{{Short description|Star in the constellation Apus}} {{Starbox begin | name = α Apodis }} {{Starbox image | image= {{Location mark | image=Apus IAU.svg | alt=Diagram showing star positions and boundaries of the Apus constellation and its surroundings | float=center | width=260 | label=|position=right | mark=Red circle.svg | mark_width=10 | mark_link=α Apo | x%=58.1 | y%=54.6 }} | caption=Location of α Apodis (circled) }} {{Starbox observe | epoch = J2000 | constell = Apus | ra = {{RA|14|47|51.71203}}<ref name=GaiaDR3/> | dec = {{DEC|−79|02|41.1032}}<ref name=GaiaDR3/> | appmag_v=3.83<ref name=clpl4_99/> }} {{Starbox character | type = red giant branch<ref name=GaiaDR3/> | class = K3IIICN0.5<ref name=Keenan_McNeil_1989/> | u-b = +1.68<ref name=clpl4_99/> | b-v = +1.43<ref name=clpl4_99/> | r-i = +0.53<ref name=bsc1 /> | variable = }} {{Starbox astrometry | radial_v = −1.1<ref name=rgcrv/> | prop_mo_ra = −5.133 | prop_mo_dec = −16.299 | pm_footnote = <ref name=GaiaDR3/> | parallax = 6.5509 | p_error = 0.1133 | parallax_footnote = <ref name=GaiaDR3/> | absmag_v = −1.67<ref name=Cardini2005/> }} {{Starbox detail | mass = {{val|4.46|0.22}}<ref name="kervella"/> | radius = {{val|59.51|2.98|u=Solar radius}}<ref name="kervella"/><br/>{{solar radius calculator|type=logLT|1=3.03|logLerr=0.06|2=4090|Terr=80}}<ref name="lithium"/>{{efn | name=radius | Applying the Stefan–Boltzmann law with a nominal solar effective temperature of 5,772 K: :<math>\sqrt{\biggl(\frac{5,772}{4,090}\biggr)^4 \cdot 10^{3.03}} = 65.19\ R_\odot</math>.}} | luminosity = 1,072{{±|22}}<ref name="lithium"/> | temperature = 4,090{{±|80}}<ref name="lithium"/> | metal_fe = −0.3<ref name="lithium"/> | rotational_velocity = }} {{Starbox catalog | names = {{odlist | name=Paradys | B=α Aps, Alpha Apodis, Alpha Aps | CPD=−78°893 | FK5=542 | HD=129078 | HIP=72370 | HR=5470 | SAO=257193 }}<ref name=SIMBAD/> }} {{Starbox reference | Simbad=*+alf+Aps }} {{Starbox end}}
'''Alpha Apodis''', also named '''Paradys''',<ref name="IAU-CSN-new"/> is the brightest star in the southern circumpolar constellation of Apus. It had the Greek alpha designation as part of the constellation which Johann Bayer called Apis Indica in his 1603 ''Uranometria'' star atlas.<ref name=ridpath/> This identifier is a Bayer designation that is Latinized from α Apodis, and abbreviated Alpha Aps or α Aps, respectively. The star has an apparent visual magnitude of approximately 3.825,<ref name=kaler/> which can be viewed with the naked eye. With a declination of –79°, this is a circumpolar star for much of the southern hemisphere. It can be identified on the night sky by drawing an imaginary line through Alpha Centauri and Alpha Circini then extending it toward the south celestial pole.<ref name=moore2000/>
This is a giant star with a stellar classification of K3IIICN0.5,<ref name=Keenan_McNeil_1989/> indicating that this star has consumed the hydrogen at its core and has evolved away from the main sequence. The CN0.5 notation indicates a mild overabundance of the cyanide (CN) molecule. The star has expanded to an estimated radius of about 65 times the radius of the Sun and is emitting 1,000 times the Sun's luminosity. The photosphere has an effective temperature of 4,090 K,<ref name="lithium"/> giving the star the characteristic orange hue of a K-type star.<ref name=csiro/> Based upon parallax measurements, this star is {{val|498|9|ul=ly}} from the Earth.<ref name=GaiaDR3/> It is not known to have a companion.<ref name=mnras389_2_869/>
==Naming== In Chinese caused by adaptation of the European southern hemisphere constellations into the Chinese system, {{lang|zh|異雀}} ({{lang|zh-Latn|Yì Què}}), meaning ''Exotic Bird'', refers to an asterism consisting of α Apodis, ζ Apodis, ι Apodis, β Apodis, γ Apodis, δ Octantis, δ<sup>1</sup> Apodis, η Apodis, and ε Apodis. Consequently, α Apodis itself is known as {{lang|zh|異雀八}} ({{lang|zh-Latn|Yì Què bā}}, {{langx|en|the Eighth Star of Exotic Bird}}.)<ref>{{in lang|zh}} [http://aeea.nmns.edu.tw/2006/0607/ap060729.html AEEA (Activities of Exhibition and Education in Astronomy) 天文教育資訊網 2006 年 7 月 29 日] {{Webarchive|url=https://web.archive.org/web/20110522124325/http://aeea.nmns.edu.tw/2006/0607/ap060729.html |date=2011-05-22 }}</ref>
''Paradys-vogel'' was the original Dutch name for the constellation Apus, which represents a bird-of-paradise.<ref name=ridpath/> The IAU Working Group on Star Names approved the name Paradys for this star on 18 May 2025 and it is now so entered in the IAU Catalog of Star Names.<ref name="IAU-CSN-new"/>
==Notes== {{Notelist}}
==References== {{reflist|30em|refs=
<ref name=GaiaDR3>{{Cite Gaia DR3|5773473920382493440}}</ref>
<ref name=Keenan_McNeil_1989>{{citation | postscript=. | title=The Perkins catalog of revised MK types for the cooler stars | last1=Keenan | first1=Philip C. | last2=McNeil | first2=Raymond C. | journal=The Astrophysical Journal Supplement Series | volume=71 | pages=245 | year=1989 | doi=10.1086/191373 | s2cid=123149047 | bibcode=1989ApJS...71..245K }}</ref>
<ref name=Cardini2005>{{citation | title=Mg II chromospheric radiative loss rates in cool active and quiet stars | last1=Cardini | first1=D. | postscript=. | journal=Astronomy and Astrophysics | volume=430 | pages=303–311 | date=January 2005 | issue=1 | doi=10.1051/0004-6361:20041440 | bibcode=2005A&A...430..303C |arxiv = astro-ph/0409683 | s2cid=12136256 }}</ref>
<ref name=rgcrv>{{citation | last=Evans | first=D. S. | date=June 20–24, 1966 | editor1-last=Batten | editor1-first=Alan Henry | editor2-last=Heard | editor2-first=John Frederick | title=The Revision of the General Catalogue of Radial Velocities | work=Determination of Radial Velocities and their Applications, Proceedings from IAU Symposium no. 30 | volume=30 | page=57 | location=University of Toronto | publisher=International Astronomical Union | bibcode=1967IAUS...30...57E | postscript=.}}</ref>
<ref name=clpl4_99>{{cite journal | display-authors=1 | last1=Johnson | first1=H. L. | last2=Iriarte | first2=B. | last3=Mitchell | first3=R. I. | last4=Wisniewskj | first4=W. Z. | title=UBVRIJKL photometry of the bright stars | journal=Communications of the Lunar and Planetary Laboratory | volume=4 | issue=99 | year=1966 | page=99 | bibcode=1966CoLPL...4...99J }}</ref>
<ref name=SIMBAD>{{citation | title=alf Aps -- Star | work=SIMBAD | publisher=Centre de Données astronomiques de Strasbourg | url=http://simbad.u-strasbg.fr/simbad/sim-id?Ident=HD+129078 | accessdate=2011-12-23 | postscript=.}}</ref>
<ref name=kaler>{{citation | title=Alpha Aps | work=Stars | first=James B. | last=Kaler | publisher=University of Illinois | url=http://www.astro.uiuc.edu/~kaler/sow/alphaaps.html | accessdate=2011-12-23 | postscript=. | url-status=dead | archiveurl=https://web.archive.org/web/20081202222134/http://www.astro.uiuc.edu/~kaler/sow/alphaaps.html | archivedate=2008-12-02 }}</ref>
<ref name="kervella">{{Cite journal |last1=Kervella |first1=Pierre |last2=Arenou |first2=Frédéric |last3=Mignard |first3=François |last4=Thévenin |first4=Frédéric |date=2019-03-01 |title=Stellar and substellar companions of nearby stars from Gaia DR2. Binarity from proper motion anomaly |url=https://ui.adsabs.harvard.edu/abs/2019A&A...623A..72K |journal=Astronomy and Astrophysics |volume=623 |pages=A72 |doi=10.1051/0004-6361/201834371 |issn=0004-6361|arxiv=1811.08902 |bibcode=2019A&A...623A..72K }}</ref>
<ref name="lithium">{{Cite journal |last1=Charbonnel |first1=C. |last2=Lagarde |first2=N. |last3=Jasniewicz |first3=G. |last4=North |first4=P. L. |last5=Shetrone |first5=M. |last6=Krugler Hollek |first6=J. |last7=Smith |first7=V. V. |last8=Smiljanic |first8=R. |last9=Palacios |first9=A. |last10=Ottoni |first10=G. |date=2020-01-01 |title=Lithium in red giant stars: Constraining non-standard mixing with large surveys in the Gaia era |url=https://ui.adsabs.harvard.edu/abs/2020A&A...633A..34C |journal=Astronomy and Astrophysics |volume=633 |pages=A34 |doi=10.1051/0004-6361/201936360 |issn=0004-6361|arxiv=1910.12732 |bibcode=2020A&A...633A..34C }}</ref>
<ref name=mnras389_2_869>{{citation | last1=Eggleton | first1=P. P. | last2=Tokovinin | first2=A. A. | title=A catalogue of multiplicity among bright stellar systems | journal=Monthly Notices of the Royal Astronomical Society | volume=389 | issue=2 | pages=869–879 | date=September 2008 | doi=10.1111/j.1365-2966.2008.13596.x | doi-access=free | bibcode=2008MNRAS.389..869E | arxiv=0806.2878 | s2cid=14878976 | postscript=.}}</ref>
<ref name=bsc1>[http://webviz.u-strasbg.fr/viz-bin/VizieR-5?-out.add=.&-source=V/50/catalog&recno=5470 HR 5470], database entry, The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version), D. Hoffleit and W. H. Warren, Jr., CDS ID [http://vizier.u-strasbg.fr/viz-bin/Cat?V/50 V/50]. Accessed online October 3, 2008.</ref>
<ref name=ridpath>{{citation | first1=Ian | last1=Ridpath | title=Apus, the bird of paradise | work=Ian Ridpath's Star Tales | url=http://www.ianridpath.com/startales/apus.htm | accessdate=2011-12-25 | postscript=.}}</ref>
<ref name=moore2000>{{citation | first1=Patrick | last1=Moore | title=Exploring the night sky with binoculars | edition=4th | publisher=Cambridge University Press | year=2000 | isbn=0-521-79390-4 | page=113 | url=https://books.google.com/books?id=Jvbtl2Vyxm4C&pg=PA113 | postscript=.}}</ref>
<ref name=csiro>{{citation|title=The Colour of Stars |date=December 21, 2004 |work=Australia Telescope, Outreach and Education |publisher=Commonwealth Scientific and Industrial Research Organisation |url=http://outreach.atnf.csiro.au/education/senior/astrophysics/photometry_colour.html |accessdate=2012-01-16 |postscript=. |url-status=dead |archiveurl=https://web.archive.org/web/20120222183238/http://outreach.atnf.csiro.au/education/senior/astrophysics/photometry_colour.html |archivedate=February 22, 2012 }}</ref>
<ref name="IAU-CSN-new">{{cite web |title=IAU Catalog of Star Names |url=https://exopla.net/star-names/modern-iau-star-names/ |access-date=25 May 2025}}</ref>
}}
{{Stars of Apus}}
Category:K-type giants Category:Apus Apodis, Alpha 5470 129078 072370 PD-78 00893 Apodis, 14 Paradys Category:Lucidae