| The Star | |||||
|---|---|---|---|---|---|
| Simbad GAIA 2MASS |
HD 332124 DR2 2054523105274216704 J20191200+3234517 |
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| RA | 20:19:12.0049 | DEC | +32:34:51.762 | ||
| Parallax 2.095 mas |
P.M. RA 2.239 mas/y |
P.M. DEC -0.113 mas/y |
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| MagV 10.48 |
MagR* 10.453 |
MagI* 10.24 |
MagJ 10.149 |
MagH 10.121 |
MagK 10.09 |
| MagG 10.541 |
MagGBP 10.642 |
MagGRP 10.381 |
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| *Calculated from GAIA magnitudes. | |||||
Ephemeris
- Verified 
|
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|---|---|---|---|---|---|
| Kokori et al. 2022 | |||||
| Mid-time 2458881.93965 ± 0.00023 BJDTDB |
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| Period 3.61276958 ± 9.5e-07 days |
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| Transit Parameters | |||||
| Johnson et al. 2018 | |||||
| Rp/Rs 0.09952 ± 0.00071 |
a/Rs 6.86 +0.13 -0.12 |
i 86.46 +0.38 -0.34 deg |
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| e - |
ω - deg |
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| DepthR* 12.2 mmag |
Duration* 4.11 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 | |||||
| Johnson et al. 2018 | |||||
| Teff 7598.0 +81.0 -84.0 K |
Log(g) 4.173 +0.015 -0.014 cm/s2 |
Fe/H -0.405 +0.032 -0.033 dex |
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| ExoClock Status | |||||
|---|---|---|---|---|---|
| Observing Priority | LOW | ||||
| Minimum aperture | 5.0" | ||||
| Total Observations (Recent) | 31 (6) | ||||
| O-C | 1.36 ± 0.53 minutes | ||||
| ExoClock Observations (Recent) | 15 (6) | ||||
| Space Observations (Recent) | 8 (0) | ||||
| ETD Observations (Recent) | 0 (0) | ||||
| Literature Mid-times (Recent) | 8 (0) | ||||
| Kepler Rp/Rs | - | ||||
| TESS Rp/Rs | 0.09957 ± 0.00037 | ||||
ExoClock Observations |
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| Planet Observation Date |
Observer Observatory |
Telescope Camera / Filter / Exp [s] |
O-C minutes |
|
|---|---|---|---|---|
| KELT-21b (LOW) 2024-07-27 | Ramon Naves Montcabrer | Meade LX200 12" ACF Moravian G4-9000 / rpr / 120.0 | 2.39 ± 1.14 | |
| KELT-21b (LOW) 2024-07-27 | Ian Sharp PixelSkies | Celestron C11 Edge HD Starlight Xpress Trius Pro SX694 / R / 45.0 | 0.33 ± 1.44 | |
| KELT-21b (LOW) 2024-07-08 | Deborah Smith Complejo Astronomico Los Coloraos, Gorafe | Celestron C11 QHY9 / I / 60.0 | 2.27 ± 2.16 | |
| KELT-21b (LOW) 2024-07-08 | Anaël Wünsche Observatoire des Baronnies Provençales | CDK Planewave 2 ZWO ASI6200 / R / 120.0 | 2.07 ± 0.85 | |
| KELT-21b (LOW) 2024-07-08 | Yves Jongen Rasteau Observatory | Plane Wave CDK 17" SBIG STXL 11002 / R / 90.0 | -1.33 ± 1.73 | |
| KELT-21b (LOW) 2024-06-10 | Deborah Smith Complejo Astronomico Los Coloraos, Gorafe | Celestron C11 EdgeHD ASI2600MM / R / 120.0 | -3.12 ± 2.59 | |
| KELT-21b (LOW) 2023-06-22 | Guillaume Biesse Observatoire de la colline Tossius | Ritchey Chretien GSO ASI 533 MM - Gain=0 / rpr / 180.0 | 2.96 ± 3.17 | |
| KELT-21b (LOW) 2022-10-04 | Adam Popowicz Observatory Pyskowice | RC12" GSO ASI ZWO 1600 MM / ATIK 11000M / R / 60.0 | 1.1 ± 2.3 | |
| KELT-21b (LOW) 2022-07-21 | Jean-Baptiste Marquette MrKite47 | Newton Sky-Watcher 200/1000 ZWO ASI183MM Pro / R / 70.0 | 5.08 ± 2.02 | |
| KELT-21b (LOW) 2022-07-21 | Marianna Michelagnoli Osservatorio Polifunzionale del Chianti | Ritchey-Chretien Moravian G4-9000 / V / 40.0 | 1.76 ± 0.58 | |
| KELT-21b (LOW) 2022-07-21 | Yves Jongen Rasteau Observatory | Plane Wave CDK 17" SBIG STXL 11002 / R / 90.0 | 1.04 ± 2.02 | |
| KELT-21b (LOW) 2022-07-02 | Fran Campos Puig d'Agulles Observtory | RC14" on EQ8 German mount SBIG ST-8XME / R / 90.0 | 6.3 ± 1.73 | |
| KELT-21b (LOW) 2022-07-02 | Thomas SALOMON Astroqueyras | Ritchey chretien 500 F/8 160803 / R / 60.0 | 2.84 ± 1.44 | |
| KELT-21b (LOW) 2022-07-02 | Claudio Lopresti Claudio Lopresti | Meade LX200 12" CCD Sbig ST9xe / Lum / 180.0 | -0.33 ± 2.45 | |
| KELT-21b (LOW) 2022-07-02 | Claudio Lopresti Claudio Lopresti | Mak-Newton CCD Sbig ST10xme / I / 180.0 | -3.5 ± 2.74 | |
Space Observations |
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| Planet Observation Date |
Mission | O-C minutes |
||
| KELT-21b (LOW) 2021-08-19 | TESS | 0.53 ± 0.69 | ||
| KELT-21b (LOW) 2021-08-15 | TESS | -1.13 ± 0.76 | ||
| KELT-21b (LOW) 2021-08-11 | TESS | -0.18 ± 0.72 | ||
| KELT-21b (LOW) 2021-08-08 | TESS | 0.11 ± 0.76 | ||
| KELT-21b (LOW) 2021-08-04 | TESS | 0.6 ± 0.78 | ||
| KELT-21b (LOW) 2021-07-31 | TESS | -0.28 ± 0.79 | ||
| KELT-21b (LOW) 2021-07-28 | TESS | 1.08 ± 0.72 | ||
| KELT-21b (LOW) 2021-07-24 | TESS | -0.49 ± 0.78 | ||
Literature Mid-times |
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| Planet Observation Date |
Reference | O-C minutes |
||
| 2017-05-29 | Johnson et al. 2018 | 0.58 ± 1.15 | ||
| 2017-05-29 | Johnson et al. 2018 | 0.15 ± 0.72 | ||
| 2016-08-24 | Johnson et al. 2018 | 1.24 ± 1.15 | ||
| 2016-08-24 | Johnson et al. 2018 | -0.2 ± 1.15 | ||
| 2016-08-24 | Johnson et al. 2018 | -3.8 ± 1.01 | ||
| 2016-07-19 | Johnson et al. 2018 | -0.78 ± 1.15 | ||
| 2014-10-25 | Johnson et al. 2018 | 5.09 ± 1.44 | ||
| 2014-08-29 | Johnson et al. 2018 | -1.66 ± 2.88 | ||