WASP-80

WASP-80 / Petra
Observation data
Epoch J2000      Equinox J2000
Constellation Aquila
Right ascension 20h 12m 40.1692s[1]
Declination −02° 08′ 39.1912″[1]
Apparent magnitude (V) 11.939
Characteristics
Evolutionary stage Main sequence
Spectral type K7[citation needed]
Astrometry
Radial velocity (Rv)9.82±0.77[2] km/s
Proper motion (μ) RA: -132.913[2] mas/yr
Dec.: -50.683[2] mas/yr
Parallax (π)20.1141 ± 0.0207 mas[2]
Distance162.2 ± 0.2 ly
(49.72 ± 0.05 pc)
Details
Mass0.614+0.014
−0.012[3] M☉
Radius0.586+0.017
−0.018[4] R☉
Surface gravity (log g)4.60±0.02[5] cgs
Temperature4066±22[5] K
Metallicity [Fe/H]0.13±0.11[6] dex
Rotation23.5±3[7]
Rotational velocity (v sin i)5.04±0.19[5] km/s
Age1.352±0.222[7] Gyr
Other designations
Petra, Gaia DR2 4223507222112425344, TYC 5165-481-1, GSC 05165-00481, 2MASS J20124017-0208391[1]
Database references
SIMBADdata

WASP-80 is a K-type main-sequence star about 162 light-years away from Earth. The star's age is much younger than the Sun's at 1.352±0.222 billion years.[7] WASP-80 could be similar to the Sun in concentration of heavy elements, although this measurement is highly uncertain.[6]

The star was named Petra in 2019 by Jordanian amateur astronomers as part of the NameExoWorlds contest.[8]

Three multiplicity surveys in 2015-2018 did not detect any stellar companions to WASP-80, but a survey in 2020 detected a 0.07M☉ companion candidate at an angular separation 2.132±0.010 arcseconds, with a false alarm probability of 3%.[9]

  1. ^ a b c Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  2. ^ a b c d Brown, A. G. A.; et al. (Gaia collaboration) (2021). "Gaia Early Data Release 3: Summary of the contents and survey properties". Astronomy & Astrophysics. 649: A1. arXiv:2012.01533. Bibcode:2021A&A...649A...1G. doi:10.1051/0004-6361/202039657. S2CID 227254300. (Erratum: doi:10.1051/0004-6361/202039657e). Gaia EDR3 record for this source at VizieR.
  3. ^ Wang, Xian-Yu; Wang, Yong-Hao; Wang, Songhu; Wu, Zhen-Yu; Rice, Malena; Zhou, Xu; Hinse, Tobias C.; Liu, Hui-Gen; Ma, Bo; Peng, Xiyan; Zhang, Hui; Yu, Cong; Zhou, Ji-Lin; Laughlin, Gregory (2021), "Transiting Exoplanet Monitoring Project (TEMP). VI. The Homogeneous Refinement of System Parameters for 39 Transiting Hot Jupiters with 127 New Light Curves", The Astrophysical Journal Supplement Series, 255 (1): 15, arXiv:2105.14851, Bibcode:2021ApJS..255...15W, doi:10.3847/1538-4365/ac0835, S2CID 235253975
  4. ^ Cite error: The named reference Triaud2015 was invoked but never defined (see the help page).
  5. ^ a b c Gill, S.; Maxted, P. F. L.; Smalley, B. (2018), "The atmospheric parameters of FGK stars using wavelet analysis of CORALIE spectra", Astronomy & Astrophysics, 612: A111, arXiv:1801.06106, Bibcode:2018A&A...612A.111G, doi:10.1051/0004-6361/201731954, S2CID 119331772
  6. ^ a b Wallack, Nicole L.; Knutson, Heather A.; Morley, Caroline V.; Moses, Julianne I.; Thomas, Nancy H.; Thorngren, Daniel P.; Deming, Drake; Désert, Jean-Michel; Fortney, Jonathan J.; Kammer, Joshua A. (2019), "Investigating Trends in Atmospheric Compositions of Cool Gas Giant Planets UsingSpitzer Secondary Eclipses", The Astronomical Journal, 158 (6): 217, arXiv:1908.00014, Bibcode:2019AJ....158..217W, doi:10.3847/1538-3881/ab2a05, S2CID 199064423
  7. ^ 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
  8. ^ "Star, its exoplanet named after Petra, Wadi Rum". Roya News. 2019-12-17. Retrieved 2021-04-04.
  9. ^ Bohn, A. J.; Southworth, J.; Ginski, C.; Kenworthy, M. A.; Maxted, P. F. L.; Evans, D. F. (2020), "A multiplicity study of transiting exoplanet host stars", Astronomy & Astrophysics, 635: A73, arXiv:2001.08224, Bibcode:2020A&A...635A..73B, doi:10.1051/0004-6361/201937127, S2CID 210861118