Misplaced Pages

WASP-63 or Kosjenka, also known as CD-38 2551, is a single star with an exoplanetary companion in the southern constellation of Columba. It is too faint to be visible with the naked eye, having an apparent visual magnitude of 11.1. The distance to this system is approximately 942 light-years (289 parsecs) based on parallax measurements, but it is drifting closer with a radial velocity of −24 km/s.

Nomenclature

The designation WASP-63 indicates that this was the 63rd star found to have a planet by the Wide Angle Search for Planets.

In August 2022, this planetary system was included among 20 systems to be named by the third NameExoWorlds project. The approved names, proposed by a team from Croatia, were announced in June 2023. WASP-63 is named Kosjenka and its planet is named Regoč, after characters from Croatian Tales of Long Ago by Ivana Brlić-Mažuranić.

Stellar properties

This is a G-type star with a stellar classification of G8; the luminosity class is currently unknown. The star is much older than the Sun at approximately 8.3
_−1.2 billion years. WASP-63 is slightly enriched in heavy elements, having 120% of the solar abundance of iron. The stellar radius is enlarged for a G8 star, and models suggest it has evolved into a subgiant star. It has 1.1 times the mass of the Sun and is spinning with a projected rotational velocity of 3 km/s.

Planetary system

In 2012 a transiting gas giant planet WASP-63b was detected on a tight, circular orbit. Its equilibrium temperature is 1536±37 K, and measured dayside temperature is 1547±308 K. The planet is similar to Saturn in mass but is highly inflated due to proximity to the parent star. The planetary atmosphere contains water and likely has a high cloud deck of indeterminate composition.

References

1. ^ 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.
2. ^ Santos, N. C.; et al. (August 2013), "SWEET-Cat: A catalogue of parameters for Stars With ExoplanETs. I. New atmospheric parameters and masses for 48 stars with planets", Astronomy & Astrophysics, 556: 11, arXiv:1307.0354, Bibcode:2013A&A...556A.150S, doi:10.1051/0004-6361/201321286, S2CID 55237847, A150.
3. ^ Hellier, Coel; et al. (2012), "Seven transiting hot-Jupiters from WASP-South, Euler and TRAPPIST: WASP-47b, WASP-55b, WASP-61b, WASP-62b, WASP-63b, WASP-66b & WASP-67b", Monthly Notices of the Royal Astronomical Society, 426 (1): 739–750, arXiv:1204.5095, Bibcode:2012MNRAS.426..739H, doi:10.1111/j.1365-2966.2012.21780.x, S2CID 54713354
4. ^ Brown, D. J. A. (2014), "Discrepancies between isochrone fitting and gyrochronology for exoplanet host stars?", Monthly Notices of the Royal Astronomical Society, 442 (2): 1844–1862, arXiv:1406.4402, Bibcode:2014MNRAS.442.1844B, doi:10.1093/mnras/stu950, S2CID 56052792.
5. ^ 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
6. ^ Stassun, Keivan G.; et al. (2016), "Accurate Empirical Radii and Masses of Planets and Their Host Stars with Gaia Parallaxes", The Astronomical Journal, 153 (3): 136, arXiv:1609.04389, Bibcode:2017AJ....153..136S, doi:10.3847/1538-3881/aa5df3, S2CID 119219062
7. "CD-38 2551". SIMBAD. Centre de données astronomiques de Strasbourg.
8. "List of ExoWorlds 2022". nameexoworlds.iau.org. IAU. 8 August 2022. Retrieved 27 August 2022.
9. "2022 Approved Names". nameexoworlds.iau.org. IAU. Retrieved 7 June 2023.
10. Garhart, Emily; et al. (2020), "Statistical Characterization of Hot Jupiter Atmospheres Using Spitzer's Secondary Eclipses", The Astronomical Journal, 159 (4): 137, arXiv:1901.07040, Bibcode:2020AJ....159..137G, doi:10.3847/1538-3881/ab6cff, S2CID 119209434
11. Kilpatrick, Brian M.; et al. (2017), "Community Targets of JWST's Early Release Science Program: Evaluation of WASP-63b", The Astronomical Journal, 156 (3): 103, arXiv:1704.07421, Bibcode:2018AJ....156..103K, doi:10.3847/1538-3881/aacea7, S2CID 52831173

v t e Constellation of Columba
List of stars in Columba Columba in Chinese astronomy
Stars	Bayer α (Phact) β (Wazn) γ δ ε η θ (Elkurud) κ λ (Tsze) μ ν ν ξ ο π π σ Variable WZ AF AP HR 1721 1758 1835 1877 1958 2069 2082 2131 2149 2263 2288 2399 2411 2445 2446 HD 43848 Other NGTS-1 NGTS-3 WASP-63
Exoplanets NGTS-1b NGTS-3Ab NGTS-4b WASP-63b
Star clusters NGC 1851
Galaxies	NGC 1792 1808 1989 1992 2090 Other ESO 306-17 PKS 0521-365
Category

• G-type subgiants
• Planetary systems with one confirmed planet
• Planetary transit variables
• Columba (constellation)
• 2MASS objects
• Durchmusterung objects
• Wide Angle Search for Planets
• TESS Objects of Interest
• Stars with proper names