exoclock

WASP-139b (MEDIUM)

Discovered by: Hellier et al. 2017

The Star
Simbad
GAIA
2MASS		 WASP-139
DR2 4851398799032507776
J03181493-4118077
RA 03:18:14.9435 DEC -41:18:07.664
Parallax
4.678 mas		 P.M. RA
-16.0 mas/y		 P.M. DEC
24.512 mas/y
MagV
12.48		 MagR
12.3		 MagI
11.59		 MagJ
10.982		 MagH
10.575		 MagK
10.472
MagG
12.271		 MagGBP
12.733		 MagGRP
11.677
*Calculated from GAIA magnitudes.

Ephemeris - Verified True
Kokori et al. 2025
Mid-time
2458482.35988 ± 0.00023 BJDTDB
Period
5.9242656 ± 1.5e-06 days
Transit Parameters
Hellier et al. 2017
Rp/Rs
0.1034 ± 0.0015		 a/Rs
17.19 +0.54 -0.54
 i
88.9 +0.5 -0.5 deg
e
-		 ω
- deg
DepthR*
14.11 mmag		 Duration*
2.77 hours
*Calculated from the other parameters, using PyLightcurve.
**Adjusted based on the space observations.

Limb Darkening Parameters
Hellier et al. 2017
Teff
5310.0 +90.0 -90.0 K
 Log(g)
4.59 +0.06 -0.06 cm/s2
 Fe/H
0.2 +0.09 -0.09 dex
ExoClock Status
Observing Priority MEDIUM
Minimum aperture 6.27"
Total Observations (Recent) 27 (1)
O-C 1.05 ± 0.75 minutes
ExoClock Observations (Recent) 9 (1)
Space Observations (Recent) 16 (0)
ETD Observations (Recent) 1 (0)
Literature Mid-times (Recent) 1 (0)
Kepler Rp/Rs -
TESS Rp/Rs 0.10049 ± 0.00056

WASP-139b


ExoClock Observations
Planet
Observation Date		 Observer
Observatory		 Telescope
Camera / Filter / Exp [s]		 O-C
minutes
WASP-139b (MEDIUM)
2026-01-01		Yves Jongen
Deep Sky Chile		Plane Wave CDK 17"
Moravian 4G / Lum / 120.0		0.38 ± 0.96
WASP-139b (MEDIUM)
2024-09-14		Yves Jongen
Deep Sky Chile		Plane Wave CDK 17"
Moravian 4G / Lum / 180.0		2.35 ± 1.44
WASP-139b (MEDIUM)
2024-09-08		Jean-Pascal Vignes
Deep Sky Chile		Planewave CDK400
QHYCCD 600M / Lum / 60.0		1.58 ± 2.3
WASP-139b (MEDIUM)
2024-02-02		Yves Jongen
Deep Sky Chile		Plane Wave CDK 17"
Moravian 4G / Lum / 120.0		2.15 ± 1.25
WASP-139b (MEDIUM)
2023-11-05		Yves Jongen
Deep Sky Chile		Plane Wave CDK 17"
Moravian 4G / Lum / 120.0		-1.72 ± 1.05
WASP-139b (MEDIUM)
2023-11-05		Jean-Pascal Vignes
Deep Sky Chile		PlaneWave CDK 17"
QHYCCD 600 M / Lum / 120.0		-5.18 ± 2.02
WASP-139b (MEDIUM)
2021-12-06		Yves Jongen
Deep Sky Chile		Plane Wave CDK 17"
Moravian 4G / Lum / 120.0		-1.37 ± 1.3
WASP-139b (MEDIUM)
2021-11-30		Yves Jongen
Deep Sky Chile		Plane Wave CDK 17"
Moravian 4G / Lum / 120.0		2.9 ± 1.01
WASP-139b (MEDIUM)
2020-10-29		Yves Jongen
Deep Sky Chile		Plane Wave CDK 17"
Moravian 4G / Lum / 120.0		-1.29 ± 1.3

Space Observations
Planet
Observation Date		 Mission O-C
minutes
WASP-139b (MEDIUM)
2020-11-16		TESS1.71 ± 1.14
WASP-139b (MEDIUM)
2020-11-10		TESS1.03 ± 1.35
WASP-139b (MEDIUM)
2020-10-29		TESS2.79 ± 1.27
WASP-139b (MEDIUM)
2020-10-23		TESS0.62 ± 1.12
WASP-139b (MEDIUM)
2020-10-17		TESS-0.84 ± 1.34
WASP-139b (MEDIUM)
2020-10-11		TESS0.58 ± 1.44
WASP-139b (MEDIUM)
2020-09-29		TESS0.12 ± 1.27
WASP-139b (MEDIUM)
2020-09-23		TESS-2.5 ± 1.38
WASP-139b (MEDIUM)
2018-11-12		TESS0.5 ± 1.14
WASP-139b (MEDIUM)
2018-11-06		TESS1.27 ± 1.21
WASP-139b (MEDIUM)
2018-10-25		TESS2.58 ± 1.38
WASP-139b (MEDIUM)
2018-10-19		TESS-0.9 ± 1.04
WASP-139b (MEDIUM)
2018-10-13		TESS1.8 ± 1.25
WASP-139b (MEDIUM)
2018-10-07		TESS-3.03 ± 1.24
WASP-139b (MEDIUM)
2018-10-01		TESS0.62 ± 1.02
WASP-139b (MEDIUM)
2018-09-26		TESS-1.56 ± 1.09

ETD Observations
Planet
Observation Date		 Observer(s) ETD link O-C
minutes
WASP-139b (MEDIUM)
2021-09-02		Yves Jongen16306138800.84 ± 1.15

Literature Mid-times
Planet
Observation Date		 Reference O-C
minutes
2015-06-23 Hellier et al. 2017 -0.21 ± 0.43
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