results
K2-237 b
Total Reductions to Date: 3
Date Processed: 12/03/2024 at 07:00:24 (PST)
Exoplanet Watch Ephemeris
| Parameter | Value | Uncertainty |
|---|---|---|
| Orbital Period (Days) | 2.180535099901398 | 2.907895379743948e-07 |
| Ephemeris (BJD_TDB) | 2460556.575086914 | 0.0003862159839971051 |
| Time saved (hours) | 0.0003 |
Assumed Priors
| Parameter | Value | Uncertainty | Units | Reference |
|---|---|---|---|---|
| RA | 253.7688479 | decimal | ||
| DEC | -28.7105836 | decimal | ||
| Host Star Metallicity | 0.337 | 0.076 | Thygesen et al. 2023 | |
| Host Star log(g) | 4.35 | 0.02 | Log10(cgs) | Thygesen et al. 2023 |
| Host Star Radius [R_Sun] | 1.24 | 0.04 | Sol | Thygesen et al. 2023 |
| Host Star Effective Temperature [K] | 6180.0 | 160.0 | K | Thygesen et al. 2023 |
| a/Rs | 6.18 | 0.16 | Thygesen et al. 2023 | |
| eccentricity | 0.03 | 0.033 | Thygesen et al. 2023 | |
| inclination [degrees] | 88.37 | 1.0 | deg | Thygesen et al. 2023 |
| omega [degrees] | 73.0 | 57.0 | deg | Thygesen et al. 2023 |
| orbital period [days] | 2.18053332 | 5.4e-07 | day | Thygesen et al. 2023 |
| Rp | 16.06 | 0.63 | R_Earth | Thygesen et al. 2023 |
| Rp/Rs | 0.119 | 0 | Thygesen et al. 2023 | |
| ephemeris [JD] | 2457706.61618 | 3e-05 | BJD-TDB | Thygesen et al. 2023 |
Previously Published Mid-Transit Times
| Value | Uncertainty | Units | Reference |
|---|---|---|---|
| 2457706.61618 | 3e-05 | BJD-TDB | Thygesen et al. 2023 |
| 2457942.11408 | 0.00012 | BJD-TDB | Kokori et al. 2023 |
| 2458639.88506 | 0.00039 | BJD | Patel & Espinoza 2022 |
| 2458628.98146 | 0.00039 | BJD-TDB | Ivshina & Winn 2022 |
| 2457861.4341 | 0.00013 | BJD-TDB | Kokori et al. 2022 |
| 2457702.255123 | 3.2e-05 | BJD-TDB | Ikwut-Ukwa et al. 2020 |
| 2457656.463379 | 5e-06 | BJD-TDB | Smith et al. 2019 |
| 2457684.8101 | 0.0001 | JD | Soto et al. 2018 |
| 2459363.821393 | 0.000699 | BJD | ExoFOP-TESS TOI |
Observations
| Parameter | Value | Uncertainty |
|---|---|---|
| Am1 | 1.0898 | 0.0042 |
| Am2 | -0.086 | 0.045 |
| a/Rs | 6.86 | 0.46 |
| Rp/Rs | 0.1014 | 0.0062 |
| ephemeris [JD] | 2460039.8018 | 0.0045 |
| eccentricity | 0.03 | |
| inclination [degrees] | 88.37 | |
| omega [degrees] | 73.0 | |
| orbital period [days] | 2.18053332 | |
| u0 | 2.222788841306601 | |
| u1 | -3.874670636880728 | |
| u2 | 4.1454440951438825 | |
| u3 | -1.4935622377978244 | |
| duration | 0.0436 | 0.0058 |
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 | PKIB (collaborate/publish) |
| Parameter | Value | Uncertainty |
|---|---|---|
| Am1 | 1.0072 | 0.0038 |
| Am2 | 7e-05 | 0.00057 |
| a/Rs | 5.943 | 0.064 |
| Rp/Rs | 0.1146 | 0.0014 |
| ephemeris [JD] | 2460109.55752 | 0.00058 |
| eccentricity | 0.03 | |
| inclination [degrees] | 88.37 | |
| omega [degrees] | 73.0 | |
| orbital period [days] | 2.18053332 | |
| u0 | 2.2221533653472596 | |
| u1 | -3.8733717182749565 | |
| u2 | 4.14438657292179 | |
| u3 | -1.4931681582379213 | |
| duration | 0.126 | 0.0015 |
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 | SMAJA (collaborate/publish) | ZMID |
| Parameter | Value | Uncertainty |
|---|---|---|
| Am1 | 1.0021 | 0.0033 |
| Am2 | -0.0018 | 0.001 |
| a/Rs | 6.13 | 0.18 |
| Rp/Rs | 0.1122 | 0.0041 |
| ephemeris [JD] | 2460556.5734 | 0.0015 |
| eccentricity | 0.03 | |
| inclination [degrees] | 88.37 | |
| omega [degrees] | 73.0 | |
| orbital period [days] | 2.18053332 | |
| u0 | 2.430992877722908 | |
| u1 | -4.279856724206568 | |
| u2 | 4.410480217910597 | |
| u3 | -1.5616163057056593 | |
| duration | 0.1218 | 0.0038 |
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 | HMAR (collaborate/publish) |
