WASP-57
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| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Libra[1] |
| Right ascension | 14h 55m 16.82284s[2] |
| Declination | −02° 03′ 27.5996″[2] |
| Apparent magnitude (V) | 13.04[3] |
| Characteristics | |
| Evolutionary stage | main sequence[3] |
| Spectral type | G6V[3] |
| Astrometry | |
| Radial velocity (Rv) | −23.90±1.73[2] km/s |
| Proper motion (μ) | RA: -27.009 mas/yr[2] Dec.: -4.655 mas/yr[2] |
| Parallax (π) | 2.4676±0.0162 mas[2] |
| Distance | 1,322 ± 9 ly (405 ± 3 pc) |
| Details[4] | |
| Mass | 0.886±0.061 M☉ |
| Radius | 0.927±0.031 R☉ |
| Surface gravity (log g) | 4.452±0.024[5] cgs |
| Temperature | 5600±100 K |
| Metallicity [Fe/H] | -0.25±0.1 dex |
| Rotation | 12.7±4.5[6] days |
| Rotational velocity (v sin i) | 3.7±1.3 km/s |
| Age | 0.957±0.518[6] Gyr |
| Other designations | |
| TOI-5673, TIC 175772482, WASP-57, GSC 04991-00565, 2MASS J14551682-0203275[7] | |
| Database references | |
| SIMBAD | data |
| Exoplanet Archive | data |
WASP-57 is a single G-type main-sequence star about 1,322 light-years away in the constellation Libra. WASP-57 is depleted in heavy elements, having 55% of the solar abundance of iron.[4] WASP-57 is much younger than the Sun at 0.957±0.518 billion years.[6]
A multiplicity survey in 2015 did not detect any stellar companions to WASP-57.[8]
Planetary system
[edit]In 2012 a transiting hot Jupiter planet, WASP-57b, was detected on a tight, circular orbit around WASP-57.[3] The planetary equilibrium temperature is 1338±29 K.[5]
| Companion (in order from star) | Mass | Semimajor axis (AU) | Orbital period (days) | Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b | 0.643+0.056 −0.054 MJ | 0.03772+0.00083 −0.00089 | 2.83891856±0.00000081 | <0.059 | 86.05±0.20° | 1.050±0.052 RJ |
References
[edit]- ^ 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 c d Faedi, F.; et al. (2012), "WASP-54b, WASP-56b, and WASP-57b: Three new sub-Jupiter mass planets from SuperWASP", Astronomy & Astrophysics, 551: A73, arXiv:1210.2329, Bibcode:2013A&A...551A..73F, doi:10.1051/0004-6361/201220520, S2CID 14346225
- ^ a b c 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
- ^ a b Southworth, John; et al. (2015), "Larger and faster: Revised properties and a shorter orbital period for the WASP-57 planetary system from a pro-am collaboration", Monthly Notices of the Royal Astronomical Society, 454 (3): 3094–3107, arXiv:1509.05609, doi:10.1093/mnras/stv2183
- ^ a b c Gallet, F.; Gallet (2020), "TATOO: Tidal-chronology standalone tool to estimate the age of massive close-in planetary systems", Astronomy & Astrophysics, 641: A38, arXiv:2006.07880, Bibcode:2020A&A...641A..38G, doi:10.1051/0004-6361/202038058, S2CID 219687851
- ^ "WASP-57". SIMBAD. Centre de données astronomiques de Strasbourg.
- ^ Wöllert, Maria; Brandner, Wolfgang (2015), "A Lucky Imaging search for stellar sources near 74 transit hosts", Astronomy & Astrophysics, 579: A129, arXiv:1506.05456, Bibcode:2015A&A...579A.129W, doi:10.1051/0004-6361/201526525, S2CID 118903879
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