results

HAT-P-4 b

Timing Plot

Total Reductions to Date: 16

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

Exoplanet Watch Ephemeris

Parameter Value Uncertainty
Orbital Period (Days) 3.0565236182797593 1.6044059339851757e-07
Ephemeris (BJD_TDB) 2460123.5098452577 0.00026576369942413696
Time saved (hours) -  

Assumed Priors

Parameter Value Uncertainty Units Reference
RA 229.99122 decimal
DEC 36.229545 decimal
Host Star Metallicity 0.33 0.08 Ment et al. 2018
Host Star log(g) 4.127 0.019 Log10(cgs) Kokori et al. 2023
Host Star Radius [R_Sun] 1.596 0.06 Sol Kokori et al. 2023
Host Star Effective Temperature [K] 5860.0 80.0 K Kokori et al. 2023
a/Rs 6.0 0.3 Kokori et al. 2023
eccentricity 0.084 0.014 Ment et al. 2018
inclination [degrees] 89.7 0.3 deg Kokori et al. 2023
omega [degrees] 97.4 9.7 deg Ment et al. 2018
orbital period [days] 3.05652301 2.9e-07 day Kokori et al. 2023
Rp 15.16 0.71 R_Earth ExoFOP-TESS TOI
Rp/Rs 0.0938 0 ExoFOP-TESS TOI
ephemeris [JD] 2455584.57238 0.00018 BJD-TDB Kokori et al. 2023

Previously Published Mid-Transit Times

Value Uncertainty Units Reference
2454245.81521 0.0002 BJD-TDB Bonomo et al. 2017
2454248.8716 0.0006 HJD Kovacs et al. 2007
2454502.56227 0.00021 BJD Christiansen et al. 2011
2454740.97205 0.0002 BJD-TDB Kokori et al. 2022
2455285.03215 0.00048499999999999997 BJD-TDB, HJD-UTC Ivshina & Winn 2022, Winn et al. 2011
2455584.57238 0.00018 BJD-TDB Kokori et al. 2023
2459716.992394 0.0003859 BJD ExoFOP-TESS TOI

Observations

Light curve chart for 0001633
Parameter Value Uncertainty
Am1 1.2975 0.0085
Am2 -0.2261 0.0092
a/Rs 6.26 0.88
Rp/Rs 0.117 0.044
ephemeris [JD] 2459762.82 0.012
eccentricity 0.084
inclination [degrees] 89.7
omega [degrees] 97.4
orbital period [days] 3.05652301
u0 2.4456522348954275
u1 -4.395456881068362
u2 4.560190066351001
u3 -1.61038535222594
duration 0.15 0.017
Not included in ephemeris calculations
Light Curve ( PNG, PDF - high resolution )
Posteriors ( PNG, PDF - high resolution )
Observation Data ( JSON )
Filter Detail Min Max
CBB Astrodon ExoPlanet-BB 500.0 nm 1000.0 nm
Organization Observer Code Secondary Observers
AAVSO LPAC (collaborate/publish)
Light curve chart for 0003910
Parameter Value Uncertainty
Am1 1.005 0.0024
Am2 -0.0045 0.0025
a/Rs 5.61 0.44
Rp/Rs 0.0865 0.0083
ephemeris [JD] 2460123.5109 0.007
eccentricity 0.084
inclination [degrees] 89.7
omega [degrees] 97.4
orbital period [days] 3.05652301
u0 2.164020157598374
u1 -3.774141711033297
u2 4.065367379405303
u3 -1.4552457653916862
duration 0.1676 0.0096
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 PJEF (collaborate/publish)
Light curve chart for 31350abe067ae9ecf92a9ae83a62535f
Parameter Value Uncertainty
Am1 0.9999 0.0015
Am2 0
a/Rs 5.521 0.08
Rp/Rs 0.085 0.0013
ephemeris [JD] 2458977.3137 0.0011
eccentricity 0.084
inclination [degrees] 89.7
omega [degrees] 97.4
orbital period [days] 3.05652301
u0 2.698662386981014
u1 -4.827412294935807
u2 4.782161786926214
u3 -1.6534118077116577
duration 0.177 0.0026
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 614ce7794182c8ebf49acbe91f96c3ad
Parameter Value Uncertainty
Am1 1.0001 0.0015
Am2 0
a/Rs 5.54 0.075
Rp/Rs 0.0837 0.0013
ephemeris [JD] 2459701.7079 0.0011
eccentricity 0.084
inclination [degrees] 89.7
omega [degrees] 97.4
orbital period [days] 3.05652301
u0 2.698620822849543
u1 -4.828041374723485
u2 4.78343968305808
u3 -1.6540190599053322
duration 0.1761 0.0025
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 9ae62d66394c8cdfedb15256d93ab4ac
Parameter Value Uncertainty
Am1 0.9996 0.0015
Am2 0
a/Rs 5.644 0.096
Rp/Rs 0.0814 0.0014
ephemeris [JD] 2459716.9917 0.0013
eccentricity 0.084
inclination [degrees] 89.7
omega [degrees] 97.4
orbital period [days] 3.05652301
u0 2.6986590630446585
u1 -4.828835715620022
u2 4.784938227574442
u3 -1.6547615036979435
duration 0.1723 0.003
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 1d726594607f3e365b4e4b13b34667eb
Parameter Value Uncertainty
Am1 0.9999 0.002
Am2 0
a/Rs 5.57 0.12
Rp/Rs 0.0831 0.0017
ephemeris [JD] 2458965.0875 0.0015
eccentricity 0.084
inclination [degrees] 89.7
omega [degrees] 97.4
orbital period [days] 3.05652301
u0 2.6984798653577036
u1 -4.828370362572628
u2 4.784365817804597
u3 -1.6544752492970662
duration 0.1755 0.0039
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 3ba588d273beb30339fa2c02ab2d16db
Parameter Value Uncertainty
Am1 1.0003 0.0016
Am2 0
a/Rs 5.51 0.11
Rp/Rs 0.0858 0.0015
ephemeris [JD] 2458974.2568 0.0016
eccentricity 0.084
inclination [degrees] 89.7
omega [degrees] 97.4
orbital period [days] 3.05652301
u0 2.6983003204417386
u1 -4.826779083108628
u2 4.781877019688218
u3 -1.653398185765809
duration 0.1774 0.0036
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 732d362c78ec5313319b473d59bc52a9
Parameter Value Uncertainty
Am1 0.9999 0.0014
Am2 0
a/Rs 5.53 0.073
Rp/Rs 0.0831 0.0013
ephemeris [JD] 2459689.4827 0.0011
eccentricity 0.084
inclination [degrees] 89.7
omega [degrees] 97.4
orbital period [days] 3.05652301
u0 2.6985236739915655
u1 -4.828445908105055
u2 4.784457518520967
u3 -1.6545352131135056
duration 0.1768 0.0024
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 d563d6557380d9962c5dba3ba2c53476
Parameter Value Uncertainty
Am1 0.9998 0.0015
Am2 0
a/Rs 5.573 0.081
Rp/Rs 0.0835 0.0014
ephemeris [JD] 2458962.0308 0.0011
eccentricity 0.084
inclination [degrees] 89.7
omega [degrees] 97.4
orbital period [days] 3.05652301
u0 2.698888905410481
u1 -4.828446218983268
u2 4.783677045547596
u3 -1.6541196606924657
duration 0.1749 0.0026
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 16250d9287836d7c61f0b32bd6cc502b
Parameter Value Uncertainty
Am1 0.9997 0.002
Am2 0
a/Rs 5.45 0.11
Rp/Rs 0.0827 0.0019
ephemeris [JD] 2458968.1429 0.0015
eccentricity 0.084
inclination [degrees] 89.7
omega [degrees] 97.4
orbital period [days] 3.05652301
u0 2.6985283953143306
u1 -4.827864433625794
u2 4.783280926085186
u3 -1.6539448164972819
duration 0.1793 0.0036
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 97cf5a5788f1d17343c3bbd7e3a3a441
Parameter Value Uncertainty
Am1 1.0001 0.0013
Am2 0
a/Rs 5.543 0.083
Rp/Rs 0.0838 0.0013
ephemeris [JD] 2459677.2582 0.0011
eccentricity 0.084
inclination [degrees] 89.7
omega [degrees] 97.4
orbital period [days] 3.05652301
u0 2.6986744022874163
u1 -4.82785421937327
u2 4.7831163663303125
u3 -1.6539364779704702
duration 0.1764 0.0027
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 3e0eb71aa7715d7197339a6d369c54d6
Parameter Value Uncertainty
Am1 1.0 0.0015
Am2 0
a/Rs 5.516 0.075
Rp/Rs 0.0842 0.0014
ephemeris [JD] 2458980.3691 0.0011
eccentricity 0.084
inclination [degrees] 89.7
omega [degrees] 97.4
orbital period [days] 3.05652301
u0 2.6984178100893423
u1 -4.827271894287153
u2 4.782526614356692
u3 -1.6536724588936806
duration 0.177 0.0025
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 b1c79f656d9eb8b445a1f6b45db42981
Parameter Value Uncertainty
Am1 1.0 0.0014
Am2 0
a/Rs 5.532 0.079
Rp/Rs 0.0828 0.0013
ephemeris [JD] 2459674.201 0.0011
eccentricity 0.084
inclination [degrees] 89.7
omega [degrees] 97.4
orbital period [days] 3.05652301
u0 2.6984931090680306
u1 -4.827530621231005
u2 4.782771011503327
u3 -1.6537334280715101
duration 0.1768 0.0026
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 92e7387900897f5adffe2c5401eefb34
Parameter Value Uncertainty
Am1 0.9999 0.0013
Am2 0
a/Rs 5.564 0.083
Rp/Rs 0.0838 0.0014
ephemeris [JD] 2459686.4271 0.0011
eccentricity 0.084
inclination [degrees] 89.7
omega [degrees] 97.4
orbital period [days] 3.05652301
u0 2.698190280835421
u1 -4.826743604177905
u2 4.782004786220733
u3 -1.653451391620825
duration 0.1757 0.0026
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 8d1f486b30dd90adf846daa8effcff84
Parameter Value Uncertainty
Am1 1.0004 0.0017
Am2 0
a/Rs 5.53 0.1
Rp/Rs 0.0834 0.0015
ephemeris [JD] 2459713.9365 0.0013
eccentricity 0.084
inclination [degrees] 89.7
omega [degrees] 97.4
orbital period [days] 3.05652301
u0 2.6982067410143484
u1 -4.82754216258927
u2 4.783512421502859
u3 -1.6541769286480479
duration 0.1768 0.0031
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 88e26f5f2f50b412ebdc3ac9cb0abc3c
Parameter Value Uncertainty
Am1 1.0002 0.0016
Am2 0
a/Rs 5.554 0.098
Rp/Rs 0.0844 0.0014
ephemeris [JD] 2459671.1452 0.0013
eccentricity 0.084
inclination [degrees] 89.7
omega [degrees] 97.4
orbital period [days] 3.05652301
u0 2.698995737687015
u1 -4.8293144149705585
u2 4.78503536357851
u3 -1.6547166149923833
duration 0.1761 0.0032
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)