results

Qatar-8 b

Timing Plot

Total Reductions to Date: 25

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

Exoplanet Watch Ephemeris

Parameter Value Uncertainty
Orbital Period (Days) 3.7146475176395586 1.1065887229178363e-06
Ephemeris (BJD_TDB) 2459696.698126446 0.00017188709708091345
Time saved (hours) -  

Assumed Priors

Parameter Value Uncertainty Units Reference
RA 157.4123405 decimal
DEC 70.5270835 decimal
Host Star Metallicity 0.025 0.071 Kokori et al. 2023
Host Star log(g) 4.214 0.016 Log10(cgs) Kokori et al. 2023
Host Star Radius [R_Sun] 1.315 0.02 Sol Kokori et al. 2023
Host Star Effective Temperature [K] 5738.0 51.0 K Kokori et al. 2023
a/Rs 6.39 0.05 Kokori et al. 2023
eccentricity 0.0 Alsubai et al. 2019
inclination [degrees] 84.6 1.3 deg Kokori et al. 2023
omega [degrees] 0.0 deg Kokori et al. 2023
orbital period [days] 3.7146458 2.9e-06 day Kokori et al. 2023
Rp 14.4 0.25 R_Earth Alsubai et al. 2019
Rp/Rs 0.1014 0 Maciejewski 2020
ephemeris [JD] 2459362.37977 0.0002 BJD-TDB Kokori et al. 2023

Previously Published Mid-Transit Times

Value Uncertainty Units Reference
2458210.8395 0.000925 BJD-TDB, nan Maciejewski 2020, Alsubai et al. 2019
2458846.04383 0.00016 BJD-TDB Ivshina & Winn 2022
2459362.37977 0.0002 BJD-TDB Kokori et al. 2023
2459600.117319 0.0002187 BJD ExoFOP-TESS TOI

Observations

Light curve chart for 0010408
Parameter Value Uncertainty
Am1 1.0333 0.0082
Am2 -0.0207 0.0083
a/Rs 6.64 0.14
Rp/Rs 0.1178 0.0089
ephemeris [JD] 2458890.6279 0.0036
eccentricity 0.0
inclination [degrees] 84.6
omega [degrees] 0.0
orbital period [days] 3.7146458
u0 2.0807425732130844
u1 -3.7737093276589215
u2 4.244113563525745
u3 -1.5511467458376873
duration 0.1403 0.0043
Included in ephemeris calculations
Light Curve ( PNG, PDF - high resolution )
Posteriors ( PNG, PDF - high resolution )
Observation Data ( JSON )
Filter Detail Min Max
N/A PanSTARRS w 404.2 nm 845.8 nm
Organization Observer Code Secondary Observers
AAVSO JDOC (collaborate/publish) LCO
Light curve chart for 0005164
Parameter Value Uncertainty
Am1 0.9021 0.0095
Am2 0.071 0.015
a/Rs 6.4 0.14
Rp/Rs 0.079 0.021
ephemeris [JD] 2459629.8318 0.0091
eccentricity 0.0
inclination [degrees] 84.6
omega [degrees] 0.0
orbital period [days] 3.7146458
u0 2.1546987507420865
u1 -3.9284153882407615
u2 4.360413996631859
u3 -1.5866972941579518
duration 0.1666 0.0073
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 PMIF (collaborate/publish) UNIS
Light curve chart for 0001365
Parameter Value Uncertainty
Am1 0.9906 0.0073
Am2 0.0079 0.0046
a/Rs 6.141 0.061
Rp/Rs 0.118 0.0047
ephemeris [JD] 2459681.8419 0.0024
eccentricity 0.0
inclination [degrees] 84.6
omega [degrees] 0.0
orbital period [days] 3.7146458
u0 2.105756710740722
u1 -3.696086660561643
u2 4.06352137442502
u3 -1.4731913640529113
duration 0.1856 0.0027
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 MAEB (collaborate/publish)
Light curve chart for 0001409
Parameter Value Uncertainty
Am1 0.975 0.0049
Am2 0.0152 0.005
a/Rs 6.14 0.12
Rp/Rs 0.082 0.01
ephemeris [JD] 2459696.6977 0.004
eccentricity 0.0
inclination [degrees] 84.6
omega [degrees] 0.0
orbital period [days] 3.7146458
u0 2.7006313547880167
u1 -4.883551741922685
u2 4.883626218445628
u3 -1.7007057585392586
duration 0.1709 0.0046
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 RWEA (collaborate/publish)
Light curve chart for 254ddfe46646392be2d7cbef66e7944f
Parameter Value Uncertainty
Am1 1.0003 0.0017
Am2 0
a/Rs 6.392 0.063
Rp/Rs 0.1039 0.0016
ephemeris [JD] 2459406.9553 0.001
eccentricity 0.0
inclination [degrees] 84.6
omega [degrees] 0.0
orbital period [days] 3.7146458
u0 2.701255572374646
u1 -4.885351020378212
u2 4.885581381975463
u3 -1.7014858611710615
duration 0.1724 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)
Light curve chart for 16f3aa1367247d5a1bb627375f324dab
Parameter Value Uncertainty
Am1 1.0 0.0018
Am2 0
a/Rs 6.46 0.067
Rp/Rs 0.1003 0.0016
ephemeris [JD] 2459429.2442 0.0011
eccentricity 0.0
inclination [degrees] 84.6
omega [degrees] 0.0
orbital period [days] 3.7146458
u0 2.700509883296731
u1 -4.882920974347374
u2 4.882693314810719
u3 -1.700282151002276
duration 0.1691 0.0025
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 04782e9d40e3f0033cec2a184514dfd3
Parameter Value Uncertainty
Am1 1.0 0.0016
Am2 0
a/Rs 6.292 0.065
Rp/Rs 0.1041 0.0016
ephemeris [JD] 2459414.3847 0.0011
eccentricity 0.0
inclination [degrees] 84.6
omega [degrees] 0.0
orbital period [days] 3.7146458
u0 2.701165137615155
u1 -4.885100907237353
u2 4.8853284757970945
u3 -1.701392633377829
duration 0.1764 0.0027
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 0f29590c3a1e9fdd0837100cc70e359c
Parameter Value Uncertainty
Am1 1.0 0.0016
Am2 0
a/Rs 6.417 0.066
Rp/Rs 0.103 0.0016
ephemeris [JD] 2459596.4026 0.0011
eccentricity 0.0
inclination [degrees] 84.6
omega [degrees] 0.0
orbital period [days] 3.7146458
u0 2.70126908249642
u1 -4.8857296085482185
u2 4.886243234307591
u3 -1.701782635445095
duration 0.1712 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)
Light curve chart for 7fb01978fc3b8d810cc4ca8f9dd4b31e
Parameter Value Uncertainty
Am1 0.9997 0.0016
Am2 0
a/Rs 6.444 0.065
Rp/Rs 0.1056 0.0016
ephemeris [JD] 2459600.1173 0.0011
eccentricity 0.0
inclination [degrees] 84.6
omega [degrees] 0.0
orbital period [days] 3.7146458
u0 2.7010181271002733
u1 -4.884695533542017
u2 4.884876780622742
u3 -1.701199301390662
duration 0.1712 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)
Light curve chart for 6c109e951de36c5b7c2edc8a331be450
Parameter Value Uncertainty
Am1 0.9998 0.0018
Am2 0
a/Rs 6.441 0.066
Rp/Rs 0.1039 0.0017
ephemeris [JD] 2459410.6691 0.0011
eccentricity 0.0
inclination [degrees] 84.6
omega [degrees] 0.0
orbital period [days] 3.7146458
u0 2.7000819809175267
u1 -4.881559172922168
u2 4.881112905222706
u3 -1.6996356404838142
duration 0.1711 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)
Light curve chart for ba9955f9b82cc35f6acbe7eb57d30fce
Parameter Value Uncertainty
Am1 0.9996 0.0019
Am2 0
a/Rs 6.451 0.067
Rp/Rs 0.1054 0.0017
ephemeris [JD] 2459425.5291 0.0012
eccentricity 0.0
inclination [degrees] 84.6
omega [degrees] 0.0
orbital period [days] 3.7146458
u0 2.7004560869646594
u1 -4.88276847779365
u2 4.882544981156964
u3 -1.700232517572383
duration 0.1705 0.0025
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 f297951d48516c65ffb8854ed20f2b94
Parameter Value Uncertainty
Am1 1.0002 0.0017
Am2 0
a/Rs 6.436 0.075
Rp/Rs 0.105 0.0018
ephemeris [JD] 2459440.3873 0.0012
eccentricity 0.0
inclination [degrees] 84.6
omega [degrees] 0.0
orbital period [days] 3.7146458
u0 2.7012038204321906
u1 -4.885080348055214
u2 4.88523009118036
u3 -1.701353490761735
duration 0.1712 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 07c57f7bab4baaffd7933491025c3456
Parameter Value Uncertainty
Am1 0.9999 0.0015
Am2 0
a/Rs 6.343 0.068
Rp/Rs 0.1022 0.0016
ephemeris [JD] 2459581.5445 0.0011
eccentricity 0.0
inclination [degrees] 84.6
omega [degrees] 0.0
orbital period [days] 3.7146458
u0 2.7007372186008087
u1 -4.88435936911705
u2 4.884854318995668
u3 -1.7012320956894253
duration 0.1743 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 3d870e4c72f2156a9d5ea5b935072eb8
Parameter Value Uncertainty
Am1 1.0 0.0016
Am2 0
a/Rs 6.412 0.069
Rp/Rs 0.1058 0.0017
ephemeris [JD] 2459603.8321 0.0011
eccentricity 0.0
inclination [degrees] 84.6
omega [degrees] 0.0
orbital period [days] 3.7146458
u0 2.7012169898821563
u1 -4.885548436591493
u2 4.886015878612236
u3 -1.701684359095589
duration 0.1724 0.0027
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 7d484defcf6beadf79b91ed090c0a718
Parameter Value Uncertainty
Am1 1.0 0.0019
Am2 0
a/Rs 6.385 0.071
Rp/Rs 0.1044 0.0018
ephemeris [JD] 2459421.815 0.0012
eccentricity 0.0
inclination [degrees] 84.6
omega [degrees] 0.0
orbital period [days] 3.7146458
u0 2.7009755140167666
u1 -4.884719933345889
u2 4.885020814074184
u3 -1.7012763219525784
duration 0.173 0.0027
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 2af18d8a0c761a41cff7eeb4bff85c4f
Parameter Value Uncertainty
Am1 0.9996 0.0015
Am2 0
a/Rs 6.406 0.066
Rp/Rs 0.1049 0.0016
ephemeris [JD] 2459444.1026 0.0011
eccentricity 0.0
inclination [degrees] 84.6
omega [degrees] 0.0
orbital period [days] 3.7146458
u0 2.7006704773635604
u1 -4.883610570981057
u2 4.883621758870639
u3 -1.7006815924815073
duration 0.1722 0.0025
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 004c8c4ba8d318f02f48a55d4a6a26ac
Parameter Value Uncertainty
Am1 0.9996 0.0016
Am2 0
a/Rs 6.446 0.068
Rp/Rs 0.1051 0.0017
ephemeris [JD] 2459418.0996 0.0011
eccentricity 0.0
inclination [degrees] 84.6
omega [degrees] 0.0
orbital period [days] 3.7146458
u0 2.701178886593206
u1 -4.8852337520121285
u2 4.885517016840902
u3 -1.7014620786221024
duration 0.1709 0.0027
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 6720c16f53533a6640f7d5445161e5a5
Parameter Value Uncertainty
Am1 0.9996 0.0016
Am2 0
a/Rs 6.42 0.069
Rp/Rs 0.1045 0.0016
ephemeris [JD] 2459403.2406 0.0011
eccentricity 0.0
inclination [degrees] 84.6
omega [degrees] 0.0
orbital period [days] 3.7146458
u0 2.7009738983486646
u1 -4.884521959058701
u2 4.884683694072189
u3 -1.7011355605746927
duration 0.1718 0.0027
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 df1cc6e2c18b4e27f06150331ff90167
Parameter Value Uncertainty
Am1 0.9999 0.002
Am2 0
a/Rs 6.36 0.075
Rp/Rs 0.103 0.0018
ephemeris [JD] 2459436.6735 0.0013
eccentricity 0.0
inclination [degrees] 84.6
omega [degrees] 0.0
orbital period [days] 3.7146458
u0 2.700814052717622
u1 -4.884116788338036
u2 4.88425991875026
u3 -1.700957110348702
duration 0.1736 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 39475a8d68ddd19148e98f4e01edfc46
Parameter Value Uncertainty
Am1 1.0001 0.0017
Am2 0
a/Rs 6.412 0.065
Rp/Rs 0.1059 0.0017
ephemeris [JD] 2459395.811 0.0011
eccentricity 0.0
inclination [degrees] 84.6
omega [degrees] 0.0
orbital period [days] 3.7146458
u0 2.700672709131292
u1 -4.883982752892363
u2 4.884291140996019
u3 -1.7009810244533372
duration 0.1721 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)
Light curve chart for eea9a645565feffcb2f14f9cc912b228
Parameter Value Uncertainty
Am1 1.0001 0.0016
Am2 0
a/Rs 6.336 0.067
Rp/Rs 0.1036 0.0016
ephemeris [JD] 2459392.0976 0.0011
eccentricity 0.0
inclination [degrees] 84.6
omega [degrees] 0.0
orbital period [days] 3.7146458
u0 2.7012452363313404
u1 -4.8853635681393905
u2 4.885645938746968
u3 -1.7015275341371208
duration 0.1746 0.0027
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 410c5e5d1f7487d9ce4f194f716af338
Parameter Value Uncertainty
Am1 0.9999 0.0016
Am2 0
a/Rs 6.382 0.069
Rp/Rs 0.1057 0.0017
ephemeris [JD] 2459592.6882 0.0012
eccentricity 0.0
inclination [degrees] 84.6
omega [degrees] 0.0
orbital period [days] 3.7146458
u0 2.7009074135352784
u1 -4.884535752865019
u2 4.8848223054792195
u3 -1.7011938933599544
duration 0.1731 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 ff94c7f6a5bfe0746019332b7fbd157a
Parameter Value Uncertainty
Am1 1.0 0.0016
Am2 0
a/Rs 6.363 0.066
Rp/Rs 0.1039 0.0016
ephemeris [JD] 2459588.9735 0.0011
eccentricity 0.0
inclination [degrees] 84.6
omega [degrees] 0.0
orbital period [days] 3.7146458
u0 2.700396584966207
u1 -4.882654207946005
u2 4.8824467340627455
u3 -1.7001890383288214
duration 0.1736 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)
Light curve chart for 92c06c7a8e62295a55ef5efe324ef440
Parameter Value Uncertainty
Am1 1.0 0.0017
Am2 0
a/Rs 6.373 0.072
Rp/Rs 0.1042 0.0016
ephemeris [JD] 2459399.5258 0.0012
eccentricity 0.0
inclination [degrees] 84.6
omega [degrees] 0.0
orbital period [days] 3.7146458
u0 2.700947212172624
u1 -4.884860946769644
u2 4.885356238028931
u3 -1.70144243063443
duration 0.1734 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 8f9c8e3eb5b43c586eddabea6a1b0e67
Parameter Value Uncertainty
Am1 0.9999 0.0016
Am2 0
a/Rs 6.409 0.067
Rp/Rs 0.1031 0.0016
ephemeris [JD] 2459585.2587 0.0011
eccentricity 0.0
inclination [degrees] 84.6
omega [degrees] 0.0
orbital period [days] 3.7146458
u0 2.7010369848821547
u1 -4.8846843293807005
u2 4.884803924166108
u3 -1.7011565068783119
duration 0.1718 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)