8.0 SBIG STL6303E / I / 240.0	0.5 ± 1.87
HAT-P-25b (LOW) 2021-10-17	Fabio Mortari Hypatia Observatory	Ritchey Chretienne 250mm f/5.3 Sbig ST8-XE / R / 200.0	-3.06 ± 2.74
HAT-P-25b (LOW) 2021-10-03	Yves Jongen Deep Sky Chile	Plane Wave CDK 17" Moravian 4G / Lum / 120.0	-0.52 ± 1.15
HAT-P-25b (LOW) 2021-09-15	Adam Popowicz Observatory Pyskowice	RC12" GSO ASI ZWO 1600 MM / ATIK 11000M / Clear / 480.0	2.18 ± 4.32
HAT-P-25b (LOW) 2021-09-15	Dim Stouraitis Galilaios	SCT SXVF-H9 Starlight-Xpress / R / 120.0	-0.13 ± 2.74
HAT-P-25b (LOW) 2020-11-04	Martin Crow Burnham Observatory	Celestron C9.25 SX694 mono / R / 60.0	3.2 ± 2.16
HAT-P-25b (LOW) 2016-01-24	Anaël Wünsche Observatoire des Baronnies Provençales	Astelco FLIPL230 / Lum / 60.0	0.3 ± 0.72
HAT-P-25b (LOW) 2015-12-12	Anaël Wünsche Observatoire des Baronnies Provençales	CDK Planewave SBIG STL11K / Clear / 240.0	-2.89 ± 1.87
HAT-P-25b (LOW) 2015-11-01	Anaël Wünsche Observatoire des Baronnies Provençales	CDK Planewave SBIG STL11K / Clear / 240.0	4.4 ± 1.87
HAT-P-25b (LOW) 2015-02-11	Anaël Wünsche Observatoire des Baronnies Provençales	Astelco FLIPL230 / V / 60.0	2.82 ± 0.72
HAT-P-25b (LOW) 2015-02-11	Anaël Wünsche Observatoire des Baronnies Provençales	CDK Planewave SBIG STL11K / Clear / 60.0	0.08 ± 0.86
Space Observations
Planet Observation Date	Mission		O-C minutes
HAT-P-25b (LOW) 2021-11-05	TESS		-3.24 ± 1.12
HAT-P-25b (LOW) 2021-11-01	TESS		-2.44 ± 1.05
HAT-P-25b (LOW) 2021-10-28	TESS		1.35 ± 1.08
HAT-P-25b (LOW) 2021-10-21	TESS		0.39 ± 1.11
HAT-P-25b (LOW) 2021-10-17	TESS		1.07 ± 1.27
HAT-P-25b (LOW) 2021-10-14	TESS		-0.11 ± 1.07
HAT-P-25b (LOW) 2021-10-10	TESS		-0.25 ± 1.31
HAT-P-25b (LOW) 2021-10-06	TESS		0.2 ± 1.01
HAT-P-25b (LOW) 2021-10-03	TESS		-1.06 ± 1.24
HAT-P-25b (LOW) 2021-09-26	TESS		-1.24 ± 1.2
HAT-P-25b (LOW) 2021-09-22	TESS		-0.79 ± 1.22
HAT-P-25b (LOW) 2021-09-18	TESS		0.31 ± 1.22
HAT-P-25b (LOW) 2021-09-11	TESS		1.55 ± 1.18
HAT-P-25b (LOW) 2021-09-07	TESS		-0.76 ± 1.14
HAT-P-25b (LOW) 2021-09-04	TESS		-0.75 ± 1.25
HAT-P-25b (LOW) 2021-08-27	TESS		1.81 ± 1.14
HAT-P-25b (LOW) 2021-08-24	TESS		0.58 ± 1.28
Literature Mid-times
Planet Observation Date	Reference		O-C minutes
2017-12-18	Mallonn et al. 2019		-1.81 ± 0.89
2017-12-07	Mallonn et al. 2019		1.31 ± 0.92
2016-11-04	Wang et al. 2018		0.5 ± 0.94
2016-01-28	Wang et al. 2018		1.41 ± 2.56
2016-01-17	Wang et al. 2018		-0.65 ± 1.8
2015-02-04	Wang et al. 2018		-2.89 ± 1.71
2013-11-30	Wang et al. 2018		1.24 ± 0.84
2013-11-19	Wang et al. 2018		0.56 ± 1.53
2013-11-04	Mallonn et al. 2019		0.36 ± 1.4
2013-10-17	Wang et al. 2018		1.58 ± 1.51
2013-09-25	Wang et al. 2018		-1.47 ± 0.95
2010-01-02	Wang et al. 2018		-0.24 ± 0.53
2009-12-11	Quinn et al. 2012		-1.49 ± 0.68
2009-11-01	Wang et al. 2018		-0.17 ± 1.14

HAT-P-25b (LOW)

Discovered by: Quinn et al. 2012

ExoClock Observations

Space Observations

Literature Mid-times