exoclock

WASP-118b (MEDIUM)

Discovered by: Hay et al. 2016

The Star
Simbad
GAIA
2MASS
WASP-118
DR2 2562569564026683520
J01181213+0242102
RA 01:18:12.1381 DEC +02:42:10.251
Parallax
2.628 mas
P.M. RA
2.461 mas/y
P.M. DEC
-14.595 mas/y
MagV
11.04
MagR
10.98
MagI*
10.444
MagJ
10.087
MagH
9.847
MagK
9.788
MagG
10.92
MagGBP
11.201
MagGRP
10.51
*Calculated from GAIA magnitudes.

Ephemeris - Verified True
Kokori et al. 2025
Mid-time
2457961.16877 ± 0.00018 BJDTDB
Period
4.0460508 ± 7.1e-07 days

Transit Parameters
Močnik et al. 2017
Rp/Rs
0.08173 ± 6e-05
a/Rs
6.707 +0.06 -0.06
i
88.24 +0.14 -0.14 deg
e
-
ω
- deg
DepthR*
8.7 mmag
Duration*
4.92 hours
*Calculated from the other parameters, using PyLightcurve.
**Adjusted based on the space observations.

Limb Darkening Parameters
Hay et al. 2016
Teff
6410.0 +125.0 -125.0 K
Log(g)
4.1 +0.01 -0.01 cm/s2
Fe/H
0.16 +0.1 -0.1 dex
ExoClock Status
Observing Priority MEDIUM
Minimum aperture 5.83"
Total Observations (Recent) 32 (2)
O-C -0.19 ± 3.1 minutes
ExoClock Observations (Recent) 9 (2)
Space Observations (Recent) 22 (0)
ETD Observations (Recent) 0 (0)
Literature Mid-times (Recent) 1 (0)
Kepler Rp/Rs 0.080701 ± 9.9e-05
TESS Rp/Rs 0.08078 ± 0.00031

WASP-118b


ExoClock Observations

Planet
Observation Date
Observer
Observatory
Telescope
Camera / Filter / Exp [s]
O-C
minutes
WASP-118b (MEDIUM)
2025-12-10
Kohji Tsumura
Tokyo City University
Vixen VC200L
ZWO ASI 1600MM-PRO / R / 180.0
-2.84 ± 8.5
WASP-118b (MEDIUM)
2025-10-26
Ivo Silvestri
Trevinca Skies
Skywatcher Newton 250pds
ASI2600MM Duo / rpr / 30.0
2.71 ± 6.48
WASP-118b (MEDIUM)
2024-10-31
Paolo Arcangelo Matassa
P:M.P.H.R. Deep Sky (K81)
Ritchey Chretien 40cm-F5.3
CCD ICX453AQ / Lum / 60.0
1.59 ± 4.9
WASP-118b (MEDIUM)
2024-10-31
Pierre Farissier
Astroqueyras
FF 200
Moravian G2 4000 / R / 60.0
-4.46 ± 6.34
WASP-118b (MEDIUM)
2023-11-18
Miguel Ángel Álava Amat
Sarriguren
Meade SC 8"
Asi 1600 MM / rpr / 240.0
-4.07 ± 3.17
WASP-118b (MEDIUM)
2023-11-14
Martin Crow
Burnham Observatory
Celestron C9.25
SX694 mono / R / 100.0
0.9 ± 2.3
WASP-118b (MEDIUM)
2021-12-10
Martin Crow
Burnham Observatory
Celestron C9.25
SX694 mono / R / 90.0
3.69 ± 2.88
WASP-118b (MEDIUM)
2021-10-11
Yves Jongen
Deep Sky Chile
Plane Wave CDK 17"
Moravian 4G / R / 120.0
-0.39 ± 2.59
WASP-118b (MEDIUM)
2021-10-03
Georgios Lekkas
Teide Observatory / 0.4 meter telescope
Meade 16-inch
SBIG STL6303 / rpr / 60.0
0.04 ± 5.76

Space Observations

Planet
Observation Date
Mission O-C
minutes
WASP-118b (MEDIUM)
2023-10-13
TESS-2.1 ± 1.31
WASP-118b (MEDIUM)
2023-10-09
TESS-1.05 ± 1.11
WASP-118b (MEDIUM)
2023-10-05
TESS0.09 ± 1.12
WASP-118b (MEDIUM)
2023-09-23
TESS1.58 ± 1.11
WASP-118b (MEDIUM)
2021-10-07
TESS0.53 ± 1.09
WASP-118b (MEDIUM)
2021-10-03
TESS-1.17 ± 0.99
WASP-118b (MEDIUM)
2021-09-20
TESS2.09 ± 1.07
WASP-118b (MEDIUM)
2021-09-16
TESS0.45 ± 1.11
WASP-118b (MEDIUM)
2021-09-12
TESS1.23 ± 1.11
WASP-118b (MEDIUM)
2021-09-08
TESS-1.31 ± 1.12
WASP-118b (MEDIUM)
2021-09-04
TESS-0.18 ± 0.99
WASP-118b (MEDIUM)
2021-08-27
TESS-0.71 ± 1.11
WASP-118b (MEDIUM)
2021-08-23
TESS0.83 ± 1.07
WASP-118b (MEDIUM)
2016-03-16
K20.1 ± 0.52
WASP-118b (MEDIUM)
2016-03-07
K2-0.94 ± 0.55
WASP-118b (MEDIUM)
2016-02-28
K2-1.15 ± 0.49
WASP-118b (MEDIUM)
2016-02-20
K22.27 ± 0.58
WASP-118b (MEDIUM)
2016-02-16
K21.94 ± 0.43
WASP-118b (MEDIUM)
2016-02-12
K2-1.45 ± 0.59
WASP-118b (MEDIUM)
2016-01-27
K20.69 ± 0.63
WASP-118b (MEDIUM)
2016-01-19
K2-0.42 ± 0.45
WASP-118b (MEDIUM)
2016-01-11
K2-1.84 ± 0.48

Literature Mid-times

Planet
Observation Date
Reference O-C
minutes
2014-05-10 Hay et al. 2016 1.44 ± 0.89
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