| The Star | |||||
|---|---|---|---|---|---|
| Simbad GAIA 2MASS |
WASP-21 DR2 2831084391023184128 J23095825+1823459 |
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| RA | 23:09:58.2534 | DEC | +18:23:45.882 | ||
| Parallax 3.841 mas |
P.M. RA 17.597 mas/y |
P.M. DEC 18.867 mas/y |
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| MagV 11.55 |
MagR 11.52 |
MagI* 10.832 |
MagJ 10.35 |
MagH 10.085 |
MagK 9.982 |
| MagG 11.399 |
MagGBP 11.744 |
MagGRP 10.912 |
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| *Calculated from GAIA magnitudes. | |||||
Ephemeris
- Verified 
|
|||||
|---|---|---|---|---|---|
| Kokori et al. 2022 | |||||
| Mid-time 2457738.54027 ± 0.00017 BJDTDB |
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| Period 4.32250416 ± 8e-07 days |
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| Transit Parameters | |||||
| Bouchy et al. 2010 | |||||
| Rp/Rs 0.104 ± 0.0018 |
a/Rs 10.54 +0.15 -0.15 |
i 88.8 +0.8 -0.7 deg |
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| e - |
ω - deg |
||||
| DepthR* 14.28 mmag |
Duration* 3.4 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 | |||||
| Bouchy et al. 2010 | |||||
| Teff 5800.0 +100.0 -100.0 K |
Log(g) 4.2 +0.1 -0.1 cm/s2 |
Fe/H -0.46 +0.11 -0.11 dex |
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| ExoClock Status | |||||
|---|---|---|---|---|---|
| Observing Priority | LOW | ||||
| Minimum aperture | 5.0" | ||||
| Total Observations (Recent) | 24 (5) | ||||
| O-C | 1.5 ± 0.7 minutes | ||||
| ExoClock Observations (Recent) | 14 (5) | ||||
| Space Observations (Recent) | 0 (0) | ||||
| ETD Observations (Recent) | 0 (0) | ||||
| Literature Mid-times (Recent) | 10 (0) | ||||
| Kepler Rp/Rs | - | ||||
| TESS Rp/Rs | - | ||||
ExoClock Observations |
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| Planet Observation Date |
Observer Observatory |
Telescope Camera / Filter / Exp [s] |
O-C minutes |
|
|---|---|---|---|---|
| WASP-21b (LOW) 2023-10-10 | Paolo Arcangelo Matassa P:M.P.H.R. Deep Sky (K81) | Ritchey Chretien 40cm-F5.3 CCD ICX453AQ / Lum / 60.0 | -0.82 ± 3.02 | |
| WASP-21b (LOW) 2023-09-06 | Bryan Martin Tiger Butte Observatory Remote | AG Optical IDK ZWO ASI 294 / Clear / 120.0 | 5.28 ± 1.73 | |
| WASP-21b (LOW) 2023-08-06 | Eric Miny BLOIS SOLOGNE ASTRONOMIE OBSERVATORY | Newton T305 QSI 683WS / Lum / 60.0 | -0.44 ± 1.44 | |
| WASP-21b (LOW) 2023-07-16 | Bryan Martin Tiger Butte Observatory Remote | AG Optical IDK ZWO ASI 294 / R / 120.0 | -0.55 ± 1.73 | |
| WASP-21b (LOW) 2023-07-12 | Paolo Arcangelo Matassa P:M.P.H.R. Deep Sky (K81) | Ritchey Chretien 40cm-F5.3 CCD ICX453AQ / Lum / 60.0 | 1.61 ± 2.16 | |
| WASP-21b (LOW) 2022-12-07 | Martin Crow Burnham Observatory | Celestron C9.25 SX694 mono / R / 120.0 | 1.34 ± 2.16 | |
| WASP-21b (LOW) 2022-08-26 | David Arnot OSO PIRATE | PlaneWave Instruments CDK24 24 inch (610 mm) f/6.5 Corrected Dall-Kirkham Astrograph FLI ProLine KAF-16803 / R / 45.0 | 5.37 ± 2.16 | |
| WASP-21b (LOW) 2022-08-26 | Yves Jongen Deep Sky Chile | Plane Wave CDK 17" Moravian 4G / R / 120.0 | -0.25 ± 2.88 | |
| WASP-21b (LOW) 2021-09-23 | Yves Jongen Rasteau Observatory | Plane Wave CDK 17" SBIG STXL 11002 / R / 120.0 | -0.07 ± 1.01 | |
| WASP-21b (LOW) 2020-10-07 | Anaël Wünsche Observatoire des Baronnies Provençales | CDK Planewave SBIG STL11K / Clear / 120.0 | -1.31 ± 1.15 | |
| WASP-21b (LOW) 2020-08-29 | Nikolaos Paschalis Nunki Observatory | Officina Stellare RILA 400 SBIG STXL 11002 / R / 60.0 | 1.62 ± 1.73 | |
| WASP-21b (LOW) 2020-08-17 | Francois Regembal HRTobs | Astrosib RC360 SBIG STX 16803 / Lum / 120.0 | -3.4 ± 2.3 | |
| WASP-21b (LOW) 2020-08-04 | Yves Jongen Rasteau Observatory | Plane Wave CDK 17" SBIG STXL 11002 / R / 120.0 | 4.11 ± 1.44 | |
| WASP-21b (LOW) 2016-10-20 | Anaël Wünsche Observatoire des Baronnies Provençales | CDK Planewave SBIG STL11K / Clear / 120.0 | 0.99 ± 1.58 | |
Literature Mid-times |
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| Planet Observation Date |
Reference | O-C minutes |
||
| 2018-09-21 | Alderson et al. 2020 | 0.25 ± 0.45 | ||
| 2017-09-22 | Alderson et al. 2020 | -1.07 ± 0.43 | ||
| 2017-09-10 | Alderson et al. 2020 | 0.29 ± 0.33 | ||
| 2013-09-22 | Seeliger et al. 2015 | -0.22 ± 1.05 | ||
| 2012-09-11 | Ciceri et al. 2013 | 1.57 ± 1.14 | ||
| 2012-09-11 | Ciceri et al. 2013 | 0.54 ± 0.52 | ||
| 2012-09-11 | Chen et al. 2020 | -0.05 ± 1.02 | ||
| 2012-08-16 | Seeliger et al. 2015 | -1.65 ± 1.66 | ||
| 2011-08-24 | Seeliger et al. 2015 | -2.74 ± 1.61 | ||
| 2008-10-03 | Bouchy et al. 2010 | -3.29 ± 3.17 | ||