| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Coma Berenices1 |
| Right ascension | 12h 13m 27.8908s2 |
| Declination | +23° 03′ 20.428″2 |
| Apparent magnitude (V) | 11.483 |
| Characteristics | |
| Evolutionary stage | main sequence4 |
| Spectral type | G6V4 |
| Astrometry | |
| Radial velocity (Rv) | 5.97±0.802 km/s |
| Proper motion (μ) | RA: −36.695 mas/yr2 Dec.: 2.954 mas/yr2 |
| Parallax (π) | 3.0471±0.0162 mas2 |
| Distance | 1,070 ± 6 ly (328 ± 2 pc) |
| Details4 | |
| Mass | 1.107±0.0245 M☉ |
| Radius | 1.112+0.026 −0.0225 R☉ |
| Surface gravity (log g) | 4.45 ± 0.1 cgs |
| Temperature | 5600 ± 100 K |
| Metallicity [Fe/H] | 0.12±0.065 dex |
| Rotational velocity (v sin i) | 1.5 ± 0.9 km/s |
| Age | 6.2+3.0 −2.15 Gyr |
| Other designations | |
| Melotte 111 AV 561, TOI-1809, TIC 347329162, WASP-56, TYC 1986-1561-1, 2MASS J12132790+23032056 | |
| Database references | |
| SIMBAD | data |
| Exoplanet Archive | data |
WASP-56 is a sun-like star of spectral type G6 about 1,070 light-years away in the constellation of Coma Berenices.7 It has an apparent magnitude of 11.48. Observations at the Calar Alto Observatory using the lucky imaging technique detected a candidate companion star located 3.4 arcseconds away, however it was not known if this is an actual binary companion or an optical double.8 It was confirmed in 2019 using Gaia DR2 data.9
Planetary system
It has a planet that was discovered by transit photometry in 2011 by the SuperWASP program. Fourteen transits were observed over three watching seasons, each lasting 214 minutes and reducing the stars' brightness by 14 millimagnitudes.4 The planet has around 0.6 times the mass of Jupiter and an orbital period of 4.6 days. The planet possibly has a large core of heavy metals.4
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination (°) |
Radius |
|---|---|---|---|---|---|---|
| b | 0.599+0.040 −0.039 MJ |
0.05614+0.00040 −0.00041 |
4.6171010±0.000003 | <0.082 | 88.5+0.1 −0.2 |
1.092+0.035 −0.033 RJ |
References
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.
- 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.
- 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.
- Faedi, F.; et al. (2013). "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.
- Bonomo, A. S.; Desidera, S.; Benatti, S.; Borsa, F.; Crespi, S.; Damasso, M.; Lanza, A. F.; Sozzetti, A.; Lodato, G.; Marzari, F.; Boccato, C.; Claudi, R. U.; Cosentino, R.; Covino, E.; Gratton, R.; Maggio, A.; Micela, G.; Molinari, E.; Pagano, I.; Piotto, G.; Poretti, E.; Smareglia, R.; Affer, L.; Biazzo, K.; Bignamini, A.; Esposito, M.; Giacobbe, P.; Hébrard, G.; Malavolta, L.; et al. (2017). "The GAPS Programme with HARPS-N@TNG XIV. Investigating giant planet migration history via improved eccentricity and mass determination for 231 transiting planets". Astronomy & Astrophysics. A107: 602. arXiv:1704.00373. Bibcode:2017A&A...602A.107B. doi:10.1051/0004-6361/201629882. S2CID 118923163.
- "Cl* Melotte 111 AV 561". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 9 September 2013.
- "Coma Berenices, constellation boundary". The Constellations. International Astronomical Union. Archived from the original on 4 June 2013. Retrieved 27 February 2014.
- Wöllert, Maria; Brandner, Wolfgang (2015). "A Lucky Imaging search for stellar sources near 74 transit hosts". Astronomy and Astrophysics. 579. A129. arXiv:1506.05456. Bibcode:2015A&A...579A.129W. doi:10.1051/0004-6361/201526525. S2CID 118903879.
- Mugrauer, M. (December 2019). "Search for stellar companions of exoplanet host stars by exploring the second ESA-Gaia data release". Monthly Notices of the Royal Astronomical Society. 490 (4): 5088–5102. Bibcode:2019MNRAS.490.5088M. doi:10.1093/mnras/stz2673.