Planet WASP-121 b

Name WASP-121 b
Planet Status Confirmed
Discovered in 2015
Mass 1.184 ( -0.064 +0.065 ) MJ
Mass*sin(i) 1.183 ( -0.064 +0.064 ) MJ
Semi-Major Axis 0.02544 (± 0.0005) AU
Orbital Period 1.2749255 (± 2.5e-07) day
Eccentricity 0.0
ω
Tperi
Radius 1.865 ( -0.044 +0.044 ) RJ
Inclination 87.6 (± 0.6) deg
Update 2018-10-26
Detection Method Primary Transit
Mass Detection Method Radial Velocity
Radius Detection Method Primary Transit
Primary transit 2456635.70832 (± 0.0001) JD
Secondary transit
λ 107.2 (± 5.0) deg
Impact Parameter b
Time Vr=0
Velocity Semiamplitude K 181.1 (± 6.4) m/s
Calculated temperature
Measured temperature
Hottest point longitude
Geometric albedo
Surface gravity log(g/gH)
Alternate Names

Star

WASP-121
Name WASP-121
Distance 270.0 (± 90.0) pc
Spectral type F6V
Apparent magnitude V 10.4
Mass 1.353 ( -0.079 +0.06 ) MSun
Age
Effective temperature 6460.0 (± 140.0) K
Radius 1.458 (± 0.03) RSun
Metallicity [Fe/H] 0.13 (± 0.09)
Detected Disc
Magnetic Field
RA2000 07:10:24.0
Dec2000 -39:05:51
Alternate Names
Planetary system 1 planet

More data

Atmospheric parameters

Temperatures

Data Source Type Result Value Result Figure Notes Reference

Molecules

Molecule Data Source Type Result Value Result Figure Notes Reference
H2O Measurements Detected 2016 - EVANS Th.
SH Measurements Detected 2018 - EVANS Th.
TiO Measurements Detected 2018 - EVANS Th.
Measurements Detected 2016 - EVANS Th.
VO Measurements Detected 2018 - EVANS Th.
Measurements Detected 2016 - EVANS Th.

Observability Predictor


Related publications

From thermal dissociation to condensation in the atmospheres of ultra hot Jupiters: WASP-121b in context
2018 PARMENTIER V., LINE M., BEAN J., MANSFIELD M., KREIDBERG L. et al.
Astron. & Astrophys., submitted
arxiv  

An optical transmission spectrum for the ultra-hot Jupiter WASP-121b measured with the Hubble Space Telescope
2018 EVANS Th., SING D., GOYAL J., NIKOLOV N., MARLEY M. et al.
Astron. J., 156, 283
paper  arxiv  

An ultrahot gas-giant exoplanet with a stratosphere
2017 EVANS Th., SING D., KATARIA T., GOYAL J., NIKOLOV N. et al.
Nature, 548, 58
paper  arxiv  

WASP-121 b: a hot Jupiter in a polar orbit and close to tidal disruption
2016 DELREZ L., SANTERNE A., ALMENARA J.-M., ANDERSON D., COLLIER-CAMERON A. et al.
MNRAS, 458, 4025
paper  arxiv   ADS

Nonlinear tides in a homogeneous rotating planet or star: global simulations of the elliptical instability
2016 BARKER A.
MNRAS, 459, 939
paper  arxiv  ADS  

Detection of H2O and evidence for TiO/VO in an ultra hot exoplanet atmosphere
2016 EVANS Th., SING D., WAKEFORD H., NIKOLOV N., BALLESTER G. et al.
ApJ Letters, 822, L4
paper  arxiv  ADS