WASP-121 Overview
WASP-121
1.59
R⦿
6396.07
K
WASP-121 b
1.742
RJup
- Architecture
- WASP-121
- WASP-121
Discovery Data
| Host | Planet | Orbital Separation | Planet Size | Method | Year | Reference | Disposition |
|---|---|---|---|---|---|---|---|
| WASP-121 | WASP-121 b | 1.27 d | 19.53 R⨁ | Transit | 2016 | Delrez et al. 2016 | Confirmed Planet |
- RA
- 07h10m24.06s
- Dec
- -39d05m50.17s
- Distance
-
269.898+1.580-1.562pc
- Parallax
- 3.67631±0.02140 mas
- Ecliptic Latitude
- -60.79207 deg
- Ecliptic Longitude
- 118.73972 deg
- Galactic Latitude
- -13.32514 deg
- Galactic Longitude
- 250.2937 deg
- Total Proper Motion
- 25.8940345±0.0415779 mas/yr
- Proper Motion (RA)
- -3.8481400±0.0395031 mas/yr
- Proper Motion (Dec)
- 25.6065000±0.0416236 mas/yr
- Photometry
-
mV10.514±0.006
-
mTESS10.056±0.006
-
mJ9.625±0.021
-
mH9.439±0.025
-
mKs9.374±0.022
-
mW19.356±0.023
-
mW29.387±0.019
-
mW39.383±0.035
-
mW49.175±0.511
-
mGaia10.374600±0.000426
-
mB10.997±0.088
-
Abundances
(Hypatia Catalog) -
[Fe/H] 0.23±0.04 dex
-
[C/H] 0.04±0.09 dex
-
[O/H] 0.35±0.09 dex
-
[Na/H] 0.04±0.04 dex
-
[Mg/H] 0.14±0.07 dex
-
[Al/H] -0.12±0.06 dex
-
[Si/H] 0.22±0.05 dex
-
[Ca/H] 0.25±0.06 dex
-
[Y/H] 0.30±0.08 dex
| Source | Sing et al. 2024 | Bourrier et al. 2020 | TICv8 | Mikal-Evans et al. 2019 | Gaia DR2 | Evans et al. 2017 | Delrez et al. 2016 | ExoFOP-TESS TOI | Show Candidate Solutions >> | << Hide Candidate Solutions |
|---|---|---|---|---|---|---|---|---|---|---|
|
Teff
(K)
|
6628±66 | --- |
6776.000+138.386-128.733
|
--- |
6396.0664+121.3340-133.1460
|
--- | 6459±140 | 6459 | ||
|
L✶
(log10(L⦿))
|
--- | --- |
0.6437183+0.0203923-0.0206833
|
--- |
0.58254650+0.00456161-0.00461005
|
--- |
0.52+0.04-0.04
|
--- | ||
|
γ
(km/s)
|
--- | --- | --- | --- | 38.361891375062100±0.429049318636689 | --- | 38.350±0.021 | --- | ||
|
R✶
(R⦿)
|
1.461±0.005 | 1.458±0.030 |
1.5225300+0.0635312-0.0574337
|
--- |
1.5925753+0.0684345-0.0587456
|
1.458 | 1.458±0.030 | 1.52±0.06 | ||
|
Metallicity
(dex)
|
0.17±0.05 [Fe/H] | --- | --- | 0.13±0.09 [Fe/H] | --- | --- | 0.13±0.09 [Fe/H] | --- | ||
|
v sin i
(km/s)
|
--- | --- | --- | --- | --- | --- | 13.5±0.7 | --- | ||
|
Age
(Gyr)
|
1.11±0.14 | --- | --- | --- | --- | --- | 1.5±1.0 | --- | ||
|
ρ✶
(g/cm3)
|
0.6308±0.0034 | 0.612±0.054 |
0.5792130+0.1795921-0.0898028
|
--- | --- | --- |
0.616+0.011-0.013
|
--- | ||
|
M✶
(M⦿)
|
1.330±0.019 |
1.358+0.075-0.084
|
1.450000+0.314714-0.190326
|
--- | --- | --- |
1.353+0.080-0.079
|
--- | ||
|
log g
(log10(cm/s2))
|
4.251±0.003 | --- |
4.2343100+0.1126880-0.0625987
|
--- | --- | --- |
4.242+0.011-0.012
|
4.24006 | ||
|
Sp. T
|
--- | --- | --- | --- | --- | --- | F6 V | --- | ||
|
Prot
(days)
|
--- | <1.13 | --- | --- | --- | --- | --- | --- |
- Status
- Confirmed Planet
- Detected By
- Radial Velocity, Transit
| Source | Sing et al. 2024 | Kokori et al. 2023 | Patel & Espinoza 2022 | Ivshina & Winn 2022 | Kokori et al. 2022 | Bourrier et al. 2020 | Mikal-Evans et al. 2019 | Evans et al. 2017 | Delrez et al. 2016 | Evans et al. 2016 | ExoFOP-TESS TOI | Show Candidate Solutions >> | << Hide Candidate Solutions |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
a/R✶
|
3.7844±0.0069 |
3.754+0.023-0.028
|
3.81+0.01-0.02
|
--- | --- |
3.8131+0.0075-0.0060
|
3.86 | 3.825 |
3.754+0.023-0.028
|
3.754 | --- | ||
|
Teq
(K)
|
2409±24 | --- | --- | --- | --- | --- | 2720±8 | --- | 2358±52 | --- | 2473 | ||
|
b
|
--- | --- |
0.0910+0.0520-0.0570
|
--- | --- | 0.10±0.01 | 0.06 | 0.073 |
0.160+0.040-0.042
|
0.160 | --- | ||
|
Mp
(M⨁)
|
371.9±13.7 | --- | --- | --- | --- | 367.7±22.2 | --- | --- |
376.0+20.3-19.7
|
--- | --- | ||
|
Mp
(MJup)
|
1.170±0.043 | --- | --- | --- | --- | 1.157±0.070 | --- | --- |
1.183+0.064-0.062
|
--- | --- | ||
|
Occ. Depth
(%)
|
--- | --- | --- | --- | --- | --- | 0.0682±0.0073 |
0.1132+0.0037-0.0035
|
0.0603±0.0130 | --- | --- | ||
|
e
|
--- | --- | --- | --- | --- | 0 | --- | 0 | 0 | --- | --- | ||
|
i
(deg)
|
--- | 87.6±0.6 | --- | --- | --- | 88.49±0.16 | 89.1 | 88.91 | 87.6±0.6 | 87.557 | --- | ||
|
P
(days)
|
1.27492504±0.00000015 | 1.274924762±0.000000046 | 1.2749250±0.0000001 | 1.27492483±0.00000011 | 1.27492477±0.00000012 |
1.27492504+0.00000015-0.00000014
|
1.2749255 | 1.2749255 |
1.27492550+0.00000020-0.00000025
|
--- | 1.2749246±0.0000003 | ||
|
ρ
(g/cm3)
|
0.275±0.010 | --- | --- | --- | --- |
0.266+0.024-0.022
|
--- | --- | 0.243±0.021 | --- | --- | ||
|
Rp
(R⨁)
|
19.526±0.067 | --- | --- | --- | --- | 19.65±0.40 | 20 | 18.99 | 20.90±0.49 | --- | 22.032800±0.876995 | ||
|
Rp
(RJup)
|
1.7420±0.0060 | --- | --- | --- | --- | 1.753±0.036 | 1.8 | 1.694 | 1.865±0.044 | --- | 1.9656381±0.0782404 | ||
|
Rp/R✶
|
0.122551±0.000063 | 0.1245±0.0005 | 0.1217±0.0003 | --- | --- |
0.12355+0.00033-0.00029
|
--- | --- |
0.12454+0.00047-0.00048
|
0.12109+0.00031-0.00032
|
--- | ||
|
a
(au)
|
0.02571±0.00010 | --- | --- | --- | --- |
0.02596+0.00043-0.00063
|
0.025 | --- |
0.02544+0.00049-0.00050
|
--- | --- | ||
|
δ
(%)
|
1.5018±0.0015 | --- | --- | --- | --- | --- | --- | --- | 1.551±0.012 | --- | 1.86990000±0.00868734 | ||
|
T14
(hours)
|
--- | --- | --- | --- | --- |
2.9053+0.0065-0.0059
|
--- | --- | 2.887±0.007 | --- | 2.783±0.038 | ||
|
TC
(days)
|
--- |
2458661.563783±0.000030
(BJD-TDB)
|
2459253.12891±0.00004
(BJD)
|
2457705.37012±0.00012
(BJD-TDB)
|
2457404.48798±0.00006
(BJD-TDB)
|
2458119.72074±0.00017
(BJD-TDB)
|
--- | --- |
2456635.70832+0.00011-0.00010
(HJD)
|
2457424.88307+0.00010-0.00011
(HJD-UTC)
|
2459986.2106200±0.0001842
(BJD)
|
||
|
λ
(deg)
|
--- | --- | --- | --- | --- |
87.20+0.41-0.45
|
--- | --- |
-257.8 +5.3-5.5
|
--- | --- | ||
|
K
(m/s)
|
181.1±6.4 | --- | --- | --- | --- |
177.0+8.5-8.1
|
--- | --- | --- | --- | --- | ||
|
ω
(deg)
|
--- | --- | --- | --- | --- | 10±10 | --- | --- | --- | --- | --- | ||
|
S
(S⨁)
|
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | 6216.41 |
- Known Objects
- 1 Confirmed Planets
- 5 2MASS Point Source Catalog
- Data Files
- 1 Associated Literature Data
-
WASP-121 b's Transmission Spectrum Observed with JWST/NIRSpec G395H Reveals Thermal Dissociation and SiO in the Atmosphere
Gapp et al. 2025 | Reference Overview -
An Absolute Mass, Precise Age, and Hints of Planetary Winds for WASP-121A and b from a JWST NIRSpec Phase Curve
Sing et al. 2024 | Reference Overview -
Exploring the Ability of Hubble Space Telescope WFC3 G141 to Uncover Trends in Populations of Exoplanet Atmospheres through a Homogeneous Transmission Survey of 70 Gaseous Planets
Edwards et al. 2023 | Reference Overview -
ExoClock Project. III. 450 New Exoplanet Ephemerides from Ground and Space Observations
Kokori et al. 2023 | Reference Overview -
Empirical Limb-darkening Coefficients and Transit Parameters of Known Exoplanets from TESS
Patel & Espinoza 2022 | Reference Overview -
Five Key Exoplanet Questions Answered via the Analysis of 25 Hot-Jupiter Atmospheres in Eclipse
Changeat et al. 2022 | Reference Overview -
TESS Transit Timing of Hundreds of Hot Jupiters
Ivshina & Winn 2022 | Reference Overview -
ExoClock Project. II. A Large-scale Integrated Study with 180 Updated Exoplanet Ephemerides
Kokori et al. 2022 | Reference Overview -
A unique hot Jupiter spectral sequence with evidence for compositional diversity
Mansfield et al. 2021 | Reference Overview -
Gemini/GMOS optical transmission spectroscopy of WASP-121b: signs of variability in an ultra-hot Jupiter?
Wilson et al. 2021 | Reference Overview -
Confirmation of water emission in the dayside spectrum of the ultrahot Jupiter WASP-121b
Mikal-Evans et al. 2020 | Reference Overview -
Statistical Characterization of Hot Jupiter Atmospheres Using Spitzer's Secondary Eclipses
Garhart et al. 2020 | Reference Overview -
Hot Exoplanet Atmospheres Resolved with Transit Spectroscopy (HEARTS). III. Atmospheric structure of the misaligned ultra-hot Jupiter WASP-121b
Bourrier et al. 2020 | Reference Overview -
The Revised TESS Input Catalog and Candidate Target List
TICv8 | Reference Overview -
An emission spectrum for WASP-121b measured across the 0.8-1.1 μm wavelength range using the Hubble Space Telescope
Mikal-Evans et al. 2019 | Reference Overview -
The Hubble Space Telescope PanCET Program: Exospheric Mg II and Fe II in the Near-ultraviolet Transmission Spectrum of WASP-121b Using Jitter Decorrelation
Sing et al. 2019 | Reference Overview -
Gaia Data Release 2
Gaia DR2 | Reference Overview -
An ultrahot gas-giant exoplanet with a stratosphere
Evans et al. 2017 | Reference Overview -
ExoFOP-TESS TOI Table
ExoFOP-TESS TOI -
WASP-121 b: a hot Jupiter close to tidal disruption transiting an active F star
Delrez et al. 2016 | Reference Overview -
Detection of H2O and Evidence for TiO/VO in an Ultra-hot Exoplanet Atmosphere
Evans et al. 2016 | Reference Overview -
All WISE Data Release
Cutri et al. 2014 | Reference Overview -
2MASS All-Sky Catalog of Point Sources
2MASS Point Source Catalog | Reference Overview
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- Candidate
- False Positive Planet
- Controversial
- False Positive
- Aliases
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