54 Arietis
{{Short description|Star in the constellation Aries}}
{{Starbox begin}}
{{Starbox image
| image = 250px
| caption = A light curve for 54 Arietis, plotted from Hipparcos data
}}
{{Starbox observe
| epoch = J2000
| constell = Aries
| dec = {{DEC|+18|47|42.1886}}
}}
{{Starbox character
| type = AGB
| u-b =
| variable =
}}
{{Starbox astrometry
| radial_v = {{Val|+44.32|0.22}}
| parallax = 4.3947
| p_error = 0.1037
}}
{{Starbox detail
| mass =
| radius = {{Val|40.7|3.0|2.6}}
| temperature = {{Val|4013|137|141}}
| rotational_velocity =
| gravity =
| metal_fe =
| age_gyr =
}}
{{Starbox catalog
| names = {{odlist | F=54 Ari | BD=+18°414 | FK5=4285 | GJ= | HD=19460 | HIP=14586 | HR=940 | SAO=93293 | GC=3742 }}
}}
{{Starbox reference
| Simbad = 54+Ari
}}
{{Starbox end}}
54 Arietis is a star in the northern zodiac constellation of Aries. 54 Arietis is the Flamsteed designation. It is a challenge to view with the naked eye even under good viewing conditions, having an apparent visual magnitude of 6.27. Based upon an annual parallax shift of {{Val|4.39|ul=mas}}, it is located approximately {{Convert|740|ly|pc|abbr=off|lk=on}} distant from Earth, and it is drifting further away with a radial velocity of +44 km/s. The brightness of the star is diminished by 0.15 in magnitude from extinction caused by interstellar gas and dust. The star is positioned near the ecliptic and thus is subject to lunar occultations.
This is an aging red giant star with a stellar classification of M0 III that is currently evolving along the asymptotic giant branch. Having exhausted the supply of hydrogen at its core, the star has expanded to 41 times the Sun's radius. It varies slightly in brightness, with a periodicity of 6.2 days and an amplitude change of 0.0096 in magnitude. On average it is radiating 387 times the luminosity of the Sun from its enlarged photosphere at an effective temperature of 4,013 K.
References
{{reflist|refs=
{{cite simbad | title=54 Ari | access-date=2019-07-31 }}
{{Cite Gaia DR2|58968737038716288}}
| url=https://cdsarc.cds.unistra.fr/viz-bin/ftp-index?/ftp/cats/more/HIP/cdroms/cats
| website=Centre de Données astronomiques de Strasbourg | title=/ftp/cats/more/HIP/cdroms/cats
| publisher=Strasbourg astronomical Data Center | access-date=15 October 2022}}
| last1=Argue | first1=A. N.
| title=UBV photometry of 550 F, G and K type stars
| journal=Monthly Notices of the Royal Astronomical Society
| volume=133 | pages=475–493 | year=1966
| issue=4
| bibcode=1966MNRAS.133..475A | postscript=.
| doi = 10.1093/mnras/133.4.475 | doi-access=free}}
| display-authors=1 | last1=Famaey | first1=B.
| last2=Jorissen | first2=A. | last3=Luri | first3=X.
| last4=Mayor | first4=M. | last5=Udry | first5=S.
| last6=Dejonghe | first6=H. | last7=Turon | first7=C.
| title=Local kinematics of K and M giants from CORAVEL/Hipparcos/Tycho-2 data. Revisiting the concept of superclusters
| journal=Astronomy and Astrophysics
| volume=430 | pages=165–186 | date=January 2005
| doi=10.1051/0004-6361:20041272 | postscript=.
| bibcode=2005A&A...430..165F | arxiv=astro-ph/0409579 | s2cid=17804304 }}
| last1=Koen | first1=Chris | last2=Eyer | first2=Laurent
| title=New periodic variables from the Hipparcos epoch photometry
| journal=Monthly Notices of the Royal Astronomical Society
| volume=331 | issue=1 | pages=45–59 | date=March 2002
| doi=10.1046/j.1365-8711.2002.05150.x | doi-access=free | postscript=.
| bibcode=2002MNRAS.331...45K | arxiv=astro-ph/0112194 | s2cid=10505995 }}
| last1=Eggen | first1=Olin J.
| title=Asymptotic giant branch stars near the sun
| journal=Astronomical Journal | postscript=.
| volume=104 | issue=1 | pages=275–313 | date=July 1992
| doi=10.1086/116239 | bibcode=1992AJ....104..275E }}
| last1=Anderson | first1=E. | last2=Francis | first2=Ch.
| title=XHIP: An extended hipparcos compilation
| journal=Astronomy Letters
| volume=38 | issue=5 | pages=331 | year=2012
| bibcode=2012AstL...38..331A | arxiv=1108.4971
| doi=10.1134/S1063773712050015 | s2cid=119257644 | postscript=. }}
| title=Lunar occultation summary. III | postscript=.
| last1=Eitter | first1=J. J. | last2=Beavers | first2=W. I.
| journal=Astrophysical Journal Supplement Series
| volume=40 | pages=475–486 | date=June 1979
| doi=10.1086/190595 | bibcode=1979ApJS...40..475E | doi-access=free }}
See event #419 for example.
}}
External links
- [http://webviz.u-strasbg.fr/viz-bin/VizieR-S?HR%20940 HR 940]
- [http://aladin.u-strasbg.fr/AladinPreview?-c=03+08+21.1090%2B18+47+42.190&ident=*++54+Ari&submit=Aladin+previewer Image 54 Arietis]
{{Stars of Aries}}
{{DEFAULTSORT:54 Arietis}}
Category:Asymptotic-giant-branch stars
Category:Aries (constellation)