exoclock

HATS-18b (MEDIUM)

Discovered by: Penev et al. 2016

The Star
Simbad
GAIA
2MASS		 HATS-18
DR2 3483636295772522880
J11354977-2909216
RA 11:35:49.7771 DEC -29:09:21.755
Parallax
1.574 mas		 P.M. RA
3.179 mas/y		 P.M. DEC
-4.904 mas/y
MagV
14.067		 MagR*
13.641		 MagI*
13.257		 MagJ
12.736		 MagH
12.382		 MagK
12.289
MagG
13.879		 MagGBP
14.273		 MagGRP
13.336
*Calculated from GAIA magnitudes.

Ephemeris - Verified True
Kokori et al. 2025
Mid-time
2458602.213805 ± 6.4e-05 BJDTDB
Period
0.837843826 ± 7.4e-08 days
Transit Parameters
Patel et al. 2022
Rp/Rs
0.1456 ± 0.0021		 a/Rs
3.78 +0.09 -0.14
 i
87.0 +85.0 80.0 deg
e
-		 ω
- deg
DepthR*
28.41 mmag		 Duration*
1.94 hours
*Calculated from the other parameters, using PyLightcurve.
**Adjusted based on the space observations.

Limb Darkening Parameters
Penev et al. 2016
Teff
5600.0 +120.0 -120.0 K
 Log(g)
4.44 +0.03 -0.03 cm/s2
 Fe/H
0.28 +0.08 -0.08 dex
ExoClock Status
Observing Priority MEDIUM
Minimum aperture 9.94"
Total Observations (Recent) 137 (2)
O-C 0.4 ± 0.42 minutes
ExoClock Observations (Recent) 32 (2)
Space Observations (Recent) 74 (0)
ETD Observations (Recent) 0 (0)
Literature Mid-times (Recent) 31 (0)
Kepler Rp/Rs -
TESS Rp/Rs 0.13354 ± 0.00076

HATS-18b


ExoClock Observations
Planet
Observation Date		 Observer
Observatory		 Telescope
Camera / Filter / Exp [s]		 O-C
minutes
HATS-18b (MEDIUM)
2025-07-07		Jean-Charles Ripault
HRT Observatory		Astrosib RC360
Moravian C3-61000 / R / 300.0		-0.85 ± 2.74
HATS-18b (MEDIUM)
2025-04-18		David Patterson
Numurkah Observatory		Celestron CPC800
ZWOASI294MC / Lum / 180.0		0.25 ± 4.46
HATS-18b (MEDIUM)
2024-06-30		Yves Jongen
Deep Sky Chile		Plane Wave CDK 17"
Moravian 4G / Lum / 120.0		-0.02 ± 0.75
HATS-18b (MEDIUM)
2024-05-09		Anaël Wünsche
El Sauce Observatory		CDK Planewave Chili
Moravian G4 16k / Lum / 120.0		2.14 ± 2.45
HATS-18b (MEDIUM)
2024-05-04		Nicolás Castro-Morales
El Sauce		Mas500
Moravian / rpr / 60.0		4.24 ± 2.3
HATS-18b (MEDIUM)
2024-05-04		Nicolás Castro-Morales
El Sauce		Mas500
Moravian / Clear / 60.0		3.9 ± 1.41
HATS-18b (MEDIUM)
2024-04-03		Yves Jongen
Deep Sky Chile		Plane Wave CDK 17"
Moravian 4G / Lum / 180.0		-2.51 ± 1.31
HATS-18b (MEDIUM)
2024-03-07		Yves Jongen
Deep Sky Chile		Plane Wave CDK 17"
Moravian 4G / Lum / 180.0		0.32 ± 0.68
HATS-18b (MEDIUM)
2023-05-03		Yves Jongen
Deep Sky Chile		Plane Wave CDK 17"
Moravian 4G / Lum / 120.0		0.6 ± 1.09
HATS-18b (MEDIUM)
2023-04-28		Jean-Pascal Vignes
Deep Sky Chile		Planewave CDK400
QHYCCD 600M / Lum / 120.0		3.21 ± 0.85
HATS-18b (MEDIUM)
2023-04-11		Yves Jongen
Deep Sky Chile		Plane Wave CDK 17"
Moravian 4G / Lum / 120.0		0.95 ± 0.95
HATS-18b (MEDIUM)
2023-03-28		Yves Jongen
Deep Sky Chile		Plane Wave CDK 17"
Moravian 4G / Lum / 180.0		0.37 ± 0.95
HATS-18b (MEDIUM)
2023-02-24		Jean-Pascal Vignes
Deep Sky Chile		Planewave CDK400
QHYCCD 600M / Lum / 90.0		-0.14 ± 1.43
HATS-18b (MEDIUM)
2023-02-13		Yves Jongen
Deep Sky Chile		Plane Wave CDK 17"
Moravian 4G / Lum / 120.0		1.89 ± 0.94
HATS-18b (MEDIUM)
2023-01-24		Yves Jongen
Deep Sky Chile		Plane Wave CDK 17"
Moravian 4G / Lum / 120.0		-1.79 ± 0.72
HATS-18b (MEDIUM)
2023-01-19		Yves Jongen
Deep Sky Chile		Plane Wave CDK 17"
Moravian 4G / Lum / 120.0		0.52 ± 0.76
HATS-18b (MEDIUM)
2023-01-19		Anaël Wünsche
El Sauce Observatory		CDK Planewave Chili
Moravian G4 16k / Lum / 120.0		-0.09 ± 1.02
HATS-18b (MEDIUM)
2023-01-08		Yves Jongen
Deep Sky Chile		Plane Wave CDK 17"
Moravian 4G / Lum / 120.0		-0.88 ± 0.82
HATS-18b (MEDIUM)
2022-12-29		Yves Jongen
Deep Sky Chile		Plane Wave CDK 17"
Moravian 4G / Lum / 120.0		0.81 ± 0.84
HATS-18b (MEDIUM)
2020-12-20		Yves Jongen
Deep Sky Chile		Plane Wave CDK 17"
Moravian 4G / Lum / 120.0		1.38 ± 0.75
HATS-18b (MEDIUM)
2020-07-04		Yves Jongen
Deep Sky Chile		Plane Wave CDK 17"
Moravian 4G / Lum / 120.0		1.57 ± 1.01
HATS-18b (MEDIUM)
2020-06-23		Leandro de Almeida
Observatório do Pico dos Dias		0.6m Boller & Chivens f/13.49
Andor Ikon 14912 CCD / I / 60.0		1.39 ± 0.78
HATS-18b (MEDIUM)
2020-05-29		Leandro de Almeida
Observatório do Pico dos Dias		0.6m Boller & Chivens f/13.49
Andor Ixon 4335 CCD / I / 60.0		-3.71 ± 0.91
HATS-18b (MEDIUM)
2020-05-13		Yves Jongen
Deep Sky Chile		Plane Wave CDK 17"
Moravian 4G / Lum / 120.0		-2.26 ± 0.81
HATS-18b (MEDIUM)
2020-05-03		Yves Jongen
Deep Sky Chile		Plane Wave CDK 17"
Moravian 4G / Lum / 120.0		1.06 ± 0.53
HATS-18b (MEDIUM)
2020-04-28		Leandro de Almeida
Observatório do Pico dos Dias		0.6m Boller & Chivens f/13.49
Andor Ixon 4335 CCD / I / 60.0		1.05 ± 0.69
HATS-18b (MEDIUM)
2020-04-11		Yves Jongen
Deep Sky Chile		Plane Wave CDK 17"
Moravian 4G / Lum / 120.0		-1.61 ± 0.95
HATS-18b (MEDIUM)
2020-02-24		Yves Jongen
Deep Sky Chile		Plane Wave CDK 17"
Moravian 4G / Lum / 120.0		0.54 ± 0.68
HATS-18b (MEDIUM)
2020-02-19		Yves Jongen
Deep Sky Chile		Plane Wave CDK 17"
Moravian 4G / Lum / 120.0		0.45 ± 0.53
HATS-18b (MEDIUM)
2020-02-04		Yves Jongen
Deep Sky Chile		Plane Wave CDK 17"
Moravian 4G / Lum / 120.0		1.57 ± 0.59
HATS-18b (MEDIUM)
2020-01-14		Yves Jongen
Deep Sky Chile		Plane Wave CDK 17"
Moravian 4G / Lum / 120.0		1.46 ± 0.91
HATS-18b (MEDIUM)
2018-05-21		Leandro de Almeida
Observatório do Pico dos Dias		1.6m Perkin-Elmer f/10
Andor Ikon 9867 CCD / V / 60.0		-1.87 ± 0.35

Space Observations
Planet
Observation Date		 Mission O-C
minutes
HATS-18b (MEDIUM)
2023-04-04		TESS3.65 ± 1.44
HATS-18b (MEDIUM)
2023-04-03		TESS3.86 ± 3.02
HATS-18b (MEDIUM)
2023-04-02		TESS0.75 ± 1.58
HATS-18b (MEDIUM)
2023-04-02		TESS1.1 ± 1.58
HATS-18b (MEDIUM)
2023-04-01		TESS-3.01 ± 1.73
HATS-18b (MEDIUM)
2023-03-31		TESS-2.37 ± 2.88
HATS-18b (MEDIUM)
2023-03-29		TESS-0.23 ± 1.58
HATS-18b (MEDIUM)
2023-03-28		TESS-2.62 ± 2.16
HATS-18b (MEDIUM)
2023-03-28		TESS2.2 ± 2.02
HATS-18b (MEDIUM)
2023-03-27		TESS-0.9 ± 1.35
HATS-18b (MEDIUM)
2023-03-26		TESS0.17 ± 2.02
HATS-18b (MEDIUM)
2023-03-25		TESS-1.79 ± 1.73
HATS-18b (MEDIUM)
2023-03-24		TESS2.6 ± 2.3
HATS-18b (MEDIUM)
2023-03-23		TESS-2.03 ± 1.87
HATS-18b (MEDIUM)
2023-03-22		TESS1.92 ± 2.16
HATS-18b (MEDIUM)
2023-03-21		TESS3.42 ± 2.3
HATS-18b (MEDIUM)
2023-03-20		TESS-3.86 ± 1.44
HATS-18b (MEDIUM)
2023-03-19		TESS-1.63 ± 1.73
HATS-18b (MEDIUM)
2023-03-18		TESS1.45 ± 2.3
HATS-18b (MEDIUM)
2023-03-18		TESS2.09 ± 1.87
HATS-18b (MEDIUM)
2023-03-17		TESS3.45 ± 2.59
HATS-18b (MEDIUM)
2023-03-16		TESS0.06 ± 1.87
HATS-18b (MEDIUM)
2023-03-15		TESS-2.18 ± 1.73
HATS-18b (MEDIUM)
2023-03-14		TESS-0.25 ± 2.3
HATS-18b (MEDIUM)
2023-03-13		TESS-1.34 ± 1.58
HATS-18b (MEDIUM)
2023-03-12		TESS0.31 ± 1.87
HATS-18b (MEDIUM)
2023-03-12		TESS-2.22 ± 2.16
HATS-18b (MEDIUM)
2021-03-31		TESS-0.25 ± 1.87
HATS-18b (MEDIUM)
2021-03-30		TESS-0.23 ± 1.43
HATS-18b (MEDIUM)
2021-03-29		TESS-0.7 ± 1.73
HATS-18b (MEDIUM)
2021-03-29		TESS0.51 ± 1.58
HATS-18b (MEDIUM)
2021-03-28		TESS1.73 ± 2.02
HATS-18b (MEDIUM)
2021-03-27		TESS-1.23 ± 1.73
HATS-18b (MEDIUM)
2021-03-26		TESS-0.16 ± 1.58
HATS-18b (MEDIUM)
2021-03-25		TESS-1.68 ± 1.58
HATS-18b (MEDIUM)
2021-03-24		TESS0.25 ± 1.58
HATS-18b (MEDIUM)
2021-03-24		TESS2.48 ± 2.02
HATS-18b (MEDIUM)
2021-03-23		TESS-1.49 ± 2.02
HATS-18b (MEDIUM)
2021-03-22		TESS1.74 ± 1.44
HATS-18b (MEDIUM)
2021-03-19		TESS-0.31 ± 1.87
HATS-18b (MEDIUM)
2021-03-18		TESS0.9 ± 1.58
HATS-18b (MEDIUM)
2021-03-17		TESS-2.35 ± 1.87
HATS-18b (MEDIUM)
2021-03-16		TESS-0.56 ± 1.73
HATS-18b (MEDIUM)
2021-03-15		TESS1.09 ± 1.58
HATS-18b (MEDIUM)
2021-03-14		TESS-1.44 ± 1.87
HATS-18b (MEDIUM)
2021-03-14		TESS-0.51 ± 1.58
HATS-18b (MEDIUM)
2021-03-13		TESS-0.02 ± 1.44
HATS-18b (MEDIUM)
2021-03-12		TESS-3.87 ± 1.35
HATS-18b (MEDIUM)
2021-03-11		TESS-2.05 ± 2.02
HATS-18b (MEDIUM)
2021-03-10		TESS3.63 ± 1.73
HATS-18b (MEDIUM)
2021-03-09		TESS-0.48 ± 1.58
HATS-18b (MEDIUM)
2021-03-09		TESS-3.73 ± 2.3
HATS-18b (MEDIUM)
2019-04-22		TESS-1.95 ± 2.45
HATS-18b (MEDIUM)
2019-04-21		TESS-2.9 ± 1.87
HATS-18b (MEDIUM)
2019-04-20		TESS-0.96 ± 1.73
HATS-18b (MEDIUM)
2019-04-19		TESS1.26 ± 1.87
HATS-18b (MEDIUM)
2019-04-18		TESS-1.55 ± 2.16
HATS-18b (MEDIUM)
2019-04-17		TESS-0.34 ± 2.02
HATS-18b (MEDIUM)
2019-04-16		TESS3.32 ± 2.02
HATS-18b (MEDIUM)
2019-04-16		TESS0.94 ± 2.16
HATS-18b (MEDIUM)
2019-04-15		TESS-0.87 ± 1.58
HATS-18b (MEDIUM)
2019-04-14		TESS-0.81 ± 2.45
HATS-18b (MEDIUM)
2019-04-13		TESS1.13 ± 2.02
HATS-18b (MEDIUM)
2019-04-12		TESS1.34 ± 2.88
HATS-18b (MEDIUM)
2019-04-07		TESS4.16 ± 2.02
HATS-18b (MEDIUM)
2019-04-06		TESS2.21 ± 1.73
HATS-18b (MEDIUM)
2019-04-05		TESS2.19 ± 2.3
HATS-18b (MEDIUM)
2019-04-04		TESS-0.05 ± 2.88
HATS-18b (MEDIUM)
2019-04-03		TESS-0.42 ± 1.44
HATS-18b (MEDIUM)
2019-04-02		TESS-0.21 ± 1.73
HATS-18b (MEDIUM)
2019-04-01		TESS3.88 ± 2.02
HATS-18b (MEDIUM)
2019-04-01		TESS0.78 ± 3.17
HATS-18b (MEDIUM)
2019-03-31		TESS-0.6 ± 2.02
HATS-18b (MEDIUM)
2019-03-30		TESS2.92 ± 2.16

Literature Mid-times
Planet
Observation Date		 Reference O-C
minutes
2021-06-15 Southworth et al. 2022 -0.69 ± 0.84
2021-06-10 Southworth et al. 2022 0.55 ± 0.6
2021-06-05 Southworth et al. 2022 -0.85 ± 0.58
2021-05-25 Southworth et al. 2022 0.12 ± 0.3
2021-05-15 Southworth et al. 2022 -0.28 ± 0.29
2020-12-20 Southworth et al. 2022 1.45 ± 1.14
2020-07-04 Southworth et al. 2022 1.43 ± 0.99
2020-05-13 Southworth et al. 2022 -1.95 ± 1.12
2020-05-03 Southworth et al. 2022 1.22 ± 0.66
2020-04-11 Southworth et al. 2022 -1.51 ± 1.27
2020-02-24 Southworth et al. 2022 -0.65 ± 0.78
2020-02-19 Southworth et al. 2022 0.17 ± 0.52
2020-02-04 Southworth et al. 2022 0.6 ± 0.69
2020-01-14 Southworth et al. 2022 1.61 ± 0.98
2019-06-02 Southworth et al. 2022 0.57 ± 0.29
2019-05-23 Southworth et al. 2022 -0.37 ± 0.65
2019-05-17 Southworth et al. 2022 -0.6 ± 0.3
2018-06-21 Southworth et al. 2022 -0.43 ± 0.35
2018-05-26 Southworth et al. 2022 1.0 ± 0.98
2018-05-21 Southworth et al. 2022 -1.18 ± 0.39
2018-05-05 Southworth et al. 2022 -0.57 ± 0.26
2018-04-30 Southworth et al. 2022 -0.18 ± 0.39
2018-04-25 Southworth et al. 2022 0.49 ± 0.3
2018-04-09 Patra et al. 2020 0.3 ± 0.42
2017-07-10 Southworth et al. 2022 0.26 ± 0.26
2017-06-19 Southworth et al. 2022 -0.47 ± 0.24
2017-06-14 Southworth et al. 2022 0.13 ± 0.91
2017-05-29 Southworth et al. 2022 0.33 ± 0.27
2017-03-22 Patra et al. 2020 -0.66 ± 0.58
2016-01-23 Southworth et al. 2022 0.31 ± 0.43
2015-03-08 Penev et al. 2016 1.53 ± 0.37
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