WASP-61

WASP-61 is a single F-type main-sequence star about 1560 light-years away. The star age is much likely younger than the Sun's at approximately 3.8+1.8
−0.9 billion years. WASP-61 is depleted in heavy elements, having just 40% of the solar abundance of iron.[3]

WASP-61
Observation data
Epoch J2000      Equinox J2000
Constellation Lepus
Right ascension 05h 01m 11.9187s[1]
Declination −26° 03′ 14.9668″[1]
Apparent magnitude (V) 12.49
Characteristics
Evolutionary stage Main sequence
Spectral type F7V
Astrometry
Radial velocity (Rv)18.66[1] km/s
Proper motion (μ) RA: 0.495[1] mas/yr
Dec.: 3.169[1] mas/yr
Parallax (π)2.0176 ± 0.0228[1] mas
Distance1,620 ± 20 ly
(496 ± 6 pc)
Details[2]
Mass1.22±0.07 M☉
Radius1.36±0.03 R☉
Surface gravity (log g)4.21±0.21[3] cgs
Temperature6265±168[3] K
Metallicity [Fe/H]-0.38±0.11[3] dex
Rotational velocity (v sin i)10.3±0.5 km/s
Age3.8+1.8
−0.9 Gyr
Other designations
Gaia DR2 2959177048983750016, TYC 6469-1972-1, 2MASS J05011191-2603149 [4]
Database references
SIMBADdata

Planetary system

In 2012 a transiting superjovian planet b was detected on a tight, circular orbit.[5] Its equilibrium temperature is 1565±35 K.[5]

The planetary orbit is well aligned with the equatorial plane of the star, misalignment equal to 4.0+17.1
−18.4°[6]

The WASP-61 planetary system[2]
Companion
(in order from star)		 Mass Semimajor axis
(AU)		 Orbital period
(days)		 Eccentricity Inclination Radius
b 2.05+0.18
−0.17 MJ		 0.05146+0.00097
−0.00099		 3.8559000±0.000003 <0.074 89.35+0.45
−0.66[5]°		 1.41±0.22[7] 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. XIV. Investigating giant planet migration history via improved eccentricity and mass determination for 231 transiting planets, 2017, arXiv:1704.00373
  3. SWEET-Cat update and FASMA A new minimization procedure for stellar parameters using high-quality spectra, 2017, arXiv:1703.06671
  4. "WASP-61". SIMBAD. Centre de données astronomiques de Strasbourg.
  5. Hellier, Coel; Anderson, D. R.; Collier Cameron, A.; Doyle, A. P.; Fumel, A.; Gillon, M.; Jehin, E.; Lendl, M.; Maxted, P. F. L.; Pepe, F.; Pollacco, D.; Queloz, D.; Ségransan, D.; Smalley, B.; Smith, A. M. S.; Southworth, J.; Triaud, A. H. M. J.; Udry, S.; West, R. G. (2012), "Seven transiting hot-Jupiters from WASP-South, Euler and TRAPPIST: WASP-47b, WASP-55b, WASP-61b, WASP-62b, WASP-63b, WASP-66b & WASP-67b", Monthly Notices of the Royal Astronomical Society, 426 (1): 739–750, arXiv:1204.5095, Bibcode:2012MNRAS.426..739H, doi:10.1111/j.1365-2966.2012.21780.x, S2CID 54713354
  6. Rossiter–McLaughlin models and their effect on estimates of stellar rotation, illustrated using six WASP systems, 2016, arXiv:1610.00600
  7. Accurate Empirical Radii and Masses of Planets and Their Host Stars with Gaia Parallaxes, 2016, arXiv:1609.04389


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