results

WASP-89 b

Timing Plot

Total Reductions to Date: 5

Date Processed: 09/06/2025 at 07:00:04 (PDT)

Exoplanet Watch Ephemeris

Parameter Value Uncertainty
Orbital Period (Days) 3.35641902785048 7.635800919903902e-07
Ephemeris (BJD_TDB) 2459811.8157030176 0.0007548470588036141
Time saved (hours) -  

Assumed Priors

Parameter Value Uncertainty Units Reference
RA 313.9000261 decimal
DEC -18.9714084 decimal
Host Star Metallicity 0.15 0.14 Kokori et al. 2023
Host Star log(g) 4.515 0.018 Log10(cgs) Kokori et al. 2023
Host Star Radius [R_Sun] 0.88 0.03 Sol Kokori et al. 2023
Host Star Effective Temperature [K] 5130.0 90.0 K Kokori et al. 2023
a/Rs 10.51 0.08 Kokori et al. 2023
eccentricity 0.193 0.009 Kokori et al. 2023
inclination [degrees] 89.4 0.5 deg Kokori et al. 2023
omega [degrees] 28.0 4.0 deg Kokori et al. 2023
orbital period [days] 3.35641798 3.3e-07 day Kokori et al. 2023
Rp 11.66 0.45 R_Earth Bonomo et al. 2017
Rp/Rs 0.1221 0 Hellier et al. 2015
ephemeris [JD] 2456905.15681 0.00012 BJD-TDB Kokori et al. 2023

Previously Published Mid-Transit Times

Value Uncertainty Units Reference
2456207.0215304997 0.00012 BJD-TDB, HJD-UTC Bonomo et al. 2017, Hellier et al. 2015
2456398.33771 0.00012 BJD-TDB Kokori et al. 2022
2456905.15681 0.00012 BJD-TDB Kokori et al. 2023

Observations

Light curve chart for 0009051
Parameter Value Uncertainty
Am1 1.509 0.038
Am2 -0.26 0.1
a/Rs 10.82 0.23
Rp/Rs 0.158 0.057
ephemeris [JD] 2458277.92 0.012
eccentricity 0.193
inclination [degrees] 89.4
omega [degrees] 28.0
orbital period [days] 3.35641798
u0 1.5267001872324883
u1 -2.615818627673733
u2 3.262889883065895
u3 -1.1737713940038028
duration 0.081 0.0098
Not included in ephemeris calculations
Light Curve ( PNG, PDF - high resolution )
Posteriors ( PNG, PDF - high resolution )
Observation Data ( JSON )
Filter Detail Min Max
V Johnson V 502.8 nm 586.8 nm
Organization Observer Code Secondary Observers
AAVSO RNEA (collaborate/publish) MOBS
Light curve chart for 0008195
Parameter Value Uncertainty
Am1 2.179 0.072
Am2 -0.44 0.17
a/Rs 10.9 0.23
Rp/Rs 0.244 0.075
ephemeris [JD] 2458663.899 0.011
eccentricity 0.193
inclination [degrees] 89.4
omega [degrees] 28.0
orbital period [days] 3.35641798
u0 1.5265465299344272
u1 -2.6150309655543027
u2 3.262255533385588
u3 -1.1737710491543165
duration 0.0897 0.0052
Not included in ephemeris calculations
Light Curve ( PNG, PDF - high resolution )
Posteriors ( PNG, PDF - high resolution )
Observation Data ( JSON )
Filter Detail Min Max
V Johnson V 502.8 nm 586.8 nm
Organization Observer Code Secondary Observers
AAVSO MMAMA (collaborate/publish) MOBS
Light curve chart for 0011317
Parameter Value Uncertainty
Am1 2.147 0.058
Am2 -0.43 0.19
a/Rs 10.79 0.23
Rp/Rs 0.244 0.076
ephemeris [JD] 2458663.899 0.011
eccentricity 0.193
inclination [degrees] 89.4
omega [degrees] 28.0
orbital period [days] 3.35641798
u0 1.5270856792058667
u1 -2.616558466383419
u2 3.2638408134517563
u3 -1.1743679776391862
duration 0.0876 0.0045
Not included in ephemeris calculations
Light Curve ( PNG, PDF - high resolution )
Posteriors ( PNG, PDF - high resolution )
Observation Data ( JSON )
Filter Detail Min Max
V Johnson V 502.8 nm 586.8 nm
Organization Observer Code Secondary Observers
AAVSO TRIC (collaborate/publish) MOBS
Light curve chart for 0011587
Parameter Value Uncertainty
Am1 1.176 0.069
Am2 -0.085 0.048
a/Rs 10.75 0.23
Rp/Rs 0.208 0.064
ephemeris [JD] 2459462.727 0.011
eccentricity 0.193
inclination [degrees] 89.4
omega [degrees] 28.0
orbital period [days] 3.35641798
u0 1.52620297255913
u1 -2.615016182014554
u2 3.263035618517241
u3 -1.1742223604387974
duration 0.1069 0.0065
Not included in ephemeris calculations
Light Curve ( PNG, PDF - high resolution )
Posteriors ( PNG, PDF - high resolution )
Observation Data ( JSON )
Filter Detail Min Max
V Johnson V 502.8 nm 586.8 nm
Organization Observer Code Secondary Observers
AAVSO PJOO (collaborate/publish) MOBS
Light curve chart for 0001848
Parameter Value Uncertainty
Am1 0.989 0.013
Am2 0.0049 0.0045
a/Rs 10.49 0.23
Rp/Rs 0.1252 0.0096
ephemeris [JD] 2459811.8135 0.0024
eccentricity 0.193
inclination [degrees] 89.4
omega [degrees] 28.0
orbital period [days] 3.35641798
u0 1.5266999955131049
u1 -2.61587062137067
u2 3.2636586425681147
u3 -1.174487968078246
duration 0.1027 0.0024
Included in ephemeris calculations
Light Curve ( PNG, PDF - high resolution )
Posteriors ( PNG, PDF - high resolution )
Observation Data ( JSON )
Filter Detail Min Max
V Johnson V 502.8 nm 586.8 nm
Organization Observer Code Secondary Observers
AAVSO CCHD (collaborate/publish)