1 Arietis
{{Short description|Double star in the constellation Aries}}
{{Starbox begin}}
{{Starbox observe
| epoch = J2000
| dec = {{DEC|+22|16|31.2100}}
| appmag_v = 5.86 (6.4/7.2)
| constell = Aries
}}
{{Starbox character
| class={{nowrap|K1 III + A6 V}}
| variable=
}}
{{Starbox astrometry
| radial_v = {{Val|6.95|0.13}}
| parallax = 5.57
| p_error = 0.75
}}
{{Starbox detail
| mass =
| radius =
| temperature =
| metal_fe =
| rotational_velocity=
| age_myr =
}}
{{Starbox catalog
| names= {{odlist | F=1 Ari | BD=+21°243 | HIP=8544 | HR=530 | SAO=74966 | ADS=1457 | WDS=J01501+2217 }}
| component1 = 1 Ari A
| names1 = HD 11154.
| component2 = 1 Ari B
| names2 = HD 11155.
}}
{{Starbox reference
| Simbad = 1+Ari
}}
{{Starbox end}}
1 Arietis is a double star in the northern constellation of Aries. 1 Arietis is the Flamsteed designation. The pair have a combined visual magnitude of 5.86, making it faintly visible to the naked eye. Based upon an annual parallax shift of 5.57 mas, the distance to the two stars is approximately {{Convert|590|ly|pc|abbr=off|lk=on}}. As of 2016, the secondary had an angular separation of {{Val|2.90|ul=arcsecond}} along a position angle of 165° from the primary. They are moving further from the Earth with a heliocentric radial velocity of +7 km/s.
The brighter star, designated component A, is a magnitude 6.40 giant star with a stellar classification of K1 III. The companion star, component B, is a magnitude 7.20 A-type main sequence star with a classification of A6 V. Helmut Abt (1985) had this star classified as A3 IV, matching a more evolved subgiant.
References
{{reflist|refs=
| title=XHIP: An extended hipparcos compilation
| last1=Anderson | first1=E. | last2=Francis | first2=Ch.
| journal=Astronomy Letters
| volume=38 | issue=5 | pages=331 | year=2012
| bibcode=2012AstL...38..331A | doi=10.1134/S1063773712050015
| arxiv=1108.4971 | s2cid=119257644 | postscript=. }}
| display-authors=1 | last1=Mason | first1=B. D.
| last2=Wycoff | first2=G. L. | last3=Hartkopf | first3=W. I.
| last4=Douglass | first4=G. G. | last5=Worley | first5=C. E.
| title=The Washington Visual Double Star Catalog
| year=2014 | bibcode=2001AJ....122.3466M | postscript=.
| doi=10.1086/323920 | volume=122
| journal=The Astronomical Journal | issue=6 | pages=3466–3471 | doi-access=free }}
| last1=Abt | first1=H. A.
| title=Visual multiples. VIII - 1000 MK types
| journal=Astrophysical Journal Supplement Series
| volume=59 | date=September 1985 | pages=95–112
| doi=10.1086/191064 | bibcode=1985ApJS...59...95A | doi-access=free }}
{{cite journal
| last=van Leeuwen | first=F.
| year=2007
| title=Validation of the new Hipparcos reduction
| journal=Astronomy and Astrophysics
| volume=474 | issue=2 | pages=653–664
| arxiv=0708.1752
| bibcode=2007A&A...474..653V
| doi=10.1051/0004-6361:20078357
| s2cid=18759600
}}
{{cite journal
| last1=Nicolet | first1=B.
| year=1978
| title=Photoelectric photometric Catalogue of homogeneous measurements in the UBV System
| journal=Astronomy and Astrophysics Supplement Series
| volume=34 | pages=1–49
| bibcode=1978A&AS...34....1N
}}
{{cite journal
| last1=Eggleton | first1=P. P.
| last2=Tokovinin | first2=A. A.
| year=2008
| title=A catalogue of multiplicity among bright stellar systems
| journal=Monthly Notices of the Royal Astronomical Society
| volume=389 | issue=2 | pages=869–879
| arxiv=0806.2878
| bibcode=2008MNRAS.389..869E
| doi=10.1111/j.1365-2966.2008.13596.x
| doi-access=free
| s2cid=14878976
}}
{{cite simbad
|title=* 1 Ari
|accessdate=2012-07-18
}}
}}
External links
- [http://webviz.u-strasbg.fr/viz-bin/VizieR-S?CCDM%20J01501%2b2217A CCDM J01501+2217A]
- [http://aladin.u-strasbg.fr/AladinPreview?-c=HD++11154&ident=HD++11154&submit=Aladin+previewer Image 1 Arietis]
{{Stars of Aries}}
{{DEFAULTSORT:1 Arietis}}
Category:A-type main-sequence stars
Category:Aries (constellation)