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K2-30 b

View target in exoplanet catalog
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Total Reductions to Date: 12

Date Processed: 09/18/2023 at 00:07:19 (PDT)

Exoplanet Watch Ephemeris

Parameter Value Uncertainty
Orbital Period (Days) 4.0984764805457115 1.2509470489007695e-06
Ephemeris (BJD_TDB) 2459932.7407643353 0.0007997567178714794
Time saved (hours) -  

Assumed Priors

Parameter Value Uncertainty Units Reference
RA 52.3420548 decimal
DEC 22.2993491 decimal
Host Star Metallicity -0.15 0.05 Kokori et al. 2022
Host Star log(g) 4.54 0.03 Log10(cgs) Kokori et al. 2022
Host Star Radius [R_Sun] 0.84 0.03 Sol Kokori et al. 2022
Host Star Effective Temperature [K] 5425.0 40.0 K Kokori et al. 2022
a/Rs 11.24 0.19 Kruse et al. 2019
eccentricity 0.08 0.036 Brahm et al. 2016
inclination [degrees] 86.563 0.404 deg Mayo et al. 2018
omega [degrees] 120.0 100.0 deg Lillo-Box et al. 2016
orbital period [days] 4.0984791 7e-07 day Kokori et al. 2022
Rp 13.14 0.35 R_Earth Kruse et al. 2019
Rp/Rs 0.1308 0 Kruse et al. 2019
ephemeris [JD] 2457395.78391 0.00013 BJD-TDB Kokori et al. 2022

Previously Published Mid-Transit Times

Value Uncertainty Units Reference
2457067.905516667 0.00020466666666666666 BJD, BJD-TDB, nan Mayo et al. 2018, Brahm et al. 2016, Crossfield et al. 2016
2457395.78391 0.00013 BJD-TDB Kokori et al. 2022
2459502.400339 0.000981 BJD ExoFOP-TESS TOI

Observations

Light curve chart for 0003288
Parameter Value Uncertainty
Am1 1.189 0.026
Am2 -0.18 0.19
a/Rs 12.15 0.55
Rp/Rs 0.128 0.039
ephemeris [JD] 2458510.564 0.011
eccentricity 0.08
inclination [degrees] 86.563
omega [degrees] 120.0
orbital period [days] 4.0984791
u0 1.631955577853365
u1 -2.7832354606290113
u2 3.4412055570503908
u3 -1.289925622996786
duration 0.034 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 SGDA (collaborate/publish) MOBS
Light curve chart for 0000235
Parameter Value Uncertainty
Am1 0.13271 0.00074
Am2 -0.014 0.035
a/Rs 12.19 0.68
Rp/Rs 0.125 0.01
ephemeris [JD] 2458793.3703 0.0066
eccentricity 0.08
inclination [degrees] 86.563
omega [degrees] 120.0
orbital period [days] 4.0984791
u0 1.9961642530141415
u1 -3.3946213575167885
u2 3.764042954539449
u3 -1.365585793948191
duration 0.0888 0.0073
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 MNIC (collaborate/publish)
Light curve chart for 0004005
Parameter Value Uncertainty
Am1 1.08 0.024
Am2 -0.027 0.018
a/Rs 10.86 0.53
Rp/Rs 0.257 0.045
ephemeris [JD] 2458805.6609 0.0051
eccentricity 0.08
inclination [degrees] 86.563
omega [degrees] 120.0
orbital period [days] 4.0984791
u0 1.6326075287143862
u1 -2.784981100358187
u2 3.4431017784063056
u3 -1.2907281554562902
duration 0.0938 0.0068
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 PAIB (collaborate/publish) MOBS
Light curve chart for 0004427
Parameter Value Uncertainty
Am1 1.156 0.03
Am2 -0.137 0.068
a/Rs 10.86 0.53
Rp/Rs 0.173 0.03
ephemeris [JD] 2459145.8529 0.0049
eccentricity 0.08
inclination [degrees] 86.563
omega [degrees] 120.0
orbital period [days] 4.0984791
u0 1.6315994707467638
u1 -2.7820203953010694
u2 3.439797165776939
u3 -1.2893761899656613
duration 0.1134 0.0085
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 LELA (collaborate/publish) MOBS
Light curve chart for 0002779
Parameter Value Uncertainty
Am1 0.977 0.028
Am2 0.026 0.026
a/Rs 12.19 0.46
Rp/Rs 0.163 0.037
ephemeris [JD] 2459149.9275 0.0067
eccentricity 0.08
inclination [degrees] 86.563
omega [degrees] 120.0
orbital period [days] 4.0984791
u0 1.6318563279110931
u1 -2.7826613128785396
u2 3.4404962749933676
u3 -1.2896912387585315
duration 0.0943 0.0072
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 GMAI (collaborate/publish) MOBS
Light curve chart for 0004478
Parameter Value Uncertainty
Am1 0.99 0.77
Am2 -0.18 0.2
a/Rs 11.14 0.54
Rp/Rs 0.26 0.074
ephemeris [JD] 2459178.643 0.012
eccentricity 0.08
inclination [degrees] 86.563
omega [degrees] 120.0
orbital period [days] 4.0984791
u0 1.6320707061167203
u1 -2.783560536213869
u2 3.4415003985573747
u3 -1.290010517177874
duration 0.12 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
V Johnson V 502.8 nm 586.8 nm
Organization Observer Code Secondary Observers
AAVSO ADUA (collaborate/publish) MOBS
Light curve chart for 0000937
Parameter Value Uncertainty
Am1 0.9704 0.0046
Am2 0.036 0.012
a/Rs 10.3 0.48
Rp/Rs 0.1379 0.0082
ephemeris [JD] 2459514.685 0.0039
eccentricity 0.08
inclination [degrees] 86.563
omega [degrees] 120.0
orbital period [days] 4.0984791
u0 1.6320035729824411
u1 -2.7834799898857523
u2 3.441565992081116
u3 -1.2900895238944754
duration 0.1037 0.0055
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 KJEB (collaborate/publish)
Light curve chart for 0002108
Parameter Value Uncertainty
Am1 1.0615 0.0059
Am2 -0.054 0.048
a/Rs 12.01 0.23
Rp/Rs 0.1401 0.01
ephemeris [JD] 2459895.8548 0.0018
eccentricity 0.08
inclination [degrees] 86.563
omega [degrees] 120.0
orbital period [days] 4.0984791
u0 2.5463434081771807
u1 -4.5123233462820815
u2 4.560467444396876
u3 -1.594487438335714
duration 0.0939 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
AAVSO LPAC (collaborate/publish)
Light curve chart for 0002226
Parameter Value Uncertainty
Am1 0.988 0.011
Am2 0.0125 0.0083
a/Rs 11.63 0.5
Rp/Rs 0.105 0.015
ephemeris [JD] 2459928.6357 0.0055
eccentricity 0.08
inclination [degrees] 86.563
omega [degrees] 120.0
orbital period [days] 4.0984791
u0 1.6314947358897254
u1 -2.7825344608608584
u2 3.4408312916702037
u3 -1.2897915154266895
duration 0.0915 0.0059
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 0002233
Parameter Value Uncertainty
Am1 0.9451 0.0043
Am2 0.05 0.013
a/Rs 12.01 0.35
Rp/Rs 0.1054 0.0069
ephemeris [JD] 2459932.743 0.0023
eccentricity 0.08
inclination [degrees] 86.563
omega [degrees] 120.0
orbital period [days] 4.0984791
u0 1.918490963775419
u1 -3.401784505474872
u2 3.913047468013343
u3 -1.4297538680049389
duration 0.0892 0.0043
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 MBEB (collaborate/publish)
Light curve chart for 0002394
Parameter Value Uncertainty
Am1 1.487 0.037
Am2 -0.36 0.22
a/Rs 10.32 0.52
Rp/Rs 0.208 0.061
ephemeris [JD] 2459969.6095 0.007
eccentricity 0.08
inclination [degrees] 86.563
omega [degrees] 120.0
orbital period [days] 4.0984791
u0 1.918418525215044
u1 -3.40180559983546
u2 3.9131046567029766
u3 -1.4297175237727573
duration 0.0981 0.0092
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 OAS (collaborate/publish) MOBS
Light curve chart for 0004400
Parameter Value Uncertainty
Am1 1.058 0.047
Am2 -0.044 0.063
a/Rs 12.17 0.56
Rp/Rs 0.079 0.051
ephemeris [JD] 2460190.961 0.012
eccentricity 0.08
inclination [degrees] 86.563
omega [degrees] 120.0
orbital period [days] 4.0984791
u0 1.631798081648618
u1 -2.783519155075137
u2 3.441896809358476
u3 -1.2901756846436978
duration 0.0811 0.0092
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 CPHB (collaborate/publish) MOBS

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