exoclock

WASP-103b (LOW)

Discovered by: Gillon et al. 2014

The Star
Simbad
GAIA
2MASS		 WASP-103
DR2 4439085988769170432
J16371556+0711000
RA 16:37:15.5753 DEC +07:11:00.119
Parallax
1.137 mas		 P.M. RA
-8.506 mas/y		 P.M. DEC
2.187 mas/y
MagV
12.1		 MagR*
11.971		 MagI*
11.386		 MagJ
11.1		 MagH
10.857		 MagK
10.767
MagG
12.193		 MagGBP
12.528		 MagGRP
11.7
*Calculated from GAIA magnitudes.

Ephemeris - Verified True
Kokori et al. 2025
Mid-time
2457497.135821 ± 2.9e-05 BJDTDB
Period
0.92554545 ± 3.6e-08 days
Transit Parameters
Southworth et al. 2016
Rp/Rs
0.1158 ± 0.0006		 a/Rs
3.013 +0.017 -0.027
 i
88.2 +1.5 -1.5 deg
e
-		 ω
- deg
DepthR*
17.76 mmag		 Duration*
2.67 hours
*Calculated from the other parameters, using PyLightcurve.
**Adjusted based on the space observations.

Limb Darkening Parameters
Gillon et al. 2014
Teff
6110.0 +160.0 -160.0 K
 Log(g)
4.22 +0.12 -0.05 cm/s2
 Fe/H
0.06 +0.13 -0.13 dex
ExoClock Status
Observing Priority LOW
Minimum aperture 5.66"
Total Observations (Recent) 144 (10)
O-C -1.48 ± 0.28 minutes
ExoClock Observations (Recent) 79 (10)
Space Observations (Recent) 0 (0)
ETD Observations (Recent) 0 (0)
Literature Mid-times (Recent) 65 (0)
Kepler Rp/Rs -
TESS Rp/Rs -

WASP-103b


ExoClock Observations
Planet
Observation Date		 Observer
Observatory		 Telescope
Camera / Filter / Exp [s]		 O-C
minutes
WASP-103b (LOW)
2026-06-05		MICHAIL KOUTROPOULOS
Stephanion Observatory		calestron c14
ZWO ASI294MM Pro / Clear / 11.0		1.74 ± 1.25
WASP-103b (LOW)
2026-06-02		Sophia Anderson
St. John's Observatory		Meade LX200
CCD / R / 120.0		-1.37 ± 1.73
WASP-103b (LOW)
2026-05-27		Yen-Hsing Lin
Starry House Observatory		Mewlon 300 CRS
ASI 6200MM Pro / Lum / 60.0		-3.16 ± 1.08
WASP-103b (LOW)
2026-05-24		David Wright
Goveryk (private observatory)		Ritchey-Chretien
QSI 683WSG-8 / R / 140.0		-0.28 ± 2.88
WASP-103b (LOW)
2026-05-24		Eric Miny
BSA NEW		NEWTON T305
Player One Poseidon / R / 180.0		-0.86 ± 2.02
WASP-103b (LOW)
2026-05-20		Darryl Madison
Ajijic Observatory		Celestron CPC 800 Edge HD
ZWO2400MC / Clear / 90.0		-0.07 ± 1.44
WASP-103b (LOW)
2026-05-03		Hao-Yuan Duan
Lulin Observatory		GSO RC12
player one / I / 60.0		-2.58 ± 2.88
WASP-103b (LOW)
2026-04-20		Hao-Yuan Duan
Lulin Observatory		GSO RC12
player one / I / 60.0		-7.14 ± 4.9
WASP-103b (LOW)
2025-07-17		Jordi González-Edo
Landete-Kea		C11
ASI 2600MM pro / Lum / 90.0		2.8 ± 1.21
WASP-103b (LOW)
2025-07-04		Giovanni Calapai
Home Astronomical Observatory		Celestron 11 Schmidt-Cassegrain
Atik 314L+ / Clear / 90.0		-1.05 ± 2.02
WASP-103b (LOW)
2025-05-28		Salvador Miquel Romero
Vedat Observatory		Meade SN10 F/4.1
SBIG ST8XME / Clear / 240.0		-0.6 ± 3.31
WASP-103b (LOW)
2025-05-16		Yves Jongen
Rasteau Observatory		Plane Wave CDK 17"
SBIG STXL 11002 / Lum / 180.0		1.94 ± 0.95
WASP-103b (LOW)
2025-05-16		Paolo Arcangelo Matassa
P:M.P.H.R. Deep Sky (K81)		Ritchey Chretien 40cm-F5.3
CCD ICX453AQ / Lum / 60.0		-0.03 ± 1.44
WASP-103b (LOW)
2025-05-16		Lorenzo Blasco
La Granada, Spain		Newton Skywatcher 150/750
SVBONY SV605MC / V / 240.0		-1.04 ± 3.02
WASP-103b (LOW)
2025-05-16		Ramon Naves
Montcabrer		Meade LX200 12" ACF
Moravian G4-9000 / ipr / 120.0		0.78 ± 1.17
WASP-103b (LOW)
2025-05-16		Yves Jongen
Rasteau Observatory		Plane Wave CDK 17"
SBIG STXL 11002 / Lum / 180.0		-3.31 ± 1.41
WASP-103b (LOW)
2025-05-03		Simon Dawes
William James II		Celestron Edge11 HD
Risingcam Monochrome SONY imx571 / Lum / 300.0		-2.0 ± 1.87
WASP-103b (LOW)
2025-05-03		Paolo Arcangelo Matassa
P:M.P.H.R. Deep Sky (K81)		Ritchey Chretien 40cm-F5.3
CCD ICX453AQ / Lum / 60.0		-1.07 ± 1.44
WASP-103b (LOW)
2025-05-03		Peter Teichrib
Samantha		APO130/910
ATIK414EXE Mono / Clear / 60.0		-1.64 ± 1.58
WASP-103b (LOW)
2025-04-04		Darryl Madison
Ajijic Observatory		Celestron CPC 800 Edge HD
ZWO2400MC / Clear / 90.0		0.53 ± 2.45
WASP-103b (LOW)
2024-07-09		Deborah Smith
El Olivar, Gergal, Spain		William Optics GT81
ASI2600MM / R / 160.0		3.59 ± 4.32
WASP-103b (LOW)
2024-07-08		Anaël Wünsche
El Sauce Observatory		CDK Planewave Chili
Moravian G4 16k / Lum / 120.0		0.21 ± 1.05
WASP-103b (LOW)
2024-07-08		Jean-Pascal Vignes
Deep Sky Chile		Planewave CDK400
QHYCCD 600M / Lum / 60.0		-5.11 ± 0.55
WASP-103b (LOW)
2024-06-26		Dominique DANIEL
La Montjoie		T250 Skyvision
Camera CMOS ZWO ASI2600MC pro (color) / Clear / 90.0		-0.6 ± 2.16
WASP-103b (LOW)
2024-06-02		John Collins
JC_Wrexham		Meade LX200GPS
ASI-290m / rpr / 120.0		1.02 ± 1.73
WASP-103b (LOW)
2024-05-20		Gerard Tartalo
Dark Energy Observatory		Ts Photoline triplet apo 115/800 F7
Qhy294M pro / rpr / 300.0		-3.02 ± 2.59
WASP-103b (LOW)
2024-05-20		Martin Crow
Burnham Observatory		Celestron C9.25
SX694 mono / Clear / 120.0		0.36 ± 2.59
WASP-103b (LOW)
2024-05-20		Ian Sharp
PixelSkies		Celestron C11 Edge HD
Starlight Xpress Trius Pro SX694 / R / 90.0		-6.99 ± 2.59
WASP-103b (LOW)
2024-05-07		Deborah Smith
El Olivar, Gergal, Spain		William Optics GT81
QHY9 / R / 90.0		-1.46 ± 4.32
WASP-103b (LOW)
2024-05-04		Nicolás Castro-Morales
El Sauce		Mas500
Moravian / rpr / 60.0		-1.31 ± 1.2
WASP-103b (LOW)
2024-05-03		Bryan Martin
Tiger Butte Observatory Remote		AG Optical IDK
ZWO ASI 294 / V / 180.0		-4.37 ± 3.17
WASP-103b (LOW)
2024-04-13		Miguel Ángel Álava Amat
Sarriguren		Meade SC 8"
Asi 1600 MM / Lum / 240.0		1.82 ± 1.87
WASP-103b (LOW)
2024-04-13		Paolo Arcangelo Matassa
P:M.P.H.R. Deep Sky (K81)		Ritchey Chretien 40cm-F5.3
CCD ICX453AQ / Lum / 60.0		-1.2 ± 2.02
WASP-103b (LOW)
2024-04-12		Miguel Ángel Álava Amat
Sarriguren		Meade SC 8"
Asi 1600 MM / Lum / 240.0		-0.89 ± 1.24
WASP-103b (LOW)
2024-04-03		Yen-Hsing Lin
NTHU TAT		GSO RC10
Apogee AltaF-6: KAF1001E / Clear / 60.0		-3.43 ± 1.87
WASP-103b (LOW)
2024-03-27		Darryl Madison
Ajijic Observatory		Celestron CPC 800 Edge HD
ZWO2400MC / Clear / 120.0		-1.17 ± 2.16
WASP-103b (LOW)
2023-07-15		Paolo Arcangelo Matassa
P:M.P.H.R. Deep Sky (K81)		Ritchey Chretien 40cm-F5.3
CCD ICX453AQ / Lum / 60.0		-1.83 ± 2.02
WASP-103b (LOW)
2023-07-02		Adam Popowicz
Otivar dome2		Newton 12" ASA
ASI ZWO 1600MM / R / 77.0		-0.34 ± 2.3
WASP-103b (LOW)
2023-07-02		Javier Alonso Santiago
INAF-OACT		Cassegrain 91cm
Moravian C4-1600EC / R / 60.0		-2.79 ± 1.87
WASP-103b (LOW)
2023-06-28		Bryan Martin
Tiger Butte Observatory Remote		AG Optical IDK
ZWO ASI 294 / Lum / 60.0		0.28 ± 2.16
WASP-103b (LOW)
2023-06-20		Paolo Arcangelo Matassa
P:M.P.H.R. Deep Sky (K81)		Ritchey Chretien 40cm-F5.3
CCD ICX453AQ / Lum / 60.0		-0.06 ± 3.02
WASP-103b (LOW)
2023-06-20		Antonio Ferretti
Anxanum Observatory		Meade LX200 ACF
QHY 268M / Clear / 180.0		-0.78 ± 1.73
WASP-103b (LOW)
2023-06-18		Jean-Pascal Vignes
Deep Sky Chile		Planewave CDK400
QHYCCD 600M / Lum / 60.0		-0.21 ± 1.41
WASP-103b (LOW)
2023-06-06		Magdalena Szkudlarek
Deep Sky Chile - ROTUZ		PlaneWave CDK 20
QHY268M pro / R / 49.0		0.84 ± 0.72
WASP-103b (LOW)
2023-05-26		Claudio Lopresti
Claudio Lopresti		Mak-Newton
CCD Sbig ST10xme / I / 240.0		-2.04 ± 2.45
WASP-103b (LOW)
2023-05-26		Stéphane Montchaud
Burgundy Observatory		Celestron 8
Zwo Asi 1600 / Lum / 120.0		-0.68 ± 1.87
WASP-103b (LOW)
2023-05-26		jean paul vergne
CH9-gapra		Ritchey Chretien
zwo 294mm pro / Lum / 120.0		-4.71 ± 1.58
WASP-103b (LOW)
2023-05-10		Anaël Wünsche
El Sauce Observatory		CDK Planewave Chili
Moravian G4 16k / Lum / 120.0		4.12 ± 1.14
WASP-103b (LOW)
2023-04-28		Jean-Pascal Vignes
Deep Sky Chile		Planewave CDK400
QHYCCD 600M / R / 60.0		-0.53 ± 0.99
WASP-103b (LOW)
2023-04-26		Bryan Martin
Tiger Butte Observatory Remote		AG Optical IDK
ZWO ASI 294 / R / 180.0		-0.31 ± 1.73
WASP-103b (LOW)
2023-04-17		David Molina
Anunaki Observatory Z51		Schmidt Cassegrain
SBIG ST-9xe / R / 120.0		0.77 ± 1.87
WASP-103b (LOW)
2022-06-24		Sacha Foschino
Observatoire des Baronnies Provençales		Planewave 430mm
SVO ASI 6200 MM Pro / Clear / 120.0		-0.03 ± 0.72
WASP-103b (LOW)
2022-06-12		Kevin Johnson
Holbrook Observatory		Meade LX10 EMC
Atik 383L+ / Lum / 90.0		1.9 ± 1.87
WASP-103b (LOW)
2022-05-05		Adrian Jones
Private Observatory (I64)		Meade ACF 30cm
QSI 583 / R / 150.0		0.98 ± 1.73
WASP-103b (LOW)
2022-04-23		Adam Popowicz
Observatory Pyskowice		RC12" GSO
ASI ZWO 1600 MM / ATIK 11000M / R / 180.0		-0.25 ± 5.76
WASP-103b (LOW)
2022-04-10		Leon Bewersdorff
Observatory Kipshoven (BLEW)		GSO Ritchey-Chrétien
QHY268M-PH / V / 60.0		1.02 ± 2.02
WASP-103b (LOW)
2022-04-10		Adam Popowicz
Otivar dome2		Newton 12" ASA
ASI ZWO 1600MM / R / 65.0		0.73 ± 1.44
WASP-103b (LOW)
2021-08-29		Yves Jongen
Deep Sky Chile		Plane Wave CDK 17"
Moravian 4G / R / 120.0		1.45 ± 1.44
WASP-103b (LOW)
2021-06-28		Yves Jongen
Deep Sky Chile		Plane Wave CDK 17"
Moravian 4G / R / 120.0		-0.93 ± 1.15
WASP-103b (LOW)
2021-06-16		Adam Popowicz
Observatory Pyskowice		RC12" GSO
ASI ZWO 1600 MM / ATIK 11000M / R / 120.0		1.0 ± 2.3
WASP-103b (LOW)
2021-06-16		Giuseppe Marino
Gruppo Astrofili Catanesi		Newtonian
SBIG ST-7 XME / Clear / 140.0		-1.01 ± 0.72
WASP-103b (LOW)
2021-06-04		Ivo Peretto
MarSEC Marana Space Explorer Center		R-C
Moravia G2-1600 MkII / Clear / 80.0		4.94 ± 1.3
WASP-103b (LOW)
2021-06-04		Massimiliano Mannucci
Osservatorio Astronomico Margherita Hack		Celestron C14
SBIG ST10 XME / Clear / 120.0		0.77 ± 0.86
WASP-103b (LOW)
2021-04-11		Yves Jongen
Deep Sky Chile		Plane Wave CDK 17"
Moravian 4G / R / 120.0		-3.64 ± 1.15
WASP-103b (LOW)
2021-03-30		Yves Jongen
Deep Sky Chile		Plane Wave CDK 17"
Moravian 4G / R / 120.0		-2.5 ± 1.3
WASP-103b (LOW)
2021-03-17		Yves Jongen
Deep Sky Chile		Plane Wave CDK 17"
Moravian 4G / R / 120.0		-0.29 ± 1.01
WASP-103b (LOW)
2020-06-08		Francois Regembal
HRTobs		Astrosib RC360
SBIG STX 16803 / Lum / 60.0		1.46 ± 0.86
WASP-103b (LOW)
2020-05-27		Roland Casali
Alto 2000		Ritchey Chretien
Kepler 400 sCMOS / I / 60.0		3.32 ± 1.3
WASP-103b (LOW)
2020-05-27		Roland Casali
Alto 2000		Ritchey Chretien
Kepler 400 sCMOS / R / 30.0		2.02 ± 1.44
WASP-103b (LOW)
2020-05-27		Mauro Caló
Cavallino		RC
SBIG ST10 / Lum / 60.0		0.29 ± 1.01
WASP-103b (LOW)
2020-05-27		Marc Deldem
Les Barres Observatory		Celestron C8
SBIG ST8-XME / Clear / 120.0		-0.65 ± 1.58
WASP-103b (LOW)
2020-05-14		John Savage
Z42 Rushay Farm Observatory		Celestron 14Edge
ZWO ASI6200MM / Clear / 180.0		3.23 ± 1.01
WASP-103b (LOW)
2020-05-14		Adrian Jones
Private Observatory (I64)		Meade ACF 30cm
QSI 583 / R / 90.0		1.5 ± 1.73
WASP-103b (LOW)
2020-05-14		Adrian Jones
Private Observatory (I64)		Meade ACF 30cm
QSI 583 / R / 60.0		1.13 ± 1.44
WASP-103b (LOW)
2020-04-07		Manfred Raetz
privat observatory Herges-Hallenberg		SCT 280 /1790 (Celestron C11 with reducer)
Moravian Instruments G2-1600 / Clear / 120.0		0.44 ± 1.44
WASP-103b (LOW)
2019-06-01		Anaël Wünsche
Observatoire des Baronnies Provençales		CDK Planewave
SBIG STL11K / Clear / 120.0		0.91 ± 1.15
WASP-103b (LOW)
2017-06-23		Anaël Wünsche
Observatoire des Baronnies Provençales		Astelco
FLIPL230 / Lum / 60.0		1.58 ± 0.86
WASP-103b (LOW)
2016-05-21		Marc Deldem
Les Barres Observatory		Celestron C8
SBIG ST8-XME / Clear / 120.0		-1.67 ± 1.58
WASP-103b (LOW)
2015-06-08		Ramon Naves
Montcabrer		Meade LX200 12" ACF
Sbig ST8xme / R / 120.0		0.4 ± 1.73

Literature Mid-times
Planet
Observation Date		 Reference O-C
minutes
2020-07-29 Baştürk et al. 2022 0.76 ± 0.86
2020-06-21 Barros et al. 2022 -0.2 ± 0.42
2020-06-20 Barros et al. 2022 -0.38 ± 0.36
2020-06-19 Barros et al. 2022 0.35 ± 0.33
2020-06-14 Barros et al. 2022 -0.33 ± 0.32
2020-06-07 Barros et al. 2022 0.34 ± 0.33
2020-05-26 Barros et al. 2022 -0.04 ± 0.33
2020-05-19 Barros et al. 2022 -0.08 ± 0.35
2020-05-16 Barros et al. 2022 -0.33 ± 0.56
2020-05-05 Barros et al. 2022 -0.28 ± 0.52
2020-05-02 Barros et al. 2022 1.18 ± 0.36
2020-04-19 Barros et al. 2022 0.55 ± 0.53
2018-08-09 Maciejewski et al. 2018 -0.47 ± 0.68
2018-07-01 Baştürk et al. 2022 -0.72 ± 0.64
2018-06-19 Maciejewski et al. 2018 0.25 ± 0.79
2018-06-18 Maciejewski et al. 2018 0.32 ± 0.43
2018-06-06 Maciejewski et al. 2018 -0.5 ± 0.4
2018-05-12 Maciejewski et al. 2018 0.13 ± 0.45
2018-05-11 Maciejewski et al. 2018 -0.39 ± 0.42
2017-06-23 Maciejewski et al. 2018 -0.37 ± 0.58
2017-06-11 Baştürk et al. 2022 -0.21 ± 0.98
2017-05-16 Maciejewski et al. 2018 0.52 ± 0.86
2017-05-04 Maciejewski et al. 2018 -0.58 ± 0.92
2017-05-01 Kirk et al. 2021 0.01 ± 0.49
2017-05-01 Kirk et al. 2021 -0.03 ± 0.13
2017-04-17 Patra et al. 2020 -0.22 ± 0.42
2017-04-05 Kirk et al. 2021 0.29 ± 0.28
2016-06-27 Kirk et al. 2021 -0.16 ± 0.17
2016-06-12 Patra et al. 2020 0.2 ± 0.55
2016-06-02 Kirk et al. 2021 0.08 ± 0.2
2016-05-30 Patra et al. 2020 0.19 ± 0.43
2016-05-09 Maciejewski et al. 2018 1.2 ± 1.45
2016-05-08 Maciejewski et al. 2018 0.11 ± 1.67
2016-05-08 Maciejewski et al. 2018 -0.97 ± 1.08
2016-05-04 Patra et al. 2020 -0.05 ± 0.45
2016-05-03 Lendl et al. 2017 -0.21 ± 0.11
2016-05-03 Kirk et al. 2021 -0.37 ± 0.13
2015-07-10 Kirk et al. 2021 -0.53 ± 0.51
2015-07-02 Kirk et al. 2021 -0.11 ± 0.17
2015-06-27 Kirk et al. 2021 -0.37 ± 0.54
2015-06-08 Baştürk et al. 2022 -0.25 ± 0.35
2015-06-06 Kirk et al. 2021 0.19 ± 0.18
2015-06-05 Kirk et al. 2021 -0.28 ± 0.36
2015-06-04 Turner et al. 2017 -0.63 ± 2.16
2015-05-01 Baştürk et al. 2022 0.02 ± 0.26
2014-08-13 Southworth et al. 2015 1.52 ± 0.72
2014-07-19 Southworth et al. 2015 0.42 ± 0.36
2014-07-19 Southworth et al. 2015 0.12 ± 0.36
2014-07-19 Southworth et al. 2015 0.09 ± 0.24
2014-07-19 Southworth et al. 2015 -0.02 ± 0.32
2014-07-19 Southworth et al. 2015 -0.12 ± 0.2
2014-07-18 Southworth et al. 2015 0.01 ± 0.26
2014-07-06 Southworth et al. 2015 0.75 ± 0.43
2014-07-06 Southworth et al. 2015 0.28 ± 0.33
2014-07-06 Southworth et al. 2015 0.2 ± 0.49
2014-07-06 Southworth et al. 2015 0.19 ± 0.27
2014-07-06 Southworth et al. 2015 0.07 ± 0.27
2014-06-27 Delrez et al. 2018 0.08 ± 0.09
2014-06-24 Southworth et al. 2015 -0.26 ± 0.35
2014-06-23 Southworth et al. 2015 -0.31 ± 0.56
2014-06-09 Southworth et al. 2015 0.37 ± 0.39
2014-05-31 Baştürk et al. 2022 0.76 ± 0.43
2014-05-02 Southworth et al. 2015 0.87 ± 0.32
2014-04-20 Southworth et al. 2015 -0.33 ± 0.24
2013-06-16 Gillon et al. 2014 0.29 ± 1.08
© 2019-2025 ExoClock Project - Privacy policy - Contact: exoclockproject@gmail.com
The ExoClock Project is managed by the PULSAR Non-profit Civil Law Company / Address: Pipsou 18A, 54627 Thessaloniki, Greece / VAT: EL996400186 / Tax Office: E Thessaloniki