exoclock
The Star
Simbad
GAIA
2MASS
BD-20 2976
DR2 5664957444179338240
J09393009-2058568
RA 09:39:30.0860 DEC -20:58:56.877
Parallax
8.73 mas
P.M. RA
-55.082 mas/y
P.M. DEC
10.927 mas/y
MagV
9.35
MagR*
9.051
MagI*
8.714
MagJ
8.35
MagH
8.135
MagK
8.032
MagG
9.257
MagGBP
9.564
MagGRP
8.827
*Calculated from GAIA magnitudes.

Ephemeris - Verified True
Kokori et al. 2025
Mid-time
2459155.85962 ± 0.00021 BJDTDB
Period
5.4435409 ± 1.6e-06 days

Transit Parameters
Hellier et al. 2019
Rp/Rs
0.05301 ± 0.00066
a/Rs
11.3 +0.6 -0.6
i
88.0 +0.7 -0.7 deg
e
-
ω
- deg
DepthR*
3.57 mmag
Duration*
3.6 hours
*Calculated from the other parameters, using PyLightcurve.
**Adjusted based on the space observations.

Limb Darkening Parameters
Hellier et al. 2019
Teff
6050.0 +50.0 -50.0 K
Log(g)
4.34 +0.05 -0.05 cm/s2
Fe/H
0.19 +0.05 -0.05 dex
ExoClock Status
Observing Priority HIGH
Minimum aperture 10.14"
Total Observations (Recent) 12 (0)
O-C -
ExoClock Observations (Recent) 0 (0)
Space Observations (Recent) 11 (0)
ETD Observations (Recent) 0 (0)
Literature Mid-times (Recent) 1 (0)
Kepler Rp/Rs -
TESS Rp/Rs 0.05204 ± 0.00026

WASP-166b


Space Observations

Planet
Observation Date
Mission O-C
minutes
WASP-166b (HIGH)
2023-03-06
TESS-0.12 ± 0.79
WASP-166b (HIGH)
2023-03-01
TESS0.5 ± 0.82
WASP-166b (HIGH)
2023-02-24
TESS-1.38 ± 1.21
WASP-166b (HIGH)
2023-02-18
TESS-0.36 ± 0.81
WASP-166b (HIGH)
2021-03-02
TESS0.84 ± 0.84
WASP-166b (HIGH)
2021-02-19
TESS-0.56 ± 0.81
WASP-166b (HIGH)
2021-02-13
TESS0.16 ± 0.98
WASP-166b (HIGH)
2019-02-26
TESS0.15 ± 0.89
WASP-166b (HIGH)
2019-02-20
TESS4.96 ± 1.44
WASP-166b (HIGH)
2019-02-09
TESS-0.09 ± 0.79
WASP-166b (HIGH)
2019-02-04
TESS-0.74 ± 0.85

Literature Mid-times

Planet
Observation Date
Reference O-C
minutes
2016-10-02 Hellier et al. 2019 -0.74 ± 0.86
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