results
GJ 436 b
Total Reductions to Date: 4
Date Processed: 09/18/2023 at 00:07:19 (PDT)
Exoplanet Watch Ephemeris
| Parameter | Value | Uncertainty |
|---|---|---|
| Orbital Period (Days) | 2.6438981299267326 | 8.42167565970859e-08 |
| Ephemeris (BJD_TDB) | 2460089.426518943 | 0.0001731760862133625 |
| Time saved (hours) | - |
Assumed Priors
| Parameter | Value | Uncertainty | Units | Reference |
|---|---|---|---|---|
| RA | 175.5505363 | decimal | ||
| DEC | 26.7030669 | decimal | ||
| Host Star Metallicity | -0.03 | 0.2 | Kokori et al. 2022 | |
| Host Star log(g) | 4.84 | 0.02 | Log10(cgs) | Kokori et al. 2022 |
| Host Star Radius [R_Sun] | 0.46 | 0.01 | Sol | Kokori et al. 2022 |
| Host Star Effective Temperature [K] | 3350.0 | 300.0 | K | Kokori et al. 2022 |
| a/Rs | 14.54 | 0.14 | Bourrier et al. 2018 | |
| eccentricity | 0.145 | 0.027 | Rosenthal et al. 2021 | |
| inclination [degrees] | 86.858 | 0.049 | deg | Bourrier et al. 2018 |
| omega [degrees] | -25.0 | 13.0 | deg | Rosenthal et al. 2021 |
| orbital period [days] | 2.64389751 | 1.2e-07 | day | Kokori et al. 2022 |
| Rp | 3.81 | 0.12 | R_Earth | ExoFOP-TESS TOI |
| Rp/Rs | 0.0826 | 0 | Bourrier et al. 2018 | |
| ephemeris [JD] | 2454873.01582 | 4e-05 | BJD-TDB | Kokori et al. 2022 |
Previously Published Mid-Transit Times
| Value | Uncertainty | Units | Reference |
|---|---|---|---|
| 2454222.61588 | 0.00012 | HJD | Caceres et al. 2009 |
| 2454235.8355 | 0.0001 | HJD | Shporer et al. 2009 |
| 2454238.479958 | 3.9e-05 | BJD | Turner et al. 2016 |
| 2454428.848 | 0.029 | BJD | Rosenthal et al. 2021 |
| 2454449.99141 | 8e-05 | HJD | Pont et al. 2009 |
| 2454510.80162 | 7e-05 | BJD-TDB | Maciejewski et al. 2014 |
| 2454865.0837586666 | 3.733333333333333e-05 | BJD, BJD-TT | Bourrier et al. 2018, Lanotte et al. 2014, Knutson et al. 2011 |
| 2454873.01582 | 4e-05 | BJD-TDB | Kokori et al. 2022 |
| 2455280.17568 | 0.00017 | BJD-TDB | Baluev et al. 2015 |
| 2459639.963332 | 0.00019 | BJD | ExoFOP-TESS TOI |
Observations
| Parameter | Value | Uncertainty |
|---|---|---|
| Am1 | 1.0207 | 0.0051 |
| Am2 | -0.018 | 0.011 |
| a/Rs | 13.84 | 0.42 |
| Rp/Rs | 0.0819 | 0.0081 |
| ephemeris [JD] | 2459663.7676 | 0.0028 |
| eccentricity | 0.145 | |
| inclination [degrees] | 86.858 | |
| omega [degrees] | -25.0 | |
| orbital period [days] | 2.64389751 | |
| u0 | 1.456887304650178 | |
| u1 | -1.099170134340614 | |
| u2 | 0.9673568596554519 | |
| u3 | -0.3250740155502755 | |
| duration | 0.0472 | 0.0033 |
Included in ephemeris calculations
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) |
| Parameter | Value | Uncertainty |
|---|---|---|
| Am1 | 0.9742 | 0.0029 |
| Am2 | 0.023 | 0.0058 |
| a/Rs | 14.75 | 0.27 |
| Rp/Rs | 0.0903 | 0.0051 |
| ephemeris [JD] | 2459671.6887 | 0.001 |
| eccentricity | 0.145 | |
| inclination [degrees] | 86.858 | |
| omega [degrees] | -25.0 | |
| orbital period [days] | 2.64389751 | |
| u0 | 1.9408851923773742 | |
| u1 | -2.093784814676804 | |
| u2 | 1.6808891344053047 | |
| u3 | -0.5279894870586748 | |
| duration | 0.0416 | 0.0019 |
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 | MBEB (collaborate/publish) |
| Parameter | Value | Uncertainty |
|---|---|---|
| Am1 | 0.9909 | 0.0018 |
| Am2 | 0.0086 | 0.0041 |
| a/Rs | 14.09 | 0.2 |
| Rp/Rs | 0.0792 | 0.0031 |
| ephemeris [JD] | 2460044.47983 | 0.00082 |
| eccentricity | 0.145 | |
| inclination [degrees] | 86.858 | |
| omega [degrees] | -25.0 | |
| orbital period [days] | 2.64389751 | |
| u0 | 1.0290812402588587 | |
| u1 | -0.5068398158286002 | |
| u2 | 0.7945463977941453 | |
| u3 | -0.3167878103847398 | |
| duration | 0.0454 | 0.0015 |
Included in ephemeris calculations
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 | SAJB (collaborate/publish) |
| Parameter | Value | Uncertainty |
|---|---|---|
| Am1 | 0.9737 | 0.0048 |
| Am2 | 0.0148 | 0.0011 |
| a/Rs | 15.2 | 0.4 |
| Rp/Rs | 0.0977 | 0.0059 |
| ephemeris [JD] | 2460089.4233 | 0.0017 |
| eccentricity | 0.145 | |
| inclination [degrees] | 86.858 | |
| omega [degrees] | -25.0 | |
| orbital period [days] | 2.64389751 | |
| u0 | 1.1785488809033944 | |
| u1 | -0.8540039898481702 | |
| u2 | 1.0928012865944319 | |
| u3 | -0.41734616136564795 | |
| duration | 0.0392 | 0.0028 |
Included in ephemeris calculations
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 | KADB (collaborate/publish) | PERC |
