exoclock

WASP-57b (LOW)

Discovered by: Faedi et al. 2013

The Star
Simbad
GAIA
2MASS		 WASP-57
DR2 6340377202215639936
J14551682-0203275
RA 14:55:16.8228 DEC -02:03:27.599
Parallax
2.483 mas		 P.M. RA
-27.064 mas/y		 P.M. DEC
-4.687 mas/y
MagV
13.04		 MagR
12.9		 MagI
12.243		 MagJ
11.625		 MagH
11.292		 MagK
11.244
MagG
12.729		 MagGBP
13.094		 MagGRP
12.215
*Calculated from GAIA magnitudes.

Ephemeris - Verified True
Kokori et al. 2025
Mid-time
2456524.131678 ± 9.8e-05 BJDTDB
Period
2.83891814 ± 3.2e-07 days
Transit Parameters
Southworth et al. 2015
Rp/Rs
0.1182 ± 0.0013		 a/Rs
8.75 +0.23 -0.22
 i
86.0 +0.3 -0.3 deg
e
-		 ω
- deg
DepthR*
16.71 mmag		 Duration*
2.33 hours
*Calculated from the other parameters, using PyLightcurve.
**Adjusted based on the space observations.

Limb Darkening Parameters
Faedi et al. 2013
Teff
5600.0 +100.0 -100.0 K
 Log(g)
4.57 +0.01 -0.01 cm/s2
 Fe/H
-0.25 +0.1 -0.1 dex
ExoClock Status
Observing Priority LOW
Minimum aperture 7.63"
Total Observations (Recent) 48 (3)
O-C -0.78 ± 0.64 minutes
ExoClock Observations (Recent) 27 (3)
Space Observations (Recent) 3 (0)
ETD Observations (Recent) 0 (0)
Literature Mid-times (Recent) 18 (0)
Kepler Rp/Rs -
TESS Rp/Rs 0.1173 ± 0.0021

WASP-57b


ExoClock Observations
Planet
Observation Date		 Observer
Observatory		 Telescope
Camera / Filter / Exp [s]		 O-C
minutes
WASP-57b (LOW)
2026-04-26		Hao-Yuan Duan
Lulin Observatory		GSO RC12
player one / I / 120.0		3.91 ± 2.59
WASP-57b (LOW)
2026-04-21		Matthieu Bachschmidt
Gonachon		Celestron C11
SBIG ST8XME / AstrodonExoPlanet-BB / 120.0		0.51 ± 1.44
WASP-57b (LOW)
2025-05-23		Tommaso Dittadi
TD-TRO		Ritchey-Chretien
Moravian G2-1600 / R / 120.0		-1.19 ± 1.44
WASP-57b (LOW)
2025-05-04		Adrian Jones
Private Observatory (I64)		Meade ACF 30cm
QSI 583 / R / 200.0		-0.14 ± 3.17
WASP-57b (LOW)
2025-04-11		Darryl Madison
Ajijic Observatory		Celestron CPC 800 Edge HD
ZWO2400MC / Clear / 90.0		0.36 ± 2.74
WASP-57b (LOW)
2025-04-11		Charles Miller
Miller Observatory		Meade 12" LX850
QHY268M / R / 90.0		-2.23 ± 2.3
WASP-57b (LOW)
2025-03-28		Deborah Smith
El Olivar, Gergal, Spain		TS-Optics UNC Newtonian 12"
ASI533MM / R / 210.0		0.78 ± 2.02
WASP-57b (LOW)
2025-03-28		Adrian Schoner
TURMX Observatory		CFF Telescopes 160mm APO
ZWO ASI6200MM Pro / Lum / 120.0		-0.81 ± 1.58
WASP-57b (LOW)
2024-05-17		Ian Sharp
Ham Observatory		Celestron C9.25 Edge HD
Starlight Xpress Trius Pro SX694 / R / 120.0		-2.08 ± 2.74
WASP-57b (LOW)
2024-05-17		Deborah Smith
El Olivar, Gergal, Spain		Newtonian 8"
ASI2600MM / R / 120.0		-9.28 ± 2.59
WASP-57b (LOW)
2024-03-07		Carmelo Falco
Racalmuto - G. Lemaitre Observatory		Ritchey-Chrétien 16” F/8 + RM500 Mount
Andor Aspen CG16M / Lum / 60.0		4.33 ± 3.89
WASP-57b (LOW)
2023-07-04		Rodrigo Boufleur
Pico dos Dias		Boller & Chivens
Andor iKon-L CCD / R / 120.0		1.6 ± 1.05
WASP-57b (LOW)
2023-07-04		Yves Jongen
Deep Sky Chile		Plane Wave CDK 17"
Moravian 4G / Lum / 120.0		-0.22 ± 1.15
WASP-57b (LOW)
2023-06-14		Jean-Pascal Vignes
Deep Sky Chile		PlaneWave CDK 17"
QHYCCD 600 M / Lum / 120.0		1.74 ± 1.41
WASP-57b (LOW)
2023-03-01		Leon Bewersdorff
Observatory Kipshoven (BLEW)		GSO Ritchey-Chrétien
QHY268M-PH / V / 180.0		3.86 ± 5.9
WASP-57b (LOW)
2023-03-01		David Quiles
David Quiles Observatory		Celestron EDGEHD 800
Omegon veTEC 571M / R / 120.0		-0.03 ± 2.3
WASP-57b (LOW)
2023-03-01		Adam Popowicz
Otivar dome2		Newton 12" ASA
ASI ZWO 1600MM / R / 202.0		-1.47 ± 1.73
WASP-57b (LOW)
2022-04-08		Taewoo Kim
Deokheung Optical Astronomy Observatory		NYSC 1m Telescope
FLI PL-16803 or PI SOPHIA-2048B / R / 120.0		0.1 ± 0.72
WASP-57b (LOW)
2022-04-02		Marc Serrau
A77 Dauban		Celestron 11
ST8-XME / Clear / 120.0		-7.05 ± 4.32
WASP-57b (LOW)
2022-03-14		Paolo Arcangelo Matassa
P:M.P.H.R. Deep Sky (K81)		Ritchey Chretien 40cm-F5.3
CCD ICX453AQ / Lum / 90.0		0.91 ± 2.45
WASP-57b (LOW)
2021-04-21		Billy Edwards
Sliding Spring Observatory		LCO Meade
SBIG STX6303 / rpr / 90.288		-3.86 ± 2.16
WASP-57b (LOW)
2021-04-13		Yves Jongen
Deep Sky Chile		Plane Wave CDK 17"
Moravian 4G / Lum / 120.0		-0.04 ± 1.01
WASP-57b (LOW)
2021-03-27		Adrian Jones
Private Observatory (I64)		Meade ACF 30cm
QSI 583 / R / 200.0		0.98 ± 2.45
WASP-57b (LOW)
2021-03-10		Yves Jongen
Rasteau Observatory		Plane Wave CDK 17"
SBIG STXL 11002 / Lum / 120.0		1.43 ± 1.58
WASP-57b (LOW)
2020-05-10		Yves Jongen
Deep Sky Chile		Plane Wave CDK 17"
Moravian 4G / Clear / 120.0		-0.53 ± 1.15
WASP-57b (LOW)
2020-03-23		Manfred Raetz
privat observatory Herges-Hallenberg		SCT 280 /1790 (Celestron C11 with reducer)
Moravian Instruments G2-1600 / Clear / 120.0		-2.39 ± 1.3
WASP-57b (LOW)
2015-05-28		Anaël Wünsche
Observatoire des Baronnies Provençales		Astelco
FLIPL230 / V / 120.0		-2.04 ± 1.01

Space Observations
Planet
Observation Date		 Mission O-C
minutes
WASP-57b (LOW)
2022-05-15		TESS-1.1 ± 1.58
WASP-57b (LOW)
2022-05-04		TESS-1.91 ± 1.34
WASP-57b (LOW)
2022-05-01		TESS1.47 ± 1.58

Literature Mid-times
Planet
Observation Date		 Reference O-C
minutes
2014-06-25 Southworth et al. 2015 1.22 ± 0.56
2014-06-25 Southworth et al. 2015 0.96 ± 0.49
2014-06-25 Southworth et al. 2015 0.67 ± 0.24
2014-06-25 Southworth et al. 2015 0.19 ± 0.32
2014-06-25 Southworth et al. 2015 -1.15 ± 0.3
2014-06-10 Southworth et al. 2015 2.64 ± 1.44
2014-05-19 Southworth et al. 2015 -0.4 ± 0.27
2012-05-11 Southworth et al. 2015 0.7 ± 0.33
2012-05-11 Southworth et al. 2015 0.04 ± 0.6
2012-05-11 Southworth et al. 2015 -0.28 ± 0.56
2012-05-11 Southworth et al. 2015 -0.84 ± 2.06
2012-04-01 Southworth et al. 2015 0.42 ± 0.24
2012-04-01 Southworth et al. 2015 -1.58 ± 0.6
2012-03-15 Southworth et al. 2015 -1.79 ± 0.5
2011-06-11 Southworth et al. 2015 0.66 ± 0.36
2011-06-11 Southworth et al. 2015 -1.01 ± 0.4
2011-06-05 Faedi et al. 2013 -0.04 ± 0.29
2011-05-05 Southworth et al. 2015 0.05 ± 0.79
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