Planet HD 209458 b

Detailed information about planet HD 209458 b and its parameters.

Planet

Name
HD 209458 b
Planet Status
Confirmed
Discovered in
1999
Update
2024-11-19
Mass
0.69 ( +0.017 -0.017 ) MJ
Mass*sin(i)
Semi-Major Axis
Orbital Period
Eccentricity
ω
Tperi
Radius
Inclination
Detection Method
Radial Velocity
Mass Meas. Method
Radial Velocity
Radius Meas. Method
Primary Transit
Primary transit
Secondary transit
λ
Impact Parameter b
Time Vr=0
Velocity Semiamplitude K
Calculated temperature
Measured temperature
Hottest point longitude
Geometric albedo
0.096 ( ± 0.016 )
Surface gravity log(g/gH)
Alternate Names
Data Source Type Result Value Result Figure Notes Reference
Molecule Data Source Type Result Value Result Figure Notes Reference
C
Measurements Detected 2015 - RIMMER P. & HELLING Ch.
Measurements Detected 2015 - BENNEKE B.
C2H2
Measurements Detected 2021 - GIACCOBE P.
Ca
Measurements Detected 2022 - LIRA-BARRIA A.
CH4
Measurements Detected 2021 - GIACCOBE P.
Measurements Detected 2016 - CRIDLAND A.
Measurements Detected 2015 - RIMMER P. & HELLING Ch.
CO
Measurements Detected 2021 - GIACCOBE P.
Measurements Detected 2019 - GANDHI S.
Measurements Detected 2016 - CRIDLAND A.
Measurements Detected 2015 - RIMMER P. & HELLING Ch.
CO2
Measurements Detected 2019 - GANDHI S.
Measurements Detected 2016 - CRIDLAND A.
Measurements Detected 2015 - RIMMER P. & HELLING Ch.
Fe
Measurements Detected 2020 - CUBILLOS P.
Fe+
Measurements Detected Controversial see Guillot et al. 2022 2020 - CUBILLOS P.
H
Measurements Detected 2015 - RIMMER P. & HELLING Ch.
Measurements Detected 2013 - ASTUDILLO-DEFRU N. & ROJO P.
Measurements Detected 2003 - VIDAL-MADJAR A.
H2
Modeling Detected 2019 - WELBANKS L. & MADHUSUDHAN N.
Modeling Detected 2019 - WELBANKS L. & MADHUSUDHAN N.
Measurements Detected 2015 - RIMMER P. & HELLING Ch.
H2O
Measurements Detected 2021 - GIACCOBE P.
Modeling Detected 2019 - WELBANKS L. & MADHUSUDHAN N.
Modeling Detected 2019 - WELBANKS L. & MADHUSUDHAN N.
Measurements Detected 2019 - SANCHEZ-LOPEZ A.
Measurements Detected 2019 - GANDHI S.
Measurements Detected 2016 - CRIDLAND A.
Measurements Detected 2015 - RIMMER P. & HELLING Ch.
Measurements Detected 2009 - BEAULIEU J.-Ph.
HCN
Measurements Detected 2021 - GIACCOBE P.
Measurements Detected 2019 - GANDHI S.
Measurements Detected 2017 - MACDONALD R. & MADHUSUDHAB N.
Measurements Detected 2015 - RIMMER P. & HELLING Ch.
He
Measurements Detected 2023 - XING L. YAN D. & GUO J.
Modeling Detected 2019 - WELBANKS L. & MADHUSUDHAN N.
Modeling Detected 2020 - LAMPON M.
K
Modeling Detected 2019 - WELBANKS L. & MADHUSUDHAN N.
Modeling Detected 2019 - WELBANKS L. & MADHUSUDHAN N.
Measurements Detected 2015 - RIMMER P. & HELLING Ch.
Mg
Measurements Detected Controversial, see Cubillo et al. 2020 2015 - RIMMER P. & HELLING Ch.
Measurements Detected 2014 - BOURRIER V.
Measurements Detected 2013 - VIDAL-MADJAR A.
Mn
Measurements Detected 2022 - LIRA-BARRIA A.
Measurements Detected 2022 - LIRA-BARRIA A.
Na
Measurements Detected 2020 - SANTOS N.
Modeling Detected 2019 - WELBANKS L. & MADHUSUDHAN N.
Modeling Detected 2019 - WELBANKS L. & MADHUSUDHAN N.
Measurements Detected Controversial, see Casasayas-Barris et al. 2020 2015 - RIMMER P. & HELLING Ch.
Measurements Detected 2002 - CHARBONNEAU D.
Modeling Detected 2020 - CASASAYAS-BARRIS N.
NH3
Measurements Detected 2017 - MACDONALD R. & MADHUSUDHAB N.
O2
Measurements Detected 2015 - RIMMER P. & HELLING Ch.
O I
Measurements Detected 2015 - BENNEKE B.
Measurements Detected 2015 - RIMMER P. & HELLING Ch.
Sc
Measurements Detected 2022 - LIRA-BARRIA A.
TiO
Measurements Detected 2020 - SANTOS N.
Measurements Detected 2015 - RIMMER P. & HELLING Ch.
Measurements Detected 2008 - DESERT J.-M.
V
Measurements Detected 2022 - LIRA-BARRIA A.
VO
Measurements Detected 2015 - RIMMER P. & HELLING Ch.
Measurements Detected 2008 - DESERT J.-M.

June 12: Crossfield et al (2012) estimate an average day side brightness temperature of 1320 +/- 80K.
22 Mar 05: Direct thermal emission found with Spitzer by Deming et al (2005)
4 Feb 04: Oxygen and Carbon detected in the atmosphere (Vidal-Madjar et al 2004)
Nov 01: Na detected in the planet atmosphere (Charbonneau et al 2001)
12 Mar. 03: Detection of an extended cometary-shaped atmosphere (Vidal Madjar et al 2003)
(Comment: the cometary shape was predicted in 1997 (Schneider et al 1998) - Reply)