results
Qatar-7 b


Total Reductions to Date: 15
Date Processed: 09/24/2023 at 00:07:22 (PDT)
Exoplanet Watch Ephemeris
Parameter | Value | Uncertainty |
---|---|---|
Orbital Period (Days) | 2.0320453972687234 | 1.6833178028242937e-07 |
Ephemeris (BJD_TDB) | 2459880.2898925915 | 8.676503807771829e-05 |
Time saved (hours) | 0.0158 |
Assumed Priors
Parameter | Value | Uncertainty | Units | Reference |
---|---|---|---|---|
RA | 358.5151344 | decimal | ||
DEC | 37.0218242 | decimal | ||
Host Star Metallicity | 0.276 | 0.071 | Alsubai et al. 2019 | |
Host Star log(g) | 4.2 | 0.03 | Log10(cgs) | Alsubai et al. 2019 |
Host Star Radius [R_Sun] | 1.56 | 0.02 | Sol | Alsubai et al. 2019 |
Host Star Effective Temperature [K] | 6387.0 | 38.0 | K | Alsubai et al. 2019 |
a/Rs | 4.84 | 0.05 | Alsubai et al. 2019 | |
eccentricity | 0.0 | Alsubai et al. 2019 | ||
inclination [degrees] | 89.0 | 1.0 | deg | Alsubai et al. 2019 |
omega [degrees] | 0.0 | deg | Ivshina & Winn 2022 | |
orbital period [days] | 2.032069 | 1.8e-05 | day | Ivshina & Winn 2022 |
Rp | 19.06 | 0.34 | R_Earth | Alsubai et al. 2019 |
Rp/Rs | 0.1108 | 0 | ExoFOP-TESS TOI | |
ephemeris [JD] | 2458063.64145 | 0.00018 | BJD-TDB | Ivshina & Winn 2022 |
Previously Published Mid-Transit Times
Value | Uncertainty | Units | Reference |
---|---|---|---|
2458063.64145 | 0.00018 | BJD-TDB | Ivshina & Winn 2022 |
2458043.32075 | 0.00016 | Alsubai et al. 2019 | |
2459853.85413 | 0.00074 | BJD | ExoFOP-TESS TOI |
Observations

Parameter | Value | Uncertainty |
---|---|---|
Am1 | 1.0139 | 0.0088 |
Am2 | -0.016 | 0.02 |
a/Rs | 4.59 | 0.14 |
Rp/Rs | 0.097 | 0.026 |
ephemeris [JD] | 2459530.7745 | 0.0081 |
eccentricity | 0.0 | |
inclination [degrees] | 89.0 | |
omega [degrees] | 0.0 | |
orbital period [days] | 2.032069 | |
u0 | 2.550261931797471 | |
u1 | -4.55457508189145 | |
u2 | 4.646301796046459 | |
u3 | -1.6419885767171882 | |
duration | 0.0909 | 0.0087 |
Not included in ephemeris calculations
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 | LPAC (collaborate/publish) |

Parameter | Value | Uncertainty |
---|---|---|
Am1 | 0.9962 | 0.0068 |
Am2 | 0.0014 | 0.0023 |
a/Rs | 5.08 | 0.13 |
Rp/Rs | 0.1005 | 0.0064 |
ephemeris [JD] | 2459788.84721 | 0.00071 |
eccentricity | 0.0 | |
inclination [degrees] | 89.0 | |
omega [degrees] | 0.0 | |
orbital period [days] | 2.032069 | |
u0 | 2.149664700288578 | |
u1 | -3.9038071824708362 | |
u2 | 4.369134950259051 | |
u3 | -1.614992402971608 | |
duration | 0.1408 | 0.0038 |
Included in ephemeris calculations
Posteriors ( PNG, PDF - high resolution )
Observation Data ( JSON )
Filter | Detail | Min | Max |
---|---|---|---|
CV | Clear (unfiltered) reduced to V sequence | 350.0 nm | 850.0 nm |
Organization | Observer Code | Secondary Observers |
---|---|---|
AAVSO | MBEB (collaborate/publish) |

Parameter | Value | Uncertainty |
---|---|---|
Am1 | 0.5689 | 0.0078 |
Am2 | 0.56 | 0.12 |
a/Rs | 4.59 | 0.14 |
Rp/Rs | 0.197 | 0.018 |
ephemeris [JD] | 2459847.7997 | 0.0068 |
eccentricity | 0.0 | |
inclination [degrees] | 89.0 | |
omega [degrees] | 0.0 | |
orbital period [days] | 2.032069 | |
u0 | 2.1491150866535045 | |
u1 | -3.9012269878374894 | |
u2 | 4.365639260527291 | |
u3 | -1.6135272942902117 | |
duration | 0.0778 | 0.0071 |
Included in ephemeris calculations
Posteriors ( PNG, PDF - high resolution )
Observation Data ( JSON )
Filter | Detail | Min | Max |
---|---|---|---|
CV | Clear (unfiltered) reduced to V sequence | 350.0 nm | 850.0 nm |
Organization | Observer Code | Secondary Observers |
---|---|---|
AAVSO | NANF (collaborate/publish) |

Parameter | Value | Uncertainty |
---|---|---|
Am1 | 0.9999 | 0.0038 |
Am2 | 0 | |
a/Rs | 4.81 | 0.13 |
Rp/Rs | 0.0869 | 0.0025 |
ephemeris [JD] | 2459876.22617 | 0.00026 |
eccentricity | 0.0 | |
inclination [degrees] | 89.0 | |
omega [degrees] | 0.0 | |
orbital period [days] | 2.032069 | |
u0 | 2.8430685916959937 | |
u1 | -5.068794037731132 | |
u2 | 4.910369922154414 | |
u3 | -1.6846444029490626 | |
duration | 0.1469 | 0.004 |
Included in ephemeris calculations
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) |

Parameter | Value | Uncertainty |
---|---|---|
Am1 | 0.9998 | 0.0038 |
Am2 | 0 | |
a/Rs | 4.59 | 0.13 |
Rp/Rs | 0.0891 | 0.0027 |
ephemeris [JD] | 2459874.1941 | 0.00034 |
eccentricity | 0.0 | |
inclination [degrees] | 89.0 | |
omega [degrees] | 0.0 | |
orbital period [days] | 2.032069 | |
u0 | 2.843656808410161 | |
u1 | -5.071254239113714 | |
u2 | 4.913498130472707 | |
u3 | -1.6859006265523258 | |
duration | 0.1548 | 0.0045 |
Included in ephemeris calculations
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) |

Parameter | Value | Uncertainty |
---|---|---|
Am1 | 0.9999 | 0.0038 |
Am2 | 0 | |
a/Rs | 4.59 | 0.055 |
Rp/Rs | 0.0874 | 0.003 |
ephemeris [JD] | 2459859.96961 | 0.00029 |
eccentricity | 0.0 | |
inclination [degrees] | 89.0 | |
omega [degrees] | 0.0 | |
orbital period [days] | 2.032069 | |
u0 | 2.844395266530767 | |
u1 | -5.074669419580251 | |
u2 | 4.918141635871503 | |
u3 | -1.6878674095359987 | |
duration | 0.154 | 0.0019 |
Included in ephemeris calculations
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) |

Parameter | Value | Uncertainty |
---|---|---|
Am1 | 1.0004 | 0.0039 |
Am2 | 0 | |
a/Rs | 4.59 | 0.1 |
Rp/Rs | 0.0918 | 0.0024 |
ephemeris [JD] | 2459853.87341 | 0.00032 |
eccentricity | 0.0 | |
inclination [degrees] | 89.0 | |
omega [degrees] | 0.0 | |
orbital period [days] | 2.032069 | |
u0 | 2.843214823024895 | |
u1 | -5.069503547042729 | |
u2 | 4.9112866095319525 | |
u3 | -1.684997812330244 | |
duration | 0.1548 | 0.0035 |
Included in ephemeris calculations
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) |

Parameter | Value | Uncertainty |
---|---|---|
Am1 | 0.9998 | 0.0039 |
Am2 | 0 | |
a/Rs | 4.91 | 0.13 |
Rp/Rs | 0.0883 | 0.0026 |
ephemeris [JD] | 2459880.2903 | 0.00032 |
eccentricity | 0.0 | |
inclination [degrees] | 89.0 | |
omega [degrees] | 0.0 | |
orbital period [days] | 2.032069 | |
u0 | 2.8446139082093453 | |
u1 | -5.075092491548903 | |
u2 | 4.918378264233158 | |
u3 | -1.6878996076040536 | |
duration | 0.1445 | 0.004 |
Included in ephemeris calculations
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) |

Parameter | Value | Uncertainty |
---|---|---|
Am1 | 0.9999 | 0.0038 |
Am2 | 0 | |
a/Rs | 4.78 | 0.12 |
Rp/Rs | 0.089 | 0.0025 |
ephemeris [JD] | 2459862.00168 | 0.00026 |
eccentricity | 0.0 | |
inclination [degrees] | 89.0 | |
omega [degrees] | 0.0 | |
orbital period [days] | 2.032069 | |
u0 | 2.843828193627784 | |
u1 | -5.071906567984196 | |
u2 | 4.914300297819579 | |
u3 | -1.6862218502343862 | |
duration | 0.1485 | 0.0037 |
Included in ephemeris calculations
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) |

Parameter | Value | Uncertainty |
---|---|---|
Am1 | 1.0001 | 0.004 |
Am2 | 0 | |
a/Rs | 4.72 | 0.13 |
Rp/Rs | 0.0894 | 0.0027 |
ephemeris [JD] | 2459872.16203 | 0.00032 |
eccentricity | 0.0 | |
inclination [degrees] | 89.0 | |
omega [degrees] | 0.0 | |
orbital period [days] | 2.032069 | |
u0 | 2.845630963360429 | |
u1 | -5.07933318048996 | |
u2 | 4.9239982089434555 | |
u3 | -1.690295918440634 | |
duration | 0.15 | 0.0044 |
Included in ephemeris calculations
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) |

Parameter | Value | Uncertainty |
---|---|---|
Am1 | 1.0006 | 0.0041 |
Am2 | 0 | |
a/Rs | 4.594 | 0.096 |
Rp/Rs | 0.0896 | 0.0028 |
ephemeris [JD] | 2459857.93755 | 0.00038 |
eccentricity | 0.0 | |
inclination [degrees] | 89.0 | |
omega [degrees] | 0.0 | |
orbital period [days] | 2.032069 | |
u0 | 2.843119595251862 | |
u1 | -5.069393829359529 | |
u2 | 4.911330085026146 | |
u3 | -1.6850557777339579 | |
duration | 0.1548 | 0.0033 |
Included in ephemeris calculations
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) |

Parameter | Value | Uncertainty |
---|---|---|
Am1 | 0.9998 | 0.004 |
Am2 | 0 | |
a/Rs | 4.591 | 0.095 |
Rp/Rs | 0.0877 | 0.0025 |
ephemeris [JD] | 2459878.25824 | 0.00029 |
eccentricity | 0.0 | |
inclination [degrees] | 89.0 | |
omega [degrees] | 0.0 | |
orbital period [days] | 2.032069 | |
u0 | 2.8431618581737492 | |
u1 | -5.069348271691852 | |
u2 | 4.911094626349453 | |
u3 | -1.6849081396503367 | |
duration | 0.1548 | 0.0032 |
Included in ephemeris calculations
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) |

Parameter | Value | Uncertainty |
---|---|---|
Am1 | 1.0001 | 0.0038 |
Am2 | 0 | |
a/Rs | 4.592 | 0.093 |
Rp/Rs | 0.0973 | 0.0027 |
ephemeris [JD] | 2459855.90548 | 0.00031 |
eccentricity | 0.0 | |
inclination [degrees] | 89.0 | |
omega [degrees] | 0.0 | |
orbital period [days] | 2.032069 | |
u0 | 2.845191472573473 | |
u1 | -5.078068658393125 | |
u2 | 4.922716841860723 | |
u3 | -1.6898395826868735 | |
duration | 0.1556 | 0.0033 |
Included in ephemeris calculations
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) |

Parameter | Value | Uncertainty |
---|---|---|
Am1 | 1.0004 | 0.004 |
Am2 | 0 | |
a/Rs | 4.591 | 0.097 |
Rp/Rs | 0.0891 | 0.0026 |
ephemeris [JD] | 2459868.09789 | 0.00028 |
eccentricity | 0.0 | |
inclination [degrees] | 89.0 | |
omega [degrees] | 0.0 | |
orbital period [days] | 2.032069 | |
u0 | 2.844825349020332 | |
u1 | -5.076170550989697 | |
u2 | 4.920001815904635 | |
u3 | -1.6886565406215297 | |
duration | 0.155 | 0.0034 |
Included in ephemeris calculations
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) |

Parameter | Value | Uncertainty |
---|---|---|
Am1 | 0.9999 | 0.0039 |
Am2 | 0 | |
a/Rs | 5.09 | 0.12 |
Rp/Rs | 0.0909 | 0.0025 |
ephemeris [JD] | 2459870.12996 | 0.0003 |
eccentricity | 0.0 | |
inclination [degrees] | 89.0 | |
omega [degrees] | 0.0 | |
orbital period [days] | 2.032069 | |
u0 | 2.844065609146864 | |
u1 | -5.07313372027362 | |
u2 | 4.916098289289564 | |
u3 | -1.687030104907235 | |
duration | 0.1392 | 0.0034 |
Included in ephemeris calculations
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) |