Temperature
5227 K
4994.2 to 5227
←Back to Stellar Hosts
Stellar HostProfile
WASP-2
Unclassified star • 153.2 pc
Records
17
literature rows
Planets
1
system count
References
18
distinct source labels
TIC: TIC 374530847
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: Ghezzi et al. 2010 • System source: TICv8
Mass
0.80 Msun
0.79 to 0.90
Radius
0.64 Rsun
0.64 to 1.06
Age
1 Gyr
1 to 11.90
Luminosity
-0.56 log(Lsun)
-0.56 to -0.31
Distance
153.2 pc
single adopted value
Planets
1
Stable across source rows
Scale Comparison
Radius against the Sun
Current adopted radius: 0.64 R☉ (circles scaled linearly by radius)
Sun
1.0 R☉ baseline
WASP-2
0.64 R☉
System Layout
Known planets
1 planets linked to this host
WASP-2 b
Transit
◌
Discovery
2007
Period
2.15 days
Radius
12.12 R⊕
Mass
295.9 M⊕
Eq. Temp
1311 K
WASP-2 and Its Jupiter-Like Planet
WASP-2 is a K1 star 500 light-years away with one known planet. Its reported mass is 0.8 solar masses and its reported radius is 0.64 solar radii, both smaller than the Sun's. The star's reported temperature is 5230 K, cooler than the Sun's, and its age is given as a reported upper limit of 1 billion years.
The planet WASP-2 b is Jupiter-like, a size class that exceeds 4 times Earth's radius; its reported radius is 12.1 Earth radii, larger than Earth's, and its reported mass is 296 Earth masses, also larger than Earth's. It completes an orbit in 2.15 days and was discovered by transit in 2007. Its mean density is 0.916 g/cm³, 0.166 times Earth's.
Provenance
Underlying measurements and references
Evidence Summary
Rows
17
Stellar refs
17
System refs
1
Distancestable
Parallaxstable
Temperaturedisputed
Massdisputed
Radiusdisputed
Agedisputed
Luminositydisputed
Surface Gravitydisputed
Metallicitydisputed
Spectral Typedisputed
| ST TEFF | ST MASS | ST RAD | ST AGE | ST LUM | ST SPECTYPE | SY DIST | Stellar Ref | System Ref |
|---|---|---|---|---|---|---|---|---|
| 5170 | 0.85 | 0.82 | 8.20 | — | — | 153.2 | Southworth 2012 | TICv8 |
| 5147 | — | 0.85 | — | — | — | 153.2 | ExoFOP | TICv8 |
| 5150 | 0.80 | 0.81 | 11.90 | — | — | 153.2 | Southworth et al. 2010 | TICv8 |
| 5150 | 0.84 | 0.82 | — | — | K1 | 153.2 | Triaud et al. 2010 | TICv8 |
| — | 0.79 | 0.81 | — | — | — | 153.2 | Charbonneau et al. 2007 | TICv8 |
| 5200 | 0.79 | 0.78 | — | — | K1 V | 153.2 | Collier Cameron et al. 2007 | TICv8 |
| 5105 | — | — | — | — | — | 153.2 | Tsantaki et al. 2014 | TICv8 |
| 5200 | 0.89 | 0.84 | 7 | — | — | 153.2 | Bonomo et al. 2017 | TICv8 |
| 4994.2 | — | 0.91 | — | -0.34 | — | 153.2 | Gaia DR2 | TICv8 |
| — | 0.85 | — | — | — | — | 153.2 | Knutson et al. 2014 | TICv8 |
| 5150 | 0.80 | 0.81 | 11.90 | — | — | 153.2 | Southworth 2010 | TICv8 |
| 5227 | 0.80 | 0.64 | 1 | -0.56 | — | 153.2 | Ghezzi et al. 2010 | TICv8 |
| 5109 | 0.83 | 1.06 | — | — | — | 153.2 | Mortier et al. 2013 | TICv8 |
| 5147 | 0.87 | 0.85 | — | -0.34 | — | 153.2 | TICv8 | TICv8 |
| 5180 | 0.90 | 0.87 | — | -0.31 | — | 153.2 | Addison et al. 2019 | TICv8 |
| 5200 | 0.89 | 0.84 | 5.60 | -0.33 | — | 153.2 | Torres et al. 2008 | TICv8 |
| 5200 | 0.89 | 0.84 | — | — | — | 153.2 | Daemgen et al. 2009 | TICv8 |