WASP-64
WASP-64 is a single star about 1200 light-years away. It is a G7 class main-sequence star, orbited by a planet WASP-64b. The age of WASP-64 is younger than the Sun at 3.6±1.6 billion years,[5] and it has a metal abundance similar to the Sun.[2] The star is rotating rapidly, being spun up by the giant planet in a close orbit.[5]
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Canis Major |
| Right ascension | 06h 44m 27.6052s[1] |
| Declination | −32° 51′ 30.1787″[1] |
| Apparent magnitude (V) | 12.29[2] |
| Characteristics | |
| Evolutionary stage | main-sequence star |
| Spectral type | G7[2] |
| Apparent magnitude (J) | 11.368 [1] |
| Apparent magnitude (G) | 12.5257 [1] |
| Apparent magnitude (H) | 11.079 [1] |
| Astrometry | |
| Radial velocity (Rv) | 35.48 km/s |
| Proper motion (μ) | RA: -19.389[3] mas/yr Dec.: -1.123[3] mas/yr |
| Parallax (π) | 2.6745 ± 0.0218[3] mas |
| Distance | 1,220 ± 10 ly (374 ± 3 pc) |
| Details[4] | |
| Mass | 0.993+0.034 −0.037 M☉ |
| Radius | 1.036+0.046 −0.065 R☉ |
| Luminosity | 0.90±0.15 L☉ |
| Temperature | 5400±100[2] K |
| Metallicity [Fe/H] | -0.08±0.11 dex |
| Rotation | 15.8±3.7 d[5] |
| Age | 3.554±1.629[5] Gyr |
| Other designations | |
| Database references | |
| SIMBAD | data |
WASP-64 was named Atakoraka in 2019.[6] An imaging survey in 2017 has failed to find any stellar companions to WASP-64.[7]
Planetary system
The transiting hot Jupiter exoplanet orbiting WASP-64 was discovered by WASP in 2012.[4]
The planetary equilibrium temperature is 1672+59
−63 K,[4] while the measured dayside temperature is hotter at 1989+87
−88 K.[8] Due to the close proximity of the planet to the parent star, orbital decay of WASP-64b, along with HATS-2, may be detectable in the near future.[9]
WASP-64b was named "Agouto" in 2019 by amateur astronomers from Togo as part of the NameExoWorlds contest.[6]
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b | — | 0.0272±0.0012 | 1.573253+0.000028 −0.000027 |
0 | 89.6±3.2° | 1.244±0.036 RJ |
References
- "WASP-64". SIMBAD. Centre de données astronomiques de Strasbourg.
- WASP-64 The planetary system WASP-64 hosts at least one planet
- Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
- Gillon, M.; Anderson, D. R.; Collier-Cameron, A.; Doyle, A. P.; Fumel, A.; Hellier, C.; Jehin, E.; Lendl, M.; Maxted, P. F. L.; Montalban, J.; Pepe, F.; Pollacco, D.; Queloz, D.; Segransan, D.; Smith, A. M. S.; Smalley, B.; Southworth, J.; Triaud, A. H. M. J.; Udry, S.; West, R. G. (2012), WASP-64b and WASP-72b: two new transiting highly irradiated giant planets, arXiv:1210.4257, doi:10.1051/0004-6361/201220561, S2CID 53687206
- 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, doi:10.1051/0004-6361/202038058, S2CID 219687851
- "Togo Approved Names". Name Exoworlds. International Astronomical Union. Retrieved 2020-11-12.
- Evans, D. F.; Southworth, J.; Smalley, B.; Jørgensen, U. G.; Dominik, M.; Andersen, M. I.; Bozza, V.; Bramich, D. M.; Burgdorf, M. J.; Ciceri, S.; d'Ago, G.; Figuera Jaimes, R.; Gu, S.-H.; Hinse, T. C.; Henning, Th.; Hundertmark, M.; Kains, N.; Kerins, E.; Korhonen, H.; Kokotanekova, R.; Kuffmeier, M.; Longa-Peña, P.; Mancini, L.; MacKenzie, J.; Popovas, A.; Rabus, M.; Rahvar, S.; Sajadian, S.; Snodgrass, C.; et al. (2018), "High-resolution Imaging of Transiting Extrasolar Planetary systems (HITEP). II. Lucky Imaging results from 2015 and 2016", Astronomy & Astrophysics, 610: A20, arXiv:1709.07476, doi:10.1051/0004-6361/201731855, S2CID 53400492
- Wong, Ian; Shporer, Avi; Daylan, Tansu; Benneke, Björn; Fetherolf, Tara; Kane, Stephen R.; Ricker, George R.; Vanderspek, Roland; Latham, David W.; Winn, Joshua N.; Jenkins, Jon M.; Boyd, Patricia T.; Glidden, Ana; Goeke, Robert F.; Sha, Lizhou; Ting, Eric B.; Yahalomi, Daniel (2020), "Systematic phase curve study of known transiting systems from year one of the TESS mission", The Astronomical Journal, 160 (4): 155, arXiv:2003.06407, doi:10.3847/1538-3881/ababad, S2CID 212717799
- Southworth, John; Dominik, M.; Jørgensen, U. G.; Andersen, M. I.; Bozza, V.; Burgdorf, M. J.; d'Ago, G.; Dib, S.; Figuera Jaimes, R.; Fujii, Y. I.; Gill, S.; Haikala, L. K.; Hinse, T. C.; Hundertmark, M.; Khalouei, E.; Korhonen, H.; Longa-Peña, P.; Mancini, L.; Peixinho, N.; Rabus, M.; Rahvar, S.; Sajadian, S.; Skottfelt, J.; Snodgrass, C.; Spyratos, P.; Tregloan-Reed, J.; Unda-Sanzana, E.; von Essen, C. (2019), "Transit timing variations in the WASP-4 planetary system", Monthly Notices of the Royal Astronomical Society, 490 (3): 4230–4236, arXiv:1907.08269, doi:10.1093/mnras/stz2602, S2CID 197935338
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