exoclock

WASP-4b (LOW)

Discovered by: Wilson et al. 2008

The Star
Simbad
GAIA
2MASS		 WASP-4
DR2 6535499658122055552
J23341508-4203411
RA 23:34:15.0858 DEC -42:03:41.049
Parallax
3.715 mas		 P.M. RA
9.874 mas/y		 P.M. DEC
-87.518 mas/y
MagV
12.48		 MagR
11.9		 MagI*
11.672		 MagJ
11.179		 MagH
10.842		 MagK
10.746
MagG
12.316		 MagGBP
12.71		 MagGRP
11.775
*Calculated from GAIA magnitudes.

Ephemeris - Verified True
Kokori et al. 2022
Mid-time
2456139.07356 ± 2.4e-05 BJDTDB
Period
1.338231388 ± 2.2e-08 days
Transit Parameters
Bouma et al. 2019
Rp/Rs
0.152 ± 0.0004		 a/Rs
5.451 +0.023 -0.052
 i
89.1 +0.7 -0.8 deg
e
-		 ω
- deg
DepthR*
31.37 mmag		 Duration*
2.17 hours
*Calculated from the other parameters, using PyLightcurve.
**Adjusted based on the space observations.

Limb Darkening Parameters
Wilson et al. 2008
Teff
5500.0 +150.0 -150.0 K
 Log(g)
4.3 +0.2 -0.2 cm/s2
 Fe/H
0.0 +0.2 -0.2 dex
ExoClock Status
Observing Priority LOW
Minimum aperture 5.54"
Total Observations (Recent) 125 (3)
O-C -0.46 ± 0.19 minutes
ExoClock Observations (Recent) 32 (3)
Space Observations (Recent) 47 (0)
ETD Observations (Recent) 0 (0)
Literature Mid-times (Recent) 46 (0)
Kepler Rp/Rs -
TESS Rp/Rs 0.15147 ± 0.00026

WASP-4b


ExoClock Observations
Planet
Observation Date		 Observer
Observatory		 Telescope
Camera / Filter / Exp [s]		 O-C
minutes
WASP-4b (LOW)
2024-12-03		Yves Jongen
Deep Sky Chile		Plane Wave CDK 17"
Moravian 4G / Lum / 100.0		-1.2 ± 0.42
WASP-4b (LOW)
2024-09-15		Joaquin Ruiz Luque
Asociación Argentina "Amigos de la Astronomía"		Sky-Watcher
Starlight Xpress Trius SX-814 / V / 30.0		2.51 ± 2.16
WASP-4b (LOW)
2024-07-14		Nicolas Castro-Morales
El Sauce		Mas500
Moravian / rpr / 90.0		0.58 ± 1.04
WASP-4b (LOW)
2023-09-17		Jean-Pascal Vignes
Deep Sky Chile		PlaneWave CDK 17"
QHYCCD 600 M / R / 60.0		1.1 ± 0.72
WASP-4b (LOW)
2023-08-29		Yves Jongen
Deep Sky Chile		Plane Wave CDK 17"
Moravian 4G / Lum / 180.0		-0.87 ± 0.52
WASP-4b (LOW)
2023-08-13		Jean-Pascal Vignes
Deep Sky Chile		PlaneWave CDK 17"
QHYCCD 600 M / V / 60.0		0.7 ± 0.78
WASP-4b (LOW)
2023-05-18		Yves Jongen
Deep Sky Chile		Plane Wave CDK 17"
Moravian 4G / Lum / 90.0		-0.0 ± 0.46
WASP-4b (LOW)
2022-12-18		Yves Jongen
Deep Sky Chile		Plane Wave CDK 17"
Moravian 4G / Lum / 180.0		-3.04 ± 0.72
WASP-4b (LOW)
2022-12-06		Yves Jongen
Deep Sky Chile		Plane Wave CDK 17"
Moravian 4G / Lum / 120.0		-0.12 ± 0.42
WASP-4b (LOW)
2022-12-02		Yves Jongen
Deep Sky Chile		Plane Wave CDK 17"
Moravian 4G / Lum / 120.0		-1.69 ± 0.73
WASP-4b (LOW)
2022-09-30		Yves Jongen
Deep Sky Chile		Plane Wave CDK 17"
Moravian 4G / Lum / 180.0		-1.38 ± 1.73
WASP-4b (LOW)
2022-09-26		Yves Jongen
Deep Sky Chile		Plane Wave CDK 17"
Moravian 4G / Lum / 180.0		0.75 ± 0.65
WASP-4b (LOW)
2022-09-10		Yves Jongen
Deep Sky Chile		Plane Wave CDK 17"
Moravian 4G / Lum / 180.0		-2.0 ± 1.3
WASP-4b (LOW)
2022-08-14		Yves Jongen
Deep Sky Chile		Plane Wave CDK 17"
Moravian 4G / Lum / 180.0		-0.81 ± 0.86
WASP-4b (LOW)
2021-12-07		Yves Jongen
Deep Sky Chile		Plane Wave CDK 17"
Moravian 4G / Lum / 120.0		-0.42 ± 0.43
WASP-4b (LOW)
2021-10-05		Yves Jongen
Deep Sky Chile		Plane Wave CDK 17"
Moravian 4G / Lum / 120.0		-0.75 ± 0.43
WASP-4b (LOW)
2021-10-01		Yves Jongen
Deep Sky Chile		Plane Wave CDK 17"
Moravian 4G / Lum / 120.0		-0.03 ± 0.43
WASP-4b (LOW)
2021-09-27		Yves Jongen
Deep Sky Chile		Plane Wave CDK 17"
Moravian 4G / R / 120.0		-0.62 ± 0.58
WASP-4b (LOW)
2021-09-23		Yves Jongen
Deep Sky Chile		Plane Wave CDK 17"
Moravian 4G / R / 120.0		-0.92 ± 0.72
WASP-4b (LOW)
2021-09-03		Yves Jongen
Deep Sky Chile		Plane Wave CDK 17"
Moravian 4G / R / 120.0		1.35 ± 0.86
WASP-4b (LOW)
2021-08-27		Anaël Wünsche
El Sauce Observatory		CDK Planewave Chili
Moravian G4 16k / Lum / 120.0		-0.16 ± 0.58
WASP-4b (LOW)
2021-08-11		Yves Jongen
Deep Sky Chile		Plane Wave CDK 17"
Moravian 4G / R / 120.0		0.96 ± 0.58
WASP-4b (LOW)
2021-08-03		Yves Jongen
Deep Sky Chile		Plane Wave CDK 17"
Moravian 4G / R / 120.0		-0.49 ± 0.58
WASP-4b (LOW)
2020-12-20		Yves Jongen
Deep Sky Chile		Plane Wave CDK 17"
Moravian 4G / R / 120.0		-0.34 ± 0.86
WASP-4b (LOW)
2020-12-08		Yves Jongen
Deep Sky Chile		Plane Wave CDK 17"
Moravian 4G / R / 120.0		-1.52 ± 0.58
WASP-4b (LOW)
2020-10-02		Yves Jongen
Deep Sky Chile		Plane Wave CDK 17"
Moravian 4G / R / 120.0		-0.27 ± 0.58
WASP-4b (LOW)
2020-09-16		Yves Jongen
Deep Sky Chile		Plane Wave CDK 17"
Moravian 4G / R / 120.0		-0.16 ± 0.86
WASP-4b (LOW)
2020-09-12		Yves Jongen
Deep Sky Chile		Plane Wave CDK 17"
Moravian 4G / R / 120.0		2.43 ± 0.58
WASP-4b (LOW)
2020-08-16		Phil Evans
El Sauce		Planewave CDK14
SBIG STT 1603-3 / R / 90.0		0.31 ± 0.58
WASP-4b (LOW)
2020-08-16		Yves Jongen
Deep Sky Chile		Plane Wave CDK 17"
Moravian 4G / R / 120.0		-0.99 ± 0.58
WASP-4b (LOW)
2020-06-06		Yves Jongen
Deep Sky Chile		Plane Wave CDK 17"
Moravian 4G / V / 120.0		-0.04 ± 0.72
WASP-4b (LOW)
2019-12-10		Yves Jongen
Deep Sky Chile		Plane Wave CDK 17"
Moravian 4G / V / 120.0		1.56 ± 0.43

Space Observations
Planet
Observation Date		 Mission O-C
minutes
WASP-4b (LOW)
2020-09-18		TESS-0.9 ± 0.52
WASP-4b (LOW)
2020-09-17		TESS-0.78 ± 0.5
WASP-4b (LOW)
2020-09-16		TESS-0.16 ± 0.52
WASP-4b (LOW)
2020-09-14		TESS0.09 ± 0.45
WASP-4b (LOW)
2020-09-13		TESS-0.15 ± 0.45
WASP-4b (LOW)
2020-09-12		TESS-0.77 ± 0.48
WASP-4b (LOW)
2020-09-10		TESS-1.32 ± 0.53
WASP-4b (LOW)
2020-09-05		TESS-0.06 ± 0.49
WASP-4b (LOW)
2020-09-04		TESS0.15 ± 0.55
WASP-4b (LOW)
2020-09-02		TESS-0.07 ± 0.52
WASP-4b (LOW)
2020-09-01		TESS-1.04 ± 0.52
WASP-4b (LOW)
2020-08-31		TESS-0.51 ± 0.49
WASP-4b (LOW)
2020-08-29		TESS-0.46 ± 0.49
WASP-4b (LOW)
2020-08-28		TESS-0.03 ± 0.49
WASP-4b (LOW)
2020-08-27		TESS-1.05 ± 0.46
WASP-4b (LOW)
2020-08-23		TESS-0.68 ± 0.6
WASP-4b (LOW)
2020-08-21		TESS-1.59 ± 0.62
WASP-4b (LOW)
2020-08-20		TESS0.36 ± 0.65
WASP-4b (LOW)
2020-08-19		TESS0.45 ± 0.58
WASP-4b (LOW)
2020-08-17		TESS0.17 ± 0.52
WASP-4b (LOW)
2020-08-16		TESS-0.5 ± 0.56
WASP-4b (LOW)
2020-08-14		TESS-1.18 ± 0.66
WASP-4b (LOW)
2020-08-09		TESS-0.94 ± 0.66
WASP-4b (LOW)
2020-08-08		TESS0.07 ± 0.63
WASP-4b (LOW)
2020-08-06		TESS-0.3 ± 0.62
WASP-4b (LOW)
2020-08-05		TESS0.39 ± 0.56
WASP-4b (LOW)
2020-08-04		TESS-0.27 ± 0.6
WASP-4b (LOW)
2020-08-02		TESS0.15 ± 0.59
WASP-4b (LOW)
2020-08-01		TESS-0.72 ± 0.59
WASP-4b (LOW)
2018-09-19		TESS-0.38 ± 0.55
WASP-4b (LOW)
2018-09-17		TESS0.3 ± 0.49
WASP-4b (LOW)
2018-09-16		TESS-0.54 ± 0.52
WASP-4b (LOW)
2018-09-15		TESS-0.22 ± 0.49
WASP-4b (LOW)
2018-09-13		TESS-0.47 ± 0.46
WASP-4b (LOW)
2018-09-12		TESS-0.27 ± 0.52
WASP-4b (LOW)
2018-09-11		TESS-0.8 ± 0.56
WASP-4b (LOW)
2018-09-09		TESS-0.76 ± 0.48
WASP-4b (LOW)
2018-09-08		TESS-0.24 ± 0.5
WASP-4b (LOW)
2018-09-04		TESS0.06 ± 0.55
WASP-4b (LOW)
2018-09-03		TESS-0.79 ± 0.52
WASP-4b (LOW)
2018-09-01		TESS0.06 ± 0.48
WASP-4b (LOW)
2018-08-31		TESS-0.66 ± 0.42
WASP-4b (LOW)
2018-08-30		TESS-0.93 ± 0.53
WASP-4b (LOW)
2018-08-28		TESS0.14 ± 0.48
WASP-4b (LOW)
2018-08-27		TESS-0.41 ± 0.45
WASP-4b (LOW)
2018-08-26		TESS-0.82 ± 0.55
WASP-4b (LOW)
2018-08-24		TESS0.38 ± 0.48

Literature Mid-times
Planet
Observation Date		 Reference O-C
minutes
2019-06-19 Southworth et al. 2019 -0.34 ± 0.29
2018-08-27 Southworth et al. 2019 0.04 ± 0.12
2018-08-19 Southworth et al. 2019 -0.45 ± 0.14
2018-08-15 Southworth et al. 2019 -0.1 ± 0.17
2017-08-28 Southworth et al. 2019 0.07 ± 0.2
2017-08-08 Southworth et al. 2019 0.34 ± 0.26
2016-10-17 Southworth et al. 2019 0.28 ± 0.26
2016-10-13 Southworth et al. 2019 -0.25 ± 0.23
2016-08-25 Southworth et al. 2019 -0.05 ± 0.14
2016-08-21 Southworth et al. 2019 -0.21 ± 0.16
2016-08-13 Southworth et al. 2019 0.07 ± 0.14
2015-08-31 Southworth et al. 2019 0.16 ± 0.14
2015-08-27 Southworth et al. 2019 -0.42 ± 0.14
2015-08-23 Southworth et al. 2019 -0.03 ± 0.1
2014-09-24 Huitson et al. 2017 0.32 ± 0.09
2013-10-11 Huitson et al. 2017 0.48 ± 0.07
2012-10-16 Huitson et al. 2017 0.36 ± 0.09
2011-10-10 Huitson et al. 2017 0.31 ± 0.13
2011-09-28 Hoyer et al. 2013 0.5 ± 0.6
2011-09-24 Hoyer et al. 2013 0.92 ± 0.6
2010-09-29 Hoyer et al. 2013 0.81 ± 0.66
2009-10-28 Hoyer et al. 2013 0.45 ± 0.59
2009-09-26 Sanchis-Ojeda et al. 2011 -0.11 ± 0.09
2009-09-22 Hoyer et al. 2013 1.36 ± 0.33
2009-08-10 Sanchis-Ojeda et al. 2011 -0.13 ± 0.08
2009-08-06 Sanchis-Ojeda et al. 2011 0.09 ± 0.1
2009-08-02 Sanchis-Ojeda et al. 2011 0.18 ± 0.08
2009-07-29 Hoyer et al. 2013 1.03 ± 0.27
2008-10-13 Dragomir et al. 2011 0.1 ± 1.02
2008-10-09 Sanchis-Ojeda et al. 2011 0.04 ± 0.07
2008-10-01 Hoyer et al. 2013 0.35 ± 0.52
2008-10-01 Southworth et al. 2009 -0.32 ± 0.19
2008-09-23 Hoyer et al. 2013 0.5 ± 0.73
2008-09-23 Southworth et al. 2009 -0.68 ± 0.19
2008-09-19 Hoyer et al. 2013 1.07 ± 0.62
2008-08-27 Hoyer et al. 2013 0.23 ± 0.42
2008-08-23 Hoyer et al. 2013 0.72 ± 0.32
2008-08-23 Southworth et al. 2009 -0.19 ± 0.19
2008-08-19 Southworth et al. 2009 -0.22 ± 0.14
2008-08-19 Sanchis-Ojeda et al. 2011 -0.29 ± 0.08
2007-10-23 Gillon et al. 2009 -0.19 ± 0.07
2007-09-27 Gillon et al. 2009 -1.48 ± 0.48
2007-09-25 Gillon et al. 2009 -0.35 ± 0.32
2007-09-22 Wilson et al. 2008 -2.31 ± 0.36
2007-09-21 Gillon et al. 2009 -1.11 ± 1.08
2006-08-15 Gillon et al. 2009 0.08 ± 1.07
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