WASP-4

In 2007 the exoplanet WASP-4b was discovered orbiting this star. With an orbital period of just 1.3 days, it is classified as a hot Jupiter. The planet's orbital period appears to be decreasing at a rate of {{val|7.33|0.71}} milliseconds per year, suggesting that its orbit is decaying, with a decay timescale of 15.77{{±|1.57}} million years. Another superjovian planet in the system is suspected.

{{OrbitboxPlanet begin

| table_ref =

}}

{{OrbitboxPlanet

| exoplanet = b

| mass = {{val|1.164|0.082}}

| semimajor = {{val|0.02239|0.00084}}

| period = {{val|1.338231587|(22)}}

| eccentricity = <0.0033

| inclination = {{val|88.02|0.69}}

| radius = {{val|1.312|0.045}}

}}

{{OrbitboxPlanet hypothetical

| exoplanet = c

| mass = {{val|5.47|0.44|p=≥}}

| semimajor = {{val|6.82|0.25}}

| period = {{val|7001.0|6.6}}

| eccentricity =

| inclination =

| radius =

}}

{{Orbitbox end}}

• SuperWASP
• List of extrasolar planets

{{reflist|refs=

{{cite simbad | title=WASP-4 | access-date=2018-09-22 }}

{{Cite Gaia DR3|6535499658122055552}}

{{cite journal | title=VizieR Online Data Catalog: AAVSO Photometric All Sky Survey (APASS) DR9 (Henden+, 2016) | last1=Henden | first1=A. A. | last2=Templeton | first2=M. | last3=Terrell | first3=D. | last4=Smith | first4=T. C. | last5=Levine | first5=S. | last6=Welch | first6=D. | display-authors=1 | journal=VizieR On-line Data Catalog: II/336. Originally Published in: 2015AAS...22533616H | volume=2336 | year=2016 | bibcode=2016yCat.2336....0H }} [http://webviz.u-strasbg.fr/viz-bin/VizieR-5?-out.add=.&-source=II/336/apass9&recno=58061720 Vizier catalog entry ]

{{cite journal | title=Identification of a Constellation From a Position | last1=Roman | first1=Nancy G. | journal=Publications of the Astronomical Society of the Pacific | volume=99 | issue=617 | pages=695–699 | year=1987 | bibcode=1987PASP...99..695R | bibcode-access=free | doi=10.1086/132034 | doi-access=free }} [http://vizier.u-strasbg.fr/vizier/VizieR/constellations.htx Vizier query form ]

{{cite journal | title=WASP-4b: A 12th Magnitude Transiting Hot Jupiter in the Southern Hemisphere | last1=Wilson | first1=D. M. | last2=Gillon | first2=M. | last3=Hellier | first3=C. | last4=Maxted | first4=P. F. L. | last5=Pepe | first5=F. | last6=Queloz | first6=D. | last7=Anderson | first7=D. R. | last8=Collier Cameron | first8=A. | last9=Smalley | first9=B. | last10=Lister | first10=T. A. | last11=Bentley | first11=S. J. | last12=Blecha | first12=A. | last13=Christian | first13=D. J. | last14=Enoch | first14=B. | last15=Haswell | first15=C. A. | last16=Hebb | first16=L. | last17=Horne | first17=K. | last18=Irwin | first18=J. | last19=Joshi | first19=Y. C. | last20=Kane | first20=S. R. | last21=Marmier | first21=M. | last22=Mayor | first22=M. | last23=Parley | first23=N. | last24=Pollacco | first24=D. | last25=Pont | first25=F. | last26=Ryans | first26=R. | last27=Segransan | first27=D. | last28=Skillen | first28=I. | last29=Street | first29=R. A. | last30=Udry | first30=S. | display-authors=1 | journal=The Astrophysical Journal Letters | volume=675 | issue=2 | pages=L113–L116 | year=2008 | arxiv=0801.1509 | bibcode=2008ApJ...675L.113W | bibcode-access=free | doi=10.1086/586735 | doi-access=free | s2cid=10823235 }}

{{cite journal|arxiv=1108.2308|doi=10.1088/0004-6256/142/4/115|title=Terms Photometry of Known Transiting Exoplanets|year=2011|last1=Dragomir|first1=Diana|last2=Kane|first2=Stephen R.|last3=Pilyavsky|first3=Genady|last4=Mahadevan|author4-link=Suvrath Mahadevan|first4=Suvrath|last5=Ciardi|first5=David R.|last6=Zachary Gazak|first6=J.|last7=Gelino|first7=Dawn M.|last8=Payne|first8=Alan|last9=Rabus|first9=Markus|last10=Ramirez|first10=Solange V.|last11=von Braun|first11=Kaspar|last12=Wright|first12=Jason T.|last13=Wyatt|first13=Pamela|journal=The Astronomical Journal|volume=142|issue=4|page=115|bibcode=2011AJ....142..115D|s2cid=118606598}}

{{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.|s2cid=53324330|journal=Astronomy & Astrophysics|volume=577|pages=A90|bibcode=2015A&A...577A..90M}}

{{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}}

{{citation|arxiv=2112.09621|year=2022|title=Characterizing the WASP-4 System with TESS and Radial Velocity Data: Constraints on the Cause of the Hot Jupiter's Changing Orbit and Evidence of an Outer Planet|doi=10.3847/1538-3881/ac686f |last1=Turner |first1=Jake D. |last2=Flagg |first2=Laura |last3=Ridden-Harper |first3=Andrew |last4=Jayawardhana |first4=Ray |journal=The Astronomical Journal |volume=163 |issue=6 |page=281 |bibcode=2022AJ....163..281T |s2cid=245329747 |doi-access=free }}

}}

• {{cite web |url=http://www.superwasp.org/ |title=SuperWASP Homepage |access-date=2008-07-02 |archive-url=https://web.archive.org/web/20021208111324/http://www.superwasp.org/ |archive-date=2002-12-08 |url-status=dead }}
• {{cite web |url=http://www.superwasp.org/press_release2/WASP2007_national_pressV5.pdf |archive-url=https://web.archive.org/web/20080516083642/http://www.superwasp.org/press_release2/WASP2007_national_pressV5.pdf |url-status=dead |archive-date=2008-05-16 |title=UK planet hunters announce three new finds |access-date=2008-07-02 |date=2007-10-30 }}

{{Clear}}

{{Sky|23|34|15.06|-|42|03|41.1|1000}}

{{Stars of Phoenix}}

Category:Phoenix (constellation)

Category:G-type main-sequence stars

Category:Planetary systems with one confirmed planet

Category:Planetary transit variables

4

J23341508-4203411

232

402026209

{{variable-star-stub}}