| The Star | |||||
|---|---|---|---|---|---|
| Simbad GAIA 2MASS |
WASP-42 DR2 6139698733664726784 J12515557-4204249 |
||||
| RA | 12:51:55.5580 | DEC | -42:04:25.094 | ||
| Parallax 5.612 mas |
P.M. RA -49.781 mas/y |
P.M. DEC 4.865 mas/y |
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| MagV 12.57 |
MagR* 11.708 |
MagI* 11.557 |
MagJ 10.542 |
MagH 10.103 |
MagK 10.033 |
| MagG 11.969 |
MagGBP 12.483 |
MagGRP 11.32 |
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| *Calculated from GAIA magnitudes. | |||||
Ephemeris
- Verified 
|
|||||
|---|---|---|---|---|---|
| Kokori et al. 2025 | |||||
| Mid-time 2457174.961996 ± 6.7e-05 BJDTDB |
|||||
| Period 4.98168168 ± 2.5e-07 days |
|||||
| Transit Parameters | |||||
| Southworth et al. 2016 | |||||
| Rp/Rs 0.1293 ± 0.0008 |
a/Rs 13.5 +0.3 -0.3 |
i 88.0 +0.17 -0.17 deg |
|||
| e - |
ω - deg |
||||
| DepthR* 21.38 mmag |
Duration* 2.9 hours |
||||
|
*Calculated from the other parameters, using PyLightcurve.
**Adjusted based on the space observations. |
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| Limb Darkening Parameters | |||||
| Lendl et al. 2012 | |||||
| Teff 5200.0 +150.0 -150.0 K |
Log(g) 4.52 +0.06 -0.06 cm/s2 |
Fe/H 0.05 +0.13 -0.13 dex |
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| ExoClock Status | |||||
|---|---|---|---|---|---|
| Observing Priority | LOW | ||||
| Minimum aperture | 5.24" | ||||
| Total Observations (Recent) | 25 (3) | ||||
| O-C | 2.24 ± 0.33 minutes | ||||
| ExoClock Observations (Recent) | 7 (3) | ||||
| Space Observations (Recent) | 14 (0) | ||||
| ETD Observations (Recent) | 0 (0) | ||||
| Literature Mid-times (Recent) | 4 (0) | ||||
| Kepler Rp/Rs | - | ||||
| TESS Rp/Rs | 0.12706 ± 0.00039 | ||||
ExoClock Observations |
||||
| Planet Observation Date |
Observer Observatory |
Telescope Camera / Filter / Exp [s] |
O-C minutes |
|
|---|---|---|---|---|
| WASP-42b (LOW) 2025-03-22 | Yves Jongen Deep Sky Chile | Plane Wave CDK 17" Moravian 4G / Lum / 120.0 | 1.68 ± 0.52 | |
| WASP-42b (LOW) 2025-03-17 | Jean-Pascal Vignes Deep Sky Chile | Planewave CDK400 QHYCCD 600M / Lum / 60.0 | 2.3 ± 0.48 | |
| WASP-42b (LOW) 2025-03-07 | Yves Jongen Deep Sky Chile | Plane Wave CDK 17" Moravian 4G / Lum / 120.0 | 3.5 ± 0.84 | |
| WASP-42b (LOW) 2022-04-11 | Yves Jongen Deep Sky Chile | Plane Wave CDK 17" Moravian 4G / Lum / 120.0 | -1.27 ± 0.86 | |
| WASP-42b (LOW) 2022-04-06 | Yves Jongen Deep Sky Chile | Plane Wave CDK 17" Moravian 4G / Lum / 120.0 | -1.15 ± 0.72 | |
| WASP-42b (LOW) 2022-03-22 | Yves Jongen Deep Sky Chile | Plane Wave CDK 17" Moravian 4G / Lum / 120.0 | 1.07 ± 1.15 | |
| WASP-42b (LOW) 2022-03-17 | Yves Jongen Deep Sky Chile | Plane Wave CDK 17" Moravian 4G / R / 120.0 | 2.06 ± 2.16 | |
Space Observations |
||||
| Planet Observation Date |
Mission | O-C minutes |
||
| WASP-42b (LOW) 2023-04-29 | TESS | -0.12 ± 0.75 | ||
| WASP-42b (LOW) 2023-04-24 | TESS | 0.82 ± 0.66 | ||
| WASP-42b (LOW) 2023-04-19 | TESS | -0.49 ± 0.75 | ||
| WASP-42b (LOW) 2023-04-14 | TESS | 0.74 ± 0.71 | ||
| WASP-42b (LOW) 2023-04-09 | TESS | 0.18 ± 0.62 | ||
| WASP-42b (LOW) 2021-04-27 | TESS | 0.1 ± 0.62 | ||
| WASP-42b (LOW) 2021-04-22 | TESS | -0.56 ± 0.69 | ||
| WASP-42b (LOW) 2021-04-17 | TESS | 0.36 ± 0.71 | ||
| WASP-42b (LOW) 2021-04-12 | TESS | -0.36 ± 0.66 | ||
| WASP-42b (LOW) 2021-04-07 | TESS | 0.25 ± 0.66 | ||
| WASP-42b (LOW) 2019-04-21 | TESS | -1.25 ± 0.72 | ||
| WASP-42b (LOW) 2019-04-16 | TESS | 0.74 ± 0.71 | ||
| WASP-42b (LOW) 2019-04-06 | TESS | 0.59 ± 0.78 | ||
| WASP-42b (LOW) 2019-04-01 | TESS | 1.05 ± 0.69 | ||
Literature Mid-times |
||||
| Planet Observation Date |
Reference | O-C minutes |
||
| 2013-06-29 | Southworth et al. 2016 | 0.06 ± 0.26 | ||
| 2013-06-19 | Southworth et al. 2016 | -0.17 ± 0.14 | ||
| 2013-05-25 | Southworth et al. 2016 | -0.07 ± 0.2 | ||
| 2011-03-30 | Lendl et al. 2012 | 0.9 ± 0.35 | ||