1 Arietis
Appearance
Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Aries |
Right ascension | 01h 50m 08.56984s[1] |
Declination | +22° 16′ 31.2100″[1] |
Apparent magnitude (V) | 5.86[2] (6.40/7.20)[3] |
Characteristics | |
Spectral type | K1 III + A6 V[3] |
U−B color index | +0.50[2] |
B−V color index | +0.74[2] |
Astrometry | |
Radial velocity (Rv) | +1[4] km/s |
Proper motion (μ) | RA: –16.52[1] mas/yr Dec.: –8.25[1] mas/yr |
Parallax (π) | 5.57 ± 0.75 mas[1] |
Distance | approx. 590 ly (approx. 180 pc) |
Other designations | |
1 Ari A: HD 11154. | |
1 Ari B: HD 11155. |
1 Arietis is the Bayer designation for a double star[3] in the northern constellation of Aries. The pair have a combined visual magnitude of 5.86,[2] making it faintly visible to the naked eye. Based upon an annual parallax shift of 5.57 mas,[1] the distance to the two stars is approximately 590 light-years (180 parsecs). The brighter component is a magnitude 6.40 giant star with a stellar classification of K1 III. The companion star, at an angular separation of 2.873 arcseconds from the primary, is a magnitude 7.20 A-type main sequence star with a classification of A6 V.[3]
References
- ^ a b c d e f 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.
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ignored (help) - ^ a b c d 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.
- ^ a b c d 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.
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ignored (help)CS1 maint: unflagged free DOI (link) - ^ Wilson, Ralph Elmer (1953), General Catalogue of Stellar Radial Velocities, Washington: Carnegie Institution of Washington, Bibcode:1953QB901.W495......
- ^ "sig Ari -- Star", SIMBAD Astronomical Database, Centre de Données astronomiques de Strasbourg, retrieved 2012-07-18.