| 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]
| 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) | <0.065 | 88.39+0.79 −0.45° |
0.962+0.047 −0.056 RJ |
References
- ^ 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.
- ^ a b c d e 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.
- ^ a b "WASP-23". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 30 October 2025.
- ^ a b c d 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.
- ^ a b 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.
- ^ "WASP-23 | NASA Exoplanet Archive". exoplanetarchive.ipac.caltech.edu. Retrieved 2025-10-29.
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