results
K2-31 b
Total Reductions to Date: 5
Date Processed: 09/18/2023 at 00:07:19 (PDT)
Exoplanet Watch Ephemeris
| Parameter | Value | Uncertainty |
|---|---|---|
| Orbital Period (Days) | - | - |
| Ephemeris (BJD_TDB) | - | - |
| Time saved (hours) | - |
Assumed Priors
| Parameter | Value | Uncertainty | Units | Reference |
|---|---|---|---|---|
| RA | 245.4405531 | decimal | ||
| DEC | -23.548273 | decimal | ||
| Host Star Metallicity | 0.08 | 0.05 | Grziwa et al. 2016 | |
| Host Star log(g) | 4.6 | 0.07 | Log10(cgs) | Grziwa et al. 2016 |
| Host Star Radius [R_Sun] | 0.78 | 0.07 | Sol | Grziwa et al. 2016 |
| Host Star Effective Temperature [K] | 5280.0 | 70.0 | K | Grziwa et al. 2016 |
| a/Rs | 6.05 | 0.5 | Grziwa et al. 2016 | |
| eccentricity | 0.0 | Grziwa et al. 2016 | ||
| inclination [degrees] | 79.9 | 0.8 | deg | Grziwa et al. 2016 |
| omega [degrees] | 0.0 | deg | Grziwa et al. 2016 | |
| orbital period [days] | 1.25785 | 2e-06 | day | Grziwa et al. 2016 |
| Rp | 11.88 | 3.92 | R_Earth | Grziwa et al. 2016 |
| Rp/Rs | 0.0846 | 0 | Barros et al. 2016 | |
| ephemeris [JD] | 2457191.70889 | 0.00024 | BJD | Grziwa et al. 2016 |
Previously Published Mid-Transit Times
| Value | Uncertainty | Units | Reference |
|---|---|---|---|
| 2456893.59877 | 0.0001 | BJD-TDB | Crossfield et al. 2016 |
| 2457191.70889 | 0.00024 | BJD | Grziwa et al. 2016, Dai et al. 2016 |
Observations
| Parameter | Value | Uncertainty |
|---|---|---|
| Am1 | 1.102 | 0.031 |
| Am2 | -0.034 | 0.013 |
| a/Rs | 4.2 | 1.07 |
| Rp/Rs | 0.169 | 0.04 |
| ephemeris [JD] | 2459430.6832 | 0.0087 |
| eccentricity | 0.0 | |
| inclination [degrees] | 79.9 | |
| omega [degrees] | 0.0 | |
| orbital period [days] | 1.25785 | |
| u0 | 1.8514909366078531 | |
| u1 | -3.240500097700199 | |
| u2 | 3.7227926412239825 | |
| u3 | -1.3337834246577036 | |
| duration | 0 | 0 |
Not included in ephemeris calculations
Posteriors ( PNG, PDF - high resolution )
Observation Data ( JSON )
| Filter | Detail | Min | Max |
|---|---|---|---|
| CV | MObs CV | 350.0 nm | 850.0 nm |
| Organization | Observer Code | Secondary Observers |
|---|---|---|
| AAVSO | TKVA (collaborate/publish) | MOBS |
| Parameter | Value | Uncertainty |
|---|---|---|
| Am1 | 0.96 | 0.025 |
| Am2 | 0.025 | 0.013 |
| a/Rs | 3.98 | 1.45 |
| Rp/Rs | 0.169 | 0.048 |
| ephemeris [JD] | 2459377.846 | 0.011 |
| eccentricity | 0.0 | |
| inclination [degrees] | 79.9 | |
| omega [degrees] | 0.0 | |
| orbital period [days] | 1.25785 | |
| u0 | 1.5715790109227954 | |
| u1 | -2.6955338889597766 | |
| u2 | 3.355136602594869 | |
| u3 | -1.2311816745624564 | |
| duration | 0 | 0 |
Not included in ephemeris calculations
Posteriors ( PNG, PDF - high resolution )
Observation Data ( JSON )
| Filter | Detail | Min | Max |
|---|---|---|---|
| V | Johnson V | 502.8 nm | 586.8 nm |
| Organization | Observer Code | Secondary Observers |
|---|---|---|
| AAVSO | SGDA (collaborate/publish) | MOBS |
| Parameter | Value | Uncertainty |
|---|---|---|
| Am1 | 1.046 | 0.012 |
| Am2 | -0.0174 | 0.0058 |
| a/Rs | 5.77 | 1.45 |
| Rp/Rs | 0.165 | 0.047 |
| ephemeris [JD] | 2459636.954 | 0.012 |
| eccentricity | 0.0 | |
| inclination [degrees] | 79.9 | |
| omega [degrees] | 0.0 | |
| orbital period [days] | 1.25785 | |
| u0 | 1.57077045885653 | |
| u1 | -2.6935691069837997 | |
| u2 | 3.352921033547983 | |
| u3 | -1.2301223354582964 | |
| duration | 0 | 0 |
Not included in ephemeris calculations
Posteriors ( PNG, PDF - high resolution )
Observation Data ( JSON )
| Filter | Detail | Min | Max |
|---|---|---|---|
| V | Johnson V | 502.8 nm | 586.8 nm |
| Organization | Observer Code | Secondary Observers |
|---|---|---|
| AAVSO | ITYA (collaborate/publish) | MOBS |
| Parameter | Value | Uncertainty |
|---|---|---|
| Am1 | 1.025 | 0.021 |
| Am2 | -0.008 | 0.016 |
| a/Rs | 6.12 | 1.2 |
| Rp/Rs | 0.131 | 0.049 |
| ephemeris [JD] | 2459670.951 | 0.012 |
| eccentricity | 0.0 | |
| inclination [degrees] | 79.9 | |
| omega [degrees] | 0.0 | |
| orbital period [days] | 1.25785 | |
| u0 | 1.5714682741657777 | |
| u1 | -2.694922772035191 | |
| u2 | 3.354055241450707 | |
| u3 | -1.2306006936019767 | |
| duration | 0 | 0 |
Not included in ephemeris calculations
Posteriors ( PNG, PDF - high resolution )
Observation Data ( JSON )
| Filter | Detail | Min | Max |
|---|---|---|---|
| V | Johnson V | 502.8 nm | 586.8 nm |
| Organization | Observer Code | Secondary Observers |
|---|---|---|
| AAVSO | YLUA (collaborate/publish) | MOBS |
| Parameter | Value | Uncertainty |
|---|---|---|
| Am1 | 1.015 | 0.013 |
| Am2 | -0.0063 | 0.0051 |
| a/Rs | 6.22 | 1.34 |
| Rp/Rs | 0.165 | 0.047 |
| ephemeris [JD] | 2459694.821 | 0.012 |
| eccentricity | 0.0 | |
| inclination [degrees] | 79.9 | |
| omega [degrees] | 0.0 | |
| orbital period [days] | 1.25785 | |
| u0 | 1.571651251206957 | |
| u1 | -2.6955547051579134 | |
| u2 | 3.3547867141369707 | |
| u3 | -1.2308832101957972 | |
| duration | 0 | 0 |
Not included in ephemeris calculations
Posteriors ( PNG, PDF - high resolution )
Observation Data ( JSON )
| Filter | Detail | Min | Max |
|---|---|---|---|
| V | Johnson V | 502.8 nm | 586.8 nm |
| Organization | Observer Code | Secondary Observers |
|---|---|---|
| AAVSO | CPHB (collaborate/publish) | MOBS |
