results

HAT-P-28 b

Timing Plot

Total Reductions to Date: 11

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

Exoplanet Watch Ephemeris

Parameter Value Uncertainty
Orbital Period (Days) 3.2572131486970837 4.6809788471469116e-07
Ephemeris (BJD_TDB) 2460231.7599255824 0.0003372891075670152
Time saved (hours) -  

Assumed Priors

Parameter Value Uncertainty Units Reference
RA 13.0009159 decimal
DEC 34.728402 decimal
Host Star Metallicity 0.12 0.08 Kokori et al. 2023
Host Star log(g) 4.36 0.06 Log10(cgs) Kokori et al. 2023
Host Star Radius [R_Sun] 1.103 0.091 Sol Kokori et al. 2023
Host Star Effective Temperature [K] 5680.0 90.0 K Kokori et al. 2023
a/Rs 8.4 0.6 Kokori et al. 2023
eccentricity 0.05 0.03 Kokori et al. 2023
inclination [degrees] 88.0 0.9 deg Kokori et al. 2023
omega [degrees] 233.0 90.0 deg Kokori et al. 2023
orbital period [days] 3.25721296 8e-07 day Kokori et al. 2023
Rp 12.36 0.67 R_Earth ExoFOP-TESS TOI
Rp/Rs 0.1173 0 ExoFOP-TESS TOI
ephemeris [JD] 2458134.11472 0.0003 BJD-TDB Kokori et al. 2023

Previously Published Mid-Transit Times

Value Uncertainty Units Reference
2455417.5987 0.00053 BJD-TDB, BJD-UTC Bonomo et al. 2017, Buchhave et al. 2011
2458124.34308 0.00022 BJD-TDB Kokori et al. 2022
2458134.11472 0.0003 BJD-TDB Kokori et al. 2023
2459853.92256 0.00072583 BJD ExoFOP-TESS TOI

Observations

Light curve chart for 0000576
Parameter Value Uncertainty
Am1 0.9824 0.0069
Am2 0.017 0.024
a/Rs 8.89 1.06
Rp/Rs 0.108 0.03
ephemeris [JD] 2458469.608 0.0062
eccentricity 0.05
inclination [degrees] 88.0
omega [degrees] 233.0
orbital period [days] 3.25721296
u0 2.0046493976014146
u1 -3.644654411575162
u2 4.157007658194177
u3 -1.5170025822761875
duration 0.13 0.014
Not included in ephemeris calculations
Light Curve ( PNG, PDF - high resolution )
Posteriors ( PNG, PDF - high resolution )
Observation Data ( JSON )
Filter Detail Min Max
CV Clear (unfiltered) reduced to V sequence 350.0 nm 850.0 nm
Organization Observer Code Secondary Observers
AAVSO MWAA (collaborate/publish)
Light curve chart for 0004327
Parameter Value Uncertainty
Am1 0.9695 0.0067
Am2 0.027 0.046
a/Rs 9.6 1.33
Rp/Rs 0.131 0.034
ephemeris [JD] 2460182.8933 0.0069
eccentricity 0.05
inclination [degrees] 88.0
omega [degrees] 233.0
orbital period [days] 3.25721296
u0 1.7396850692714505
u1 -3.06345062015347
u2 3.702975408125729
u3 -1.3792098020650765
duration 0.111 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 CCHD (collaborate/publish)
Light curve chart for 0004741
Parameter Value Uncertainty
Am1 1.07 0.011
Am2 -0.0644 0.007
a/Rs 8.66 0.38
Rp/Rs 0.1422 0.005
ephemeris [JD] 2460231.7651 0.0027
eccentricity 0.05
inclination [degrees] 88.0
omega [degrees] 233.0
orbital period [days] 3.25721296
u0 1.9571598588624521
u1 -3.5257118234301883
u2 4.055514261661745
u3 -1.4869622366621371
duration 0.1374 0.0064
Included in ephemeris calculations
Light Curve ( PNG, PDF - high resolution )
Posteriors ( PNG, PDF - high resolution )
Observation Data ( JSON )
Filter Detail Min Max
NA Custom 400.0 nm 800.0 nm
Organization Observer Code Secondary Observers
AAVSO BIRC (collaborate/publish)
Light curve chart for 1b53d02fc59a872384b4c0ecebad6d2c
Parameter Value Uncertainty
Am1 0.9999 0.0033
Am2 0
a/Rs 8.48 0.19
Rp/Rs 0.1066 0.0024
ephemeris [JD] 2459879.9832 0.0014
eccentricity 0.05
inclination [degrees] 88.0
omega [degrees] 233.0
orbital period [days] 3.25721296
u0 2.6409405619451163
u1 -4.739265754860698
u2 4.753504624683576
u3 -1.6551793609352559
duration 0.1356 0.0035
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 f0a014ae22cf14b02814060bc5a0da61
Parameter Value Uncertainty
Am1 1.0001 0.0038
Am2 0
a/Rs 8.39 0.24
Rp/Rs 0.1104 0.0026
ephemeris [JD] 2459873.4649 0.0017
eccentricity 0.05
inclination [degrees] 88.0
omega [degrees] 233.0
orbital period [days] 3.25721296
u0 2.640878496921141
u1 -4.738909282370489
u2 4.7529625055600775
u3 -1.6549316492860693
duration 0.1379 0.0043
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 e55e854eef339f1d76d21186e5deee8a
Parameter Value Uncertainty
Am1 0.9993 0.004
Am2 0
a/Rs 8.8 0.22
Rp/Rs 0.1062 0.003
ephemeris [JD] 2459860.4367 0.0015
eccentricity 0.05
inclination [degrees] 88.0
omega [degrees] 233.0
orbital period [days] 3.25721296
u0 2.640513602046345
u1 -4.7382003507205335
u2 4.752504576207015
u3 -1.6548177567149893
duration 0.1302 0.0037
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 2f5cea3816b4b4d84a4d75651036a22e
Parameter Value Uncertainty
Am1 0.9998 0.0033
Am2 0
a/Rs 8.72 0.16
Rp/Rs 0.1128 0.0024
ephemeris [JD] 2459870.2106 0.0011
eccentricity 0.05
inclination [degrees] 88.0
omega [degrees] 233.0
orbital period [days] 3.25721296
u0 2.6418706096775626
u1 -4.742599761929922
u2 4.75766593385183
u3 -1.6569367107047235
duration 0.1322 0.0028
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 20dd3d31cf053cf2dff9e74923df89a5
Parameter Value Uncertainty
Am1 1.0029 0.004
Am2 0
a/Rs 8.42 0.2
Rp/Rs 0.1146 0.0026
ephemeris [JD] 2459866.9496 0.0014
eccentricity 0.05
inclination [degrees] 88.0
omega [degrees] 233.0
orbital period [days] 3.25721296
u0 2.6412719186143248
u1 -4.740328237515084
u2 4.754819599384323
u3 -1.65576320963123
duration 0.1375 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 f32400d162bb9263f3b67b879bbab060
Parameter Value Uncertainty
Am1 0.9991 0.0034
Am2 0
a/Rs 8.61 0.17
Rp/Rs 0.1093 0.0025
ephemeris [JD] 2459853.9218 0.0013
eccentricity 0.05
inclination [degrees] 88.0
omega [degrees] 233.0
orbital period [days] 3.25721296
u0 2.641547041972345
u1 -4.7413760457855725
u2 4.756181489397979
u3 -1.6563524147121242
duration 0.1337 0.0028
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 363f4c1fcd4825857df34f831f4d9b18
Parameter Value Uncertainty
Am1 1.0006 0.0034
Am2 0
a/Rs 8.73 0.22
Rp/Rs 0.1118 0.0026
ephemeris [JD] 2459857.179 0.0015
eccentricity 0.05
inclination [degrees] 88.0
omega [degrees] 233.0
orbital period [days] 3.25721296
u0 2.6412426346173987
u1 -4.739877431306261
u2 4.7539659436563335
u3 -1.6553310761278581
duration 0.1318 0.0037
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 03a60df559f5cb8c3826c576a41d9927
Parameter Value Uncertainty
Am1 0.9997 0.0035
Am2 0
a/Rs 8.81 0.16
Rp/Rs 0.11 0.0025
ephemeris [JD] 2459876.7246 0.0012
eccentricity 0.05
inclination [degrees] 88.0
omega [degrees] 233.0
orbital period [days] 3.25721296
u0 2.6399100139864684
u1 -4.736691970259776
u2 4.750943226120525
u3 -1.6541611990526475
duration 0.1307 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)