| The Star | |||||
|---|---|---|---|---|---|
| Simbad GAIA 2MASS |
WASP-28 DR2 2641087471777046016 J23342787-0134482 |
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| RA | 23:34:27.8815 | DEC | -01:34:48.112 | ||
| Parallax 2.841 mas |
P.M. RA 22.318 mas/y |
P.M. DEC 10.78 mas/y |
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| MagV 12.03 |
MagR* 11.817 |
MagI 11.47 |
MagJ 11.078 |
MagH 10.762 |
MagK 10.732 |
| MagG 12.029 |
MagGBP 12.337 |
MagGRP 11.567 |
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| *Calculated from GAIA magnitudes. | |||||
Ephemeris
- Verified 
|
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|---|---|---|---|---|---|
| Kokori et al. 2025 | |||||
| Mid-time 2458058.38003 ± 0.00012 BJDTDB |
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| Period 3.40883447 ± 3.5e-07 days |
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| Transit Parameters | |||||
| Maciejewski et al. 2016 | |||||
| Rp/Rs 0.116 ± 0.0017 |
a/Rs** 8.62 +0.1 -0.1 |
i 88.3 +1.6 -0.9 deg |
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| e - |
ω - deg |
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| DepthR* 17.53 mmag |
Duration* 3.29 hours |
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|
*Calculated from the other parameters, using PyLightcurve.
**Adjusted based on the space observations. |
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| Limb Darkening Parameters | |||||
| Anderson et al. 2015 | |||||
| Teff 6150.0 +140.0 -140.0 K |
Log(g) 4.37 +0.02 -0.02 cm/s2 |
Fe/H -0.29 +0.1 -0.1 dex |
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| ExoClock Status | |||||
|---|---|---|---|---|---|
| Observing Priority | LOW | ||||
| Minimum aperture | 5.41" | ||||
| Total Observations (Recent) | 46 (4) | ||||
| O-C | 0.41 ± 0.41 minutes | ||||
| ExoClock Observations (Recent) | 22 (4) | ||||
| Space Observations (Recent) | 15 (0) | ||||
| ETD Observations (Recent) | 0 (0) | ||||
| Literature Mid-times (Recent) | 9 (0) | ||||
| Kepler Rp/Rs | 0.11388 ± 0.0002 | ||||
| TESS Rp/Rs | 0.11404 ± 0.00055 | ||||
ExoClock Observations |
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| Planet Observation Date |
Observer Observatory |
Telescope Camera / Filter / Exp [s] |
O-C minutes |
|
|---|---|---|---|---|
| WASP-28b (LOW) 2025-09-27 | Jean-Pascal Vignes Deep Sky Chile | Planewave CDK400 QHYCCD 600M / R / 60.0 | 0.38 ± 0.88 | |
| WASP-28b (LOW) 2025-09-16 | Martin Mifsud Manikata Observatory | Meade LX90 ZWO ASI 2600MM-Pro USB 3.0 Cooled Mono Camera / Clear / 300.0 | 0.69 ± 2.59 | |
| WASP-28b (LOW) 2025-08-24 | Miguel Ángel Álava Amat Sarriguren | Meade SC 8" Asi 1600 MM / Lum / 180.0 | 1.32 ± 3.46 | |
| WASP-28b (LOW) 2025-08-24 | Pieter Vuylsteke Marvel (La Palma) | ASA Ritchey ZWO 6200mm / rpr / 60.0 | -0.06 ± 0.78 | |
| WASP-28b (LOW) 2024-10-21 | Bryan Martin Tiger Butte Observatory Remote | AG Optical IDK ZWO ASI 294 / R / 180.0 | -3.28 ± 6.77 | |
| WASP-28b (LOW) 2024-09-24 | Gustavo Muler Obs. Nazaret J47 | lx 200 ST8 XME AO8 / R / 120.0 | 5.65 ± 1.2 | |
| WASP-28b (LOW) 2024-09-06 | Yves Jongen Rasteau Observatory | Plane Wave CDK 17" SBIG STXL 11002 / Lum / 120.0 | -0.23 ± 0.81 | |
| WASP-28b (LOW) 2024-08-27 | Yen-Hsing Lin Starry House Observatory | Mewlon 300 CRS ASI 6200MM Pro / Lum / 60.0 | -3.5 ± 1.44 | |
| WASP-28b (LOW) 2023-11-05 | Charles Miller Miller Observatory | Meade 12" LX850 QHY268M / R / 50.0 | 1.54 ± 1.44 | |
| WASP-28b (LOW) 2023-10-12 | Bryan Martin Tiger Butte Observatory Remote | AG Optical IDK ZWO ASI 294 / Lum / 120.0 | 2.32 ± 2.74 | |
| WASP-28b (LOW) 2023-10-08 | Miguel Ángel Álava Amat Sarriguren | Meade SC 8" Asi 1600 MM / Clear / 180.0 | -4.54 ± 1.73 | |
| WASP-28b (LOW) 2023-09-15 | Adrian Jones Private Observatory (I64) | Meade ACF 30cm QSI 583 / R / 100.0 | 0.29 ± 1.21 | |
| WASP-28b (LOW) 2022-11-08 | Martin Mifsud Manikata Observatory | Meade OTA SBig ST10XME / V / 300.0 | 4.93 ± 2.74 | |
| WASP-28b (LOW) 2022-10-15 | Marc Serrau A77 Dauban | Celestron 11 QHY268 Mono / rpr / 120.0 | 2.4 ± 3.31 | |
| WASP-28b (LOW) 2022-10-15 | Paolo Arcangelo Matassa P:M.P.H.R. Deep Sky (K81) | Ritchey Chretien 40cm-F5.3 CCD ICX453AQ / Lum / 120.0 | -4.94 ± 3.46 | |
| WASP-28b (LOW) 2022-09-22 | Yves Jongen Deep Sky Chile | Plane Wave CDK 17" Moravian 4G / Lum / 120.0 | -1.57 ± 1.01 | |
| WASP-28b (LOW) 2022-08-29 | Yves Jongen Deep Sky Chile | Plane Wave CDK 17" Moravian 4G / Lum / 120.0 | 1.22 ± 0.72 | |
| WASP-28b (LOW) 2020-09-26 | Adrian Jones Private Observatory (I64) | Meade ACF 30cm QSI 583 / R / 90.0 | 4.1 ± 2.88 | |
| WASP-28b (LOW) 2020-09-19 | Yves Jongen Deep Sky Chile | Plane Wave CDK 17" Moravian 4G / R / 120.0 | 2.04 ± 1.3 | |
| WASP-28b (LOW) 2020-08-16 | Francois Regembal HRTobs | Astrosib RC360 SBIG STX 16803 / Lum / 120.0 | 5.71 ± 3.17 | |
| WASP-28b (LOW) 2020-07-30 | Francois Regembal HRTobs | Astrosib RC360 SBIG STX 16803 / Lum / 120.0 | 0.05 ± 2.02 | |
| WASP-28b (LOW) 2010-08-08 | Ramon Naves Montcabrer | Meade LX200 12" ACF Sbig ST8xme / R / 180.0 | 1.47 ± 1.4 | |
Space Observations |
||||
| Planet Observation Date |
Mission | O-C minutes |
||
| WASP-28b (LOW) 2023-10-12 | TESS | -0.99 ± 0.84 | ||
| WASP-28b (LOW) 2023-10-08 | TESS | 0.43 ± 0.91 | ||
| WASP-28b (LOW) 2023-10-05 | TESS | -0.18 ± 0.92 | ||
| WASP-28b (LOW) 2023-09-28 | TESS | 0.12 ± 0.86 | ||
| WASP-28b (LOW) 2023-09-25 | TESS | -1.29 ± 0.79 | ||
| WASP-28b (LOW) 2023-09-21 | TESS | -1.4 ± 1.02 | ||
| WASP-28b (LOW) 2021-09-08 | TESS | 0.62 ± 1.17 | ||
| WASP-28b (LOW) 2021-09-05 | TESS | 0.33 ± 0.92 | ||
| WASP-28b (LOW) 2021-08-26 | TESS | -0.65 ± 0.86 | ||
| WASP-28b (LOW) 2021-08-22 | TESS | 0.94 ± 0.91 | ||
| WASP-28b (LOW) 2017-01-28 | K2 | -1.11 ± 0.43 | ||
| WASP-28b (LOW) 2017-01-25 | K2 | 1.13 ± 0.4 | ||
| WASP-28b (LOW) 2017-01-15 | K2 | 0.37 ± 0.26 | ||
| WASP-28b (LOW) 2017-01-11 | K2 | 0.14 ± 0.32 | ||
| WASP-28b (LOW) 2016-12-29 | K2 | -0.52 ± 0.29 | ||
Literature Mid-times |
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| Planet Observation Date |
Reference | O-C minutes |
||
| 2017-11-14 | Wang et al. 2021 | 0.19 ± 2.3 | ||
| 2014-10-02 | Maciejewski et al. 2016 | 2.64 ± 1.05 | ||
| 2014-09-26 | Maciejewski et al. 2016 | -0.27 ± 3.02 | ||
| 2014-08-19 | Wang et al. 2021 | -5.05 ± 2.02 | ||
| 2013-10-27 | Petrucci et al. 2015 | 2.34 ± 1.01 | ||
| 2012-07-27 | Petrucci et al. 2015 | -3.38 ± 3.17 | ||
| 2011-08-28 | Petrucci et al. 2015 | 2.29 ± 2.32 | ||
| 2010-09-17 | Maciejewski et al. 2016 | -2.63 ± 2.02 | ||
| 2010-04-03 | Anderson et al. 2015 | -0.69 ± 0.45 | ||