exoclock

WASP-18b

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. 2021
Mid-time
2455562.11007 ± 7e-05 BJDTDB
Period
0.94145254 ± 8e-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 to produce a duration that matches the 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
ExoClock Observations (Recent)
Space Observations
Literature Mid-times
ETD Observations
O-C minutes
MEDIUM
3 (0)

11

0.6±0.6

WASP-18b


ExoClock Observations

Observation
Date
Observer
Observatory
Telescope
Camera / Filter / Exp [s]
O-C
minutes
2020-11-03 Yves Jongen
Deep Sky Chile
Plane Wave CDK 17"
Moravian 4G / R / 60.0
2.1 ± 0.9 - Data available
2020-11-01 Yves Jongen
Deep Sky Chile
Plane Wave CDK 17"
Moravian 4G / R / 60.0
-0.7 ± 0.9 - Data available
2020-10-31 Yves Jongen
Deep Sky Chile
Plane Wave CDK 17"
Moravian 4G / R / 60.0
-0.0 ± 1.3 - Data available


Literature Mid-times

Observation
Date
Mid-time Time format Reference O-C
minutes
2015-10-24 2457319.801 ± 0.00039 BJD_TDB Wilkins et al. 2017 -1.4 ± 0.6
2015-08-21 2457255.7832 ± 0.0003 BJD_TDB Wilkins et al. 2017 0.0 ± 0.4
2014-08-26 2456896.1478 ± 0.0008 BJD_TDB Wilkins et al. 2017 -0.7 ± 1.2
2011-11-11 2455876.5559 ± 0.0013 BJD_TDB Maxted et al. 2013 1.0 ± 1.9
2011-01-09 2455570.584 ± 0.00048 BJD_TDB Maxted et al. 2013 1.2 ± 0.7
2010-12-24 2455554.5786 ± 0.0005 BJD_TDB Maxted et al. 2013 0.2 ± 0.7
2010-10-04 2455473.6144 ± 0.0009 BJD_TDB Maxted et al. 2013 1.3 ± 1.3
2010-10-01 2455470.7885 ± 0.0004 BJD_TDB Maxted et al. 2013 -1.0 ± 0.6
2010-08-23 2455432.1897 ± 0.0001 BJD_TDB Maxted et al. 2013 0.1 ± 0.1
2010-01-24 2455221.3042 ± 0.0001 BJD_TDB Maxted et al. 2013 -0.1 ± 0.1
2007-04-30 2454221.48163 ± 0.00038 BJD_TDB Hellier et al. 2009 -0.0 ± 0.5
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