WASP-23
| Observation data Epoch J2000.0 Equinox ICRS | |
|---|---|
| Constellation | Puppis |
| Right ascension | 06h 44m 30.61336s |
| Declination | −42° 45′ 42.6668″ |
| Apparent magnitude (V) | 12.52 |
| Characteristics | |
| Evolutionary stage | main sequence |
| Spectral type | K1V |
| Astrometry | |
| Radial velocity (Rv) | +5.29±0.52 km/s |
| Proper motion (μ) | RA: −8.917 mas/yr Dec.: −87.711 mas/yr |
| Parallax (π) | 4.8598±0.0086 mas |
| Distance | 671 ± 1 ly (205.8 ± 0.4 pc) |
| Details | |
| Mass | 0.78+0.13 −0.12 M☉ |
| Radius | 0.765+0.033 −0.049 R☉ |
| Surface gravity (log g) | 4.4±0.2 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 | |
| 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.
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.
| 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.
- 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.
- 1 2 "WASP-23". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 30 October 2025.
- 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.
- 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.
- ↑ "WASP-23 | NASA Exoplanet Archive". exoplanetarchive.ipac.caltech.edu. Retrieved 2025-10-29.
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