WASP-43
WASP-43 is a K-type star about 284 light-years (87 parsecs) away in the Sextans constellation. It is about half the size of the Sun, and has approximately half the mass. WASP-43 has one known planet in orbit, a Hot Jupiter called WASP-43b. At the time of publishing of WASP-43b's discovery on April 15, 2011, the planet was the most closely orbiting Hot Jupiter discovered. The small orbit of WASP-43b is thought to be caused by WASP-43's unusually low mass. WASP-43 was first observed between January and May 2009 by the SuperWASP project, and was found to be cooler and slightly richer in metals than the Sun. WASP-43 has also been found to be an active star that rotates at a high velocity.
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Sextans |
| Right ascension | 10h 19m 38.00889s |
| Declination | −09° 48′ 22.6058″ |
| Apparent magnitude (V) | 12.4 |
| Characteristics | |
| Spectral type | K7V |
| Astrometry | |
| Radial velocity (Rv) | −3.42±0.55 km/s |
| Proper motion (μ) | RA: −41.992(18) mas/yr Dec.: −38.004(18) mas/yr |
| Parallax (π) | 11.4740 ± 0.0163 mas |
| Distance | 284.3 ± 0.4 ly (87.2 ± 0.1 pc) |
| Details | |
| Mass | 0.723+0.028 −0.031 M☉ |
| Radius | 0.6747+0.0086 −0.0097 R☉ |
| Surface gravity (log g) | 4.639±0.01 cgs |
| Temperature | 4286+34 −40 K |
| Metallicity [Fe/H] | 0.28+0.19 −0.21 dex |
| Rotational velocity (v sin i) | 15.6 (± 0.4) km/s |
| Age | ? Gyr |
| Other designations | |
| Database references | |
| SIMBAD | data |
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