1 Arietis
| Observation data EpochJ2000EquinoxJ2000 | |
|---|---|
| Constellation | Aries |
| Right ascension | 01h50m08.56984s[1] |
| Declination | +22° 16′ 31.2100″[1] |
| Apparent magnitude(V) | 5.86[2](6.4/7.2)[3] |
| Characteristics | |
| Spectral type | K1 III + A6 V[3] |
| U−Bcolor index | +0.5[2] |
| B−Vcolor index | +0.74[2] |
| Astrometry | |
| Radial velocity(Rv) | 6.95±0.13[4]km/s |
| Proper motion(μ) | RA:–16.52[1]mas/yr Dec.:–8.25[1]mas/yr |
| Parallax(π) | 5.57 ± 0.75mas[1] |
| Distance | approx. 590ly (approx. 180pc) |
| Absolute magnitude(MV) | −0.39[4] |
| Details | |
| Luminosity | 141.51[4]L☉ |
| Other designations | |
| 1 Ari A:HD11154. | |
| 1 Ari B:HD11155. | |
| Database references | |
| SIMBAD | data |
1 Arietisis adouble star[3]in the northernconstellationofAries.1 Arietisis theFlamsteed designation.The pair have a combinedvisual magnitudeof 5.86,[2]making it faintly visible to the naked eye. Based upon an annualparallaxshift of 5.57mas,[1]the distance to the two stars is approximately 590light-years(180parsecs). As of 2016, the secondary had anangular separationof2.90″along aposition angleof 165° from the primary.[6]They are moving further from the Earth with a heliocentricradial velocityof +7 km/s.[4]
The brighter star, designated component A, is a magnitude 6.40giant starwith astellar classificationof K1 III. The companion star, component B, is a magnitude 7.20A-type main sequence starwith a classification of A6 V.[3]Helmut Abt (1985) had this star classified as A3 IV,[7]matching a moreevolvedsubgiant.
References
[edit]- ^abcdef van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction".Astronomy and Astrophysics.474(2): 653–664.arXiv:0708.1752.Bibcode:2007A&A...474..653V.doi:10.1051/0004-6361:20078357.S2CID18759600.
- ^abcd Nicolet, B. (1978). "Photoelectric photometric Catalogue of homogeneous measurements in the UBV System".Astronomy and Astrophysics Supplement Series.34:1–49.Bibcode:1978A&AS...34....1N.
- ^abcd Eggleton, P. P.; Tokovinin, A. A. (2008)."A catalogue of multiplicity among bright stellar systems".Monthly Notices of the Royal Astronomical Society.389(2): 869–879.arXiv:0806.2878.Bibcode:2008MNRAS.389..869E.doi:10.1111/j.1365-2966.2008.13596.x.S2CID14878976.
- ^abcdAnderson, E.; Francis, Ch. (2012), "XHIP: An extended hipparcos compilation",Astronomy Letters,38(5): 331,arXiv:1108.4971,Bibcode:2012AstL...38..331A,doi:10.1134/S1063773712050015,S2CID119257644.
- ^ "* 1 Ari".SIMBAD.Centre de données astronomiques de Strasbourg.Retrieved2012-07-18.
- ^Mason, B. D.; et al. (2014), "The Washington Visual Double Star Catalog",The Astronomical Journal,122(6): 3466–3471,Bibcode:2001AJ....122.3466M,doi:10.1086/323920.
- ^Abt, H. A. (September 1985), "Visual multiples. VIII - 1000 MK types",Astrophysical Journal Supplement Series,59:95–112,Bibcode:1985ApJS...59...95A,doi:10.1086/191064
