WASP-66

WASP-66
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, 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 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]

The WASP-66 planetary system[4]
Companion (in order from star)	Mass	Semimajor axis (AU)	Orbital period (days)	Eccentricity	Inclination	Radius
b	2.37±0.14 M_J	0.05461^+0.00099 _−0.00096	4.0860520±0.000007	<0.046	85.9±0.9°	1.09^+0.25 _−0.19 R_J

References

Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv:2208.00211. Bibcode:2023A&A...674A...1G. doi:10.1051/0004-6361/202243940. S2CID 244398875. Gaia DR3 record for this source at VizieR.
Høg, E.; et al. (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". Retrieved 1 February 2017.
Bonomo, A. S.; et al. (2017). "The GAPS Programme with HARPS-N at TNG". Astronomy & Astrophysics. 602: A107. arXiv:1704.00373. Bibcode:2017A&A...602A.107B. doi:10.1051/0004-6361/201629882. S2CID 118923163.
Delgado Mena, E. (2015). "Li abundances in F stars: planets, rotation, and Galactic evolution". Astronomy & Astrophysics. 576: A69. arXiv:1412.4618. Bibcode:2015A&A...576A..69D. doi:10.1051/0004-6361/201425433. S2CID 56051637.
"KOI-952". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 21 January 2017.
Hellier, Coel; et al. (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. arXiv:1204.5095. Bibcode:2012MNRAS.426..739H. doi:10.1111/j.1365-2966.2012.21780.x. S2CID 54713354.
Evans, D. F.; et al. (2017). "High-resolution Imaging of Transiting Extrasolar Planetary systems (HITEP)". Astronomy & Astrophysics. 610: A20. arXiv:1709.07476. Bibcode:2018A&A...610A..20E. doi:10.1051/0004-6361/201731855. S2CID 53400492.
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. arXiv:1603.05754. Bibcode:2016ApJ...823...29A. doi:10.3847/0004-637X/823/1/29. S2CID 118686465.

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[dr3-1] Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv:2208.00211. Bibcode:2023A&A...674A...1G. doi:10.1051/0004-6361/202243940. S2CID 244398875. Gaia DR3 record for this source at VizieR.

[TYC2-2] Høg, E.; et al. (2000). "The Tycho-2 catalogue of the 2.5 million brightest stars". Astronomy and Astrophysics. 355: L27–L30. Bibcode:2000A&A...355L..27H.

[EU-3] "Notes on WASP-66 b". Retrieved 1 February 2017.

[Bonomo2017-4] Bonomo, A. S.; et al. (2017). "The GAPS Programme with HARPS-N at TNG". Astronomy & Astrophysics. 602: A107. arXiv:1704.00373. Bibcode:2017A&A...602A.107B. doi:10.1051/0004-6361/201629882. S2CID 118923163.

[DelgadoMena-5] Delgado Mena, E. (2015). "Li abundances in F stars: planets, rotation, and Galactic evolution". Astronomy & Astrophysics. 576: A69. arXiv:1412.4618. Bibcode:2015A&A...576A..69D. doi:10.1051/0004-6361/201425433. S2CID 56051637.

[SIMBAD-6] "KOI-952". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 21 January 2017.

[Hellier-7] Hellier, Coel; et al. (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. arXiv:1204.5095. Bibcode:2012MNRAS.426..739H. doi:10.1111/j.1365-2966.2012.21780.x. S2CID 54713354.

[Evans2017-8] Evans, D. F.; et al. (2017). "High-resolution Imaging of Transiting Extrasolar Planetary systems (HITEP)". Astronomy & Astrophysics. 610: A20. arXiv:1709.07476. Bibcode:2018A&A...610A..20E. doi:10.1051/0004-6361/201731855. S2CID 53400492.

[Addision2016-9] 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. arXiv:1603.05754. Bibcode:2016ApJ...823...29A. doi:10.3847/0004-637X/823/1/29. S2CID 118686465.