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WASP-46

WASP-46
Observation data
Epoch J2000      Equinox J2000
Constellation Indus[1]
Right ascension 21h 14m 56.85987s[2]
Declination −55° 52′ 18.4581″[2]
Apparent magnitude (V) 12.9[3]
Characteristics
Evolutionary stage main sequence[2]
Spectral type G6V[3]
Astrometry
Radial velocity (Rv)−3.28±1.62[2] km/s
Proper motion (μ) RA: +12.521 mas/yr[2]
Dec.: −16.150 mas/yr[2]
Parallax (π)2.6878±0.0131 mas[2]
Distance1,213 ± 6 ly
(372 ± 2 pc)
Details[4]
Mass0.828±0.067 M☉
Radius0.858±0.024 R☉
Surface gravity (log g)4.489±0.013[5] cgs
Temperature5600±150 K
Metallicity [Fe/H]−0.37±0.13 dex
Rotation16.0±1.0 d
Rotational velocity (v sin i)1.9±1.2 km/s
Age9.6+3.4
−4.2 Gyr
Other designations
TOI-101, TIC 231663901, WASP-46, GSC 08797-00758, 2MASS J21145687-5552184, DENIS J211456.8-555218[6]
Database references
SIMBADdata
Exoplanet Archivedata

WASP-46 is a G-type main-sequence star about 1,210 light-years (370 parsecs) away. The star is older than the Sun and is strongly depleted in heavy elements compared to the Sun, having just 45% of the solar abundance.[3] Despite its advanced age, the star is rotating rapidly, being spun up by the tides raised by a giant planet in a close orbit.[7]

The star displays excess ultraviolet emission associated with starspot activity,[8] and is suspected to be surrounded by a dust and debris disk.[9]

  1. ^ Cite error: The named reference Roman1987 was invoked but never defined (see the help page).
  2. ^ a b c d e f Cite error: The named reference GaiaDR3 was invoked but never defined (see the help page).
  3. ^ a b c Cite error: The named reference Anderson2011 was invoked but never defined (see the help page).
  4. ^ Cite error: The named reference Bonomo2017 was invoked but never defined (see the help page).
  5. ^ Cite error: The named reference Ciceri2015 was invoked but never defined (see the help page).
  6. ^ Cite error: The named reference simbad was invoked but never defined (see the help page).
  7. ^ Cite error: The named reference Maxted2015 was invoked but never defined (see the help page).
  8. ^ Shkolnik, Evgenya L. (2013), "An Ultraviolet Investigation of Activity on Exoplanet Host Stars", The Astrophysical Journal, 766 (1): 9, arXiv:1301.6192, Bibcode:2013ApJ...766....9S, doi:10.1088/0004-637X/766/1/9, S2CID 118415788
  9. ^ Ribas, Á.; Merín, B.; Ardila, D. R.; Bouy, H. (2012), "Warm Debris Disks Candidates in Transiting Planets Systems", Astronomy & Astrophysics, 541: A38, arXiv:1203.0013, Bibcode:2012A&A...541A..38R, doi:10.1051/0004-6361/201118306, S2CID 29380547

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