| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Cetus[1] |
| Right ascension | 00h 15m 36.76947s[2] |
| Declination | −11° 56′ 17.2848″[2] |
| Apparent magnitude (V) | 13.05[3] |
| Characteristics | |
| Evolutionary stage | main sequence[2] |
| Spectral type | G8V[4] |
| Astrometry | |
| Radial velocity (Rv) | −3.10±1.32[2] km/s |
| Proper motion (μ) | RA: 15.272(22) mas/yr[2] Dec.: −30.159(14) mas/yr[2] |
| Parallax (π) | 2.7644±0.0199 mas[2] |
| Distance | 1,180 ± 8 ly (362 ± 3 pc) |
| Details[5] | |
| Mass | 0.929+0.053 −0.050 M☉ |
| Radius | 0.923+0.021 −0.020 R☉ |
| Luminosity | 0.680+0.031 −0.029 L☉ |
| Surface gravity (log g) | 4.476±0.030 cgs |
| Temperature | 5457±46 K |
| Metallicity [Fe/H] | 0.099+0.092 −0.089 dex |
| Rotational velocity (v sin i) | 3.20±0.90[6] km/s |
| Age | 6.0+4.3 −3.8 Gyr |
| Other designations | |
| TOI-259, TIC 12862099, WASP-44, GSC 05264-00740, 2MASS J00153675-1156172[3] | |
| Database references | |
| SIMBAD | data |
| Exoplanet Archive | data |
WASP-44 is a G-type star about 1,180 light-years (360 parsecs) away in the constellation Cetus that is orbited by the Jupiter-size planet WASP-44b. The star is slightly less massive and slightly smaller than the Sun; it is also slightly cooler, but is more metal-rich. The star was observed by SuperWASP, an organization searching for exoplanets, starting in 2009; manual follow-up observations using WASP-44's spectrum and measurements of its radial velocity led to the discovery of the transiting planet WASP-44b. The planet and its star were presented along with WASP-45b and WASP-46b on May 17, 2011 by a team of scientists testing the idea that hot Jupiters tend to have circular orbits, an assumption that is made when the orbital eccentricity of such planets are not well-constrained.[4]
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