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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]
Spectral type F4.5 V [3]
Proper motion (μ) RA: 11.452 [1]  mas/ yr
Dec.: −13.476 [1]  mas/ yr
Parallax (π)1.9962 ± 0.0313  mas [1]
Distance1,630 ± 30  ly
(501 ± 8  pc)
Details [4]
Mass1.30±0.07  M
Radius1.75±0.09  R
Surface gravity (log g)5.00 [5]  cgs
Temperature6,600±150  K
Metallicity [Fe/H]0.05 [5]  dex
Rotational velocity (v sin i)13.4±0.9 km/s
Other designations
TYC 7193-1804-1, 2MASS J10325399-3459234 [6]
Database references

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
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]
(in order from star)
Mass Semimajor axis
( AU)
Orbital period
( days)
Eccentricity Inclination Radius
b 2.37±0.14  MJ 0.05461+0.00099
4.0860520±0.000007 <0.046 85.9±0.9 ° 1.09+0.25


  1. ^ a b c d e Vallenari, A.; et al. (Gaia Collaboration) (2022). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy & Astrophysics. arXiv: 2208.00211. doi: 10.1051/0004-6361/202243940. Gaia DR3 record for this source at VizieR.
  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.
  3. ^ "Notes on WASP-66 b". Retrieved 1 February 2017.
  4. ^ a b c d e f 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.
  5. ^ a b c 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.
  6. ^ a b "KOI-952". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 21 January 2017.
  7. ^ a b 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.
  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.
  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.