WASP-66
Star in the constellation Antlia From Wikipedia, the free encyclopedia
WASP-66, also known as TYC 7193-1804-1, is an F-type star in the constellation Antlia. It has an apparent magnitude of 11.6,[6] which is much too faint to be seen with the unaided eye and is located at a distance of 1,630 light years.[7]
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Antlia |
| Right ascension | 10h 32m 53.993s[1] |
| Declination | −34° 59′ 23.46″[1] |
| Apparent magnitude (V) | 11.60[2] |
| Characteristics | |
| Spectral type | F4.5 V[3] |
| Astrometry | |
| Proper motion (μ) | RA: 11.452[1] mas/yr Dec.: −13.476[1] mas/yr |
| Parallax (π) | 1.9962±0.0313 mas[1] |
| Distance | 1,630 ± 30 ly (501 ± 8 pc) |
| Details[4] | |
| Mass | 1.30±0.07 M☉ |
| Radius | 1.75±0.09 R☉ |
| Surface gravity (log g) | 5.00[5] cgs |
| Temperature | 6,600±150 K |
| Metallicity [Fe/H] | 0.05[5] dex |
| Rotational velocity (v sin i) | 13.4±0.9 km/s |
| Age | 3.7+0.7 −1.2 Gyr |
| Other designations | |
| TYC 7193-1804-1, 2MASS J10325399-3459234[6] | |
| Database references | |
| SIMBAD | data |
WASP-66 has a classification of F4.5 V, which states that it is an ordinary F-type main sequence star that is fusing hydrogen at its core. At present it has 130% the mass of the Sun and 175 the radius of the Sun.[4] It has an effective temperature of 6,600 K,[4] which gives it a yellowish-white hue. The star is younger than Sun at 3.7+0.7
−1.2 billion years, and may be either metal-poor[4] or similar to Sun[5] in concentration of heavy elements. Currently it is spinning moderately with a projected rotational velocity of 13.4 km/s.[4]
According to a survey published in 2017, WASP-66 has one suspected companion - a red dwarf star with an effective temperature of 3,330±150 K and a projected separation of 6,800±700 AU.[8]
Planetary system
In 2012, a superjovian planet around WASP-66 was discovered. WASP-66b has a mass that is about 2.3 times that of Jupiter. It takes just over 4 days to complete an orbit around its star, making it a typical hot Jupiter. The planet was discovered by the transit method – this is when a planet passes in front of a star, temporarily blocking some of the star's light.[7]
The planetary orbit is well aligned with the equatorial plane of the star, the misalignment angle being equal to −4±22°.[9]
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b | 2.37±0.14 MJ | 0.05461+0.00099 −0.00096 |
4.0860520±0.000007 | <0.046 | 85.9±0.9° | 1.09+0.25 −0.19 RJ |
References
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