| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Dorado |
| Right ascension | 05 48 33.59333 |
| Declination | −63° 59′ 18.3884″ |
| Apparent magnitude (V) | 10.21 |
| Characteristics | |
| Evolutionary stage | main-sequence star |
| Spectral type | F |
| Apparent magnitude (B) | 10.73 |
| Apparent magnitude (G) | 10.077±0.003 |
| Apparent magnitude (R) | 9.93 |
| Astrometry | |
| Radial velocity (Rv) | 15.24±0.25 km/s |
| Proper motion (μ) | RA: -15.439 mas/yr Dec.: 26.151 mas/yr |
| Parallax (π) | 5.6910 ± 0.0113 mas |
| Distance | 573 ± 1 ly (175.7 ± 0.3 pc) |
| Details | |
| Mass | 1.250±0.050 M☉ |
| Radius | 1.280±0.050 R☉ |
| Surface gravity (log g) | 4.45±0.1 cgs |
| Temperature | 6230±80 K |
| Metallicity | 0.040±0.060 dex |
| Rotational velocity (v sin i) | 8.70±0.40 km/s |
| Age | 2.60+0.50 −0.70 Gyr |
| Other designations | |
| Naledi, CPD−64 484, TOI-102, TIC 149603524, WASP-62, TYC 8900-874-1, GSC 08900-00874, 2MASS J05483359-6359183 | |
| Database references | |
| SIMBAD | data |
WASP-62, formally named Naledi, is a single star about 573 light-years (176 parsecs) away. It is an F class main-sequence star, orbited by a planet, WASP-62b. The age of WASP-62 is much younger than the Sun at 0.8±0.6 billion years, and it has a metal abundance similar to the Sun.
Nomenclature
The designation WASP-62 indicates that this was the 62nd star found to have a planet by the Wide Angle Search for Planets.
In December 2019, WASP-62 was named Naledi and its planet was named Krotoa by amateur astronomers from South Africa as part of the second NameExoWorlds campaign.
Planetary system
A transiting hot Jupiter exoplanet orbiting WASP-62 was discovered by WASP in 2012. The planet's equilibrium temperature is 1440±30 K, but the measured average temperature is colder at 1329.6±44.8 K. In 2020, a transmission spectrum indicated the atmosphere of WASP-62b is free of clouds. It contains sodium and possibly silicon hydrides.
The planetary orbit is slightly misaligned to the equatorial plane of the star, with the misalignment angle equal to 19.4
−4.9°.
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b / Krotoa | 0.562±0.042 MJ | 0.05672+0.00075 −0.00079 |
4.4119530(30) | <0.075 | 88.30+0.90 −0.60° |
1.390±0.060 RJ |
References
- ^ 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.
- ^ "CPD-64 484". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2 November 2023.
- ^ 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. S2CID 118923163.
- ^ Brown, D. J. A.; Triaud, A. H. M. J.; Doyle, A. P.; Gillon, M.; Lendl, M.; Anderson, D. R.; Collier Cameron, A.; Hébrard, G.; Hellier, C.; Lovis, C.; Maxted, P. F. L.; Pepe, F.; Pollacco, D.; Queloz, D.; Smalley, B. (2016), "Rossiter–McLaughlin models and their effect on estimates of stellar rotation, illustrated using six WASP systems", Monthly Notices of the Royal Astronomical Society, 464 (1): 810–839, arXiv:1610.00600, Bibcode:2017MNRAS.464..810B, doi:10.1093/mnras/stw2316, S2CID 53497449
- "2019 Approved Names". nameexoworlds.iau.org. IAU. Retrieved 2 November 2023.
- "International Astronomical Union Approves Names For New Stars And Exoplanets". Space in Africa. 18 December 2019. Retrieved 2020-11-12.
- Hellier, Coel; Anderson, D. R.; Collier Cameron, A.; Doyle, A. P.; Fumel, A.; Gillon, M.; Jehin, E.; Lendl, M.; Maxted, P. F. L.; Pepe, F.; Pollacco, D.; Queloz, D.; Ségransan, D.; Smalley, B.; Smith, A. M. S.; Southworth, J.; Triaud, A. H. M. J.; Udry, S.; West, R. G. (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
- ^ Kilpatrick, Brian M.; Lewis, Nikole K.; Kataria, Tiffany; Deming, Drake; Ingalls, James G.; Krick, Jessica E.; Tucker, Gregory S. (2016), "Spitzer secondary eclipse depths with multiple intrapixel sensitivity correction methods observations of WASP-13b, WASP-15b, WASP-16b, WASP-62b, and HAT-P-22b", The Astronomical Journal, 153 (1): 22, arXiv:1611.08708, Bibcode:2017AJ....153...22K, doi:10.3847/1538-3881/153/1/22, S2CID 12168984
- Alam, Munazza K.; Lopez-Morales, Mercedes; MacDonald, Ryan J.; Nikolov, Nikolay; Kirk, James; Goyal, Jayesh M.; Sing, David K.; Wakeford, Hannah R.; Rathcke, Alexander D.; Deming, Drake L.; Sanz-Forcada, Jorge; Lewis, Nikole K.; Barstow, Joanna K.; Mikal-Evans, Thomas; Buchhave, Lars A. (2021), "Evidence of a Clear Atmosphere for WASP-62b: The Only Known Transiting Gas Giant in the JWST Continuous Viewing Zone", The Astrophysical Journal, 906 (2): L10, arXiv:2011.06424, Bibcode:2021ApJ...906L..10A, doi:10.3847/2041-8213/abd18e, S2CID 226306572
