Planet WASP-12 Ab

Detailed information about planet WASP-12 Ab and its parameters.

Planet

Name
WASP-12 Ab
Planet Status
Confirmed
Discovered in
2008
Update
2024-07-29
Mass
Mass*sin(i)
1.46 ( +0.075 -0.068 ) MJ
Semi-Major Axis
Orbital Period
Eccentricity
ω
Tperi
Radius
Inclination
Detection Method
Primary Transit
Mass Meas. Method
Radial Velocity
Radius Meas. Method
Primary Transit
Primary transit
Secondary transit
λ
Impact Parameter b
Time Vr=0
Velocity Semiamplitude K
226.4 ( ± 4.1 ) m/s
Calculated temperature
Measured temperature
Hottest point longitude
Geometric albedo
0.086 ( ± 0.017 )
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 - BENNEKE B.
Ca
Measurements Detected 2024 - CZESLA S.
Modeling Detected 2020 - LOTHRINGER J.
CH4
Measurements Detected 2016 - CRIDLAND A.
Measurements Detected 2013 - STEVENSON K.
Measurements Detected 2011 - MADHUSUDHAN N.
Modeling Detected 2020 - LOTHRINGER J.
CO
Measurements Detected 2016 - CRIDLAND A.
Measurements Detected 2013 - STEVENSON K.
Measurements Detected 2011 - MADHUSUDHAN N.
CO2
Measurements Detected 2016 - CRIDLAND A.
Fe
Modeling Detected 2020 - LOTHRINGER J.
H
Measurements Detected 2024 - CZESLA S.
Measurements Detected 2018 - JENSEN A.
H2
Measurements Detected 2013 - STEVENSON K.
H2O
Measurements Detected 2016 - CRIDLAND A.
Measurements Detected 2013 - STEVENSON K.
Modeling Detected 2020 - LOTHRINGER J.
HCN
Measurements Detected 2013 - STEVENSON K.
He
Measurements Detected 2018 - KREIDBERG L. & OKLOPCIC A.
Mg
Modeling Detected 2019 - DWIVEDI N.
Na
Measurements Detected 2024 - CZESLA S.
Measurements Detected 2018 - JENSEN A.
Ni
Modeling Detected 2020 - LOTHRINGER J.
O I
Measurements Detected 2015 - BENNEKE B.
SiO
Modeling Detected 2020 - LOTHRINGER J.
Ti
Modeling Detected 2020 - LOTHRINGER J.
TiO
Measurements Detected 2013 - STEVENSON K.
Modeling Detected 2020 - LOTHRINGER J.
VO
Measurements Detected 2013 - STEVENSON K.

25 Jan 2022
Wong et al. (2022) find an orbital decay of the period of 29.81 ± ms/year
04 Apr 2019:
A change in the depth of the secondary eclipse claimed by Hooton et al. (2019)
28 Jan 2013:
A second planet is perhaps present in the system, infered from TTVs (Maciejewski et al. 2013)
20 Mar. 2010:
Campo et al (2010) have observed two secondary transits, leading to a precession rate for ω of ω'=0.02 deg./day.
Warning: The period given in the table is the present sideral period Ps.
For the calculation of future transit ephemeris TE, observers should use eqs. (7) and (8) of Campo et al. 2010.
29 Jul. 2024: See also Planets in Binaries webpage.

Star

Bechter et al. (2014): WASP-12 is the primary component of a triple system including two M dwarfs located 21 AUs away each other. The low-mass stellar pair lies 1.047 arcseconds away from the exoplanet host star (450 AUs at 430 pc).

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