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HAT-P-18 b

View target in exoplanet catalog
chart

Total Reductions to Date: 6

Date Processed: 06/03/2023 at 06:50:22 (PDT)

Exoplanet Watch Ephemeris

Parameter Value Uncertainty
Orbital Period (Days) 5.508029608846454 1.6647197204624815e-07
Ephemeris (BJD_TDB) 2460090.859257077 2.711883939927771e-05
Time saved (hours) 0.0003  

Assumed Priors

Parameter Value Uncertainty Units Reference
RA 256.346376 decimal
DEC 33.0123251 decimal
Host Star Metallicity 0.1 0.08 Patel & Espinoza 2022
Host Star log(g) 4.57 0.04 Log10(cgs) Patel & Espinoza 2022
Host Star Radius [R_Sun] 0.75 0.04 Sol Patel & Espinoza 2022
Host Star Effective Temperature [K] 4803.0 80.0 K Patel & Espinoza 2022
a/Rs 16.52 0.06 Fu et al. 2022
eccentricity 0.087 0.03 Bonomo et al. 2017
inclination [degrees] 88.66 0.03 deg Fu et al. 2022
omega [degrees] 104.0 50.0 deg Esposito et al. 2014
orbital period [days] 5.5080232 5.6e-06 day Patel & Espinoza 2022
Rp 10.73 0.74 R_Earth ExoFOP-TESS TOI
Rp/Rs 0.1469 0 ExoFOP-TESS TOI
ephemeris [JD] 2459743.853395 2.3e-05 BJD-TDB Fu et al. 2022

Previously Published Mid-Transit Times

Value Uncertainty Units Reference
2454715.022256667 0.00026333333333333336 BJD-TDB, BJD-UTC Bonomo et al. 2017, Seeliger et al. 2015, Hartman et al. 2011
2456411.49556 0.00053 BJD-TDB Ivshina & Winn 2022
2457276.25646 0.0001 BJD-TDB Kokori et al. 2022
2457507.592196 0.000194 BJD Kirk et al. 2017
2458983.744992 0.000385 BJD ExoFOP-TESS TOI
2459033.31735 0.00021 BJD Patel & Espinoza 2022
2459743.853395 2.3e-05 BJD-TDB Fu et al. 2022

Observations

Light curve chart for 0003657
Parameter Value Uncertainty
Am1 0.995 0.023
Am2 0.0053 0.0062
a/Rs 16.35 0.17
Rp/Rs 0.095 0.036
ephemeris [JD] 2456697.916 0.011
eccentricity 0.087
inclination [degrees] 88.66
omega [degrees] 104.0
orbital period [days] 5.5080232
u0 1.3954280896164044
u1 -2.4044808547189565
u2 3.102329301534782
u3 -1.09327653643223
duration 0.079 0.011
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 SPUA (collaborate/publish) MOBS
Light curve chart for 0000671
Parameter Value Uncertainty
Am1 0.982 0.014
Am2 0.015 0.058
a/Rs 16.23 0.17
Rp/Rs 0.13 0.023
ephemeris [JD] 2458658.7739 0.0037
eccentricity 0.087
inclination [degrees] 88.66
omega [degrees] 104.0
orbital period [days] 5.5080232
u0 1.7099154857411762
u1 -2.9705907818171005
u2 3.473301343312486
u3 -1.212626047236562
duration 0.1068 0.0027
Not included in ephemeris calculations
Light Curve ( PNG, PDF - high resolution )
Posteriors ( PNG, PDF - high resolution )
Observation Data ( JSON )
Filter Detail Min Max
CV MObs CV 350.0 nm 850.0 nm
Organization Observer Code Secondary Observers
AAVSO FMAA (collaborate/publish) MOBS
Light curve chart for 0000307
Parameter Value Uncertainty
Am1 0.2331 0.0012
Am2 0.104 0.019
a/Rs 16.22 0.15
Rp/Rs 0.1177 0.0056
ephemeris [JD] 2458983.7442 0.0015
eccentricity 0.087
inclination [degrees] 88.66
omega [degrees] 104.0
orbital period [days] 5.5080232
u0 1.7101786595514823
u1 -2.9715738681473334
u2 3.4746290247772817
u3 -1.2132338161814307
duration 0.1055 0.0012
Included in ephemeris calculations
Light Curve ( PNG, PDF - high resolution )
Posteriors ( PNG, PDF - high resolution )
Observation Data ( JSON )
Filter Detail Min Max
CV MObs CV 350.0 nm 850.0 nm
Organization Observer Code Secondary Observers
AAVSO SGEO (collaborate/publish)
Light curve chart for 0000672
Parameter Value Uncertainty
Am1 0.988 0.014
Am2 0.0111 0.0063
a/Rs 16.23 0.17
Rp/Rs 0.123 0.012
ephemeris [JD] 2459038.8264 0.0046
eccentricity 0.087
inclination [degrees] 88.66
omega [degrees] 104.0
orbital period [days] 5.5080232
u0 1.7101983714137599
u1 -2.9709925419975454
u2 3.473769827828074
u3 -1.2129756572442885
duration 0.1062 0.0018
Included in ephemeris calculations
Light Curve ( PNG, PDF - high resolution )
Posteriors ( PNG, PDF - high resolution )
Observation Data ( JSON )
Filter Detail Min Max
CV MObs CV 350.0 nm 850.0 nm
Organization Observer Code Secondary Observers
AAVSO FMAA (collaborate/publish) MOBS
Light curve chart for 0001713
Parameter Value Uncertainty
Am1 1.003 0.022
Am2 -0.0015 0.0056
a/Rs 16.77 0.17
Rp/Rs 0.122 0.027
ephemeris [JD] 2459765.8826 0.0072
eccentricity 0.087
inclination [degrees] 88.66
omega [degrees] 104.0
orbital period [days] 5.5080232
u0 1.7101697875059412
u1 -2.971032755113995
u2 3.473655753840144
u3 -1.2127927862320904
duration 0.102 0.003
Not included in ephemeris calculations
Light Curve ( PNG, PDF - high resolution )
Posteriors ( PNG, PDF - high resolution )
Observation Data ( JSON )
Filter Detail Min Max
CV MObs CV 350.0 nm 850.0 nm
Organization Observer Code Secondary Observers
AAVSO FMAA (collaborate/publish) MOBS
Light curve chart for 0003621
Parameter Value Uncertainty
Am1 0.9753 0.0036
Am2 0.022 0.035
a/Rs 16.23 0.17
Rp/Rs 0.126 0.012
ephemeris [JD] 2460090.861 0.0021
eccentricity 0.087
inclination [degrees] 88.66
omega [degrees] 104.0
orbital period [days] 5.5080232
u0 1.7103487441702554
u1 -2.9714193076690734
u2 3.474230040216403
u3 -1.213159476717585
duration 0.1063 0.0017
Included in ephemeris calculations
Light Curve ( PNG, PDF - high resolution )
Posteriors ( PNG, PDF - high resolution )
Observation Data ( JSON )
Filter Detail Min Max
CV MObs CV 350.0 nm 850.0 nm
Organization Observer Code Secondary Observers
AAVSO MBEB (collaborate/publish)

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