results

HD 209458 b

Timing Plot

Total Reductions to Date: 10

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

Exoplanet Watch Ephemeris

Parameter Value Uncertainty
Orbital Period (Days) 3.5247490552509713 3.736056284936116e-08
Ephemeris (BJD_TDB) 2460552.8792646155 9.059626122912583e-05
Time saved (hours) 0.0002  

Assumed Priors

Parameter Value Uncertainty Units Reference
RA 330.7950219 decimal
DEC 18.8842419 decimal
Host Star Metallicity 0.01 0.05 Panek et al. 2023
Host Star log(g) 4.45 0.02 Log10(cgs) Panek et al. 2023
Host Star Radius [R_Sun] 1.19 0.02 Sol Panek et al. 2023
Host Star Effective Temperature [K] 6091.0 10.0 K Panek et al. 2023
a/Rs 8.76 0.04 Kokori et al. 2023
eccentricity 0.01 0.011 Rosenthal et al. 2021
inclination [degrees] 86.71 0.05 deg Kokori et al. 2023
omega [degrees] 0.0 63.0 deg Rosenthal et al. 2021
orbital period [days] 3.52474955 3.2e-07 day Kokori et al. 2023
Rp 9.19 0.68 R_Earth Panek et al. 2023
Rp/Rs 0.1334 0 ExoFOP-TESS TOI
ephemeris [JD] 2455420.84456 0.00016 BJD-TDB Kokori et al. 2023

Previously Published Mid-Transit Times

Value Uncertainty Units Reference
2451430.8227 0.003 HJD Charbonneau et al. 2000
2451490.765 0.02 JD Henry et al. 2000
2451659.93742 2e-05 BJD-TDB Albrecht et al. 2012
2452826.628902 8.7e-05 BJD-TDB, HJD Bonomo et al. 2017, Knutson et al. 2007
2452900.641 0.013 BJD Rosenthal et al. 2021
2454560.80588 8e-05 BJD-TDB Evans et al. 2015
2455015.49844 0.00012 BJD-TDB Kokori et al. 2022
2455420.84456 0.00016 BJD-TDB Kokori et al. 2023
2460552.87974 0.0002144 BJD ExoFOP-TESS TOI

Observations

Light curve chart for 0002085
Parameter Value Uncertainty
Am1 1.234 0.013
Am2 -0.145 0.022
a/Rs 8.66 0.12
Rp/Rs 0.126 0.034
ephemeris [JD] 2459886.6951 0.0074
eccentricity 0.01
inclination [degrees] 86.71
omega [degrees] 0.0
orbital period [days] 3.52474955
u0 2.3171070167683396
u1 -4.083161525707247
u2 4.342863329870296
u3 -1.576808756217682
duration 0.0422 0.0076
Not included in ephemeris calculations
Light Curve ( PNG, PDF - high resolution )
Posteriors ( PNG, PDF - high resolution )
Observation Data ( JSON )
Filter Detail Min Max
NA Custom 605.0 nm 700.0 nm
Organization Observer Code Secondary Observers
AAVSO KRYA (collaborate/publish)
Light curve chart for 0005169
Parameter Value Uncertainty
Am1 0.959 0.02
Am2 0.039 0.038
a/Rs 8.84 0.12
Rp/Rs 0.087 0.037
ephemeris [JD] 2460179.255 0.011
eccentricity 0.01
inclination [degrees] 86.71
omega [degrees] 0.0
orbital period [days] 3.52474955
u0 2.1146562898697145
u1 -3.8922930591753673
u2 4.447062503242176
u3 -1.669425667670128
duration 0.052 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
CV MObs CV 350.0 nm 850.0 nm
Organization Observer Code Secondary Observers
AAVSO PMIF (collaborate/publish) UNIS
Light curve chart for bccdafb5e7a8111551db10a329c6f798
Parameter Value Uncertainty
Am1 1.00016 0.00051
Am2 0
a/Rs 8.797 0.041
Rp/Rs 0.12075 0.00065
ephemeris [JD] 2459851.45425 0.00031
eccentricity 0.01
inclination [degrees] 86.71
omega [degrees] 0.0
orbital period [days] 3.52474955
u0 2.7682446709177815
u1 -4.984948682550299
u2 4.948055878123386
u3 -1.73135179275909
duration 0.12787 0.00077
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 b387af5b309c24ead4f22bb3f4f731f2
Parameter Value Uncertainty
Am1 1.0 0.00054
Am2 0
a/Rs 8.788 0.042
Rp/Rs 0.12042 0.00067
ephemeris [JD] 2459830.30573 0.00032
eccentricity 0.01
inclination [degrees] 86.71
omega [degrees] 0.0
orbital period [days] 3.52474955
u0 2.768840604799483
u1 -4.987081819918732
u2 4.950607540444494
u3 -1.7323662515554443
duration 0.12844 0.00079
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 5dfb7e43e3c0cfe46f8beff84fd6b163
Parameter Value Uncertainty
Am1 0.9999 0.00052
Am2 0
a/Rs 8.799 0.041
Rp/Rs 0.12058 0.00065
ephemeris [JD] 2459826.78093 0.00031
eccentricity 0.01
inclination [degrees] 86.71
omega [degrees] 0.0
orbital period [days] 3.52474955
u0 2.7680984285644574
u1 -4.984206715824705
u2 4.94701254200648
u3 -1.730904181030001
duration 0.12794 0.00079
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 fa584d38f69ea003d5f00bba6c44368b
Parameter Value Uncertainty
Am1 1.00011 0.00052
Am2 0
a/Rs 8.794 0.041
Rp/Rs 0.12068 0.00066
ephemeris [JD] 2459844.4047 0.00032
eccentricity 0.01
inclination [degrees] 86.71
omega [degrees] 0.0
orbital period [days] 3.52474955
u0 2.7686291231692732
u1 -4.986560575977728
u2 4.950113832137987
u3 -1.7321823055670884
duration 0.12793 0.00079
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 25b61f1877dd298ca5b70964fabda612
Parameter Value Uncertainty
Am1 0.99992 0.00052
Am2 0
a/Rs 8.797 0.042
Rp/Rs 0.12054 0.00066
ephemeris [JD] 2459833.83047 0.00032
eccentricity 0.01
inclination [degrees] 86.71
omega [degrees] 0.0
orbital period [days] 3.52474955
u0 2.769032003984882
u1 -4.9881964569486
u2 4.952258541518563
u3 -1.7330940147604421
duration 0.12788 0.00078
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 af85b0095586fdf2964e61e286512149
Parameter Value Uncertainty
Am1 1.00013 0.00053
Am2 0
a/Rs 8.793 0.041
Rp/Rs 0.12081 0.00063
ephemeris [JD] 2459847.92944 0.00031
eccentricity 0.01
inclination [degrees] 86.71
omega [degrees] 0.0
orbital period [days] 3.52474955
u0 2.767994565068474
u1 -4.983920269807855
u2 4.946764386005989
u3 -1.7308386075540754
duration 0.12838 0.00075
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 3859f6b398e9b595123eab5e9935c75b
Parameter Value Uncertainty
Am1 1.00012 0.00054
Am2 0
a/Rs 8.807 0.042
Rp/Rs 0.1206 0.00067
ephemeris [JD] 2459837.35516 0.00033
eccentricity 0.01
inclination [degrees] 86.71
omega [degrees] 0.0
orbital period [days] 3.52474955
u0 2.767995469108766
u1 -4.983747960472612
u2 4.946413203465504
u3 -1.7306606383943581
duration 0.12788 0.00081
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 60c28e75adb7372db5d203c7a51e8623
Parameter Value Uncertainty
Am1 0.99997 0.00053
Am2 0
a/Rs 8.807 0.042
Rp/Rs 0.12081 0.00066
ephemeris [JD] 2459840.87991 0.00032
eccentricity 0.01
inclination [degrees] 86.71
omega [degrees] 0.0
orbital period [days] 3.52474955
u0 2.7624597022033086
u1 -4.966444089796143
u2 4.928064819192485
u3 -1.7240803581657627
duration 0.12787 0.00079
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)