| The Star | |||||
|---|---|---|---|---|---|
| Simbad GAIA 2MASS |
K2-198 DR2 3628687065162340224 J13152252-0627535 |
||||
| RA | 13:15:22.5217 | DEC | -06:27:53.620 | ||
| Parallax 9.016 mas |
P.M. RA -36.688 mas/y |
P.M. DEC -21.893 mas/y |
|||
| MagV 10.97 |
MagR* 10.745 |
MagI* 10.062 |
MagJ 9.741 |
MagH 9.313 |
MagK 9.228 |
| MagG 10.996 |
MagGBP 11.458 |
MagGRP 10.411 |
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| *Calculated from GAIA magnitudes. | |||||
Ephemeris
- Verified 
|
|||||
|---|---|---|---|---|---|
| Kokori et al. 2025 | |||||
| Mid-time 2457954.45472 ± 0.00045 BJDTDB |
|||||
| Period 17.042881 ± 1.2e-05 days |
|||||
| Transit Parameters | |||||
| Mayo et al. 2018 | |||||
| Rp/Rs 0.0485 ± 0.0023 |
a/Rs 42.0 +4.1 -8.4 |
i 89.4 +0.4 -0.6 deg |
|||
| e - |
ω - deg |
||||
| DepthR* 3.02 mmag |
Duration* 2.95 hours |
||||
|
*Calculated from the other parameters, using PyLightcurve.
**Adjusted based on the space observations. |
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| Limb Darkening Parameters | |||||
| Mayo et al. 2018 | |||||
| Teff 5262.0 +50.0 -50.0 K |
Log(g) 4.63 +0.1 -0.1 cm/s2 |
Fe/H -0.16 +0.08 -0.08 dex |
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| ExoClock Status | |||||
|---|---|---|---|---|---|
| Observing Priority | HIGH | ||||
| Minimum aperture | 17.29" | ||||
| Total Observations (Recent) | 11 (1) | ||||
| O-C | -2.69 ± 3.31 minutes | ||||
| ExoClock Observations (Recent) | 4 (1) | ||||
| Space Observations (Recent) | 7 (0) | ||||
| ETD Observations (Recent) | 0 (0) | ||||
| Literature Mid-times (Recent) | 0 (0) | ||||
| Kepler Rp/Rs | 0.04929 ± 0.00023 | ||||
| TESS Rp/Rs | 0.0482 ± 0.0034 | ||||
ExoClock Observations |
||||
| Planet Observation Date |
Observer Observatory |
Telescope Camera / Filter / Exp [s] |
O-C minutes |
|
|---|---|---|---|---|
| K2-198b (HIGH) 2026-04-10 | Daniel Trueba Castillo Montsec Sky Telescope | Halfmann FLI ML6303E / R / 300.0 | -2.69 ± 3.31 | |
| K2-198b (HIGH) 2023-04-16 | Anaël Wünsche El Sauce Observatory | CDK Planewave Chili Moravian G4 16k / R / 120.0 | 12.41 ± 7.34 | |
| K2-198b (HIGH) 2023-04-16 | Yves Jongen Deep Sky Chile | Plane Wave CDK 17" Moravian 4G / R / 60.0 | 5.06 ± 5.04 | |
| K2-198b (HIGH) 2023-03-30 | Josafat González Rodríguez El Sauce Observatory | Planewave CDK24 FLI ProLine PL9000 / rpr / 30.0 | 5.47 ± 1.73 | |
Space Observations |
||||
| Planet Observation Date |
Mission | O-C minutes |
||
| K2-198b (HIGH) 2021-12-07 | TESS | 9.02 ± 5.04 | ||
| K2-198b (HIGH) 2018-05-05 | K2 | -2.16 ± 2.02 | ||
| K2-198b (HIGH) 2018-04-18 | K2 | -0.08 ± 1.02 | ||
| K2-198b (HIGH) 2018-04-01 | K2 | -1.36 ± 0.45 | ||
| K2-198b (HIGH) 2015-08-21 | K2 | 2.56 ± 0.72 | ||
| K2-198b (HIGH) 2015-08-04 | K2 | -0.6 ± 1.58 | ||
| K2-198b (HIGH) 2015-07-18 | K2 | 0.22 ± 0.88 | ||