results

WASP-118 b

Total Reductions to Date: 11

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

Exoplanet Watch Ephemeris

Parameter	Value	Uncertainty
Orbital Period (Days)	4.046050114075299	3.840677492912671e-07
Ephemeris (BJD_TDB)	2460226.9575544437	0.00026429425381175003
Time saved (hours)	0.0001

Assumed Priors

Parameter	Value	Uncertainty	Units	Reference
RA	19.5505861		decimal
DEC	2.7027847		decimal
Host Star Metallicity	0.16	0.1		Kokori et al. 2023
Host Star log(g)	4.1	0.012	Log10(cgs)	Kokori et al. 2023
Host Star Radius [R_Sun]	1.696	0.029	Sol	Kokori et al. 2023
Host Star Effective Temperature [K]	6410.0	125.0	K	Kokori et al. 2023
a/R_s	6.707	0.015		Kokori et al. 2023
eccentricity	0.0			Močnik et al. 2017
inclination [degrees]	88.24	0.14	deg	Kokori et al. 2023
omega [degrees]	0.0		deg	Hay et al. 2016
orbital period [days]	4.04605063	9.4e-07	day	Kokori et al. 2023
R_p	14.94	0.27	R_Earth	Gajdoš et al. 2019
R_p/R_s	0.0806	0		Gajdoš et al. 2019
ephemeris [JD]	2457888.34009	0.00021	BJD-TDB	Kokori et al. 2023

Previously Published Mid-Transit Times

Value	Uncertainty	Units	Reference
2456787.81336	0.00065	BJD, HJD	Gajdoš et al. 2019, Hay et al. 2016
2457394.72301	0.000193	BJD	Petigura et al. 2018
2457423.044825	2e-05	BJD	Močnik et al. 2017
2457888.34009	0.00021	BJD-TDB	Kokori et al. 2023
2459450.11564	0.00026	BJD-TDB	Ivshina & Winn 2022
2460226.955884	0.0024571	BJD	ExoFOP-TESS TOI

Observations

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Parameter	Value	Uncertainty
Am1	1.331	0.018
Am2	-0.223	0.013
a/R_s	6.646	0.042
R_p/R_s	0.1612	0.0072
ephemeris [JD]	2459490.5969	0.0015
eccentricity	0.0
inclination [degrees]	88.24
omega [degrees]	0.0
orbital period [days]	4.04605063
u0	2.269546848769875
u1	-4.008844142094466
u2	4.284452919920472
u3	-1.5451555627525577
duration	0.2164	0.0019

Included in ephemeris calculations

Light Curve ( PNG, PDF - high resolution )
Posteriors ( PNG, PDF - high resolution )
Observation Data ( JSON )

Filter	Detail	Min	Max
NA	Custom	552.0 nm	691.0 nm

Organization	Observer Code	Secondary Observers
AAVSO	LGEC (collaborate/publish)

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Parameter	Value	Uncertainty
Am1	1.0032	0.0019
Am2	-0.0022	0.0016
a/R_s	6.634	0.043
R_p/R_s	0.0836	0.0061
ephemeris [JD]	2460222.9091	0.0036
eccentricity	0.0
inclination [degrees]	88.24
omega [degrees]	0.0
orbital period [days]	4.04605063
u0	2.3444175541108345
u1	-4.14647326651814
u2	4.363010285586951
u3	-1.5609545081657252
duration	0.2076	0.0019

Included in ephemeris calculations

Light Curve ( PNG, PDF - high resolution )
Posteriors ( PNG, PDF - high resolution )
Observation Data ( JSON )

Filter	Detail	Min	Max
R	Cousins R	561.7 nm	719.7 nm

Organization	Observer Code	Secondary Observers
AAVSO	LPAC (collaborate/publish)

Light curve chart for 4b229fd6464501a73e828904688d3333

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Parameter	Value	Uncertainty
Am1	1.0002	0.0013
Am2	0
a/R_s	6.712	0.041
R_p/R_s	0.08213	0.00096
ephemeris [JD]	2459494.62243	0.00093
eccentricity	0.0
inclination [degrees]	88.24
omega [degrees]	0.0
orbital period [days]	4.04605063
u0	2.888387970108479
u1	-5.1984965509720595
u2	5.034884712507911
u3	-1.7247760566187016
duration	0.205	0.0014

Included in ephemeris calculations

Light Curve ( PNG, PDF - high resolution )
Posteriors ( PNG, PDF - high resolution )
Observation Data ( JSON )

Filter	Detail	Min	Max
I	Cousins I	721.0 nm	875.0 nm

Organization	Observer Code	Secondary Observers
EPW	TESS (collaborate/publish)

Light curve chart for 4c7aae401eb36b8f33838684c2fc3a5d

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Parameter	Value	Uncertainty
Am1	1.0002	0.0014
Am2	0
a/R_s	6.633	0.035
R_p/R_s	0.0814	0.0011
ephemeris [JD]	2459470.34635	0.00095
eccentricity	0.0
inclination [degrees]	88.24
omega [degrees]	0.0
orbital period [days]	4.04605063
u0	2.8876431934941706
u1	-5.196763100813606
u2	5.0334217312410585
u3	-1.724301748917795
duration	0.2075	0.0012

Included in ephemeris calculations

Light Curve ( PNG, PDF - high resolution )
Posteriors ( PNG, PDF - high resolution )
Observation Data ( JSON )

Filter	Detail	Min	Max
I	Cousins I	721.0 nm	875.0 nm

Organization	Observer Code	Secondary Observers
EPW	TESS (collaborate/publish)

Light curve chart for 418868662975749bc684e88865d1b092

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Parameter	Value	Uncertainty
Am1	1.0	0.0013
Am2	0
a/R_s	6.632	0.029
R_p/R_s	0.08044	0.00096
ephemeris [JD]	2459478.43945	0.00093
eccentricity	0.0
inclination [degrees]	88.24
omega [degrees]	0.0
orbital period [days]	4.04605063
u0	2.8885852178439912
u1	-5.199485913346478
u2	5.036352463772529
u3	-1.7254516932225425
duration	0.2075	0.0011

Included in ephemeris calculations

Light Curve ( PNG, PDF - high resolution )
Posteriors ( PNG, PDF - high resolution )
Observation Data ( JSON )

Filter	Detail	Min	Max
I	Cousins I	721.0 nm	875.0 nm

Organization	Observer Code	Secondary Observers
EPW	TESS (collaborate/publish)

Light curve chart for 7787a000fdea90c9cfba8750ca7e48dd

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Parameter	Value	Uncertainty
Am1	1.0002	0.0014
Am2	0
a/R_s	6.646	0.037
R_p/R_s	0.08286	0.00099
ephemeris [JD]	2459490.57509	0.00094
eccentricity	0.0
inclination [degrees]	88.24
omega [degrees]	0.0
orbital period [days]	4.04605063
u0	2.8884299989829474
u1	-5.198938003711988
u2	5.035665260920915
u3	-1.7251571811546142
duration	0.2075	0.0014

Included in ephemeris calculations

Light Curve ( PNG, PDF - high resolution )
Posteriors ( PNG, PDF - high resolution )
Observation Data ( JSON )

Filter	Detail	Min	Max
I	Cousins I	721.0 nm	875.0 nm

Organization	Observer Code	Secondary Observers
EPW	TESS (collaborate/publish)

Light curve chart for edc69ea56d6d8d9a968f04c27be9f4de

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Parameter	Value	Uncertainty
Am1	1.0001	0.0014
Am2	0
a/R_s	6.699	0.041
R_p/R_s	0.08242	0.00097
ephemeris [JD]	2459450.1161	0.001
eccentricity	0.0
inclination [degrees]	88.24
omega [degrees]	0.0
orbital period [days]	4.04605063
u0	2.888307772303541
u1	-5.198753668757388
u2	5.035629892590833
u3	-1.7251839211002529
duration	0.2053	0.0014

Included in ephemeris calculations

Light Curve ( PNG, PDF - high resolution )
Posteriors ( PNG, PDF - high resolution )
Observation Data ( JSON )

Filter	Detail	Min	Max
I	Cousins I	721.0 nm	875.0 nm

Organization	Observer Code	Secondary Observers
EPW	TESS (collaborate/publish)

Light curve chart for f6e9343e17c92022db2143dfeb9636d5

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Parameter	Value	Uncertainty
Am1	1.0	0.0014
Am2	0
a/R_s	6.689	0.039
R_p/R_s	0.081	0.001
ephemeris [JD]	2459462.2537	0.00093
eccentricity	0.0
inclination [degrees]	88.24
omega [degrees]	0.0
orbital period [days]	4.04605063
u0	2.888387301114779
u1	-5.198976585194478
u2	5.035855595915834
u3	-1.7252662367960392
duration	0.2053	0.0014

Included in ephemeris calculations

Light Curve ( PNG, PDF - high resolution )
Posteriors ( PNG, PDF - high resolution )
Observation Data ( JSON )

Filter	Detail	Min	Max
I	Cousins I	721.0 nm	875.0 nm

Organization	Observer Code	Secondary Observers
EPW	TESS (collaborate/publish)

Light curve chart for 60d7d4fd55b6f5b869775df7ce8ec03a

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Parameter	Value	Uncertainty
Am1	1.0	0.0014
Am2	0
a/R_s	6.709	0.04
R_p/R_s	0.07794	0.00099
ephemeris [JD]	2459454.1613	0.001
eccentricity	0.0
inclination [degrees]	88.24
omega [degrees]	0.0
orbital period [days]	4.04605063
u0	2.8881043810894473
u1	-5.198356916087919
u2	5.03537129016202
u3	-1.7251186801306693
duration	0.2042	0.0013

Included in ephemeris calculations

Light Curve ( PNG, PDF - high resolution )
Posteriors ( PNG, PDF - high resolution )
Observation Data ( JSON )

Filter	Detail	Min	Max
I	Cousins I	721.0 nm	875.0 nm

Organization	Observer Code	Secondary Observers
EPW	TESS (collaborate/publish)

Light curve chart for 6ba231a5cc02b8ebcd562e0475d7f2b6

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Parameter	Value	Uncertainty
Am1	0.9998	0.0013
Am2	0
a/R_s	6.632	0.033
R_p/R_s	0.08212	0.00093
ephemeris [JD]	2459466.2986	0.001
eccentricity	0.0
inclination [degrees]	88.24
omega [degrees]	0.0
orbital period [days]	4.04605063
u0	2.8884937269692545
u1	-5.199653053235662
u2	5.036852028035988
u3	-1.7256926267146366
duration	0.2075	0.0012

Included in ephemeris calculations

Light Curve ( PNG, PDF - high resolution )
Posteriors ( PNG, PDF - high resolution )
Observation Data ( JSON )

Filter	Detail	Min	Max
I	Cousins I	721.0 nm	875.0 nm

Organization	Observer Code	Secondary Observers
EPW	TESS (collaborate/publish)

Light curve chart for 0a4d85039c288634b1a7708ca85aa3d5

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Parameter	Value	Uncertainty
Am1	0.9989	0.0013
Am2	0
a/R_s	6.675	0.041
R_p/R_s	0.0832	0.0012
ephemeris [JD]	2459474.392	0.0012
eccentricity	0.0
inclination [degrees]	88.24
omega [degrees]	0.0
orbital period [days]	4.04605063
u0	2.8883504684838117
u1	-5.198472535248046
u2	5.035002685027866
u3	-1.724880543236246
duration	0.206	0.0013

Included in ephemeris calculations

Light Curve ( PNG, PDF - high resolution )
Posteriors ( PNG, PDF - high resolution )
Observation Data ( JSON )

Filter	Detail	Min	Max
I	Cousins I	721.0 nm	875.0 nm

Organization	Observer Code	Secondary Observers
EPW	TESS (collaborate/publish)