WASP-50

{{Starbox begin

| name = WASP-50 / Chaophraya

}}

{{Starbox observe

| epoch = J2000

| ra = {{RA|02|54|45.1342}}

| dec = {{DEC|−10|53|53.025}}

| constell = Eridanus

| appmag_v = 11.44

}}

{{Starbox character

| class = G9V

}}

{{Starbox astrometry

| radial_v = {{val|25.76|0.69}}

| prop_mo_ra = {{val|3.383|(20)}}

| prop_mo_dec = {{val|8.913|(17)}}

| pm_footnote =

| parallax = 5.4865

| p_error = 0.0174

| parallax_footnote =

}}

{{Starbox detail

| mass = {{val|0.892|0.08|0.074}}

| radius = {{val|0.843|0.031}}

| gravity = {{val|4.5|0.1}}

| luminosity =

| temperature = {{val|5400|100}}

| metal = {{val|−0.12|0.08}}

| rotation = {{val|16.30|0.50|ul=d}}

| rotational_velocity = {{val|2.6|0.5}}

| age_gyr = {{val|8.57|2.86}}

}}

{{Starbox catalog

| names = {{odlist | name=Chaophraya | 2MASS=J02544513-1053530 | GSC=05290-00462 | TIC=382391899 | TOI=391 | TYC=5290-462-1 | WASP=50}}

}}

{{Starbox reference

| Simbad = WASP-50

| NSTED = WASP-50

}}

WASP-50 is a G-type main-sequence star about 594 light-years away. The star is older than the Sun and slightly depleted in heavy elements compared to the Sun, and has a close to average starspot activity. Despite its advanced age, the star is rotating rapidly, being spun up by the tides raised by a giant planet on a close orbit.

The star was named Chaophraya in December 2019 by Thai amateur astronomers through NameExoWorlds.{{cite web |url=https://www.nationthailand.com/edandtech/30379640 |title=Two celestial objects named Chao Phraya and Maeping |website=nationthailand.com |date=19 December 2019 |access-date=2020-07-30}}

Planetary system

In 2011 a transiting hot superjovian planet, WASP-50b (named Maeping in 2019) was detected. In 2022 its albedo was found to be no more than 0.44, meaning that the planet reflects less than 44% of the light irradiated by its host star. This allows the planetary equilibrium temperature to be constrained at {{Val|1393|42|ul=K}}.{{Cite journal |last1=Blažek |first1=Martin |last2=Kabáth |first2=Petr |last3=Piette |first3=Anjali A A |last4=Madhusudhan |first4=Nikku |last5=Skarka |first5=Marek |last6=Šubjak |first6=Ján |last7=Anderson |first7=David R |last8=Boffin |first8=Henri M J |last9=Cáceres |first9=Claudio C |last10=Gibson |first10=Neale P |last11=Hoyer |first11=Sergio |last12=Ivanov |first12=Valentin D |last13=Rojo |first13=Patricio M |date=2022-04-09 |title=Constraints on TESS albedos for five hot Jupiters |journal=Monthly Notices of the Royal Astronomical Society |volume=513 |issue=3 |pages=3444–3457 |doi=10.1093/mnras/stac992 |doi-access=free |issn=0035-8711|arxiv=2204.03327 }}

{{OrbitboxPlanet begin

| table_ref =

}}

{{OrbitboxPlanet

| exoplanet = b / Maeping

| mass = {{val|1.437|0.068}}

| radius = {{val|1.138|0.026}}

| semimajor = {{val|0.0293|0.0013}}

| period = {{val|1.955100|0.000005}}

| eccentricity = {{val|0.009|0.011|0.006}}

| inclination = {{val|84.88|0.27}}

}}

References

{{Reflist|refs=

[http://simbad.u-strasbg.fr/simbad/sim-id?Ident=WASP-50 WASP-50 -- Star]

{{citation|arxiv=1108.2641|title=WASP-50 b: a hot Jupiter transiting a moderately active solar-type star|year=2011|doi=10.1051/0004-6361/201117198|last1=Gillon|first1=M.|last2=Doyle|first2=A. P.|last3=Lendl|first3=M.|last4=Maxted|first4=P. F. L.|last5=Triaud|first5=A. H. M. J.|last6=Anderson|first6=D. R.|last7=Barros|first7=S. C. C.|last8=Bento|first8=J.|last9=Collier-Cameron|first9=A.|last10=Enoch|first10=B.|last11=Faedi|first11=F.|last12=Hellier|first12=C.|last13=Jehin|first13=E.|last14=Magain|first14=P.|last15=Montalban|first15=J.|last16=Pepe|first16=F.|last17=Pollacco|first17=D.|last18=Queloz|first18=D.|last19=Smalley|first19=B.|last20=Segransan|first20=D.|last21=Smith|first21=A. M. S.|last22=Southworth|first22=J.|last23=Udry|first23=S.|last24=West|first24=R. G.|last25=Wheatley|first25=P. J.|journal=Astronomy & Astrophysics |volume=533 |pages=A88 |bibcode=2011A&A...533A..88G |s2cid=46639973}}

{{citation|arxiv=1212.0686|title=An extremely high photometric precision in ground-based observations of two transits in the WASP-50 planetary system|year=2012|doi=10.1093/mnras/stt227|last1=Tregloan-Reed|first1=Jeremy|last2=Southworth|first2=John|journal=Monthly Notices of the Royal Astronomical Society|volume=431|pages=966–971|doi-access=free |s2cid=118869498 |bibcode=2013MNRAS.431..966T}}

{{citation|arxiv=1503.09111|title=A comparison of gyrochronological and isochronal age estimates for transiting exoplanet host stars|year=2015|doi=10.1051/0004-6361/201525774|last1=Maxted|first1=P. F. L.|last2=Serenelli|first2=A. M.|last3=Southworth|first3=J.|journal=Astronomy & Astrophysics|volume=577|pages=A90|bibcode=2015A&A...577A..90M |s2cid=53324330}}

{{citation|arxiv=1905.11258|year=2019|doi=10.3847/1538-3881/ab24dd|last1=Chakrabarty|first1=Aritra|last2=Sengupta|first2=Sujan|title=Precise Photometric Transit Follow-up Observations of Five Close-in Exoplanets: Update on Their Physical Properties|journal=The Astronomical Journal|volume=158|issue=1 |page=39|bibcode=2019AJ....158...39C |s2cid=166227769 |doi-access=free }}

{{cite journal |last1=Knudstrup |first1=E. |last2=Albrecht |first2=S. H. |display-authors=etal |date=October 2024 |title=Obliquities of exoplanet host stars: Nineteen new and updated measurements, and trends in the sample of 205 measurements |journal=Astronomy & Astrophysics |volume=690 |issue= |pages=A379 |doi=10.1051/0004-6361/202450627 |arxiv=2408.09793 |bibcode=2024A&A...690A.379K}}

}}

Category:Eridanus (constellation)

Category:G-type main-sequence stars

Category:Planetary systems with one confirmed planet

Category:Planetary transit variables