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WASP-21 b

View target in exoplanet catalog
Timing Plot
Global Light Curve

Total Reductions to Date: 9

Date Processed: 09/24/2023 at 00:07:22 (PDT)

Exoplanet Watch Ephemeris

Parameter Value Uncertainty
Orbital Period (Days) 4.322793655939389 1.888227337474509e-07
Ephemeris (BJD_TDB) 2460193.793066306 2.211340000156285e-06
Time saved (hours) 0.0013  

Assumed Priors

Parameter Value Uncertainty Units Reference
RA 347.4928024 decimal
DEC 18.3961597 decimal
Host Star Metallicity -0.46 0.11 Chen et al. 2020
Host Star log(g) 4.28 0.03 Log10(cgs) Chen et al. 2020
Host Star Radius [R_Sun] 1.14 0.05 Sol Chen et al. 2020
Host Star Effective Temperature [K] 5800.0 100.0 K Chen et al. 2020
a/Rs 10.23 0.36 Chen et al. 2020
eccentricity 0.048 Bonomo et al. 2017
inclination [degrees] 88.28 0.9 deg Chen et al. 2020
omega [degrees] 0.0 deg Ivshina & Winn 2022
orbital period [days] 4.3225065 2.3e-06 day Ivshina & Winn 2022
Rp 12.89 0.11 R_Earth Alderson et al. 2020
Rp/Rs 0.1093 0 ExoFOP-TESS TOI
ephemeris [JD] 2456558.49577 0.0006 BJD-TDB Ivshina & Winn 2022

Previously Published Mid-Transit Times

Value Uncertainty Units Reference
2454743.0415366665 0.0010666666666666665 BJD-TDB, HJD Bonomo et al. 2017, Seeliger et al. 2015, Bouchy et al. 2010
2456181.93874 0.00031 BJD-TDB Chen et al. 2020
2456558.49577 0.0006 BJD-TDB Ivshina & Winn 2022
2457660.73516 0.00016 BJD-TDB Kokori et al. 2022
2459826.311145 0.000432 BJD ExoFOP-TESS TOI

Observations

Light curve chart for 0000481
Parameter Value Uncertainty
Am1 1.1149 0.0093
Am2 0.034 0.013
a/Rs 8.43 0.73
Rp/Rs 0.0939 0.0043
ephemeris [JD] 2459095.7943 0.0071
eccentricity 0.048
inclination [degrees] 88.28
omega [degrees] 0.0
orbital period [days] 4.3225065
u0 2.1564095820659928
u1 -3.6993861591590704
u2 4.002738459469234
u3 -1.459761822730706
duration 0.165 0.011
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 JBEB (collaborate/publish)
Light curve chart for 0004061
Parameter Value Uncertainty
Am1 0.999 0.0035
Am2 0.0008 0.0012
a/Rs 10.08 0.3
Rp/Rs 0.1074 0.0038
ephemeris [JD] 2460141.8519 0.0021
eccentricity 0.048
inclination [degrees] 88.28
omega [degrees] 0.0
orbital period [days] 4.3225065
u0 2.43477015120159
u1 -4.284448358130969
u2 4.43129211726318
u3 -1.5816138443024026
duration 0.1458 0.0046
Included in ephemeris calculations
Light Curve ( PNG, PDF - high resolution )
Posteriors ( PNG, PDF - high resolution )
Observation Data ( JSON )
Filter Detail Min Max
RJ Johnson R 590.0 nm 810.0 nm
Organization Observer Code Secondary Observers
AAVSO MBEB (collaborate/publish)
Light curve chart for 0004443
Parameter Value Uncertainty
Am1 0.9982 0.0035
Am2 0.0014 0.0015
a/Rs 10.6 0.25
Rp/Rs 0.1103 0.0037
ephemeris [JD] 2460193.7265 0.0016
eccentricity 0.048
inclination [degrees] 88.28
omega [degrees] 0.0
orbital period [days] 4.3225065
u0 2.4343826476428134
u1 -4.283592198007604
u2 4.430577473103542
u3 -1.5813678567180016
duration 0.138 0.0037
Included in ephemeris calculations
Light Curve ( PNG, PDF - high resolution )
Posteriors ( PNG, PDF - high resolution )
Observation Data ( JSON )
Filter Detail Min Max
RJ Johnson R 590.0 nm 810.0 nm
Organization Observer Code Secondary Observers
AAVSO MBEB (collaborate/publish)
Light curve chart for f4f1eb4dcbe4d1eaf6475eaa8e698241
Parameter Value Uncertainty
Am1 0.9999 0.0038
Am2 0
a/Rs 10.509 0.1
Rp/Rs 0.10112 0.001
ephemeris [JD] 2459830.6331 0.00061
eccentricity 0.048
inclination [degrees] 88.28
omega [degrees] 0.0
orbital period [days] 4.3225065
u0 2.7635293382504895
u1 -4.97623823953795
u2 4.9389018155354005
u3 -1.7261928406525686
duration 0.138 0.0015
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 11d0cd4a8b62fd78af99a8d776ec6c14
Parameter Value Uncertainty
Am1 1.0005 0.0038
Am2 0
a/Rs 10.254 0.091
Rp/Rs 0.1039 0.001
ephemeris [JD] 2459839.27875 0.00058
eccentricity 0.048
inclination [degrees] 88.28
omega [degrees] 0.0
orbital period [days] 4.3225065
u0 2.7642441982453603
u1 -4.9794080588792875
u2 4.943097861350566
u3 -1.727933927058741
duration 0.1426 0.0014
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 ee75aaab2e1769117c7653078f09c55e
Parameter Value Uncertainty
Am1 1.0 0.0038
Am2 0
a/Rs 10.337 0.1
Rp/Rs 0.1021 0.0011
ephemeris [JD] 2459847.92366 0.00062
eccentricity 0.048
inclination [degrees] 88.28
omega [degrees] 0.0
orbital period [days] 4.3225065
u0 2.764704786649385
u1 -4.980600049394679
u2 4.944262806403035
u3 -1.7283674699824836
duration 0.1409 0.0015
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 e5bd31b5cb3b99b27b840024763e3b5a
Parameter Value Uncertainty
Am1 1.0 0.0037
Am2 0
a/Rs 10.51 0.11
Rp/Rs 0.1019 0.001
ephemeris [JD] 2459843.6015 0.00064
eccentricity 0.048
inclination [degrees] 88.28
omega [degrees] 0.0
orbital period [days] 4.3225065
u0 2.734694232154826
u1 -4.878802547254225
u2 4.824755456803976
u3 -1.6806470698101172
duration 0.1386 0.0017
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 abc5558aece4acccb54c49c278e070cb
Parameter Value Uncertainty
Am1 1.0005 0.0038
Am2 0
a/Rs 10.382 0.099
Rp/Rs 0.1036 0.0011
ephemeris [JD] 2459852.24706 0.00062
eccentricity 0.048
inclination [degrees] 88.28
omega [degrees] 0.0
orbital period [days] 4.3225065
u0 2.764454247904286
u1 -4.980589287811167
u2 4.944793559995964
u3 -1.7286584464059178
duration 0.1403 0.0015
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 6fd7d56f6a08e3c5c7500da1aed05869
Parameter Value Uncertainty
Am1 1.0002 0.0037
Am2 0
a/Rs 10.583 0.095
Rp/Rs 0.1035 0.001
ephemeris [JD] 2459826.31163 0.00058
eccentricity 0.048
inclination [degrees] 88.28
omega [degrees] 0.0
orbital period [days] 4.3225065
u0 2.734402211125298
u1 -4.878517553125344
u2 4.824830292884095
u3 -1.680714878988475
duration 0.1375 0.0014
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)

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