WASP-64#Planetary system

{{Starbox begin

| name = WASP-64 / Atakoraka

}}

{{Starbox observe

| epoch = J2000.0

| constell = Canis Major

| ra = {{RA|06|44|27.60507}}

| dec = {{DEC|-32|51|30.1793}}

| appmag_v = 12.29

}}

{{Starbox character

| type = main-sequence star

| class = G7

| appmag_1_passband = J

| appmag_1 = 11.368

| appmag_2_passband = H

| appmag_2 = 11.079

| appmag_3_passband = K

| appmag_3 = 10.956

| variable =

}}

{{Starbox astrometry

| radial_v = {{val|34.40|1.23}}

| prop_mo_ra = -19.265

| prop_mo_dec = -1.072

| pm_footnote =

| parallax = 2.7721

| p_error = 0.0102

| parallax_footnote =

| absmag_v =

}}

{{Starbox detail

| source =

| mass = {{val|1.004|0.028}}

| radius = {{val|1.058|0.025}}

| luminosity = {{val|0.95|0.13}}

| gravity = {{val|4.4|0.15}}

| temperature = {{val|5550|150}}

| metal_fe = {{val|−0.08|0.11}}

| rotation = {{val|15.8|3.7|ul=d}}

| rotational_velocity = {{val|3.4|0.8}}

| age_gyr = {{val|3.554|1.629}}

}}

{{Starbox catalog

| names = {{odlist | name=Atakoraka | 2MASS=J06442760-3251302 | GSC=07091-01514 | TIC=52640302 | TOI=473 | WASP=64}}

}}

{{Starbox reference

| Simbad = WASP-64

| NSTED = WASP-64

}}

WASP-64 is a star about 1,177 light-years away. It is a G7 class main-sequence star, orbited by a planet WASP-64b. It is younger than the Sun at 3.6{{±|1.6}} billion years, and it has a metal abundance similar to the Sun. The star is rotating rapidly, being spun up by the giant planet in a close orbit.

WASP-64 was named Atakoraka in 2019 after the Atacora, the largest mountain range in Togo. While an imaging survey in 2017 failed to find any stellar companions, a 2019 survey using Gaia DR2 data found WASP-64 to be the secondary star in a binary system, with a wide separation of 24.2 arcseconds or 9,058 AU. The primary star is designated TYC 7091-1288-1, and can also be called WASP-64 A, with the planet host being WASP-64 B.

Planetary system

A transiting hot Jupiter exoplanet orbiting WASP-64 was discovered by WASP in 2012. The planetary equilibrium temperature is 1672{{±|59|63}} K, while the measured dayside temperature is hotter at 1989{{±|87|88}} K. Due to the close proximity of the planet to the parent star, orbital decay of WASP-64b, along with HATS-2, may be detectable in the near future.{{citation|arxiv=1907.08269|title=Transit timing variations in the WASP-4 planetary system|year=2019|doi=10.1093/mnras/stz2602|last1=Southworth|first1=John|last2=Dominik|first2=M.|last3=Jørgensen|first3=U. G.|last4=Andersen|first4=M. I.|last5=Bozza|first5=V.|last6=Burgdorf|first6=M. J.|last7=d'Ago|first7=G.|last8=Dib|first8=S.|last9=Figuera Jaimes|first9=R.|last10=Fujii|first10=Y. I.|last11=Gill|first11=S.|last12=Haikala|first12=L. K.|last13=Hinse|first13=T. C.|last14=Hundertmark|first14=M.|last15=Khalouei|first15=E.|last16=Korhonen|first16=H.|last17=Longa-Peña|first17=P.|last18=Mancini|first18=L.|last19=Peixinho|first19=N.|last20=Rabus|first20=M.|last21=Rahvar|first21=S.|last22=Sajadian|first22=S.|last23=Skottfelt|first23=J.|last24=Snodgrass|first24=C.|last25=Spyratos|first25=P.|last26=Tregloan-Reed|first26=J.|last27=Unda-Sanzana|first27=E.|last28=von Essen|first28=C.|journal=Monthly Notices of the Royal Astronomical Society|volume=490|issue=3|pages=4230–4236|doi-access=free |s2cid=197935338}} WASP-64b was named Agouto (after Mount Agou, the highest point of Togo which lies within the Atacora chain) in 2019 by amateur astronomers from Togo as part of the NameExoWorlds contest.{{Cite web

|url=http://www.nameexoworlds.iau.org/togo

|title=Togo Approved Names

|access-date=2020-11-12 |website=Name Exoworlds |publisher=International Astronomical Union|language=en}}

{{OrbitboxPlanet begin

| name = WASP-64

| table_ref =

}}

{{OrbitboxPlanet

| exoplanet = b / Agouto

| mass = {{val|1.221|0.073|0.071}}

| semimajor = {{val|0.02652|0.00024|0.00025}}

| period = {{val|1.5732918|(15)}}

| eccentricity = <0.054

| inclination = {{val|86.57|0.80|0.60}}

| radius = {{val|1.244|0.036}}

}}

References

{{Reflist|refs=

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{{cite journal |last1=Mugrauer |first1=M. |date=December 2019 |title=Search for stellar companions of exoplanet host stars by exploring the second ESA-Gaia data release |journal=Monthly Notices of the Royal Astronomical Society |volume=490 |issue=4 |pages=5088–5102 |doi=10.1093/mnras/stz2673 |doi-access=free |bibcode=2019MNRAS.490.5088M}}

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}}

Category:G-type main-sequence stars

Category:Planetary systems with one confirmed planet

Category:Planetary transit variables