exoclock

WASP-77Ab (LOW)

Discovered by: Maxted et al. 2013

The Star
Simbad
GAIA
2MASS		 BD-07 436
DR2 5178405479960844160
J02283722-0703384
RA 02:28:37.226 DEC -07:03:38.39
Parallax
9.482 mas		 P.M. RA
93.889 mas/y		 P.M. DEC
-1.567 mas/y
MagV
10.12		 MagR
10.23		 MagI*
9.344		 MagJ
8.766		 MagH
8.374		 MagK
8.405
MagG
10.097		 MagGBP
10.485		 MagGRP
9.586
*Calculated from GAIA magnitudes.

Ephemeris - Verified True
Kokori et al. 2025
Mid-time
2458744.19174 ± 4.9e-05 BJDTDB
Period
1.360028897 ± 9.4e-08 days
Transit Parameters
Maxted et al. 2013
Rp/Rs
0.1301 ± 0.0007		 a/Rs**
5.41 +0.04 -0.04
 i
89.4 +0.4 -0.7 deg
e
-		 ω
- deg
DepthR*
22.93 mmag		 Duration*
2.18 hours
*Calculated from the other parameters, using PyLightcurve.
**Adjusted based on the space observations.

Limb Darkening Parameters
Maxted et al. 2013
Teff
5500.0 +80.0 -80.0 K
 Log(g)
4.33 +0.08 -0.08 cm/s2
 Fe/H
0.0 +0.11 -0.11 dex
ExoClock Status
Observing Priority LOW
Minimum aperture 5.0"
Total Observations (Recent) 88 (4)
O-C 0.45 ± 0.24 minutes
ExoClock Observations (Recent) 53 (4)
Space Observations (Recent) 29 (0)
ETD Observations (Recent) 0 (0)
Literature Mid-times (Recent) 6 (0)
Kepler Rp/Rs -
TESS Rp/Rs 0.12807 ± 0.00013

WASP-77Ab


ExoClock Observations
Planet
Observation Date		 Observer
Observatory		 Telescope
Camera / Filter / Exp [s]		 O-C
minutes
WASP-77Ab (LOW)
2025-11-01		Ana Atanasova
ANI		skywathcher
zwo asi 585 mm pro / V / 20.0		0.83 ± 0.6
WASP-77Ab (LOW)
2025-10-05		Yen-Hsing Lin
Starry House Observatory		Mewlon 300 CRS
ASI 6200MM Pro / Lum / 30.0		0.55 ± 0.42
WASP-77Ab (LOW)
2025-09-18		Yves Jongen
Rasteau Observatory		Plane Wave CDK 17"
SBIG STXL 11002 / R / 60.0		1.09 ± 0.89
WASP-77Ab (LOW)
2025-09-18		Miguel Ángel Álava Amat
Sarriguren		Meade SC 8"
Asi 1600 MM / rpr / 180.0		-1.6 ± 0.82
WASP-77Ab (LOW)
2024-12-26		Giancarlo Madiai
GMAD48		C8
ATR294 / I / 60.0		5.49 ± 1.87
WASP-77Ab (LOW)
2024-12-26		Francesco Scaggiante
Gruppo Astrofili Salese "GALILEO GALILEI"		NEWTON 410/1710
Player One Astronomy Poseidon-M Pro (IMX571) / rpr / 20.0		3.2 ± 1.34
WASP-77Ab (LOW)
2024-12-26		Jacques Michelet
Claix		GSO Ritchey-Chrétien
Poseidon-M Pro / rpr / 120.0		0.44 ± 0.95
WASP-77Ab (LOW)
2024-12-26		Pedro Gómez-Alvarez
Carmina Observatory		Esprit120
QSI632 / Clear / 30.0		-0.41 ± 1.58
WASP-77Ab (LOW)
2024-12-07		Salvador Miquel Romero
Vedat Observatory		Meade SN10 F/4.1
SBIG ST8XME / Lum / 80.0		1.32 ± 1.87
WASP-77Ab (LOW)
2024-11-26		Florence Libotte
IAC 80		IAC 80 equatorial german mount
Camelot2 / R / 40.0		0.36 ± 1.44
WASP-77Ab (LOW)
2024-11-22		Claudio Lopresti
Claudio Lopresti		Mak-Newton
CCD Sbig ST10xme / I / 240.0		-0.08 ± 0.79
WASP-77Ab (LOW)
2024-11-11		Deborah Smith
Complejo Astronomico Los Coloraos, Gorafe		C9.25
QHY9 / R / 60.0		1.68 ± 2.16
WASP-77Ab (LOW)
2024-11-11		Sonia J Rubie
Putlands Observatory		Meade LX200 Classic
SBIG ST8-XME / R / 180.0		-0.87 ± 1.17
WASP-77Ab (LOW)
2024-08-25		Paolo Arcangelo Matassa
P:M.P.H.R. Deep Sky (K81)		Ritchey Chretien 40cm-F5.3
CCD ICX453AQ / Lum / 30.0		-0.85 ± 1.4
WASP-77Ab (LOW)
2023-12-29		Vikrant Kumar Agnihotri
Cepheid Observatory India		GSO Ritchey–Chrétien
Atik383L+ mono / Lum / 120.0		2.39 ± 0.65
WASP-77Ab (LOW)
2023-12-18		Miguel Ángel Álava Amat
Sarriguren		Meade SC 8"
Asi 1600 MM / rpr / 180.0		1.55 ± 1.15
WASP-77Ab (LOW)
2023-12-01		Charles Miller
Miller Observatory		Meade 12" LX850
QHY268M / R / 32.0		-0.42 ± 0.89
WASP-77Ab (LOW)
2023-11-29		Anis Ben Lassoued
Sousse Observatory		NEWTON SKY WATCHER
ASI 533 MM / R / 75.0		2.83 ± 1.73
WASP-77Ab (LOW)
2023-11-18		Anaël Wünsche
Observatoire des Baronnies Provençales		CDK Planewave 2
ZWO ASI6200 / R / 120.0		-1.14 ± 1.34
WASP-77Ab (LOW)
2023-11-18		Xavier Bros
Anysllum		Newton Orion Optics 14" f4.6
ASI2600MM Pro / R / 60.0		-4.56 ± 0.85
WASP-77Ab (LOW)
2023-10-13		Mercedes Correa
Teide Observatory		IAC80
Camelot2 / R / 30.0		-1.94 ± 0.68
WASP-77Ab (LOW)
2022-11-26		James Eke
Private		William Optic Z61
ZWO ASI1600MM / Lum / 35.0		1.25 ± 0.95
WASP-77Ab (LOW)
2022-11-09		Miguel Ángel Álava Amat
Sarriguren		Meade SC 8"
Asi 1600 MM / Lum / 180.0		0.97 ± 1.15
WASP-77Ab (LOW)
2022-10-25		Bernhard Wenzel
Vienna		Newton A=30 cm / F=1,2 m
DSLR Canon 200 D - 14 Bit / Lum / 100.0		-1.93 ± 1.73
WASP-77Ab (LOW)
2022-10-19		Mercedes Correa
Teide Observatory		IAC80
Camelot2 / R / 60.0		0.6 ± 0.62
WASP-77Ab (LOW)
2022-09-28		Po-Jian Chiu
zhshs obs		Takahashi FS-152
ZWO ASI6200MM / Lum / 60.0		-4.21 ± 0.95
WASP-77Ab (LOW)
2022-09-19		Leandro de Almeida
Observatório do Pico dos Dias		0.6m Boller & Chivens f/13.49
Andor Ikon 14912 CCD / I / 10.0		-1.68 ± 0.35
WASP-77Ab (LOW)
2022-01-20		Andre Kovacs
MicroObservatory Cecillia		152mm Maksutov
Kodak KAF-1402ME / Clear / 60.0		-3.05 ± 3.6
WASP-77Ab (LOW)
2022-01-18		Paolo Arcangelo Matassa
P:M.P.H.R. Deep Sky (K81)		Ritchey Chretien 40cm-F5.3
CCD ICX453AQ / Lum / 60.0		2.55 ± 1.2
WASP-77Ab (LOW)
2022-01-18		Bernhard Wenzel
Vienna		Newton A=30 cm / F=1,2 m
DSLR Canon 200 D - 14 Bit / Lum / 45.0		0.16 ± 1.02
WASP-77Ab (LOW)
2022-01-05		Andre Kovacs
MicroObservatory Cecillia		152mm Maksutov
Kodak KAF-1402ME / Clear / 60.0		-1.58 ± 5.47
WASP-77Ab (LOW)
2021-12-19		Paolo Arcangelo Matassa
P:M.P.H.R. Deep Sky (K81)		Ritchey Chretien 40cm-F5.3
CCD ICX453AQ / Lum / 40.0		2.95 ± 1.87
WASP-77Ab (LOW)
2021-11-04		Dominique DANIEL
La Montjoie		Celestron CGX C8 XLT
Camera CMOS ZWO ASI294MC pro (color) / Clear / 77.0		5.76 ± 2.16
WASP-77Ab (LOW)
2021-10-06		Aziz Ettahar Kaeouach
High Atlas Observatory		Celestron C11 hd
Zwo asi 294 mm pro / R / 60.0		-1.73 ± 1.25
WASP-77Ab (LOW)
2021-09-29		Andre Kovacs
MicroObservatory Cecillia		152mm Maksutov
Kodak KAF-1402ME / Clear / 60.0		-1.47 ± 2.3
WASP-77Ab (LOW)
2021-08-30		Yves Jongen
Deep Sky Chile		Plane Wave CDK 17"
Moravian 4G / R / 60.0		0.6 ± 0.72
WASP-77Ab (LOW)
2020-11-25		Martin Smith
Heathwood Road		Skywatcher 120mm ED Apochromatic
Atik 414 ex / R / 20.0		1.6 ± 2.02
WASP-77Ab (LOW)
2020-11-06		Claudio Lopresti
Claudio Lopresti		Mak-Newton
CCD Sbig ST10xme / I / 240.0		2.19 ± 1.15
WASP-77Ab (LOW)
2020-10-31		Francois Regembal
HRTobs		Astrosib RC360
SBIG STX 16803 / Lum / 60.0		3.11 ± 1.15
WASP-77Ab (LOW)
2020-10-26		Martin Crow
Burnham Observatory		Celestron C9.25
SX694 mono / R / 10.0		-1.51 ± 2.02
WASP-77Ab (LOW)
2020-10-22		Nikolaos Paschalis
Nunki Observatory		Officina Stellare RILA 400
SBIG STXL 11002 / R / 60.0		0.19 ± 2.16
WASP-77Ab (LOW)
2020-10-16		Yves Jongen
Deep Sky Chile		Plane Wave CDK 17"
Moravian 4G / R / 60.0		0.26 ± 1.15
WASP-77Ab (LOW)
2020-10-09		Yves Jongen
Deep Sky Chile		Plane Wave CDK 17"
Moravian 4G / R / 60.0		-1.26 ± 1.01
WASP-77Ab (LOW)
2020-08-06		Yves Jongen
Deep Sky Chile		Plane Wave CDK 17"
Moravian 4G / R / 120.0		0.84 ± 0.72
WASP-77Ab (LOW)
2020-01-07		Martin Fowler
MicroObservatory Cecilia		MicroObservatory robotic telescope
KAF 1402ME / Clear / 60.0		1.71 ± 2.16
WASP-77Ab (LOW)
2020-01-01		Pavel Pintr
Horni Halze		Celestron C9.25 with Hyperstar f2.2
ASI ZWO 1600 MONO / R / 180.0		0.73 ± 1.01
WASP-77Ab (LOW)
2019-12-17		Dimitrios Deligeorgopoulos
Artemis Observatory		GSO RC
Atik 16 HR / R / 60.0		0.03 ± 1.01
WASP-77Ab (LOW)
2019-12-02		Alessandro Nastasi
Galhassin Robotic Telescope 1 (GRT1)		Officina Stellare RiLa 400
FLI ProLine 16803 / R / 40.0		-0.37 ± 0.72
WASP-77Ab (LOW)
2019-11-02		Alessandro Nastasi
Galhassin Robotic Telescope 1 (GRT1)		Officina Stellare RiLa 400
FLI ProLine 16803 / R / 60.0		1.55 ± 1.15
WASP-77Ab (LOW)
2019-02-14		Lionel Rousselot
Private observatory Vierzon		Newton
ZWO 1600 monochrome / Clear / 90.0		3.64 ± 1.3
WASP-77Ab (LOW)
2018-11-08		Lorenzo Betti
Osservatorio Polifunzionale del Chianti		RC-80cm
Moravian G2 - KAF1603ME / AstrodonExoPlanet-BB / 40.0		-2.29 ± 0.43
WASP-77Ab (LOW)
2016-11-09		Marc Deldem
Les Barres Observatory		Celestron C8
SBIG ST8-XME / Clear / 80.0		0.71 ± 1.87
WASP-77Ab (LOW)
2015-12-20		Antonio Marino
UAN c/o INAF-Osservatorio Astronomico di Capodimonte, Naples ITALY		SC11
CCD Atik 314L / Clear / 90.0		6.19 ± 2.59

Space Observations
Planet
Observation Date		 Mission O-C
minutes
WASP-77Ab (LOW)
2020-11-15		TESS0.21 ± 0.22
WASP-77Ab (LOW)
2020-11-13		TESS-0.1 ± 0.24
WASP-77Ab (LOW)
2020-11-12		TESS0.41 ± 0.24
WASP-77Ab (LOW)
2020-11-10		TESS0.29 ± 0.26
WASP-77Ab (LOW)
2020-11-09		TESS-0.09 ± 0.24
WASP-77Ab (LOW)
2020-11-08		TESS0.06 ± 0.22
WASP-77Ab (LOW)
2020-11-06		TESS0.51 ± 0.22
WASP-77Ab (LOW)
2020-11-05		TESS0.11 ± 0.22
WASP-77Ab (LOW)
2020-11-01		TESS-0.28 ± 0.2
WASP-77Ab (LOW)
2020-10-31		TESS-0.2 ± 0.23
WASP-77Ab (LOW)
2020-10-29		TESS0.43 ± 0.26
WASP-77Ab (LOW)
2020-10-28		TESS-0.49 ± 0.23
WASP-77Ab (LOW)
2020-10-26		TESS-0.09 ± 0.22
WASP-77Ab (LOW)
2020-10-25		TESS-0.02 ± 0.22
WASP-77Ab (LOW)
2020-10-24		TESS0.01 ± 0.22
WASP-77Ab (LOW)
2020-10-22		TESS-0.08 ± 0.2
WASP-77Ab (LOW)
2018-11-12		TESS0.13 ± 0.24
WASP-77Ab (LOW)
2018-11-11		TESS0.06 ± 0.23
WASP-77Ab (LOW)
2018-11-10		TESS0.2 ± 0.22
WASP-77Ab (LOW)
2018-11-08		TESS-0.25 ± 0.23
WASP-77Ab (LOW)
2018-11-07		TESS-0.18 ± 0.23
WASP-77Ab (LOW)
2018-11-06		TESS-0.31 ± 0.23
WASP-77Ab (LOW)
2018-11-04		TESS0.11 ± 0.22
WASP-77Ab (LOW)
2018-11-03		TESS0.09 ± 0.24
WASP-77Ab (LOW)
2018-10-26		TESS-0.14 ± 0.22
WASP-77Ab (LOW)
2018-10-24		TESS0.37 ± 0.22
WASP-77Ab (LOW)
2018-10-23		TESS0.11 ± 0.23
WASP-77Ab (LOW)
2018-10-22		TESS0.52 ± 0.22
WASP-77Ab (LOW)
2018-10-20		TESS0.09 ± 0.24

Literature Mid-times
Planet
Observation Date		 Reference O-C
minutes
2016-10-08 Cortés-Zuleta et al. 2020 2.35 ± 2.8
2016-09-27 Cortés-Zuleta et al. 2020 -1.79 ± 4.3
2015-10-04 Cortés-Zuleta et al. 2020 0.2 ± 2.3
2015-09-30 Cortés-Zuleta et al. 2020 2.35 ± 2.5
2012-12-10 Turner et al. 2016 -0.55 ± 0.55
2011-11-04 Maxted et al. 2013 -0.2 ± 0.2
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