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WASP-20

WASP-20
Observation data
Epoch J2000      Equinox J2000
Constellation Cetus[1]
Right ascension 00h 20m 38.53504s[2]
Declination −23° 56′ 08.6028″[2]
Apparent magnitude (V) 10.779[3]
Characteristics
Spectral type F9V[4]
Astrometry
Radial velocity (Rv)1.26±0.85[2] km/s
Proper motion (μ) RA: 1.352 mas/yr[2]
Dec.: -14.739 mas/yr[2]
Parallax (π)3.4699±0.7095 mas[2]
Distanceapprox. 900 ly
(approx. 290 pc)
Details[5]
Mass1.200±0.041 M☉
Radius1.392±0.044 R☉
Temperature5940±100 K
Metallicity [Fe/H]−0.008±0.060 dex
Rotational velocity (v sin i)4.75±0.51 km/s
Age7.0+2.0
−1.0 Gyr
Other designations
CD−24 102, TOI-194, TIC 211438925, WASP-20, TYC 6413-439-1, GSC 06413-00439, 2MASS J00203853-2356086[3]
Database references
SIMBADdata
Exoplanet Archivedata

WASP-20, also known as CD-24 102, is a binary star[4] system in the equatorial constellation Cetus, located at a distance of about 940 light-years (290 parsecs) from the Sun. The primary star is an F-type main sequence star and hosts one confirmed exoplanet, WASP-20b.[6]

Stellar properties

WASP-20 is a star of spectral type F9, aged 7+2
−1 billion years. Its mass is 1.200 ± 0.041 solar masses for a radius of 1.392 ± 0.044 solar radii, or a density of 0.630 ± 0.046 grams per cubic centimeter.[7]

Planetary system

WASP-20b is a transiting hot Jupiter discovered in 2014.[7] WASP-20b orbits WASP-20 in less than five Earth days very close to its star (0.06 AU) in a circular (near-zero eccentricity) orbit. The orbit is inclined by 85.56 ± 0.22° relative to the plane of the sky and is thus edge-on, as necessary for a transit to be observed.[5]

The WASP-20 planetary system[5]
Companion
(in order from star) 		Mass Semimajor axis
(AU) 		Orbital period
(days) 		Eccentricity Inclination Radius
b 0.311+0.019
−0.018 MJ 		0.05999+0.00069
−0.00068 		4.8996284(33) <0.039 85.56±0.22° 1.462±0.059 RJ

See also

References

  1. ^ Roman, Nancy G. (1987). "Identification of a constellation from a position". Publications of the Astronomical Society of the Pacific. 99 (617): 695. Bibcode:1987PASP...99..695R. doi:10.1086/132034. Constellation record for this object at VizieR.
  2. ^ a b c d e Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv:2208.00211. Bibcode:2023A&A...674A...1G. doi:10.1051/0004-6361/202243940. S2CID 244398875. Gaia DR3 record for this source at VizieR.
  3. ^ a b "CD-24 102". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 16 April 2024.
  4. ^ a b Evans, Daniel F.; Southworth, John; Smalley, Barry (December 2016). "WASP-20 Is a Close Visual Binary with a Transiting Hot Jupiter". The Astrophysical Journal Letters. 833 (2): L19. arXiv:1611.08735. Bibcode:2016ApJ...833L..19E. doi:10.3847/2041-8213/833/2/L19.
  5. ^ a b c Bonomo, A. S.; Desidera, S.; et al. (June 2017). "The GAPS Programme with HARPS-N at TNG. XIV. Investigating giant planet migration history via improved eccentricity and mass determination for 231 transiting planets". Astronomy & Astrophysics. 602: A107. arXiv:1704.00373. Bibcode:2017A&A...602A.107B. doi:10.1051/0004-6361/201629882.
  6. ^ "WASP-20 | NASA Exoplanet Archive".
  7. ^ a b Anderson, D. R.; Collier Cameron, A.; et al. (March 2015). "WASP-20b and WASP-28b: a hot Saturn and a hot Jupiter in near-aligned orbits around solar-type stars". Astronomy & Astrophysics. 575: A61. arXiv:1402.1482. Bibcode:2015A&A...575A..61A. doi:10.1051/0004-6361/201423591.
Index: pl ar de en es fr it arz nl ja pt ceb sv uk vi war zh ru af ast az bg zh-min-nan bn be ca cs cy da et el eo eu fa gl ko hi hr id he ka la lv lt hu mk ms min no nn ce uz kk ro simple sk sl sr sh fi ta tt th tg azb tr ur zh-yue hy my ace als am an hyw ban bjn map-bms ba be-tarask bcl bpy bar bs br cv nv eml hif fo fy ga gd gu hak ha hsb io ig ilo ia ie os is jv kn ht ku ckb ky mrj lb lij li lmo mai mg ml zh-classical mr xmf mzn cdo mn nap new ne frr oc mhr or as pa pnb ps pms nds crh qu sa sah sco sq scn si sd szl su sw tl shn te bug vec vo wa wuu yi yo diq bat-smg zu lad kbd ang smn ab roa-rup frp arc gn av ay bh bi bo bxr cbk-zam co za dag ary se pdc dv dsb myv ext fur gv gag inh ki glk gan guw xal haw rw kbp pam csb kw km kv koi kg gom ks gcr lo lbe ltg lez nia ln jbo lg mt mi tw mwl mdf mnw nqo fj nah na nds-nl nrm nov om pi pag pap pfl pcd krc kaa ksh rm rue sm sat sc trv stq nso sn cu so srn kab roa-tara tet tpi to chr tum tk tyv udm ug vep fiu-vro vls wo xh zea ty ak bm ch ny ee ff got iu ik kl mad cr pih ami pwn pnt dz rmy rn sg st tn ss ti din chy ts kcg ve
Prefix: a b c d e f g h i j k l m n o p q r s t u v w x y z 0 1 2 3 4 5 6 7 8 9

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