Astronomy:WASP-60

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Short description: Star in the constellation Pegasus
WASP-60 / Morava
Observation data
Equinox J2000.0]] (ICRS)
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

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]

The star was named Morava in 2019 by Serbian amateur astronomers as part of the NameExoWorlds contest, after the Morava River in Serbia.[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, after the Vlasina River, a tributary of the Morava.[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. 1.0 1.1 1.2 1.3 1.4 1.5 Brown, A. G. A. (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics 616: A1. doi:10.1051/0004-6361/201833051. Bibcode2018A&A...616A...1G.  Gaia DR2 record for this source at VizieR.
  2. 2.0 2.1 2.2 2.3 2.4 2.5 Mancini, L. et al. (2018), "The GAPS programme with HARPS-N at TNG", Astronomy & Astrophysics 613: A41, doi:10.1051/0004-6361/201732234 
  3. "WASP-60". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=WASP-60. 
  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, doi:10.1093/mnras/stu950, Bibcode2014MNRAS.442.1844B 
  5. Star Facts Stars: A guide to the night sky Home Brightest Stars Star Names Star Names
  6. Wöllert, Maria; Brandner, Wolfgang; Bergfors, Carolina; Henning, Thomas (2015), "A Lucky Imaging search for stellar companions to transiting planet host stars", Astronomy & Astrophysics 575: A23, doi:10.1051/0004-6361/201424091, Bibcode2015A&A...575A..23W 
  7. Hébrard, G. et al. (2012), "WASP-52b, WASP-58b, WASP-59b, and WASP-60b: Four new transiting close-in giant planets", Astronomy & Astrophysics 549: A134, doi:10.1051/0004-6361/201220363 
  8. Srbija je dobila zadatak da predloži i izglasa novo ime za zvezdu WASP-60 i njenu planetu WASP-60b

Coordinates: Sky map 23h 46m 39.9747s, +31° 09′ 21.3721″