results

HAT-P-27 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) 3.039578651265874 2.4888290614916255e-07
Ephemeris (BJD_TDB) 2459775.783644887 0.00026497725873021163
Time saved (hours) -  

Assumed Priors

Parameter Value Uncertainty Units Reference
RA 222.7673221 decimal
DEC 5.9473626 decimal
Host Star Metallicity 0.29 0.1 Kokori et al. 2023
Host Star log(g) 4.51 0.04 Log10(cgs) Kokori et al. 2023
Host Star Radius [R_Sun] 0.898 0.054 Sol Kokori et al. 2023
Host Star Effective Temperature [K] 5300.0 90.0 K Kokori et al. 2023
a/Rs 9.7 0.4 Kokori et al. 2023
eccentricity 0.08 0.05 Kokori et al. 2023
inclination [degrees] 84.7 0.4 deg Kokori et al. 2023
omega [degrees] 63.0 64.0 deg Kokori et al. 2023
orbital period [days] 3.03957804 2.4e-07 day Kokori et al. 2023
Rp 10.91 0.6 R_Earth ExoFOP-TESS TOI
Rp/Rs 0.1111 0 ExoFOP-TESS TOI
ephemeris [JD] 2457128.31066 0.00013 BJD-TDB Kokori et al. 2023

Previously Published Mid-Transit Times

Value Uncertainty Units Reference
2455186.0195066663 0.0004333333333333333 BJD-TDB, BJD-UTC Bonomo et al. 2017, Seeliger et al. 2015, Béky et al. 2011
2455407.9088 0.0002 BJD-UTC Brown et al. 2012
2456018.86487 0.00023 BJD-TDB Ivshina & Winn 2022
2456638.93852 0.00012 BJD-TDB Kokori et al. 2022
2457128.31066 0.00013 BJD-TDB Kokori et al. 2023
2459693.716285 0.00104456 BJD ExoFOP-TESS TOI

Observations

Light curve chart for 0000665
Parameter Value Uncertainty
Am1 0.9999 0.0038
Am2 0.0005 0.0013
a/Rs 9.9 0.18
Rp/Rs 0.131 0.0065
ephemeris [JD] 2459316.80882 0.00087
eccentricity 0.08
inclination [degrees] 84.7
omega [degrees] 63.0
orbital period [days] 3.03957804
u0 1.5872513858965578
u1 -2.714043213055695
u2 3.3138543613380635
u3 -1.187062484798648
duration 0.0684 0.003
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 CMIA (collaborate/publish)
Light curve chart for 0000771
Parameter Value Uncertainty
Am1 0.993 0.012
Am2 0.0043 0.0051
a/Rs 10.05 0.93
Rp/Rs 0.124 0.034
ephemeris [JD] 2459368.4822 0.0059
eccentricity 0.08
inclination [degrees] 84.7
omega [degrees] 63.0
orbital period [days] 3.03957804
u0 1.9642475630032412
u1 -3.4341375338586273
u2 3.814211547183421
u3 -1.3443215194918539
duration 0.065 0.016
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 400.0 nm 900.0 nm
Organization Observer Code Secondary Observers
AAVSO BMAW (collaborate/publish) UNIS
Light curve chart for 0001397
Parameter Value Uncertainty
Am1 0.99 0.01
Am2 0.0057 0.0021
a/Rs 9.95 0.68
Rp/Rs 0.125 0.024
ephemeris [JD] 2459693.7143 0.0036
eccentricity 0.08
inclination [degrees] 84.7
omega [degrees] 63.0
orbital period [days] 3.03957804
u0 2.2263637577007844
u1 -3.8868294566765815
u2 4.088414549859155
u3 -1.4279487899612335
duration 0.066 0.012
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 LDJC (collaborate/publish)
Light curve chart for 0001398
Parameter Value Uncertainty
Am1 0.9695 0.0092
Am2 0.0251 0.0097
a/Rs 8.22 0.7
Rp/Rs 0.179 0.021
ephemeris [JD] 2459693.694 0.0046
eccentricity 0.08
inclination [degrees] 84.7
omega [degrees] 63.0
orbital period [days] 3.03957804
u0 2.452662771341925
u1 -4.287429875772551
u2 4.329413403254161
u3 -1.4946462343102485
duration 0.0461 0.0087
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
AAVSO LPAC (collaborate/publish)
Light curve chart for 0001702
Parameter Value Uncertainty
Am1 1.074 0.013
Am2 -0.026 0.02
a/Rs 8.59 0.96
Rp/Rs 0.22 0.023
ephemeris [JD] 2459775.7675 0.0086
eccentricity 0.08
inclination [degrees] 84.7
omega [degrees] 63.0
orbital period [days] 3.03957804
u0 1.586633949804689
u1 -2.712701254881927
u2 3.312859569083486
u3 -1.1867922146407937
duration 0.0714 0.0044
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 45be05d1f7ee2ca397a0643c88dbefb0
Parameter Value Uncertainty
Am1 1.0004 0.0025
Am2 0
a/Rs 10.05 0.18
Rp/Rs 0.125 0.006
ephemeris [JD] 2459699.79525 0.0009
eccentricity 0.08
inclination [degrees] 84.7
omega [degrees] 63.0
orbital period [days] 3.03957804
u0 2.4534870388910592
u1 -4.288518436323634
u2 4.329766707931549
u3 -1.4947352459804222
duration 0.0651 0.0029
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 7f28552b0d17cb7d43ec5dd1b4072248
Parameter Value Uncertainty
Am1 1.0 0.0027
Am2 0
a/Rs 9.65 0.18
Rp/Rs 0.112 0.0047
ephemeris [JD] 2459693.7143 0.0011
eccentricity 0.08
inclination [degrees] 84.7
omega [degrees] 63.0
orbital period [days] 3.03957804
u0 2.4533055088919444
u1 -4.288007682169136
u2 4.329098823608614
u3 -1.4943965858228236
duration 0.0698 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 ef6cffbd963234528e69ce59e2f611a0
Parameter Value Uncertainty
Am1 1.0005 0.0022
Am2 0
a/Rs 9.54 0.13
Rp/Rs 0.1096 0.003
ephemeris [JD] 2459702.83332 0.00085
eccentricity 0.08
inclination [degrees] 84.7
omega [degrees] 63.0
orbital period [days] 3.03957804
u0 2.452806623034405
u1 -4.287061712590569
u2 4.328460389041356
u3 -1.4942052349861061
duration 0.0712 0.0022
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 fa4aed362ae7d758e3b65824561c86d3
Parameter Value Uncertainty
Am1 0.9991 0.0022
Am2 0
a/Rs 9.75 0.12
Rp/Rs 0.1198 0.0032
ephemeris [JD] 2459705.87192 0.0008
eccentricity 0.08
inclination [degrees] 84.7
omega [degrees] 63.0
orbital period [days] 3.03957804
u0 2.4531192949146443
u1 -4.287683761495438
u2 4.328981985618464
u3 -1.494417454530812
duration 0.0691 0.0021
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 d8c04d4b56aefd43cdccc5bedfe34677
Parameter Value Uncertainty
Am1 1.0006 0.0025
Am2 0
a/Rs 9.82 0.14
Rp/Rs 0.1152 0.0038
ephemeris [JD] 2459714.99014 0.00091
eccentricity 0.08
inclination [degrees] 84.7
omega [degrees] 63.0
orbital period [days] 3.03957804
u0 2.4527052546436905
u1 -4.286766778020775
u2 4.32809448957868
u3 -1.4940329017079619
duration 0.0674 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)