WASP-60

WASP-60 is a F-type main-sequence star about 1420 light-years away. The stars age is much younger than the Sun's at 1.7±0.5 billion years. WASP-60 is enriched in heavy elements, having 180% of the solar abundance of iron. The star does not have noticeable starspot activity, an unexpected observation for a relatively young star.[2] The age of WASP-60 determined by different methods is highly discrepant though, and it may actually be an old star which experienced an episode of spin-up in the past.[4]

WASP-60
Observation data
Epoch J2000      Equinox J2000
Constellation Pegasus
Right ascension 23h 46m 39.9747s[1]
Declination 31° 09′ 21.3721″[1]
Apparent magnitude (V) 12.18
Characteristics
Evolutionary stage Main sequence
Spectral type F9[2]
Astrometry
Radial velocity (Rv)-26.604[1] km/s
Proper motion (μ) RA: 30.262[1] mas/yr
Dec.: −5.852[1] mas/yr
Parallax (π)2.2916 ± 0.0397[1] mas
Distance1,420 ± 20 ly
(436 ± 8 pc)
Details[2]
Mass1.229±0.026 M☉
Radius1.401±0.066 R☉
Surface gravity (log g)4.31±0.11 cgs
Temperature6105±50 K
Metallicity [Fe/H]0.26±0.07 dex
Rotation34.8±2.7 d
Rotational velocity (v sin i)3.8±0.6 km/s
Age1.7±0.5 Gyr
Other designations
Morava, Gaia DR2 2868528637464028160, TYC 2767-1746-1, 2MASS J23463997+3109213[3]
Database references
SIMBADdata

The star was named Morava in 2019 by Serbian amateur astronomers as part of the "nameexoworlds" contest.[5]

A multiplicity survey in 2015 did not detect any stellar companions to WASP-60.[6]

Planetary system

In 2012 a transiting hot Jupiter planet b was detected on a tight, circular orbit.[7] The planet was named Vlasina by Serbian astronomers in December 2019.[8]

Its equilibrium temperature is 1479±35 K.[2]

Measurement of the Rossiter–McLaughlin effect in 2018 revealed WASP-60b is on a retrograde orbit relative to the equatorial plane of the star, orbital obliquity equal to 129±17°.[2]

The WASP-60 planetary system[2]
Companion
(in order from star)		 Mass Semimajor axis
(AU)		 Orbital period
(days)		 Eccentricity Inclination Radius
b (Vlasina) 0.560±0.036 MJ 0.05548±0.00040 4.3050040 0 86.05±0.57° 1.225±0.069 RJ

References
  1. 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.
  2. The GAPS programme with HARPS-N at TNG XVI. Measurement of the Rossiter-McLaughlin effect of transiting planetary systems HAT-P-3, HAT-P-12, HAT-P-22, WASP-39, and WASP-60, 2018, arXiv:1802.03859
  3. "WASP-60". SIMBAD. Centre de données astronomiques de Strasbourg.
  4. Discrepancies between isochrone fitting and gyrochronology for exoplanet host stars?, 2014, arXiv:1406.4402
  5. Star Facts Stars: A guide to the night sky Home Brightest Stars Star Names Star Names
  6. A Lucky Imaging search for stellar companions to transiting planet host stars, 2015, arXiv:1507.01938
  7. WASP-52b, WASP-58b, WASP-59b, and WASP-60b: four new transiting close-in giant planets, 2012, arXiv:1211.0810
  8. Srbija je dobila zadatak da predloži i izglasa novo ime za zvezdu WASP-60 i njenu planetu WASP-60b


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