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HAT-P-8 b

View target in exoplanet catalog
Timing Plot
Global Light Curve

Total Reductions to Date: 9

Date Processed: 09/24/2023 at 00:07:22 (PDT)

Exoplanet Watch Ephemeris

Parameter Value Uncertainty
Orbital Period (Days) 3.076343799188688 1.9612681472099596e-07
Ephemeris (BJD_TDB) 2459852.040479527 0.00012506488029399726
Time saved (hours) 0.0037  

Assumed Priors

Parameter Value Uncertainty Units Reference
RA 343.0414932 decimal
DEC 35.4471778 decimal
Host Star Metallicity 0.01 0.08 Bonomo et al. 2017
Host Star log(g) 4.24 0.08 Log10(cgs) ExoFOP-TESS TOI
Host Star Radius [R_Sun] 1.58 0.08 Sol Kokori et al. 2022
Host Star Effective Temperature [K] 6200.0 80.0 K Kokori et al. 2022
a/Rs 6.13 0.29 Stassun et al. 2017
eccentricity 0.006 0.016 Bonomo et al. 2017
inclination [degrees] 87.5 1.9 deg Bonomo et al. 2017
omega [degrees] 116.0 150.0 deg Knutson et al. 2014
orbital period [days] 3.0763427 3e-06 day Ivshina & Winn 2022
Rp 14.22 0.61 R_Earth ExoFOP-TESS TOI
Rp/Rs 0.0974 0 ExoFOP-TESS TOI
ephemeris [JD] 2455409.80001 0.00047 BJD-TDB Ivshina & Winn 2022

Previously Published Mid-Transit Times

Value Uncertainty Units Reference
2454437.675256667 0.00072 BJD, BJD-TDB Bonomo et al. 2017, Moutou et al. 2011, Latham et al. 2009
2455409.80001 0.00047 BJD-TDB Ivshina & Winn 2022
2455945.0839 0.0003 BJD-TDB Kokori et al. 2022
2459827.429945 0.000248 BJD ExoFOP-TESS TOI

Observations

Light curve chart for 0000894
Parameter Value Uncertainty
Am1 1.068 0.019
Am2 -0.031 0.012
a/Rs 6.33 0.31
Rp/Rs 0.1946 0.0064
ephemeris [JD] 2459476.7253 0.0041
eccentricity 0.006
inclination [degrees] 87.5
omega [degrees] 116.0
orbital period [days] 3.0763427
u0 1.870846863978314
u1 -3.386943730997923
u2 4.06587162031781
u3 -1.549774692711992
duration 0.1469 0.0046
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 LPAC (collaborate/publish)
Light curve chart for 8760a512f304fbb207ec92025a86424e
Parameter Value Uncertainty
Am1 1.0 0.0019
Am2 0
a/Rs 6.285 0.034
Rp/Rs 0.09226 0.00053
ephemeris [JD] 2459842.81112 0.00042
eccentricity 0.006
inclination [degrees] 87.5
omega [degrees] 116.0
orbital period [days] 3.0763427
u0 2.7701303487595665
u1 -5.012889388240952
u2 4.979223838983004
u3 -1.7364647253054017
duration 0.1645 0.001
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 8fb6f47d12d5f9f2a34ed60f3aa063df
Parameter Value Uncertainty
Am1 1.0 0.002
Am2 0
a/Rs 6.257 0.03
Rp/Rs 0.09213 0.00054
ephemeris [JD] 2459836.65895 0.00038
eccentricity 0.006
inclination [degrees] 87.5
omega [degrees] 116.0
orbital period [days] 3.0763427
u0 2.771204070987009
u1 -5.0164413144770625
u2 4.983430731465762
u3 -1.7381934137168038
duration 0.16543 0.00095
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 a35d42801aed8cf50725f685e631feaa
Parameter Value Uncertainty
Am1 1.0 0.0019
Am2 0
a/Rs 6.319 0.034
Rp/Rs 0.09152 0.00054
ephemeris [JD] 2459839.73515 0.00041
eccentricity 0.006
inclination [degrees] 87.5
omega [degrees] 116.0
orbital period [days] 3.0763427
u0 2.7706719094720267
u1 -5.015074509538296
u2 4.982398854143698
u3 -1.7379961798338996
duration 0.1636 0.001
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 ce3b8feba160f83055d2bf2679e8bd85
Parameter Value Uncertainty
Am1 1.0001 0.002
Am2 0
a/Rs 6.252 0.035
Rp/Rs 0.09141 0.00055
ephemeris [JD] 2459848.96415 0.00043
eccentricity 0.006
inclination [degrees] 87.5
omega [degrees] 116.0
orbital period [days] 3.0763427
u0 2.7709159379214006
u1 -5.015523507592503
u2 4.982491306573577
u3 -1.737883662657568
duration 0.1654 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 93bc9b7c6653ae0c1fe588c5d2fb3542
Parameter Value Uncertainty
Am1 1.0001 0.002
Am2 0
a/Rs 6.269 0.035
Rp/Rs 0.09124 0.00056
ephemeris [JD] 2459852.0402 0.00042
eccentricity 0.006
inclination [degrees] 87.5
omega [degrees] 116.0
orbital period [days] 3.0763427
u0 2.7712442569850144
u1 -5.017892151615264
u2 4.986035709498759
u3 -1.7393877405707872
duration 0.1654 0.001
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 5a4d3ee110373aef7a1276926c8157a0
Parameter Value Uncertainty
Am1 1.0001 0.002
Am2 0
a/Rs 6.3 0.033
Rp/Rs 0.09166 0.00059
ephemeris [JD] 2459833.58164 0.00041
eccentricity 0.006
inclination [degrees] 87.5
omega [degrees] 116.0
orbital period [days] 3.0763427
u0 2.7709231791416897
u1 -5.016602863517432
u2 4.984431407322983
u3 -1.738751648673425
duration 0.1645 0.001
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 acca5d5b996d125a1e3293966c559b9f
Parameter Value Uncertainty
Am1 1.0 0.0019
Am2 0
a/Rs 6.313 0.033
Rp/Rs 0.09204 0.00052
ephemeris [JD] 2459827.42989 0.00039
eccentricity 0.006
inclination [degrees] 87.5
omega [degrees] 116.0
orbital period [days] 3.0763427
u0 2.7707091364572425
u1 -5.015313795085036
u2 4.982559438266281
u3 -1.7379547053925664
duration 0.16448 0.00099
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 87318e0e5e533f4c5132df65cacd568c
Parameter Value Uncertainty
Am1 1.0 0.002
Am2 0
a/Rs 6.259 0.035
Rp/Rs 0.09215 0.00055
ephemeris [JD] 2459830.50642 0.00044
eccentricity 0.006
inclination [degrees] 87.5
omega [degrees] 116.0
orbital period [days] 3.0763427
u0 2.770005028471348
u1 -5.013379139256382
u2 4.980534426290592
u3 -1.7371602412898115
duration 0.1654 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)

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