| The Star | |||||
|---|---|---|---|---|---|
| Simbad GAIA 2MASS |
K2-55 DR2 6825931948041984256 J22150046-1715025 |
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| RA | 22:15:00.4644 | DEC | -17:15:02.538 | ||
| Parallax 6.24 mas |
P.M. RA -12.59 mas/y |
P.M. DEC -22.096 mas/y |
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| MagV 13.55 |
MagR 13.24 |
MagI 12.09 |
MagJ 11.23 |
MagH 10.615 |
MagK 10.471 |
| MagG 13.062 |
MagGBP 13.793 |
MagGRP 12.247 |
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| *Calculated from GAIA magnitudes. | |||||
Ephemeris
- Verified 
|
|||||
|---|---|---|---|---|---|
| Kokori et al. 2025 | |||||
| Mid-time 2457037.55909 ± 0.00018 BJDTDB |
|||||
| Period 2.8492813 ± 1.8e-06 days |
|||||
| Transit Parameters | |||||
| Dressing et al. 2017 | |||||
| Rp/Rs 0.0561 ± 0.0016 |
a/Rs 10.5 +0.6 -0.6 |
i 88.2 +1.1 -1.0 deg |
|||
| e 0.07 +0.13 -0.06 |
ω 23.9 +115.4 -140.3 deg |
||||
| DepthR* 4.28 mmag |
Duration* 2.03 hours |
||||
|
*Calculated from the other parameters, using PyLightcurve.
**Adjusted based on the space observations. |
|||||
| Limb Darkening Parameters | |||||
| Crossfield et al. 2016 | |||||
| Teff 4456.0 +148.0 -148.0 K |
Log(g) 4.67 +0.05 -0.05 cm/s2 |
Fe/H 0.0 +0.0 -0.0 dex |
|||
| ExoClock Status | |||||
|---|---|---|---|---|---|
| Observing Priority | MEDIUM | ||||
| Minimum aperture | 28.05" | ||||
| Total Observations (Recent) | 28 (1) | ||||
| O-C | 4.91 ± 1.95 minutes | ||||
| ExoClock Observations (Recent) | 3 (1) | ||||
| Space Observations (Recent) | 25 (0) | ||||
| ETD Observations (Recent) | 0 (0) | ||||
| Literature Mid-times (Recent) | 0 (0) | ||||
| Kepler Rp/Rs | 0.05532 ± 0.00024 | ||||
| TESS Rp/Rs | 0.0573 ± 0.0036 | ||||
ExoClock Observations |
||||
| Planet Observation Date |
Observer Observatory |
Telescope Camera / Filter / Exp [s] |
O-C minutes |
|
|---|---|---|---|---|
| K2-55b (MEDIUM) 2025-09-14 | Mercedes Correa Calar Alto | CAHA 1.23m ZWO ASI 461 / Clear / 90.0 | 18.68 ± 5.47 | |
| K2-55b (MEDIUM) 2024-08-11 | Karolina Prucnal DeepSkyChile - ROTUZ | PlaneWave CDK 20 QHY268M pro / R / 180.0 | 11.31 ± 8.35 | |
| K2-55b (MEDIUM) 2024-07-22 | Antelm Ginard Teide Observatory | IAC80 CARONTE / I / 95.0 | 2.34 ± 2.16 | |
Space Observations |
||||
| Planet Observation Date |
Mission | O-C minutes |
||
| K2-55b (MEDIUM) 2021-09-10 | TESS | 3.69 ± 4.9 | ||
| K2-55b (MEDIUM) 2021-09-07 | TESS | -3.68 ± 5.18 | ||
| K2-55b (MEDIUM) 2021-09-04 | TESS | -5.73 ± 3.74 | ||
| K2-55b (MEDIUM) 2021-08-24 | TESS | 2.09 ± 4.18 | ||
| K2-55b (MEDIUM) 2021-08-21 | TESS | 5.08 ± 4.61 | ||
| K2-55b (MEDIUM) 2015-01-23 | K2 | -1.49 ± 2.45 | ||
| K2-55b (MEDIUM) 2015-01-20 | K2 | -0.84 ± 1.31 | ||
| K2-55b (MEDIUM) 2015-01-12 | K2 | 1.02 ± 0.99 | ||
| K2-55b (MEDIUM) 2015-01-09 | K2 | -0.27 ± 1.32 | ||
| K2-55b (MEDIUM) 2015-01-03 | K2 | 1.99 ± 1.31 | ||
| K2-55b (MEDIUM) 2014-12-31 | K2 | 1.03 ± 1.11 | ||
| K2-55b (MEDIUM) 2014-12-28 | K2 | 0.96 ± 0.76 | ||
| K2-55b (MEDIUM) 2014-12-26 | K2 | 0.83 ± 0.79 | ||
| K2-55b (MEDIUM) 2014-12-20 | K2 | -1.09 ± 1.58 | ||
| K2-55b (MEDIUM) 2014-12-17 | K2 | -1.23 ± 0.78 | ||
| K2-55b (MEDIUM) 2014-12-14 | K2 | -1.87 ± 2.59 | ||
| K2-55b (MEDIUM) 2014-12-11 | K2 | -1.88 ± 1.17 | ||
| K2-55b (MEDIUM) 2014-12-09 | K2 | 0.57 ± 1.17 | ||
| K2-55b (MEDIUM) 2014-12-06 | K2 | -1.6 ± 0.82 | ||
| K2-55b (MEDIUM) 2014-12-03 | K2 | -0.84 ± 0.78 | ||
| K2-55b (MEDIUM) 2014-11-30 | K2 | 0.97 ± 0.86 | ||
| K2-55b (MEDIUM) 2014-11-27 | K2 | -1.78 ± 0.89 | ||
| K2-55b (MEDIUM) 2014-11-24 | K2 | 1.56 ± 0.98 | ||
| K2-55b (MEDIUM) 2014-11-21 | K2 | 0.55 ± 0.91 | ||
| K2-55b (MEDIUM) 2014-11-19 | K2 | 2.07 ± 1.4 | ||