Astronomy:WASP-66
| Observation data Equinox J2000.0]] (ICRS) | |
|---|---|
| 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[1] mas |
| 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 | |
| Database references | |
| SIMBAD | data |
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]
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 astronomical unit|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
- ↑ 1.0 1.1 1.2 1.3 1.4 Vallenari, A. et al. (2022). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy & Astrophysics. doi:10.1051/0004-6361/202243940 Gaia DR3 record for this source at VizieR.
- ↑ Høg, E. (2000). "The Tycho-2 catalogue of the 2.5 million brightest stars". Astronomy and Astrophysics 355: L27–L30. Bibcode: 2000A&A...355L..27H.
- ↑ "Notes on WASP-66 b". Extrasolar Planets Encyclopaedia. 1995. https://exoplanet.eu/catalog/wasp_66_b--932/.
- ↑ 4.0 4.1 4.2 4.3 4.4 4.5 Bonomo, A. S. et al. (2017). "The GAPS Programme with HARPS-N at TNG". Astronomy & Astrophysics 602: A107. doi:10.1051/0004-6361/201629882. Bibcode: 2017A&A...602A.107B.
- ↑ 5.0 5.1 5.2 Delgado Mena, E. (2015). "Li abundances in F stars: planets, rotation, and Galactic evolution". Astronomy & Astrophysics 576: A69. doi:10.1051/0004-6361/201425433. Bibcode: 2015A&A...576A..69D.
- ↑ 6.0 6.1 "KOI-952". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=KOI-952.
- ↑ 7.0 7.1 Hellier, Coel (2012). "Seven transiting hot Jupiters from WASP-South, Euler and TRAPPIST: WASP-47b, WASP-55b, WASP-61b, WASP-62b, WASP-63b, WASP-66b and WASP-67b". Monthly Notices of the Royal Astronomical Society 426 (1): 739–750. doi:10.1111/j.1365-2966.2012.21780.x. Bibcode: 2012MNRAS.426..739H.
- ↑ Evans, D. F. et al. (2017). "High-resolution Imaging of Transiting Extrasolar Planetary systems (HITEP)". Astronomy & Astrophysics 610: A20. doi:10.1051/0004-6361/201731855. Bibcode: 2018A&A...610A..20E.
- ↑ Addison, B. C.; Tinney, C. G.; Wright, D. J.; Bayliss, D. (2016). "SPIN–ORBIT ALIGNMENT FOR THREE TRANSITING HOT JUPITERS: WASP-103b, WASP-87b, and WASP-66b". The Astrophysical Journal 823 (1): 29. doi:10.3847/0004-637X/823/1/29. Bibcode: 2016ApJ...823...29A.
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