results

HATS-2 b

Timing Plot

Total Reductions to Date: 9

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

Exoplanet Watch Ephemeris

Parameter Value Uncertainty
Orbital Period (Days) 1.3541338902512259 5.815365204110886e-08
Ephemeris (BJD_TDB) 2460034.591617894 0.00012125190517324016
Time saved (hours) -  

Assumed Priors

Parameter Value Uncertainty Units Reference
RA 176.7388264 decimal
DEC -22.5630097 decimal
Host Star Metallicity 0.15 0.05 Kokori et al. 2023
Host Star log(g) 4.51 0.012 Log10(cgs) Biagiotti et al. 2024
Host Star Radius [R_Sun] 0.876 0.02 Sol Biagiotti et al. 2024
Host Star Effective Temperature [K] 5227.0 95.0 K Kokori et al. 2023
a/Rs 5.5 0.09 Kokori et al. 2023
eccentricity 0.29 Bonomo et al. 2017
inclination [degrees] 87.83 0.18 deg Biagiotti et al. 2024
omega [degrees] 0.0 deg Mohler-Fischer et al. 2013
orbital period [days] 1.35413379 8e-08 day Biagiotti et al. 2024
Rp 12.58 0.27 R_Earth Biagiotti et al. 2024
Rp/Rs 0.1416 0 ExoFOP-TESS TOI
ephemeris [JD] 2458591.084931 9.6e-05 BJD-TDB Biagiotti et al. 2024

Previously Published Mid-Transit Times

Value Uncertainty Units Reference
2455954.586145 9e-05 BJD-TDB, BJD-UTC Bonomo et al. 2017, Mohler-Fischer et al. 2013
2457108.30842 0.0001 BJD-TDB Kokori et al. 2023
2458570.772731 0.00013907 BJD ExoFOP-TESS TOI
2458572.12696 0.00017 BJD-TDB Ivshina & Winn 2022
2458582.96001 0.00026 BJD Patel & Espinoza 2022
2458591.084931 9.6e-05 BJD-TDB Biagiotti et al. 2024

Observations

Light curve chart for 0005493
Parameter Value Uncertainty
Am1 1.128 0.064
Am2 -0.064 0.036
a/Rs 5.05 0.26
Rp/Rs 0.136 0.048
ephemeris [JD] 2459232.964 0.012
eccentricity 0.29
inclination [degrees] 87.83
omega [degrees] 0.0
orbital period [days] 1.35413379
u0 1.5618646305880415
u1 -2.672854325780529
u2 3.3060167893103585
u3 -1.195027044854382
duration 0.0924 0.0064
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 MJAT (collaborate/publish) MOBS
Light curve chart for 0008500
Parameter Value Uncertainty
Am1 1.161 0.023
Am2 -0.076 0.06
a/Rs 5.89 0.26
Rp/Rs 0.162 0.044
ephemeris [JD] 2459289.823 0.0075
eccentricity 0.29
inclination [degrees] 87.83
omega [degrees] 0.0
orbital period [days] 1.35413379
u0 1.5611574995108053
u1 -2.6708814116822848
u2 3.3037546145074645
u3 -1.1940306531062053
duration 0.0522 0.0078
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 WGAC (collaborate/publish) MOBS
Light curve chart for 0008608
Parameter Value Uncertainty
Am1 0.957 0.02
Am2 0.0191 0.0051
a/Rs 5.07 0.25
Rp/Rs 0.119 0.029
ephemeris [JD] 2459293.8702 0.0081
eccentricity 0.29
inclination [degrees] 87.83
omega [degrees] 0.0
orbital period [days] 1.35413379
u0 1.5613854833117868
u1 -2.6713370097450304
u2 3.3042676240669024
u3 -1.1943160483962343
duration 0.0907 0.0054
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 CPIB (collaborate/publish) MOBS
Light curve chart for 0012534
Parameter Value Uncertainty
Am1 0.881 0.037
Am2 0.085 0.067
a/Rs 5.92 0.25
Rp/Rs 0.281 0.083
ephemeris [JD] 2459296.57 0.012
eccentricity 0.29
inclination [degrees] 87.83
omega [degrees] 0.0
orbital period [days] 1.35413379
u0 1.5613442880718391
u1 -2.671549589654938
u2 3.3047644831226055
u3 -1.1945591322946787
duration 0.0438 0.0036
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 CANO (collaborate/publish) MOBS
Light curve chart for 0008377
Parameter Value Uncertainty
Am1 0.98 0.09
Am2 0.011 0.02
a/Rs 5.07 0.26
Rp/Rs 0.237 0.073
ephemeris [JD] 2459304.731 0.0091
eccentricity 0.29
inclination [degrees] 87.83
omega [degrees] 0.0
orbital period [days] 1.35413379
u0 1.5614239155919374
u1 -2.671905919434503
u2 3.305224106897519
u3 -1.1947420538032767
duration 0.0997 0.008
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 NLIC (collaborate/publish) MOBS
Light curve chart for 0012731
Parameter Value Uncertainty
Am1 1.44 0.13
Am2 -0.123 0.04
a/Rs 5.57 0.26
Rp/Rs 0.283 0.077
ephemeris [JD] 2459303.348 0.011
eccentricity 0.29
inclination [degrees] 87.83
omega [degrees] 0.0
orbital period [days] 1.35413379
u0 1.5611330553866263
u1 -2.6713554695465387
u2 3.3045568371700496
u3 -1.1943343737684033
duration 0.041 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 PJOO (collaborate/publish) MOBS
Light curve chart for 0012457
Parameter Value Uncertainty
Am1 0.973 0.05
Am2 0.04 0.16
a/Rs 5.82 0.26
Rp/Rs 0.254 0.078
ephemeris [JD] 2459323.657 0.011
eccentricity 0.29
inclination [degrees] 87.83
omega [degrees] 0.0
orbital period [days] 1.35413379
u0 1.5618972263034994
u1 -2.6723793484134566
u2 3.3051214496181394
u3 -1.1946392782580348
duration 0.048 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 MYOA (collaborate/publish) MOBS
Light curve chart for 0009651
Parameter Value Uncertainty
Am1 1.66 0.19
Am2 -0.259 0.066
a/Rs 5.08 0.25
Rp/Rs 0.26 0.076
ephemeris [JD] 2459656.7676 0.0096
eccentricity 0.29
inclination [degrees] 87.83
omega [degrees] 0.0
orbital period [days] 1.35413379
u0 1.5618578882573058
u1 -2.6725518996386115
u2 3.3055351030477236
u3 -1.1948410424101064
duration 0.1026 0.008
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 DTEC (collaborate/publish) MOBS
Light curve chart for 0003132
Parameter Value Uncertainty
Am1 0.9676 0.0056
Am2 0.0282 0.0057
a/Rs 5.05 0.072
Rp/Rs 0.1282 0.0052
ephemeris [JD] 2460034.5922 0.0014
eccentricity 0.29
inclination [degrees] 87.83
omega [degrees] 0.0
orbital period [days] 1.35413379
u0 1.8267019300732137
u1 -3.045454180008576
u2 3.45164821023133
u3 -1.2328959088624014
duration 0.0919 0.0015
Included in ephemeris calculations
Light Curve ( PNG, PDF - high resolution )
Posteriors ( PNG, PDF - high resolution )
Observation Data ( JSON )
Filter Detail Min Max
SR Sloan r 553.1 nm 693.1 nm
Organization Observer Code Secondary Observers
AAVSO VJCA (collaborate/publish)