| The Star | |||||
|---|---|---|---|---|---|
| Simbad GAIA 2MASS |
HD 209458 DR2 1779546757669063552 J22031077+1853036 |
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| RA | 22:03:10.7729 | DEC | +18:53:03.548 | ||
| Parallax 20.675 mas |
P.M. RA 29.579 mas/y |
P.M. DEC -17.89 mas/y |
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| MagV 7.63 |
MagR* 7.305 |
MagI* 7.006 |
MagJ 6.591 |
MagH 6.366 |
MagK 6.308 |
| MagG 7.509 |
MagGBP 7.813 |
MagGRP 7.09 |
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| *Calculated from GAIA magnitudes. | |||||
Ephemeris
- Verified 
|
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|---|---|---|---|---|---|
| Kokori et al. 2022 | |||||
| Mid-time 2455420.84456 ± 0.00016 BJDTDB |
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| Period 3.52474955 ± 3.2e-07 days |
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| Transit Parameters | |||||
| Torres et al. 2008 | |||||
| Rp/Rs 0.12086 ± 0.0001 |
a/Rs 8.76 +0.04 -0.04 |
i 86.71 +0.05 -0.05 deg |
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| e - |
ω - deg |
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| DepthR* 18.11 mmag |
Duration* 3.09 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 | |||||
| Torres et al. 2008 | |||||
| Teff 6065.0 +50.0 -50.0 K |
Log(g) 4.36 +0.01 -0.01 cm/s2 |
Fe/H 0.0 +0.05 -0.05 dex |
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| ExoClock Status | |||||
|---|---|---|---|---|---|
| Observing Priority | LOW | ||||
| Minimum aperture | 5.0" | ||||
| Total Observations (Recent) | 36 (4) | ||||
| O-C | -0.7 ± 0.53 minutes | ||||
| ExoClock Observations (Recent) | 11 (4) | ||||
| Space Observations (Recent) | 0 (0) | ||||
| ETD Observations (Recent) | 9 (0) | ||||
| Literature Mid-times (Recent) | 16 (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 |
|
|---|---|---|---|---|
| HD209458b (LOW) 2023-07-14 | Giovanni Calapai Home Astronomical Observatory | Celestron 11 Schmidt-Cassegrain Atik 314L+ / Clear / 100.0 | 0.1 ± 0.86 | |
| HD209458b (LOW) 2022-09-21 | Lionel Rousselot Private observatory Vierzon | Newton 250/1000 ZWO 1600 monochrome / R / 60.0 | -0.05 ± 1.11 | |
| HD209458b (LOW) 2022-07-23 | Eric Miny BLOIS SOLOGNE ASTRONOMIE OBSERVATORY | Newton T305 QSI 683WS / H / 60.0 | -1.16 ± 1.58 | |
| HD209458b (LOW) 2022-07-23 | Matthieu Bachschmidt Gonachon | Celestron C11 SBIG ST8XME / AstrodonExoPlanet-BB / 10.0 | -2.16 ± 1.01 | |
| HD209458b (LOW) 2020-10-09 | Martin Smith Heathwood Road | Skywatcher 120mm ED Apochromatic Atik 414 ex / R / 1.2 | -1.2 ± 4.32 | |
| HD209458b (LOW) 2020-08-10 | Carmelo Falco GALHassin Robotic Telescope 2 (GRT2) | Giacometti-Fogale RC16 Andor Apogee Aspen CG16M / Lum / 45.0 | 2.89 ± 0.86 | |
| HD209458b (LOW) 2020-08-03 | Carmelo Falco GALHassin Robotic Telescope 2 (GRT2) | Giacometti-Fogale RC16 Andor Apogee Aspen CG16M / Lum / 60.0 | -1.72 ± 1.44 | |
| HD209458b (LOW) 2018-08-29 | Anaël Wünsche Observatoire des Baronnies Provençales | Astelco FLIPL230 / AstrodonExoPlanet-BB / 30.0 | 2.61 ± 1.01 | |
| HD209458b (LOW) 2018-08-29 | Yves Jongen Rasteau Observatory | Plane Wave CDK 17" SBIG STXL 11002 / V / 120.0 | 0.31 ± 1.58 | |
| HD209458b (LOW) 2009-10-30 | Filip Walter Stefanik Observatory | Meade SCT SBIG ST-10XME / Clear / 60.0 | -2.8 ± 1.58 | |
| HD209458b (LOW) 2008-11-22 | Alessandro Marchini Astronomical Observatory University of Siena | Mak-Cas 0.3m f/5.6 Sbig STL-6303 / R / 120.0 | -2.65 ± 2.16 | |
ETD Observations |
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| Planet Observation Date |
Observer(s) | ETD link | O-C minutes |
|
| HD209458b (LOW) 2018-08-22 | Gabriel Murawski | 1535045428 | -1.85 ± 0.58 | |
| HD209458b (LOW) 2017-10-30 | Didier Walliang | 1514914047 | -1.91 ± 1.15 | |
| HD209458b (LOW) 2013-08-01 | Jaroslav Trnka | 1375471137 | 2.71 ± 1.3 | |
| HD209458b (LOW) 2013-08-01 | Bernd Koch | 1375789889 | -0.61 ± 0.72 | |
| HD209458b (LOW) 2012-08-18 | Ramon Naves | 1345269122 | 2.43 ± 0.58 | |
| HD209458b (LOW) 2012-08-18 | Fabio Salvaggio | 1345650323 | 0.27 ± 0.72 | |
| HD209458b (LOW) 2010-09-06 | Ramon Naves | 1283797732 | -2.46 ± 0.72 | |
| HD209458b (LOW) 2004-07-13 | Osamu OHSHIMA | 1238767553 | -2.22 ± 1.73 | |
| HD209458b (LOW) 2001-10-23 | Devyatkin A.V., Gorshanov D. L. | 1306841647 | 4.22 ± 2.3 | |
Literature Mid-times |
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| Planet Observation Date |
Reference | O-C minutes |
||
| 2012-09-25 | Deming et al. 2013 | -0.17 ± 0.26 | ||
| 2005-09-13 | Miller-Ricci et al. 2008 | -0.17 ± 1.14 | ||
| 2005-09-09 | Miller-Ricci et al. 2008 | 0.46 ± 1.08 | ||
| 2005-09-06 | Miller-Ricci et al. 2008 | -0.16 ± 0.94 | ||
| 2005-09-02 | Miller-Ricci et al. 2008 | -0.55 ± 0.89 | ||
| 2005-08-30 | Miller-Ricci et al. 2008 | -0.55 ± 0.81 | ||
| 2005-08-26 | Miller-Ricci et al. 2008 | -0.59 ± 0.81 | ||
| 2005-08-23 | Miller-Ricci et al. 2008 | 0.4 ± 0.79 | ||
| 2005-08-19 | Miller-Ricci et al. 2008 | -0.71 ± 0.89 | ||
| 2005-08-16 | Miller-Ricci et al. 2008 | 1.48 ± 0.76 | ||
| 2005-08-12 | Miller-Ricci et al. 2008 | 0.15 ± 0.86 | ||
| 2005-08-08 | Miller-Ricci et al. 2008 | 1.18 ± 0.73 | ||
| 2005-08-05 | Miller-Ricci et al. 2008 | 1.13 ± 1.07 | ||
| 2004-08-28 | Miller-Ricci et al. 2008 | 0.51 ± 0.88 | ||
| 2004-08-25 | Miller-Ricci et al. 2008 | -0.69 ± 0.71 | ||
| 2004-08-17 | Miller-Ricci et al. 2008 | -0.78 ± 0.98 | ||