exoclock

WASP-18b (MEDIUM)

Discovered by: Hellier et al. 2009

The Star
Simbad
GAIA
2MASS		 HD 10069
DR2 4955371367334610048
J01372503-4540404
RA 01:37:25.0335 DEC -45:40:40.376
Parallax
8.069 mas		 P.M. RA
25.243 mas/y		 P.M. DEC
20.597 mas/y
MagV
9.3		 MagR*
8.979		 MagI*
8.748		 MagJ
8.409		 MagH
8.231		 MagK
8.131
MagG
9.166		 MagGBP
9.427		 MagGRP
8.788
*Calculated from GAIA magnitudes.

Ephemeris - Verified True
Kokori et al. 2022
Mid-time
2458501.324483 ± 1.9e-05 BJDTDB
Period
0.941452417 ± 1.9e-08 days
Transit Parameters
Shporer et al. 2019
Rp/Rs
0.09716 ± 0.00014		 a/Rs
3.562 +0.022 -0.023
 i
84.9 +0.3 -0.3 deg
e
0.0091 +0.0012 -0.0012
 ω
269.0 +3.0 -3.0 deg
DepthR*
12.09 mmag		 Duration*
2.18 hours
*Calculated from the other parameters, using PyLightcurve.
**Adjusted based on the space observations.

Limb Darkening Parameters
Hellier et al. 2009
Teff
6400.0 +100.0 -100.0 K
 Log(g)
4.4 +0.15 -0.15 cm/s2
 Fe/H
0.0 +0.09 -0.09 dex
ExoClock Status
Observing Priority MEDIUM
Minimum aperture 5.0"
Total Observations (Recent) 111 (2)
O-C -1.14 ± 0.43 minutes
ExoClock Observations (Recent) 9 (2)
Space Observations (Recent) 89 (0)
ETD Observations (Recent) 2 (0)
Literature Mid-times (Recent) 11 (0)
Kepler Rp/Rs -
TESS Rp/Rs 0.097024 ± 6e-05

WASP-18b


ExoClock Observations
Planet
Observation Date		 Observer
Observatory		 Telescope
Camera / Filter / Exp [s]		 O-C
minutes
WASP-18b (MEDIUM)
2023-12-20		Andre Kovacs
Observatório Pico dos Dias (OPD)		0.6 m Boller & Chivens f/6.75
Andor iKon-L 936 CCD / I / 25.0		-1.35 ± 0.81
WASP-18b (MEDIUM)
2023-09-13		Anaël Wünsche
El Sauce Observatory		CDK Planewave Chili
Moravian G4 16k / R / 120.0		0.51 ± 1.12
WASP-18b (MEDIUM)
2022-12-14		Yves Jongen
Deep Sky Chile		Plane Wave CDK 17"
Moravian 4G / R / 12.0		-1.97 ± 1.08
WASP-18b (MEDIUM)
2022-11-28		Yves Jongen
Deep Sky Chile		Plane Wave CDK 17"
Moravian 4G / R / 12.0		0.5 ± 1.37
WASP-18b (MEDIUM)
2022-11-28		Jean-Pascal Vignes
Deep Sky Chile		Planewave CDK400
QHYCCD 600M / Lum / 10.0		-1.85 ± 0.79
WASP-18b (MEDIUM)
2020-11-03		Yves Jongen
Deep Sky Chile		Plane Wave CDK 17"
Moravian 4G / R / 60.0		2.79 ± 0.86
WASP-18b (MEDIUM)
2020-11-01		Yves Jongen
Deep Sky Chile		Plane Wave CDK 17"
Moravian 4G / R / 60.0		0.06 ± 0.86
WASP-18b (MEDIUM)
2020-10-31		Yves Jongen
Deep Sky Chile		Plane Wave CDK 17"
Moravian 4G / R / 60.0		0.71 ± 1.3
WASP-18b (MEDIUM)
2020-07-27		Andre Kovacs
Andre Kovacs		GSO 6" Ritchey-Chretien
DSLR Canon 700D / Lum / 144.0		3.94 ± 3.17

Space Observations
Planet
Observation Date		 Mission O-C
minutes
WASP-18b (MEDIUM)
2020-10-19		TESS0.15 ± 0.24
WASP-18b (MEDIUM)
2020-10-18		TESS-0.02 ± 0.24
WASP-18b (MEDIUM)
2020-10-16		TESS0.04 ± 0.2
WASP-18b (MEDIUM)
2020-10-15		TESS-0.21 ± 0.23
WASP-18b (MEDIUM)
2020-10-14		TESS0.63 ± 0.26
WASP-18b (MEDIUM)
2020-10-13		TESS-0.02 ± 0.27
WASP-18b (MEDIUM)
2020-10-12		TESS0.43 ± 0.27
WASP-18b (MEDIUM)
2020-10-11		TESS-0.5 ± 0.23
WASP-18b (MEDIUM)
2020-10-10		TESS-0.24 ± 0.23
WASP-18b (MEDIUM)
2020-10-09		TESS-0.18 ± 0.23
WASP-18b (MEDIUM)
2020-10-08		TESS0.0 ± 0.23
WASP-18b (MEDIUM)
2020-10-03		TESS0.18 ± 0.23
WASP-18b (MEDIUM)
2020-10-03		TESS0.12 ± 0.23
WASP-18b (MEDIUM)
2020-10-02		TESS0.1 ± 0.22
WASP-18b (MEDIUM)
2020-10-01		TESS-0.53 ± 0.23
WASP-18b (MEDIUM)
2020-09-30		TESS0.15 ± 0.23
WASP-18b (MEDIUM)
2020-09-29		TESS-0.08 ± 0.24
WASP-18b (MEDIUM)
2020-09-28		TESS0.3 ± 0.22
WASP-18b (MEDIUM)
2020-09-27		TESS0.1 ± 0.24
WASP-18b (MEDIUM)
2020-09-26		TESS0.17 ± 0.23
WASP-18b (MEDIUM)
2020-09-25		TESS0.06 ± 0.23
WASP-18b (MEDIUM)
2020-09-24		TESS-0.02 ± 0.22
WASP-18b (MEDIUM)
2020-09-23		TESS-0.09 ± 0.24
WASP-18b (MEDIUM)
2020-09-18		TESS-0.29 ± 0.26
WASP-18b (MEDIUM)
2020-09-17		TESS-0.25 ± 0.24
WASP-18b (MEDIUM)
2020-09-16		TESS-0.4 ± 0.22
WASP-18b (MEDIUM)
2020-09-16		TESS-0.29 ± 0.24
WASP-18b (MEDIUM)
2020-09-15		TESS0.19 ± 0.27
WASP-18b (MEDIUM)
2020-09-14		TESS0.15 ± 0.27
WASP-18b (MEDIUM)
2020-09-13		TESS-0.01 ± 0.24
WASP-18b (MEDIUM)
2020-09-12		TESS0.07 ± 0.23
WASP-18b (MEDIUM)
2020-09-11		TESS0.96 ± 0.26
WASP-18b (MEDIUM)
2020-09-10		TESS0.41 ± 0.27
WASP-18b (MEDIUM)
2020-09-05		TESS-0.01 ± 0.23
WASP-18b (MEDIUM)
2020-09-04		TESS-0.26 ± 0.26
WASP-18b (MEDIUM)
2020-09-03		TESS-0.2 ± 0.26
WASP-18b (MEDIUM)
2020-09-02		TESS0.18 ± 0.22
WASP-18b (MEDIUM)
2020-09-01		TESS-0.25 ± 0.24
WASP-18b (MEDIUM)
2020-08-31		TESS-0.06 ± 0.26
WASP-18b (MEDIUM)
2020-08-31		TESS-0.16 ± 0.23
WASP-18b (MEDIUM)
2020-08-30		TESS0.35 ± 0.24
WASP-18b (MEDIUM)
2020-08-29		TESS0.18 ± 0.2
WASP-18b (MEDIUM)
2020-08-27		TESS-0.33 ± 0.23
WASP-18b (MEDIUM)
2018-10-13		TESS-0.46 ± 0.24
WASP-18b (MEDIUM)
2018-10-12		TESS-0.08 ± 0.24
WASP-18b (MEDIUM)
2018-10-11		TESS0.01 ± 0.22
WASP-18b (MEDIUM)
2018-10-10		TESS0.07 ± 0.23
WASP-18b (MEDIUM)
2018-10-10		TESS0.34 ± 0.23
WASP-18b (MEDIUM)
2018-10-09		TESS-0.4 ± 0.23
WASP-18b (MEDIUM)
2018-10-08		TESS-0.25 ± 0.23
WASP-18b (MEDIUM)
2018-10-07		TESS0.33 ± 0.23
WASP-18b (MEDIUM)
2018-10-06		TESS-0.47 ± 0.2
WASP-18b (MEDIUM)
2018-10-05		TESS-0.28 ± 0.22
WASP-18b (MEDIUM)
2018-10-02		TESS0.08 ± 0.23
WASP-18b (MEDIUM)
2018-10-01		TESS-0.12 ± 0.2
WASP-18b (MEDIUM)
2018-09-30		TESS0.13 ± 0.22
WASP-18b (MEDIUM)
2018-09-29		TESS-0.09 ± 0.22
WASP-18b (MEDIUM)
2018-09-28		TESS0.36 ± 0.22
WASP-18b (MEDIUM)
2018-09-27		TESS0.15 ± 0.22
WASP-18b (MEDIUM)
2018-09-26		TESS0.07 ± 0.22
WASP-18b (MEDIUM)
2018-09-25		TESS-0.04 ± 0.24
WASP-18b (MEDIUM)
2018-09-24		TESS0.06 ± 0.2
WASP-18b (MEDIUM)
2018-09-19		TESS0.27 ± 0.23
WASP-18b (MEDIUM)
2018-09-18		TESS0.07 ± 0.22
WASP-18b (MEDIUM)
2018-09-17		TESS0.19 ± 0.22
WASP-18b (MEDIUM)
2018-09-16		TESS0.09 ± 0.23
WASP-18b (MEDIUM)
2018-09-15		TESS0.11 ± 0.2
WASP-18b (MEDIUM)
2018-09-14		TESS-0.2 ± 0.23
WASP-18b (MEDIUM)
2018-09-13		TESS0.09 ± 0.23
WASP-18b (MEDIUM)
2018-09-12		TESS-0.23 ± 0.19
WASP-18b (MEDIUM)
2018-09-11		TESS0.48 ± 0.22
WASP-18b (MEDIUM)
2018-09-10		TESS-0.1 ± 0.24
WASP-18b (MEDIUM)
2018-09-09		TESS0.04 ± 0.2
WASP-18b (MEDIUM)
2018-09-08		TESS0.11 ± 0.23
WASP-18b (MEDIUM)
2018-09-08		TESS-0.02 ± 0.23
WASP-18b (MEDIUM)
2018-09-05		TESS0.36 ± 0.24
WASP-18b (MEDIUM)
2018-09-04		TESS-0.18 ± 0.22
WASP-18b (MEDIUM)
2018-09-03		TESS-0.22 ± 0.24
WASP-18b (MEDIUM)
2018-09-02		TESS0.17 ± 0.22
WASP-18b (MEDIUM)
2018-09-01		TESS0.23 ± 0.23
WASP-18b (MEDIUM)
2018-08-31		TESS0.14 ± 0.23
WASP-18b (MEDIUM)
2018-08-30		TESS0.01 ± 0.26
WASP-18b (MEDIUM)
2018-08-29		TESS-0.02 ± 0.23
WASP-18b (MEDIUM)
2018-08-28		TESS0.03 ± 0.23
WASP-18b (MEDIUM)
2018-08-27		TESS-0.41 ± 0.23
WASP-18b (MEDIUM)
2018-08-26		TESS-0.13 ± 0.22
WASP-18b (MEDIUM)
2018-08-25		TESS-0.1 ± 0.22
WASP-18b (MEDIUM)
2018-08-24		TESS-0.33 ± 0.22
WASP-18b (MEDIUM)
2018-08-23		TESS-0.21 ± 0.22

ETD Observations
Planet
Observation Date		 Observer(s) ETD link O-C
minutes
WASP-18b (MEDIUM)
2011-10-17		Ivan Curtis13189030023.34 ± 2.16
WASP-18b (MEDIUM)
2009-09-29		Fernando Tifner1262449833-1.02 ± 1.58

Literature Mid-times
Planet
Observation Date		 Reference O-C
minutes
2015-10-24 Wilkins et al. 2017 -1.01 ± 0.56
2015-08-21 Wilkins et al. 2017 0.38 ± 0.43
2014-08-26 Wilkins et al. 2017 -0.45 ± 1.15
2011-11-11 Maxted et al. 2013 1.09 ± 1.87
2011-01-09 Maxted et al. 2013 1.28 ± 0.69
2010-12-24 Maxted et al. 2013 0.26 ± 0.72
2010-10-04 Maxted et al. 2013 1.28 ± 1.3
2010-10-01 Maxted et al. 2013 -0.94 ± 0.58
2010-08-23 Maxted et al. 2013 0.14 ± 0.14
2010-01-24 Maxted et al. 2013 -0.09 ± 0.14
2007-04-30 Hellier et al. 2009 -0.24 ± 0.55
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