Temperature
5800 K
5767.6 to 5924
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Stellar HostProfile
WASP-21
Unclassified star • 258.4 pc
Records
9
literature rows
Planets
1
system count
References
10
distinct source labels
TIC: TIC 436478932
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: Ciceri et al. 2013 • System source: TICv8
Mass
0.89 Msun
0.89 to 1.08
Radius
1.14 Rsun
1.06 to 1.35
Age
12 Gyr
single adopted value
Distance
258.4 pc
single adopted value
Planets
1
Stable across source rows
Scale Comparison
Radius against the Sun
Current adopted radius: 1.14 R☉ (circles scaled linearly by radius)
Sun
1.0 R☉ baseline
WASP-21
1.14 R☉
System Layout
Known planets
1 planets linked to this host
WASP-21 b
Transit
◌
Discovery
2010
Period
4.32 days
Radius
11.99 R⊕
Mass
95.34 M⊕
Eq. Temp
—
WASP-21 and Its Planet
WASP-21 is a G3 V star located 843 light-years away. This Sun-like, main-sequence dwarf has a mass of 0.89 solar masses and a radius of 1.14 solar radii. Its temperature is 5800 K, and its age is 12 billion years. The star is known to host one planet.
That planet, WASP-21 b, was discovered by transit in 2010. It is a Jupiter-like world with a mass of 95.3 Earth masses and a radius of 12 Earth radii. Its orbital period is 4.32 days, and its mean density is 0.305 g/cm³, 0.0553 times Earth's.
Provenance
Underlying measurements and references
Evidence Summary
Rows
9
Stellar refs
9
System refs
1
Distancestable
Parallaxstable
Temperaturedisputed
Massdisputed
Radiusdisputed
Agestable
Luminositydisputed
Surface Gravitydisputed
Metallicitydisputed
Spectral Typestable
| ST TEFF | ST MASS | ST RAD | ST AGE | ST LUM | ST SPECTYPE | SY DIST | Stellar Ref | System Ref |
|---|---|---|---|---|---|---|---|---|
| 5767.6 | — | 1.18 | — | 0.14 | — | 258.4 | Gaia DR2 | TICv8 |
| 5924 | — | 1.35 | — | — | — | 258.4 | ExoFOP | TICv8 |
| — | — | — | — | — | G3 V | 258.4 | Bouchy et al. 2010 | TICv8 |
| 5800 | 0.89 | 1.14 | 12 | — | — | 258.4 | Ciceri et al. 2013 | TICv8 |
| 5924 | 0.97 | 1.08 | — | — | — | 258.4 | Mortier et al. 2013 | TICv8 |
| 5800 | 1.01 | 1.06 | 12 | — | — | 258.4 | Bonomo et al. 2017 | TICv8 |
| 5800 | 0.89 | 1.14 | — | — | — | 258.4 | Chen et al. 2020 | TICv8 |
| 5924 | 1.08 | 1.35 | — | 0.30 | — | 258.4 | TICv8 | TICv8 |
| 5800 | 0.98 | 1.19 | — | — | — | 258.4 | Southworth 2012 | TICv8 |