exoclock

WASP-1b (LOW)

Discovered by: Collier Cameron et al. 2007

The Star
Simbad
GAIA
2MASS		 WASP-1
DR2 2862548428079638912
J00204007+3159239
RA 00:20:40.0746 DEC +31:59:23.953
Parallax
2.517 mas		 P.M. RA
-4.706 mas/y		 P.M. DEC
-3.237 mas/y
MagV
11.31		 MagR*
11.325		 MagI*
10.655		 MagJ
10.586		 MagH
10.364		 MagK
10.276
MagG
11.535		 MagGBP
11.844		 MagGRP
11.085
*Calculated from GAIA magnitudes.

Ephemeris - Verified True
Kokori et al. 2025
Mid-time
2457294.28313 ± 0.00013 BJDTDB
Period
2.51994683 ± 1.4e-07 days
Transit Parameters
Maciejewski et al. 2014
Rp/Rs
0.1036 ± 0.0008		 a/Rs
5.69 +0.03 -0.06
 i
90.0 +1.3 -1.3 deg
e
-		 ω
- deg
DepthR*
14.21 mmag		 Duration*
3.76 hours
*Calculated from the other parameters, using PyLightcurve.
**Adjusted based on the space observations.

Limb Darkening Parameters
Torres et al. 2008
Teff
6110.0 +75.0 -75.0 K
 Log(g)
4.28 +0.16 -0.16 cm/s2
 Fe/H
0.26 +0.08 -0.08 dex
ExoClock Status
Observing Priority LOW
Minimum aperture 5.0"
Total Observations (Recent) 72 (7)
O-C -0.63 ± 0.56 minutes
ExoClock Observations (Recent) 44 (7)
Space Observations (Recent) 8 (0)
ETD Observations (Recent) 0 (0)
Literature Mid-times (Recent) 20 (0)
Kepler Rp/Rs -
TESS Rp/Rs 0.10333 ± 0.00049

WASP-1b


ExoClock Observations
Planet
Observation Date		 Observer
Observatory		 Telescope
Camera / Filter / Exp [s]		 O-C
minutes
WASP-1b (LOW)
2025-11-03		Gerard Tartalo
Dark Energy Observatory		Ts RC8" Carbon
Player One Ares M (imx533M) / Clear / 240.0		-8.05 ± 1.73
WASP-1b (LOW)
2025-10-24		Snaevarr Guðmundsson
Ness Observatory		Meade LX 200 ACF Schmidt-Cassegrain
SBIG STL 11000M / R / 90.0		-0.87 ± 1.58
WASP-1b (LOW)
2025-09-29		Hao-Yuan Duan
Taipei Astronomical Museum, Taiwan		Takahashi TOA-130
QHY163M / I / 60.0		-6.96 ± 6.77
WASP-1b (LOW)
2025-09-12		samuel Diaz Lopez
Tomas Lopez (AstroCamp)		SCA260
ASI2600MM / rpr / 60.0		2.01 ± 1.73
WASP-1b (LOW)
2025-09-07		Jean-Baptiste Marquette
MrKite47		Newton Sky-Watcher 250/1000
ZWO ASI183MM Pro / R / 180.0		-1.89 ± 2.74
WASP-1b (LOW)
2025-08-27		Vojtěch Školník
Broumov NM Observatory		Meade LX90 ACF
MI C2-7000A / Clear / 60.0		7.74 ± 2.16
WASP-1b (LOW)
2025-08-22		Claudio Lopresti
Claudio Lopresti		Mak-Newton
CCD Sbig ST10xme / I / 240.0		2.69 ± 4.46
WASP-1b (LOW)
2024-12-03		Anaël Wünsche
Observatoire des Baronnies Provençales		CDK Planewave 2
ZWO ASI6200 / R / 120.0		0.83 ± 1.27
WASP-1b (LOW)
2024-11-21		Bryan Martin
Tiger Butte Observatory Remote		AG Optical IDK
ZWO ASI 294 / R / 150.0		-2.73 ± 1.38
WASP-1b (LOW)
2024-10-16		Salvador Miquel Romero
Vedat Observatory		Meade SN10 F/4.1
SBIG ST8XME / Clear / 166.0		-2.12 ± 3.46
WASP-1b (LOW)
2024-10-16		Salvador Miquel Romero
Vedat Observatory		Meade SN10 F/4.1
SBIG ST8XME / Lum / 166.0		-2.69 ± 3.46
WASP-1b (LOW)
2024-08-25		Simon Dawes
William James II		Celestron Edge11 HD
Risingcam Monochrome SONY imx571 / Lum / 300.0		4.63 ± 6.77
WASP-1b (LOW)
2024-08-25		Martin Crow
Burnham Observatory		Celestron C9.25
SX694 mono / R / 120.0		1.31 ± 1.87
WASP-1b (LOW)
2024-08-19		Paolo Arcangelo Matassa
P:M.P.H.R. Deep Sky (K81)		Ritchey Chretien 40cm-F5.3
CCD ICX453AQ / Lum / 60.0		-2.3 ± 3.46
WASP-1b (LOW)
2023-10-15		Adrian Jones
Private Observatory (I64)		Meade ACF 30cm
QSI 583 / R / 125.0		0.21 ± 1.07
WASP-1b (LOW)
2023-10-09		Marc Serrau
A77 - Dauban		Meade SC 12"
QHY260MM / rpr / 180.0		-2.0 ± 1.22
WASP-1b (LOW)
2023-10-09		Paolo Arcangelo Matassa
P:M.P.H.R. Deep Sky (K81)		Ritchey Chretien 40cm-F5.3
CCD ICX453AQ / Lum / 60.0		-2.51 ± 1.73
WASP-1b (LOW)
2023-10-09		Esteban Reina
Observatori de Masquefa		Meade LX200
ZWO ASI 294 MM Pro / R / 180.0		-2.65 ± 1.58
WASP-1b (LOW)
2023-08-13		Xesco Rubia
Stupa Observatory		CDK14
QHY600PH M BSI / rpr / 90.0		0.77 ± 1.87
WASP-1b (LOW)
2022-11-13		Manfred Raetz
privat observatory Herges-Hallenberg		SCT 280 /1790 (Celestron C11 with reducer)
Moravian Instruments G2-1600 / AstrodonExoPlanet-BB / 120.0		2.87 ± 1.44
WASP-1b (LOW)
2022-11-13		Thomas Mollier
Tomastro		Newtonian
ZWO ASI1600MMC / rpr / 60.0		2.58 ± 2.02
WASP-1b (LOW)
2022-11-13		Thomas Mollier
Tomastro		Newtonian
ZWO ASI1600MMC / Clear / 60.0		1.14 ± 2.16
WASP-1b (LOW)
2022-10-02		Adam Popowicz
Otivar dome2		Newton 12" ASA
ASI ZWO 1600MM / R / 40.0		0.42 ± 1.87
WASP-1b (LOW)
2022-10-02		David Quiles
David Quiles Observatory		Celestron DEGEHD 800
ZWO ASI 1600 MM / R / 120.0		-4.77 ± 2.02
WASP-1b (LOW)
2022-09-21		Albino Carbognani
Loiano Home		Schmidt-Cassegrain
ASI 178 mm cooled / Clear / 120.0		0.37 ± 1.02
WASP-1b (LOW)
2022-09-21		Manfred Raetz
privat observatory Herges-Hallenberg		SCT 280 /1790 (Celestron C11 with reducer)
Moravian Instruments G2-1600 / AstrodonExoPlanet-BB / 120.0		0.27 ± 0.82
WASP-1b (LOW)
2022-09-21		Paolo Arcangelo Matassa
P:M.P.H.R. Deep Sky (K81)		Ritchey Chretien 40cm-F5.3
CCD ICX453AQ / Lum / 120.0		-0.75 ± 1.87
WASP-1b (LOW)
2022-09-21		Stéphane Montchaud
Burgundy Observatory		Celestron 8
Zwo Asi 1600 / Lum / 60.0		-1.47 ± 1.73
WASP-1b (LOW)
2021-10-26		Dominique DANIEL
La Montjoie		Celestron CGX C8 XLT
Camera CMOS ZWO ASI294MC pro (color) / Clear / 240.0		-2.86 ± 1.87
WASP-1b (LOW)
2020-10-13		Mauro Caló
Cavallino		RC
SBIG ST10 / Lum / 60.0		-4.12 ± 1.58
WASP-1b (LOW)
2020-09-01		Yves Jongen
Rasteau Observatory		Plane Wave CDK 17"
SBIG STXL 11002 / R / 120.0		0.05 ± 1.3
WASP-1b (LOW)
2020-09-01		Francois Regembal
HRTobs		Astrosib RC360
SBIG STX 16803 / Lum / 60.0		-2.69 ± 3.31
WASP-1b (LOW)
2020-08-26		Danilo Sedita
Osservatorio Sedita Castrofilippo		RC GSO 14"
Moravian G2-1600 / R / 60.0		2.63 ± 1.15
WASP-1b (LOW)
2020-08-21		Nikolaos Paschalis
Nunki Observatory		Officina Stellare RILA 400
SBIG STXL 11002 / R / 60.0		2.91 ± 2.45
WASP-1b (LOW)
2020-08-21		Yves Jongen
Rasteau Observatory		Plane Wave CDK 17"
SBIG STXL 11002 / R / 120.0		1.04 ± 1.73
WASP-1b (LOW)
2020-08-21		Martin Crow
Burnham Observatory		Celestron C9.25
SX694 mono / R / 60.0		0.75 ± 2.02
WASP-1b (LOW)
2019-10-11		Anaël Wünsche
Observatoire des Baronnies Provençales		Astelco
FLIPL230 / V / 120.0		3.28 ± 0.86
WASP-1b (LOW)
2018-11-15		Anaël Wünsche
Observatoire des Baronnies Provençales		CDK Planewave
SBIG STL11K / Clear / 120.0		1.31 ± 2.74
WASP-1b (LOW)
2018-11-15		Manfred Raetz
privat observatory Herges-Hallenberg		SCT 280 /1790 (Celestron C11 with reducer)
Moravian Instruments G2-1600 / R / 120.0		0.36 ± 0.82
WASP-1b (LOW)
2018-10-03		Anaël Wünsche
Observatoire des Baronnies Provençales		Astelco
FLIPL230 / Clear / 60.0		0.73 ± 0.58
WASP-1b (LOW)
2016-12-27		Anaël Wünsche
Observatoire des Baronnies Provençales		Astelco
FLIPL230 / Lum / 120.0		2.01 ± 1.15
WASP-1b (LOW)
2016-09-08		Marc Deldem
Les Barres Observatory		Celestron C8
SBIG ST8-XME / Clear / 120.0		-1.65 ± 1.3
WASP-1b (LOW)
2013-10-03		Manfred Raetz
privat observatory Herges-Hallenberg		SCT 280 /1790 (Celestron C11 with reducer)
Moravian Instruments G2-1600 / Clear / 90.0		2.24 ± 1.44
WASP-1b (LOW)
2010-10-17		Ramon Naves
Montcabrer		Meade LX200 12" ACF
Sbig ST8xme / R / 120.0		-3.53 ± 3.02

Space Observations
Planet
Observation Date		 Mission O-C
minutes
WASP-1b (LOW)
2022-10-27		TESS-0.69 ± 0.92
WASP-1b (LOW)
2022-10-24		TESS-0.04 ± 0.86
WASP-1b (LOW)
2022-10-19		TESS-0.4 ± 0.88
WASP-1b (LOW)
2022-10-17		TESS0.52 ± 0.98
WASP-1b (LOW)
2022-10-09		TESS0.62 ± 0.82
WASP-1b (LOW)
2022-10-07		TESS1.13 ± 0.84
WASP-1b (LOW)
2022-10-04		TESS-0.44 ± 0.96
WASP-1b (LOW)
2022-10-02		TESS-1.06 ± 0.84

Literature Mid-times
Planet
Observation Date		 Reference O-C
minutes
2013-11-09 Maciejewski et al. 2014 -0.79 ± 2.45
2013-10-23 Turner et al. 2016 -0.89 ± 1.3
2013-10-23 Turner et al. 2016 -1.61 ± 1.15
2013-10-08 Maciejewski et al. 2014 -5.24 ± 5.18
2013-10-03 Maciejewski et al. 2014 -0.93 ± 1.01
2013-09-20 Turner et al. 2016 0.85 ± 3.89
2013-09-07 Maciejewski et al. 2014 -1.26 ± 4.9
2010-11-29 Granata et al. 2014 -0.78 ± 0.27
2010-10-17 Maciejewski et al. 2014 0.07 ± 0.98
2009-11-21 Maciejewski et al. 2014 1.7 ± 1.87
2009-09-29 Maciejewski et al. 2014 -3.36 ± 2.88
2009-08-02 Maciejewski et al. 2014 -1.52 ± 1.87
2008-12-21 Maciejewski et al. 2014 -0.71 ± 3.31
2008-09-27 Maciejewski et al. 2014 -0.14 ± 1.44
2007-09-10 Maciejewski et al. 2014 -3.71 ± 4.03
2006-10-04 Shporer et al. 2007 2.22 ± 0.86
2006-10-04 Shporer et al. 2007 1.65 ± 0.72
2006-10-04 Shporer et al. 2007 -0.23 ± 0.72
2006-09-27 Charbonneau et al. 2007 0.32 ± 0.65
2006-06-26 Collier Cameron et al. 2007 0.74 ± 1.44
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