Planet WASP-121 b

Name	WASP-121 b
Planet Status	Confirmed
Discovered in	2015
Mass	1.184 ( _-0.064 ^+0.065 ) M_J
Mass*sin(i)	1.183 ( _-0.064 ^+0.064 ) M_J
Semi-Major Axis	0.02544 (± 0.0005) AU
Orbital Period	1.2749255 (± 2.5e-07) day
Eccentricity	0.02 (± 0.015)
ω	—
T_peri	—
Radius	1.865 ( _-0.044 ^+0.044 ) R_J
Inclination	87.6 (± 0.6) deg
Update	2019-01-09
Detection Method	Primary Transit
Mass Detection Method	Radial Velocity
Radius Detection Method	Primary Transit
Primary transit	2456635.70832 (± 0.0001) JD
Secondary transit	2457778.67903 JD
λ	107.2 (± 5.0) deg
Impact Parameter b	—
Time V_r=0	—
Velocity Semiamplitude K	181.1 (± 6.4) m/s
Calculated temperature	—
Measured temperature	—
Hottest point longitude	—
Geometric albedo	—
Surface gravity log(g/g_H)	—
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 ) M_Sun
Age	—
Effective temperature	6460.0 (± 140.0) K
Radius	1.458 (± 0.03) R_Sun
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

Simbad
Most recent references (ADS)

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.
TiO	Measurements	Detected				2016 - EVANS Th.
VO	Measurements	Detected				2018 - EVANS Th.
VO	Measurements	Detected				2016 - EVANS Th.

Related publications

New Avenues for Thermal Inversions in hot Jupiters
2019 GANDHI S. & MADHUSUDHAN N.
MNRAS, 485, 5817
paper arxiv

The secondary transit of the hot Jupiter WASP-121b at 2 μm
2019 KOVACS G.L & KOVACS T.
Astron. & Astrophys., in press
paper arxiv

Swift UVOT near-UV transit observations of WASP-121 b
2019 SALZ M., SCHNEIDER P., FOSSATI L., CZESAL S., FRANCE K. & SCHMITT J.
Astron. & Astrophys., in press, 623
paper arxiv

Low albedos of hot to ultra-hot Jupiters in the optical to near-infrared transition regime
2019 MALLON M., KÖHLER J., ALEXOUDI X., von ESSEN C., GRANZER T. et al.
Astron. & Astrophys., 624, A62
paper arxiv

Cloud Atlas: Hubble Space Telescope Near-Infrared Spectral Library of Brown Dwarfs, Planetary-mass companions, and hot Jupiters
2019 MANJAVACAS E., APAI D., ZHOU Y., LEW B., SCHNEIDER G. et al.
Astron. J., 157, 101
paper arxiv

Detectability of shape deformation in short-period exoplanets
2019 AKINSANMI B., BARROS S., SANTOS N., CORREIA A., MAXTED et al.
Astron. & Astrophys., 621, A117
paper arxiv

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

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

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

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