See soorce fer Fomalhaut

{{Starbox begin |
   name=Fomalhaut  }}
{{Starbox image |
  image=[[File:Heic0821f.jpg|250px]] |
  caption=DSS image o Fomalhaut, field o view 2.7×2.9 degrees.<br />Credit NASA, ESA, an the Deegitised Sky Survey 2. Acknowledgment: Davide De Martin (ESA/Hubble) }}
{{Starbox observe 3s|
  epoch=J2000 |
  constell=[[Piscis Austrinus]] (Fomalhaut A+B), [[Aquarius (constellation)|Aquarius]] (Fomalhaut C)|
  pronounce={{IPAc-en|ˈ|f|oʊ|m|əl|.|h|ɔː|t}}, {{IPAc-en|ˈ|f|oʊ|m|əl|ɔː|t}}, {{IPAc-en|f|oʊ|m|əl|ˈ|h|ɔː|t}} |
  component1=Fomalhaut |
  ra1={{RA|22|57|39.0465}}<ref name=aaa474_2_653>{{Cite journal | last1=van Leeuwen | first1=F. | title=Validation of the new Hipparcos reduction | journal=Astronomy and Astrophysics | volume=474 | issue=2 |date=November 2007 | pages=653–664 | doi=10.1051/0004-6361:20078357 | bibcode=2007A&A...474..653V | arxiv=0708.1752 | postscript=.}}</ref> |
  dec1={{DEC|−29|37|20.050}}<ref name=aaa474_2_653/> |
  appmag_v1=1.16 |
  component2=TW Piscis Austrini |
  ra2={{RA|22|56|24.05327}}<ref name=aaa474_2_653/> |
  dec2={{DEC|−31|33|56.0351}}<ref name=aaa474_2_653/> |
  appmag_v2=6.48<ref name="SIMBAD">{{cite web
 | title=V* TW PsA -- Variable of BY Dra type | work=SIMBAD
 | publisher=Centre de Données astronomiques de Strasbourg
 | url=http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=GJ+879&submit=SIMBAD+search
 | accessdate=2010-01-20 }}</ref> |
  component3=LP 876-10 |
  ra3={{RA|22|48|04.47}}<ref name="SIMBAD-fomC">{{cite web
 | title=LP 876-10 -- Double or multiple star | work=SIMBAD
 | publisher=Centre de Données astronomiques de Strasbourg
 | url=http://simbad.u-strasbg.fr/simbad/sim-id?protocol=html&Ident=LP+876-10
 | accessdate=2014-07-30}}</ref> |
  dec3={{DEC|-24|22|07.5}}<ref name="SIMBAD-fomC"/> |
  appmag_v3=12.618<ref name="SIMBAD-fomC"/>}}
{{Starbox character |
  class=A3 V / K5Vp / M4V<ref name="SIMBAD-fomC"/><ref name=aaa505_1_205>{{citation | display-authors=1 | last1=Demory | first1=B.-O. | last2=Ségransan | first2=D. | last3=Forveille | first3=T. | last4=Queloz | first4=D. | last5=Beuzit | first5=J.-L. | last6=Delfosse | first6=X. | last7=di Folco | first7=E. | last8=Kervella | first8=P. | last9=Le Bouquin | first9=J.-B. |date=October 2009 | title=Mass-radius relation of low and very low-mass stars revisited with the VLTI | journal=Astronomy and Astrophysics | volume=505 | issue=1 | pages=205–215  | doi=10.1051/0004-6361/200911976 | bibcode=2009A&A...505..205D |arxiv = 0906.0602 }}</ref> |
  b-v=0.09 / 1.10 / 1.683<ref name="SIMBAD-fomC"/><ref name="clpl4">{{cite journal
 | author=Johnson, H. L.; Iriarte, B.; Mitchell, R. I.; Wisniewskj, W. Z.
 | title=UBVRIJKL photometry of the bright stars
 | journal=Communications of the Lunar and Planetary Laboratory | volume=4 | issue=99 | date=1966
 | bibcode=1966CoLPL...4...99J }}</ref> |
  u-b=0.08 / 1.02 / ?<ref name="clpl4" /> |
  variable=None / [[BY Draconis variable|BY Draconis]] / ? }}
{{Starbox astrometry |
  component1=Fomalhaut |
  radial_v=+6.5 |
  prop_mo_ra=+328.95<ref name=aaa474_2_653/> |
  prop_mo_dec=−164.67<ref name=aaa474_2_653/> |
  parallax=129.81 |
  p_error=0.47 |
  parallax_footnote = <ref name=aaa474_2_653/> |
  absmag_v=1.72<ref name=age_mam>{{Cite journal | last1=Mamajek | first1=E.E. | title=On the Age and Binarity of Fomalhaut | journal=Astrophysical Journal Letters | volume=754 | issue=2 |date=August 2012 | pages=L20 | doi=10.1088/2041-8205/754/2/L20 | bibcode=2012ApJL..754...20M | arxiv=1206.6353}}</ref> |
  component2=TW Piscis Austrini |
  radial_v2=+6<ref name="SIMBAD" /> |
  prop_mo_ra2=−331.11<ref name=aaa474_2_653/> |
  prop_mo_dec2=−158.98<ref name=aaa474_2_653/> |
  parallax2=131.42 |
  p_error2=0.62 |
  parallax_footnote2=<ref name=aaa474_2_653/> |
  absmag_v2=7.08<ref name="age_mam"/> }}
{{Starbox detail
| component1=Fomalhaut
| mass={{val|1.92|0.02}}<ref name=age_mam/>
| age={{val|4.4|0.4|e=8}}<ref name=age_mam/>
| metal_fe = −0.03<ref name=mnras286_3>{{cite journal | title=High-resolution spectroscopy of Vega-like stars - I. Effective temperatures, gravities and photospheric abundances | author=Dunkin, S. K.; Barlow, M. J.; Ryan, Sean G. | journal=Monthly Notices of the Royal Astronomical Society | volume=286 | issue=3 | pages=604–616 |date=April 1997 | bibcode=1997MNRAS.286..604D | last2=Barlow | last3=Ryan | doi=10.1093/mnras/286.3.604}} This paper lists [Fe/H] = −0.03 [[wikt:dex|dex]].</ref> tae −0.34<ref name=aaa490_1>{{cite journal | author=Saffe, C.; Gómez, M.; Pintado, O.; González, E. | title=Spectroscopic metallicities of Vega-like stars | journal=Astronomy and Astrophysics | volume=490 | issue=1 | pages=297–305 |date=October 2008 | doi=10.1051/0004-6361:200810260 | bibcode=2008A&A...490..297S |arxiv = 0805.3936 }} This paper lists [Fe/H] = −0.34 dex.</ref>
| radius={{val|1.842|0.019}}<ref name=age_mam/>
| gravity=4.21<ref name=aaa426/>
| rotational_velocity = 93<ref name=aaa426>{{cite journal | title=VLTI near-IR interferometric observations of Vega-like stars. Radius and age of α PsA, β Leo, β Pic, ɛ Eri and τ Cet | author=Di Folco, E.; Thévenin, F.; Kervella, P.; Domiciano de Souza, A.; Coudé du Foresto, V.; Ségransan, D.; Morel, P. | journal=Astronomy and Astrophysics | volume=426 | pages=601–617 |date=November 2004 | doi=10.1051/0004-6361:20047189 | bibcode=2004A&A...426..601D | issue=2 }} This paper lists [Fe/H] = −0.10 dex.</ref>
| luminosity={{val|16.63|0.48}}<ref name=age_mam/>
| temperature=8,590<ref name=age_mam/>
| component2=TW Piscis Austrini
| mass2={{nowrap|0.725 ± 0.036}}<ref name=aaa505_1_205/>
| radius2={{nowrap|0.629 ± 0.051}}<ref name=aaa505_1_205 />
| luminosity2=0.19<ref name="age_mam"/>
| temperature2={{nowrap|4,711 ± 134}}<ref name=aaa505_1_205/>
| metal2=
| rotation2=
| rotational_velocity2=2.93<ref name=aaa505_1_205/>
| age2=4.4 × 10<sup>8</sup><ref name="age_mam"/> }}
{{Starbox catalog |
  names= |
  component1=Fomalhaut |
  names1=α&nbsp;Piscis&nbsp;Austrini, α&nbsp;PsA, Alpha&nbsp;PsA, 24&nbsp;Piscis&nbsp;Austrini, [[Durchmusterung|CPD]]&nbsp;−30&deg;&nbsp;6685, [[Fifth Fundamental Catalogue|FK5]]&nbsp;867, [[Gliese Catalogue of Nearby Stars|Gl]]&nbsp;881, [[Henry Draper catalogue|HD]]&nbsp;216956, [[Hipparcos catalogue|HIP]]&nbsp;113368, [[Bright Star Catalogue|HR]]&nbsp;8728, [[Smithsonian Astrophysical Observatory Star Catalog|SAO]]&nbsp;191524 |
  component2=TW Piscis Austrini |
  names2=Fomalhaut&nbsp;B, TW&nbsp;PsA, [[Henry L. Giclas catalogue|Gl]]&nbsp;879, [[Harvard Revised catalogue|HR]]&nbsp;8721, [[Cordoba Durchmusterung|CD]]&nbsp;-32°17321, [[Henry Draper catalogue|HD]]&nbsp;216803, [[Luyten Two-Tenths catalogue|LTT]]&nbsp;9283, [[General Catalogue of Trigonometric Parallaxes|GCTP]]&nbsp;5562.00, [[Smithsonian Astrophysical Observatory Star Catalog|SAO]]&nbsp;214197, CP(D)-32&nbsp;6550, [[Hipparcos catalogue|HIP]]&nbsp;113283 |
  component3=LP 876-10 |
  names3=Fomalhaut&nbsp;C, 2MASS&nbsp;J22480446-2422075, NLTT&nbsp;54872, GSC&nbsp;06964-01226 
}}
{{Starbox reference |
  component = Fomalhaut |
  Simbad=Fomalhaut |
  NSTED=Fomalhaut |
  ARICNS=01877 |
  EPE=Fomalhaut }}
{{Starbox reference | no_heading=y
| component = TW Piscis Austrini
| Simbad = HD+216803
| NSTED = <!--Exoplanet Archive name-->
| ARICNS = 01875
| EPE = <!--Name-->}}
{{Starbox end}}
'''Fomalhaut''' ('''Alpha&nbsp;Piscis Austrini''', '''Alpha&nbsp;PsA''', '''α&nbsp;Piscis Austrini''', '''α&nbsp;PsA''') is the brichtest starn in the [[constellation]] [[Piscis Austrinus]] an [[leet o brichtest starns|ane o the brichtest starns]] in the sky.

==References==
{{Reflist}}

{{Sky|22|57|39.1|-|29|37|20|25}}

[[Category:Fomalhaut]]
[[Category:Triple starn seestems]]
[[Category:Bayer objects|Piscis Austrini, Alpha]]
[[Category:Flamsteed objects|Piscis Austrini, 24]]
[[Category:Piscis Austrinus]]
[[Category:Variable starns]]
[[Category:A-teep main-sequence starns]]
[[Category:Arabic wirds an phrases]]
[[Category:Circumstellar disks]]
[[Category:Starns wi proper names]]
[[Category:Castor Moving Group]]
[[Category:Henry Draper Catalogue objects|216956]]
[[Category:Hipparcos objects|113368]]
[[Category:HR objects|8728]]
[[Category:Planetary seestems]]
[[Category:Multi-starn planetary seestems|3]]