exoclock

WASP-138b (MEDIUM)

Discovered by: Lam et al. 2017

The Star
Simbad
GAIA
2MASS
WASP-138
DR2 2498515516990171392
J02463338-0027501
RA 02:46:33.3867 DEC -00:27:50.316
Parallax
2.386 mas
P.M. RA
11.247 mas/y
P.M. DEC
-34.464 mas/y
MagV
11.79
MagR
11.74
MagI*
11.182
MagJ
10.782
MagH
10.54
MagK
10.494
MagG
11.687
MagGBP
11.968
MagGRP
11.263
*Calculated from GAIA magnitudes.

Ephemeris - Verified True
Kokori et al. 2022
Mid-time
2458257.03694 ± 0.00036 BJDTDB
Period
3.6344327 ± 1.5e-06 days

Transit Parameters
Lam et al. 2017
Rp/Rs
0.0826 ± 0.0008
a/Rs**
7.39 +0.15 -0.15
i
88.5 +0.9 -1.2 deg
e
-
ω
- deg
DepthR*
8.91 mmag
Duration*
4.02 hours
*Calculated from the other parameters, using PyLightcurve.
**Adjusted based on the space observations.

Limb Darkening Parameters
Lam et al. 2017
Teff
6272.0 +96.0 -96.0 K
Log(g)
4.25 +0.02 -0.02 cm/s2
Fe/H
-0.09 +0.1 -0.1 dex
ExoClock Status
Observing Priority MEDIUM
Minimum aperture 7.22"
Total Observations (Recent) 14 (1)
O-C 1.06 ± 0.57 minutes
ExoClock Observations (Recent) 3 (1)
Space Observations (Recent) 10 (0)
ETD Observations (Recent) 0 (0)
Literature Mid-times (Recent) 1 (0)
Kepler Rp/Rs -
TESS Rp/Rs 0.08722 ± 0.00055

WASP-138b


ExoClock Observations

Planet
Observation Date
Observer
Observatory
Telescope
Camera / Filter / Exp [s]
O-C
minutes
WASP-138b (MEDIUM)
2021-11-06
Robert Roth
TURMX Observatory
Planewave CDK17
QHY600M / rpr / 60.0
1.22 ± 1.73
WASP-138b (MEDIUM)
2020-12-14
Carmelo Falco
GALHassin Robotic Telescope 2 (GRT2)
Giacometti-Fogale RC16
Andor Apogee Aspen CG16M / rpr / 60.0
3.3 ± 2.3
WASP-138b (MEDIUM)
2020-12-14
Carmelo Falco
GAL Hassin Robotic Telescope 2 (GRT2) - Multiband
Giacometti-Fogale RC16 - 2
Andor Apogee Aspen CG16M / gpr / 60.0
-0.73 ± 3.02

Space Observations

Planet
Observation Date
Mission O-C
minutes
WASP-138b (MEDIUM)
2020-11-15
TESS2.02 ± 1.18
WASP-138b (MEDIUM)
2020-11-12
TESS0.78 ± 1.27
WASP-138b (MEDIUM)
2020-11-08
TESS0.76 ± 1.24
WASP-138b (MEDIUM)
2020-11-01
TESS-0.17 ± 1.44
WASP-138b (MEDIUM)
2020-10-28
TESS0.63 ± 1.18
WASP-138b (MEDIUM)
2020-10-24
TESS1.37 ± 1.44
WASP-138b (MEDIUM)
2018-11-12
TESS-0.95 ± 1.41
WASP-138b (MEDIUM)
2018-11-08
TESS-4.19 ± 1.44
WASP-138b (MEDIUM)
2018-11-05
TESS-4.14 ± 1.44
WASP-138b (MEDIUM)
2018-10-21
TESS-4.17 ± 1.27

Literature Mid-times

Planet
Observation Date
Reference O-C
minutes
2015-10-31 Lam et al. 2017 0.65 ± 0.46
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