WASP-23

Last updated
WASP-23
Observation data
Epoch J2000.0        Equinox J2000.0
Constellation Puppis [1]
Right ascension 06h 44m 30.61336s [2]
Declination −42° 45′ 42.6668″ [2]
Apparent magnitude  (V)12.52 [3]
Characteristics
Evolutionary stage main sequence [4]
Spectral type K1V [4]
Astrometry
Radial velocity (Rv)+5.29±0.52 [2] km/s
Proper motion (μ)RA: −8.917 mas/yr [2]
Dec.: −87.711 mas/yr [2]
Parallax (π)4.8598±0.0086  mas [2]
Distance 671 ± 1  ly
(205.8 ± 0.4  pc)
Details [5]
Mass 0.78+0.13
−0.12  M☉
Radius 0.765+0.033
−0.049  R☉
Surface gravity (log g)4.4±0.2 [4]   cgs
Temperature 5,150±100  K
Metallicity [Fe/H]−0.05±0.13  dex
Rotational velocity (v sin i)2.2±0.3 km/s
Age 6.2+5.6
−2.5  Gyr
Other designations
TOI-477, TIC 170102285, WASP-23, GSC 07635-01376 [3]
Database references
SIMBAD data
Exoplanet Archive data

WASP-23 is a K1V-type main sequence star located 671 light-years from Earth in the constellation of Puppis. It has a mass of 0.84 solar masses and a radius of 0.88 solar radii. It is around 6.2 billion years old and has an effective temperature of 5046 Kelvin. [6]

Planetary system

There is only one known exoplanet orbiting this star named WASP-23b that was discovered by the transit method in the year 2010 by Triaud et al. It is a hot Jupiter with similar mass and radius to Jupiter. [4]

The WASP-23 planetary system [5]
Companion
(in order from star)		 Mass Semimajor axis
(AU)		 Orbital period
(days)		 Eccentricity Inclination Radius
b 0.879+0.095
−0.10  MJ 		0.0370+0.0019
−0.0022		2.9444300(11)<0.06588.39+0.79
−0.45 ° 		0.962+0.047
−0.056  RJ

References

  1. ↑ Roman, Nancy G. (1987). "Identification of a constellation from a position". Publications of the Astronomical Society of the Pacific . 99 (617): 695. Bibcode:1987PASP...99..695R. doi: 10.1086/132034 . Constellation record for this object at VizieR.
  2. 1 2 3 4 5 6 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.
  3. 1 2 "WASP-23". SIMBAD . Centre de données astronomiques de Strasbourg . Retrieved 30 October 2025.
  4. 1 2 3 4 Triaud, A. H. M. J.; Queloz, D.; Hellier, C.; Gillon, M.; Smalley, B.; Hebb, L.; Cameron, A. Collier; Anderson, D.; Boisse, I.; Hébrard, G.; Jehin, E.; Lister, T.; Lovis, C.; Maxted, P. F. L.; Pepe, F. (2011-07-01). "WASP-23b: a transiting hot Jupiter around a K dwarf and its Rossiter-McLaughlin effect". Astronomy & Astrophysics. 531: A24. arXiv: 1103.2603 . Bibcode:2011A&A...531A..24T. doi:10.1051/0004-6361/201016367. ISSN   0004-6361.
  5. 1 2 Bonomo, A. S.; Desidera, S.; et al. (June 2017). "The GAPS Programme with HARPS-N at TNG. XIV. Investigating giant planet migration history via improved eccentricity and mass determination for 231 transiting planets". Astronomy & Astrophysics . 602: A107. arXiv: 1704.00373 . Bibcode:2017A&A...602A.107B. doi: 10.1051/0004-6361/201629882 .
  6. ↑ "WASP-23 | NASA Exoplanet Archive". exoplanetarchive.ipac.caltech.edu. Retrieved 2025-10-29.
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