Temperature
6459 K
6396.1 to 6776
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Stellar HostProfile
WASP-121
F6 V • 269.9 pc
Records
8
literature rows
Planets
1
system count
References
9
distinct source labels
TIC: TIC 22529346
Approximate color
from effective temperature
Canonical Summary
Adopted host values from one source row
Values come from the row with the most populated summary measurements. Missing values stay missing. Ranges and counts describe all source rows.
Stellar source: Delrez et al. 2016 • System source: TICv8
Mass
1.35 Msun
1.33 to 1.45
Radius
1.46 Rsun
1.46 to 1.59
Age
1.50 Gyr
1.11 to 1.50
Luminosity
0.52 log(Lsun)
0.52 to 0.64
Distance
269.9 pc
single adopted value
Spectral Type
F6 V
Consistent across records
Planets
1
Stable across source rows
Scale Comparison
Radius against the Sun
Current adopted radius: 1.46 R☉ (circles scaled linearly by radius)
Sun
1.0 R☉ baseline
WASP-121
1.46 R☉
System Layout
Known planets
1 planets linked to this host
WASP-121 b
Transit
◌
Discovery
2016
Period
1.27 days
Radius
19.53 R⊕
Mass
371.9 M⊕
Eq. Temp
2409 K
WASP-121 b: A Jupiter-like World Around an F-type Star
WASP-121 is a single star located 880 light-years away, with one known planet in orbit. The host is an F6 V star, a main-sequence dwarf hotter than the Sun. It has an age of 1.5 billion years, a mass of 1.35 solar masses, a radius of 1.46 solar radii, and a temperature of 6460 K. Its mass and radius are larger than the Sun's, and its temperature is hotter.
The sole cataloged planet is WASP-121 b, a Jupiter-like world discovered in 2016 by the transit method, in which a planet crosses in front of its star and causes a small dip in observed brightness. It has a mass of 372 Earth masses, roughly 1.17 times Jupiter's mass, and a radius of 19.5 Earth radii, larger than Earth's. Its orbital period is 1.27 days.
WASP-121 b's mean density is 0.275 g/cm³, 0.05 times Earth's.
Provenance
Underlying measurements and references
Evidence Summary
Rows
8
Stellar refs
8
System refs
1
Distancestable
Parallaxstable
Temperaturedisputed
Massdisputed
Radiusdisputed
Agedisputed
Luminositydisputed
Surface Gravitydisputed
Metallicitydisputed
Spectral Typestable
| ST TEFF | ST MASS | ST RAD | ST AGE | ST LUM | ST SPECTYPE | SY DIST | Stellar Ref | System Ref |
|---|---|---|---|---|---|---|---|---|
| 6776 | 1.45 | 1.52 | — | 0.64 | — | 269.9 | TICv8 | TICv8 |
| 6459 | 1.35 | 1.46 | 1.50 | 0.52 | F6 V | 269.9 | Delrez et al. 2016 | TICv8 |
| — | — | — | — | — | — | 269.9 | Mikal-Evans et al. 2019 | TICv8 |
| 6628 | 1.33 | 1.46 | 1.11 | — | — | 269.9 | Sing et al. 2024 | TICv8 |
| — | — | 1.46 | — | — | — | 269.9 | Evans et al. 2017 | TICv8 |
| — | 1.36 | 1.46 | — | — | — | 269.9 | Bourrier et al. 2020 | TICv8 |
| 6459 | — | 1.52 | — | — | — | 269.9 | ExoFOP | TICv8 |
| 6396.1 | — | 1.59 | — | 0.58 | — | 269.9 | Gaia DR2 | TICv8 |