exoclock

WASP-78b (HIGH)

Discovered by: Smalley et al. 2012

The Star
Simbad
GAIA
2MASS		 WASP-78
DR2 5089851638095503616
J04150149-2206591
RA 04:15:01.5043 DEC -22:06:59.103
Parallax
1.297 mas		 P.M. RA
-0.463 mas/y		 P.M. DEC
6.424 mas/y
MagV
11.96		 MagR
12.43		 MagI
11.65		 MagJ
11.286		 MagH
11.084		 MagK
11.008
MagG
12.188		 MagGBP
12.451		 MagGRP
11.768
*Calculated from GAIA magnitudes.

Ephemeris - Verified True
Kokori et al. 2025
Mid-time
2458151.07717 ± 0.0002 BJDTDB
Period
2.17518543 ± 3.1e-07 days
Transit Parameters
Smalley et al. 2012
Rp/Rs
0.0794 ± 0.0013		 a/Rs
3.52 +0.078 -0.078
 i
83.2 +2.3 -1.6 deg
e
-		 ω
- deg
DepthR*
8.0 mmag		 Duration*
4.8 hours
*Calculated from the other parameters, using PyLightcurve.
**Adjusted based on the space observations.

Limb Darkening Parameters
Smalley et al. 2012
Teff
6100.0 +150.0 -150.0 K
 Log(g)
3.88 +0.04 -0.04 cm/s2
 Fe/H
-0.35 +0.14 -0.14 dex
ExoClock Status
Observing Priority HIGH
Minimum aperture 9.65"
Total Observations (Recent) 41 (0)
O-C -0.78 ± 2.45 minutes
ExoClock Observations (Recent) 7 (0)
Space Observations (Recent) 32 (0)
ETD Observations (Recent) 0 (0)
Literature Mid-times (Recent) 2 (0)
Kepler Rp/Rs -
TESS Rp/Rs 0.08605 ± 0.0004

WASP-78b


ExoClock Observations
Planet
Observation Date		 Observer
Observatory		 Telescope
Camera / Filter / Exp [s]		 O-C
minutes
WASP-78b (HIGH)
2025-01-03		Yves Jongen
Deep Sky Chile		Plane Wave CDK 17"
Moravian 4G / R / 180.0		-0.78 ± 2.45
WASP-78b (HIGH)
2023-12-04		Yves Jongen
Deep Sky Chile		Plane Wave CDK 17"
Moravian 4G / Lum / 90.0		2.03 ± 2.45
WASP-78b (HIGH)
2023-11-21		Yves Jongen
Deep Sky Chile		Plane Wave CDK 17"
Moravian 4G / Lum / 90.0		2.77 ± 1.44
WASP-78b (HIGH)
2023-01-14		Yves Jongen
Deep Sky Chile		Plane Wave CDK 17"
Moravian 4G / Lum / 90.0		2.79 ± 1.73
WASP-78b (HIGH)
2020-12-05		Yves Jongen
Deep Sky Chile		Plane Wave CDK 17"
Moravian 4G / R / 120.0		1.56 ± 2.3
WASP-78b (HIGH)
2020-11-24		Yves Jongen
Deep Sky Chile		Plane Wave CDK 17"
Moravian 4G / R / 120.0		-0.57 ± 3.6
WASP-78b (HIGH)
2020-11-11		Yves Jongen
Deep Sky Chile		Plane Wave CDK 17"
Moravian 4G / Lum / 120.0		-0.55 ± 2.3

Space Observations
Planet
Observation Date		 Mission O-C
minutes
WASP-78b (HIGH)
2020-12-16		TESS-3.09 ± 2.3
WASP-78b (HIGH)
2020-12-13		TESS-0.95 ± 2.59
WASP-78b (HIGH)
2020-12-11		TESS2.91 ± 2.3
WASP-78b (HIGH)
2020-12-09		TESS2.17 ± 2.59
WASP-78b (HIGH)
2020-12-07		TESS-2.31 ± 1.73
WASP-78b (HIGH)
2020-12-05		TESS-2.48 ± 2.16
WASP-78b (HIGH)
2020-11-30		TESS-1.22 ± 2.3
WASP-78b (HIGH)
2020-11-28		TESS1.06 ± 2.02
WASP-78b (HIGH)
2020-11-26		TESS1.76 ± 2.3
WASP-78b (HIGH)
2020-11-24		TESS1.59 ± 2.3
WASP-78b (HIGH)
2020-11-22		TESS-2.03 ± 1.87
WASP-78b (HIGH)
2020-11-15		TESS-0.22 ± 3.17
WASP-78b (HIGH)
2020-11-13		TESS-2.25 ± 2.16
WASP-78b (HIGH)
2020-11-11		TESS-2.13 ± 2.45
WASP-78b (HIGH)
2020-11-09		TESS1.3 ± 2.45
WASP-78b (HIGH)
2020-11-06		TESS1.28 ± 1.87
WASP-78b (HIGH)
2020-11-02		TESS-2.5 ± 2.88
WASP-78b (HIGH)
2020-10-31		TESS1.22 ± 2.16
WASP-78b (HIGH)
2020-10-29		TESS-0.1 ± 2.02
WASP-78b (HIGH)
2020-10-26		TESS-3.0 ± 2.16
WASP-78b (HIGH)
2020-10-24		TESS-1.58 ± 2.16
WASP-78b (HIGH)
2020-10-22		TESS-3.9 ± 2.16
WASP-78b (HIGH)
2018-12-09		TESS1.46 ± 2.59
WASP-78b (HIGH)
2018-12-07		TESS3.6 ± 2.16
WASP-78b (HIGH)
2018-12-05		TESS0.12 ± 1.73
WASP-78b (HIGH)
2018-12-03		TESS1.54 ± 2.02
WASP-78b (HIGH)
2018-11-30		TESS-1.36 ± 1.87
WASP-78b (HIGH)
2018-11-26		TESS-1.26 ± 2.16
WASP-78b (HIGH)
2018-11-24		TESS-0.13 ± 2.02
WASP-78b (HIGH)
2018-11-22		TESS-1.44 ± 1.87
WASP-78b (HIGH)
2018-11-20		TESS-1.47 ± 2.02
WASP-78b (HIGH)
2018-11-17		TESS-1.2 ± 1.87

Literature Mid-times
Planet
Observation Date		 Reference O-C
minutes
2012-07-30 Brown et al. 2017 -0.5 ± 0.72
2011-11-16 Smalley et al. 2012 1.11 ± 0.76
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