results

HAT-P-26 b

Timing Plot

Total Reductions to Date: 7

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

Exoplanet Watch Ephemeris

Parameter Value Uncertainty
Orbital Period (Days) 4.234485728826604 3.9669918420706594e-07
Ephemeris (BJD_TDB) 2460085.3922254886 0.00030017900180814714
Time saved (hours) 0.0005  

Assumed Priors

Parameter Value Uncertainty Units Reference
RA 213.1565508 decimal
DEC 4.0594175 decimal
Host Star Metallicity -0.04 0.08 A-thano et al. 2023
Host Star log(g) 4.56 0.06 Log10(cgs) A-thano et al. 2023
Host Star Radius [R_Sun] 0.788 0.098 Sol A-thano et al. 2023
Host Star Effective Temperature [K] 5079.0 88.0 K A-thano et al. 2023
a/Rs 12.51 0.07 A-thano et al. 2023
eccentricity 0.12 0.06 Kokori et al. 2023
inclination [degrees] 87.82 0.05 deg A-thano et al. 2023
omega [degrees] 54.0 165.0 deg Kokori et al. 2023
orbital period [days] 4.234503 1e-06 day A-thano et al. 2023
Rp 7.1 0.5 R_Earth ExoFOP-TESS TOI
Rp/Rs 0.0783 0 ExoFOP-TESS TOI
ephemeris [JD] 2455304.65211 0.00036 BJD A-thano et al. 2023

Previously Published Mid-Transit Times

Value Uncertainty Units Reference
2455304.6518366667 0.00032 BJD, BJD-TDB, BJD-UTC A-thano et al. 2023, Stevenson et al. 2016, Hartman et al. 2011
2456545.36124 0.00028 BJD-TDB Ivshina & Winn 2022
2456892.59046 0.0001 BJD-TDB Kokori et al. 2022
2456901.059458 9.4e-05 BJD-TDB Kokori et al. 2023
2459666.190171 0.00122019 BJD ExoFOP-TESS TOI

Observations

Light curve chart for 0001466
Parameter Value Uncertainty
Am1 0.994 0.011
Am2 0.002 0.027
a/Rs 12.85 0.2
Rp/Rs 0.087 0.015
ephemeris [JD] 2459712.7496 0.0043
eccentricity 0.12
inclination [degrees] 87.82
omega [degrees] 54.0
orbital period [days] 4.234503
u0 1.5011564558589208
u1 -2.5641370648963013
u2 3.2496717374051416
u3 -1.1866910799438783
duration 0.0942 0.0025
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 LPAC (collaborate/publish)
Light curve chart for 0001526
Parameter Value Uncertainty
Am1 0.933 0.019
Am2 0.0488 0.005
a/Rs 12.86 0.19
Rp/Rs 0.1493 0.0072
ephemeris [JD] 2459729.68692 0.00035
eccentricity 0.12
inclination [degrees] 87.82
omega [degrees] 54.0
orbital period [days] 4.234503
u0 1.5518474700092824
u1 -2.684544460593746
u2 3.344218322448849
u3 -1.211521282031649
duration 0.1009 0.0018
Included in ephemeris calculations
Light Curve ( PNG, PDF - high resolution )
Posteriors ( PNG, PDF - high resolution )
Observation Data ( JSON )
Filter Detail Min Max
NA Custom 385.0 nm 700.0 nm
Organization Observer Code Secondary Observers
AAVSO NANF (collaborate/publish)
Light curve chart for 0003309
Parameter Value Uncertainty
Am1 0.9974 0.0042
Am2 0.0015 0.0014
a/Rs 12.16 0.18
Rp/Rs 0.0867 0.0044
ephemeris [JD] 2460055.7572 0.0034
eccentricity 0.12
inclination [degrees] 87.82
omega [degrees] 54.0
orbital period [days] 4.234503
u0 1.7987684795898953
u1 -3.1280482391587467
u2 3.621751261057439
u3 -1.2924714475202879
duration 0.1011 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 MBEB (collaborate/publish)
Light curve chart for 0003572
Parameter Value Uncertainty
Am1 1.0006 0.0035
Am2 -0.0005 0.0031
a/Rs 12.84 0.21
Rp/Rs 0.0583 0.0086
ephemeris [JD] 2460085.4102 0.0056
eccentricity 0.12
inclination [degrees] 87.82
omega [degrees] 54.0
orbital period [days] 4.234503
u0 1.8263858632949224
u1 -3.047133691458973
u2 3.466065961300661
u3 -1.245318081488203
duration 0.0916 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 KADB (collaborate/publish) PERC
Light curve chart for 926af73e2711f1c27ddb787524d536a1
Parameter Value Uncertainty
Am1 1.0 0.0016
Am2 0
a/Rs 12.17 0.15
Rp/Rs 0.0709 0.0019
ephemeris [JD] 2459674.6588 0.0011
eccentricity 0.12
inclination [degrees] 87.82
omega [degrees] 54.0
orbital period [days] 4.234503
u0 2.3698863603955695
u1 -4.104460316444567
u2 4.1885031740348175
u3 -1.4539291555722587
duration 0.0988 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 6cf6ed67e6058f353dcbbd020d8a3dd9
Parameter Value Uncertainty
Am1 1.0 0.0017
Am2 0
a/Rs 12.16 0.13
Rp/Rs 0.0746 0.002
ephemeris [JD] 2459687.3618 0.0011
eccentricity 0.12
inclination [degrees] 87.82
omega [degrees] 54.0
orbital period [days] 4.234503
u0 2.3716082956291396
u1 -4.108352147401841
u2 4.191842558045293
u3 -1.45509864380927
duration 0.0997 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 5b83c6b5239547ae0b13810d57df284a
Parameter Value Uncertainty
Am1 1.0006 0.0017
Am2 0
a/Rs 12.16 0.16
Rp/Rs 0.0717 0.002
ephemeris [JD] 2459670.4233 0.0012
eccentricity 0.12
inclination [degrees] 87.82
omega [degrees] 54.0
orbital period [days] 4.234503
u0 2.371037564921872
u1 -4.107153421505301
u2 4.190929843844932
u3 -1.454813924811782
duration 0.0993 0.0016
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)