| The Star | |||||
|---|---|---|---|---|---|
| Simbad GAIA 2MASS |
K2-25 DR2 3311804515502788352 J04130560+1514520 |
||||
| RA | 04:13:05.6134 | DEC | +15:14:52.013 | ||
| Parallax 22.215 mas |
P.M. RA 122.148 mas/y |
P.M. DEC -18.337 mas/y |
|||
| MagV 15.56 |
MagR 13.72 |
MagI* 12.569 |
MagJ 11.303 |
MagH 10.732 |
MagK 10.444 |
| MagG 14.382 |
MagGBP 16.075 |
MagGRP 13.12 |
|||
| *Calculated from GAIA magnitudes. | |||||
Ephemeris
- Verified 
|
|||||
|---|---|---|---|---|---|
| Kokori et al. 2022 | |||||
| Mid-time 2457651.471616 ± 6.2e-05 BJDTDB |
|||||
| Period 3.48456248 ± 6.4e-07 days |
|||||
| Transit Parameters | |||||
| Mann et al. 2016 | |||||
| Rp/Rs 0.106 ± 0.029 |
a/Rs** 25.1 +4.1 -4.1 |
i 88.3 +1.2 -0.7 deg |
|||
| e 0.27 +0.16 -0.21 |
ω 62.0 +44.0 -39.0 deg |
||||
| DepthR* 13.99 mmag |
Duration* 0.79 hours |
||||
|
*Calculated from the other parameters, using PyLightcurve.
**Adjusted based on the space observations. |
|||||
| Limb Darkening Parameters | |||||
| Mann et al. 2016 | |||||
| Teff 3180.0 +60.0 -60.0 K |
Log(g) 4.98 +0.07 -0.07 cm/s2 |
Fe/H 0.15 +0.03 -0.03 dex |
|||
| ExoClock Status | |||||
|---|---|---|---|---|---|
| Observing Priority | LOW | ||||
| Minimum aperture | 13.69" | ||||
| Total Observations (Recent) | 55 (6) | ||||
| O-C | 1.48 ± 0.46 minutes | ||||
| ExoClock Observations (Recent) | 13 (6) | ||||
| Space Observations (Recent) | 5 (0) | ||||
| ETD Observations (Recent) | 0 (0) | ||||
| Literature Mid-times (Recent) | 37 (0) | ||||
| Kepler Rp/Rs | - | ||||
| TESS Rp/Rs | 0.1028 ± 0.0055 | ||||
ExoClock Observations |
||||
| Planet Observation Date |
Observer Observatory |
Telescope Camera / Filter / Exp [s] |
O-C minutes |
|
|---|---|---|---|---|
| K2-25b (LOW) 2024-01-14 | Lee YuHsien KMSH Observatory | C14HD QSI-660 / Clear / 60.0 | -0.63 ± 2.3 | |
| K2-25b (LOW) 2023-11-19 | Mario Morales-Aimar Observatorio de Sencelles MPC K14 | Reflector 10" SBIG ST7-XME / Clear / 150.0 | 0.23 ± 2.74 | |
| K2-25b (LOW) 2023-11-05 | Nataliia Maslennikova Caucasus Mountain Observatory SAI MSU | RC-600 ASA Andor iKon-L / ipr / 60.0 | 1.36 ± 0.89 | |
| K2-25b (LOW) 2023-10-16 | Nataliia Maslennikova Caucasus Mountain Observatory SAI MSU | RC-600 ASA Andor iKon-L / ipr / 120.0 | 1.36 ± 0.66 | |
| K2-25b (LOW) 2023-10-09 | Alvaro Fornas Silva MPC J57. Centro Astronómico Alto Turia | Planewave CDK 17 QHY600M / Lum / 180.0 | 3.9 ± 2.16 | |
| K2-25b (LOW) 2023-09-25 | Alvaro Fornas Silva MPC J57. Centro Astronómico Alto Turia | Planewave CDK 17 QHY600M / Lum / 180.0 | 3.11 ± 1.44 | |
| K2-25b (LOW) 2022-12-16 | Martin Crow Burnham Observatory | Celestron C9.25 SX694 mono / Clear / 150.0 | 0.18 ± 2.02 | |
| K2-25b (LOW) 2022-01-26 | Jacques Michelet Claix | GSO Ritchey-Chrétien QSI-632 / R / 180.0 | -1.54 ± 3.02 | |
| K2-25b (LOW) 2021-12-22 | Carole Haswell OSO PIRATE | PlaneWave Instruments CDK24 24 inch (610 mm) f/6.5 Corrected Dall-Kirkham Astrograph FLI ProLine KAF-16803 / R / 60.0 | 0.66 ± 4.32 | |
| K2-25b (LOW) 2021-10-17 | Taewoo Kim Deokheung Optical Astronomy Observatory | NYSC 1m Telescope FLI PL-16803 or PI SOPHIA-2048B / R / 60.0 | -1.38 ± 1.3 | |
| K2-25b (LOW) 2021-01-08 | Taewoo Kim Deokheung Optical Astronomy Observatory | NYSC 1m Telescope FLI PL-16803 or PI SOPHIA-2048B / I / 60.0 | 0.01 ± 0.58 | |
| K2-25b (LOW) 2020-12-25 | Taewoo Kim Deokheung Optical Astronomy Observatory | NYSC 1m Telescope FLI PL-16803 or PI SOPHIA-2048B / I / 60.0 | 0.94 ± 0.72 | |
| K2-25b (LOW) 2020-12-04 | Taewoo Kim Deokheung Optical Astronomy Observatory | NYSC 1m Telescope FLI PL-16803 or PI SOPHIA-2048B / R / 90.0 | 0.33 ± 1.3 | |
Space Observations |
||||
| Planet Observation Date |
Mission | O-C minutes |
||
| K2-25b (LOW) 2021-11-04 | TESS | 1.77 ± 1.73 | ||
| K2-25b (LOW) 2021-10-31 | TESS | 1.86 ± 2.02 | ||
| K2-25b (LOW) 2021-10-28 | TESS | -0.21 ± 1.44 | ||
| K2-25b (LOW) 2021-10-21 | TESS | 0.69 ± 1.44 | ||
| K2-25b (LOW) 2021-10-14 | TESS | -1.72 ± 3.6 | ||
Literature Mid-times |
||||
| Planet Observation Date |
Reference | O-C minutes |
||
| 2017-05-11 | Kain et al. 2020 | 0.21 ± 0.26 | ||
| 2017-01-02 | Kain et al. 2020 | 0.11 ± 0.2 | ||
| 2016-12-30 | Kain et al. 2020 | 0.24 ± 0.27 | ||
| 2016-12-26 | Kain et al. 2020 | -0.51 ± 0.25 | ||
| 2016-12-23 | Kain et al. 2020 | -0.13 ± 0.24 | ||
| 2016-12-19 | Kain et al. 2020 | 0.58 ± 0.3 | ||
| 2016-12-12 | Kain et al. 2020 | 0.39 ± 0.25 | ||
| 2016-12-09 | Kain et al. 2020 | 0.95 ± 0.98 | ||
| 2016-12-09 | Kain et al. 2020 | -1.07 ± 0.23 | ||
| 2016-12-05 | Kain et al. 2020 | -0.08 ± 0.24 | ||
| 2016-12-02 | Kain et al. 2020 | 0.22 ± 0.29 | ||
| 2016-11-28 | Kain et al. 2020 | 0.28 ± 0.22 | ||
| 2016-11-25 | Kain et al. 2020 | 0.01 ± 0.25 | ||
| 2016-11-18 | Kain et al. 2020 | 0.24 ± 0.28 | ||
| 2016-11-11 | Kain et al. 2020 | -0.45 ± 0.27 | ||
| 2016-11-04 | Kain et al. 2020 | -0.3 ± 0.37 | ||
| 2016-10-28 | Kain et al. 2020 | 0.04 ± 0.33 | ||
| 2016-10-21 | Kain et al. 2020 | -0.23 ± 0.33 | ||
| 2016-10-14 | Kain et al. 2020 | -0.1 ± 0.29 | ||
| 2016-10-07 | Kain et al. 2020 | -0.22 ± 0.5 | ||
| 2015-12-16 | Kain et al. 2020 | -0.05 ± 0.39 | ||
| 2015-12-09 | Kain et al. 2020 | 0.23 ± 0.25 | ||
| 2015-04-19 | Kain et al. 2020 | -0.55 ± 0.68 | ||
| 2015-04-12 | Kain et al. 2020 | -1.51 ± 0.42 | ||
| 2015-04-09 | Kain et al. 2020 | 2.17 ± 0.8 | ||
| 2015-04-05 | Kain et al. 2020 | 0.85 ± 0.5 | ||
| 2015-04-02 | Kain et al. 2020 | -1.4 ± 0.64 | ||
| 2015-03-29 | Kain et al. 2020 | 1.2 ± 0.55 | ||
| 2015-03-22 | Kain et al. 2020 | 0.24 ± 0.56 | ||
| 2015-03-15 | Kain et al. 2020 | -0.7 ± 0.53 | ||
| 2015-03-01 | Kain et al. 2020 | -0.58 ± 0.56 | ||
| 2015-02-26 | Kain et al. 2020 | 0.6 ± 0.53 | ||
| 2015-02-23 | Kain et al. 2020 | -1.15 ± 0.47 | ||
| 2015-02-19 | Kain et al. 2020 | 1.52 ± 0.56 | ||
| 2015-02-16 | Kain et al. 2020 | -1.86 ± 0.54 | ||
| 2015-02-12 | Kain et al. 2020 | 1.37 ± 0.49 | ||
| 2015-02-09 | Kain et al. 2020 | 2.14 ± 0.5 | ||