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]
| 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 mas[1] |
| Distance | 1,420 ± 20 ly (436 ± 8 pc) |
| Details[2] | |
| Mass | 1.229±0.026 M☉ |
| Radius | 1.401±0.066 R☉ |
| Surface gravity (log g) | 4.31±0.11 cgs |
| Temperature | 6105±50 K |
| Metallicity [Fe/H] | 0.26±0.07 dex |
| Rotation | 34.8±2.7 d |
| Rotational velocity (v sin i) | 3.8±0.6 km/s |
| Age | 1.7±0.5 Gyr |
| Other designations | |
| Database references | |
| SIMBAD | data |
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 edit
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]
| 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 edit
- ^ a b c d e f 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.
- ^ a b c d e f Mancini, L.; et al. (2018), "The GAPS programme with HARPS-N at TNG", Astronomy & Astrophysics, 613: A41, arXiv:1802.03859, doi:10.1051/0004-6361/201732234, S2CID 73565379
- ^ "WASP-60". SIMBAD. Centre de données astronomiques de Strasbourg.
- ^ 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, arXiv:1406.4402, Bibcode:2014MNRAS.442.1844B, doi:10.1093/mnras/stu950
- ^ Star Facts Stars: A guide to the night sky Home Brightest Stars Star Names Star Names
- ^ 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, arXiv:1507.01938, Bibcode:2015A&A...575A..23W, doi:10.1051/0004-6361/201424091, S2CID 119250579
- ^ 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, arXiv:1211.0810, doi:10.1051/0004-6361/201220363, S2CID 54502046
- ^ Srbija je dobila zadatak da predloži i izglasa novo ime za zvezdu WASP-60 i njenu planetu WASP-60b