HAT-P-8

{{Short description|Magnitude 10 F-type star in the constellation Pegasus}}

{{Starbox begin

| name = HAT-P-8

}}

{{Starbox observe

| epoch = J2000.0

| constell = Pegasus

| ra = {{RA|22|52|09.8636}}

| dec = {{DEC|+35|26|49.608}}

| appmag_v = 10.17

}}

{{Starbox character

| class = F

| appmag_1_passband = B

| appmag_1 = 10.77 ± 0.04

| appmag_2_passband = V

| appmag_2 = 10.36 ± 0.03

| appmag_3_passband = J

| appmag_3 = 9.214 ± 0.022

| appmag_4_passband = H

| appmag_4 = 9.004 ± 0.018

| appmag_5_passband = K

| appmag_5 = 8.953 ± 0.013

| variable = planetary transit

}}

{{Starbox astrometry

| radial_v = −22.2{{±|0.3}}

| prop_mo_ra = {{val|74.676|(19)}}

| prop_mo_dec = {{val|14.944|(20)}}

| pm_footnote =

| parallax = 4.6606

| p_error = 0.0208

| parallax_footnote =

}}

{{Starbox detail

| mass = 1.27{{±|0.03}}

| radius = 1.491{{±|0.016|0.014}}

| luminosity =

| gravity = 4.1956{{±|0.0095|0.013}}

| temperature = 6410{{±|140}}

| metal_fe = -0.018{{±|0.0072|0.056}}

| rotational_velocity = 12.6 ± 1.0

| age_gyr = 3.4 ± 1

}}

{{Starbox catalog

| names = {{odlist | 2MASS=J22520985+3526495 | Gaia DR3=1891507552826485632 | GSC=02757-01152 | TYC=2757-1152-1 }}

}}

{{Starbox reference

| Simbad = GSC02757-01152

| EPE = HAT-P-8

}}

HAT-P-8 is a magnitude 10 star located 700 light-years away in Pegasus. It is a F-type star about 28% more massive than the Sun. Two red dwarf companions have been detected around HAT-P-8. The first has a spectral type of M5V and has a mass of {{solar mass|0.22}}. The second is even less massive, at {{solar mass|0.18}}, and its spectral type is M6V.

Planetary system

In 2008 the HATNet Project announced the discovery of extrasolar planet HAT-P-8b around this star. This planet is a hot Jupiter gas giant planet.

{{OrbitboxPlanet begin

| table_ref =

}}

{{OrbitboxPlanet

| exoplanet = b

| mass = {{val|1.354|0.035}}

|radius=1.334{{±|0.013}}

| period = {{val|3.0763458|0.0000024}}

| semimajor = {{val|0.04496|0.00046|0.00045}}

| eccentricity = {{val|0.0060|p=<}}

}}

References

{{Reflist|refs=

{{cite journal | title=WASP-12b and HAT-P-8b are Members of Triple Star Systems | last1=Bechter | first1=Eric B. | last2=Crepp |first2=Justin R. | last3=Ngo | first3=Henry | last4=Knutson | first4=Heather A. | last5=Batygin | first5=Konstantin | last6=Hinkley | first6=Sasha | last7=Muirhead | first7=Philip S. | last8=Johnson | first8=John Asher | last9=Howard | first9=Andrew W. | last10=Montet | first10=Benjamin T. | last11=Matthews | first11=Christopher T. | last12=Morton | first12=Timothy D. | display-authors=1 | journal=The Astrophysical Journal | volume=788 | issue=1 | at=2 | year=2014 | arxiv=1307.6857 | bibcode=2014ApJ...788....2B | doi=10.1088/0004-637X/788/1/2 | s2cid=36306243 }}

{{cite journal | 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 | last1=Bonomo | first1=A. S. | last2=Desidera | first2=S. | last3=Benatti | first3=S. | last4=Borsa | first4=F. | last5=Crespi | first5=S. | last6=Damasso | first6=M. | last7=Lanza | first7=A. F. | last8=Sozzetti | first8=A. | last9=Lodato | first9=G. | last10=Marzari | first10=F. | last11=Boccato | first11=C. | last12=Claudi | first12=R. U. | last13=Cosentino | first13=R. | last14=Covino | first14=E. | last15=Gratton | first15=R. | last16=Maggio | first16=A. | last17=Micela | first17=G. | last18=Molinari | first18=E. | last19=Pagano | first19=I. | last20=Piotto | first20=G. | last21=Poretti | first21=E. | last22=Smareglia | first22=R. | last23=Affer | first23=L. | last24=Biazzo | first24=K. | last25=Bignamini | first25=A. | last26=Esposito | first26=M. | last27=Giacobbe | first27=P. | last28=Hébrard | first28=G. | last29=Malavolta | first29=L. | last30=Maldonado | first30=J. | last31=Mancini | first31=L. | last32=Martinez Fiorenzano | first32=A. | last33=Masiero | first33=S. | last34=Nascimbeni | first34=V. | last35=Pedani | first35=M. | last36=Rainer | first36=M. | last37=Scandariato | first37=G. | display-authors=1 | journal=Astronomy and Astrophysics | volume=602 | at=A107 | date=2017 | arxiv=1704.00373 | bibcode=2017A&A...602A.107B | doi=10.1051/0004-6361/201629882 | s2cid=118923163 }}

{{cite journal | title=Discovery of a Transiting Planet and Eight Eclipsing Binaries in HATNet Field G205 | last1=Latham | first1=David W. | last2=Bakos | first2=Gáspár Á. | last3=Torres | first3=Guillermo | last4=Stefanik | first4=Robert P. | last5=Noyes | first5=Robert W. | last6=Kovács | first6=Géza | last7=Pál1 | first7=András | last8=Marcy | first8=Geoffrey W. | last9=Fischer | first9=Debra A. | last10=Butler | first10=R. Paul | last11=Sipőcz | first11=Brigitta | last12=Sasselov | first12=Dimitar D. | last13=Esquerdo | first13=Gilbert A. | last14=Vogt | first14=Steven S. | last15=Hartman | first15=Joel D. | last16=Kovács | first16=Gábor | last17=Lázár | first17=József | last18=Papp | first18=István | last19=Sári | first19=Pál | display-authors=1 | journal=The Astrophysical Journal | volume=704 | issue=2 | pages=1107–1119 | date=2009 | arxiv=0812.1161 | bibcode=2009ApJ...704.1107L | doi=10.1088/0004-637X/704/2/1107 | s2cid=120615043 }}

{{cite journal | title=A lower radius and mass for the transiting extrasolar planet HAT-P-8 b | url=https://www.aanda.org/articles/aa/full_html/2013/03/aa20291-12/aa20291-12.html | last1=Mancini | first1=L. | last2=Southworth |first2=J. | last3=Ciceri | first3=S. | last4=Fortney | first4=J. J. | last5=Morley | first5=C. V. | last6=Dittmann | first6=J. A. | last7=Tregloan-Reed | first7=J. | last8=Bruni | first8=I. | last9=Barbieri | first9=M. | last10=Evans | first10=D. F. | last11=D'Ago | first11=G. | last12=Nikolov | first12=N. | last13=Henning | first13=Th. | display-authors=1 | journal=Astronomy and Astrophysics | volume=551 | at=A11 | year=2013 | arxiv=1212.3701 | bibcode=2013A&A...551A..11M | doi=10.1051/0004-6361/201220291 | s2cid=118498705 }}

{{cite journal | title=Improved Spectroscopic Parameters for Transiting Planet Hosts | last1=Torres | first1=Guillermo | last2=Fischer | first2=Debra A. | last3=Sozzetti | first3=Alessandro | last4=Buchhave | first4=Lars A. | last5=Winn | first5=Joshua N. | last6=Holman | first6=Matthew J. | last7=Carter | first7=Joshua A. | display-authors=1 | journal=The Astrophysical Journal | volume=757 | issue=2 | at=161 | date=2012 | arxiv=1208.1268 | bibcode=2012ApJ...757..161T | doi=10.1088/0004-637X/757/2/161 | s2cid=16580774 }}

{{cite journal | last1=Wang | first1=Xian-Yu | last2=Wang | first2=Yong-Hao | last3=Wang | first3=Songhu | last4=Wu | first4=Zhen-Yu | last5=Rice | first5=Malena | last6=Zhou | first6=Xu | last7=Hinse | first7=Tobias C. | last8=Liu | first8=Hui-Gen | last9=Ma | first9=Bo | last10=Peng | first10=Xiyan | last11=Zhang | first11=Hui | last12=Yu | first12=Cong | last13=Zhou | first13=Ji-Lin | last14=Laughlin | first14=Gregory | display-authors=1 | title=Transiting Exoplanet Monitoring Project (TEMP). VI. The Homogeneous Refinement of System Parameters for 39 Transiting Hot Jupiters with 127 New Light Curves | journal=The Astrophysical Journal Supplement Series | date=1 July 2021 | volume=255 | issue=1 | at=15 | arxiv=2105.14851 | bibcode=2021ApJS..255...15W | doi=10.3847/1538-4365/ac0835 | s2cid=235253975 | doi-access=free }}

}}

External links

[https://exoplanet.eu/home/ ] [https://web.archive.org/web/20081222150630/http://exoplanet.eu/star.php?st=HAT-P-8 Star : HAT-P-8b]

Category:Pegasus (constellation)

Category:Planetary transit variables

Category:Planetary systems with one confirmed planet

Category:F-type stars

Category:Triple star systems

J22520985+3526495

HAT-P-8

Planetary system

See also

References

External links