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WASP-20

{{Short description|Star in the constellation Cetus}}

{{Starbox begin}}

{{Starbox observe

| epoch = J2000

| constell = Cetus

| ra = {{RA|00|20|38.53504}}

| dec = {{DEC|-23|56|08.6028}}

| appmag_v = 10.779

}}

{{Starbox character

| class = F9V

}}

{{Starbox astrometry

| radial_v = {{val|1.26|0.85}}

| prop_mo_ra = 1.352

| prop_mo_dec = -14.739

| pm_footnote =

| parallax = 3.4699

| p_error = 0.7095

| parallax_footnote =

| absmag_v =

| absmag_bol =

}}

{{Starbox detail

| source =

| mass = {{val|1.200|0.041}}

| radius = {{val|1.392|0.044}}

| luminosity =

| gravity =

| temperature = {{val|5940|100}}

| metal_fe = {{val|−0.008|0.060}}

| rotation =

| rotational_velocity = {{val|4.75|0.51}}

| age_gyr = {{val|7.0|2.0|1.0}}

}}

{{Starbox catalog

| names = {{odlist | 2MASS=J00203853-2356086 | CD=-24 102 | GSC=06413-00439 | TIC=211438925 | TOI=194 | TYC=6413-439-1 | WASP=20}}

}}

{{Starbox reference

| Simbad = CD-24+102

| NSTED = WASP-20

}}

{{Starbox end}}

WASP-20, also known as CD-24 102, is a binary star system in the equatorial constellation Cetus, located at a distance of about {{convert|940|ly|pc|lk=on|abbr=off}} from the Sun. The primary star is an F-type main sequence star and hosts one confirmed exoplanet, WASP-20b.{{Cite web |title=WASP-20 {{!}} NASA Exoplanet Archive |url=https://exoplanetarchive.ipac.caltech.edu/overview/wasp%2020%20b#overview}}

Stellar properties

WASP-20 is a star of spectral type F9, aged {{val|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.

Planetary system

WASP-20b is a transiting hot Jupiter discovered in 2014. 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.

{{Orbitbox planet begin

| name = WASP-20

| table_ref =

}}

{{Orbitbox planet

| exoplanet = b

| mass = {{val|0.311|0.019|0.018}}

| radius = {{val|1.462|0.059}}

| semimajor = {{val|0.05999|0.00069|0.00068}}

| period = {{val|4.8996284|(33)}}

| eccentricity = <0.039

| inclination = {{val|85.56|0.22}}

}}

{{Orbitbox end}}

See also

References

{{reflist|refs=

{{cite simbad |title=CD-24 102 |access-date=16 April 2024}}

{{Cite Gaia DR3|2359978293137038720}}

{{cite journal |last1=Anderson |first1=D. R. |last2=Collier Cameron |first2=A. |display-authors=etal |date=March 2015 |title=WASP-20b and WASP-28b: a hot Saturn and a hot Jupiter in near-aligned orbits around solar-type stars |journal=Astronomy & Astrophysics |volume=575 |issue= |pages=A61 |doi=10.1051/0004-6361/201423591 |arxiv=1402.1482 |bibcode=2015A&A...575A..61A}}

{{cite journal |last1=Evans |first1=Daniel F. |last2=Southworth |first2=John |last3=Smalley |first3=Barry |date=December 2016 |title=WASP-20 Is a Close Visual Binary with a Transiting Hot Jupiter |journal=The Astrophysical Journal Letters |volume=833 |issue=2 |pages=L19 |doi=10.3847/2041-8213/833/2/L19 |doi-access=free |arxiv=1611.08735 |bibcode=2016ApJ...833L..19E}}

{{cite journal |last1=Bonomo |first1=A. S. |last2=Desidera |first2=S. |display-authors=etal |date=June 2017 |title=The GAPS Programme with HARPS-N at TNG. XIV. Investigating giant planet migration history via improved eccentricity and mass determination for 231 transiting planets |journal=Astronomy & Astrophysics |volume=602 |issue= |pages=A107 |doi=10.1051/0004-6361/201629882 |arxiv=1704.00373 |bibcode=2017A&A...602A.107B}}

{{Cite constellation|WASP-20}}

}}

{{Cetus}}

Category:Cetus

Category:Binary stars

Category:F-type main-sequence stars

Category:Planetary systems with one confirmed planet

J00203853-2356086

CD-24 00102

211438925

194

20