1 Arietis

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1 Arietis
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[1] mas
Distance approx. 590 ly
(approx. 180 pc)
Other designations
ADS 1457, BD+21 243, HIP 8544, HR 530, SAO 74966.[5]
1 Ari A: HD 11154.
1 Ari B: HD 11155.

1 Arietis is a double star[3] in the northern constellation of Aries. 1 Arietis is the Flamsteed designation. 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

  1. 1.0 1.1 1.2 1.3 1.4 1.5 Lua error in Module:Citation/CS1/Identifiers at line 47: attempt to index field 'wikibase' (a nil value).
  2. 2.0 2.1 2.2 2.3 Lua error in Module:Citation/CS1/Identifiers at line 47: attempt to index field 'wikibase' (a nil value).
  3. 3.0 3.1 3.2 3.3 Lua error in Module:Citation/CS1/Identifiers at line 47: attempt to index field 'wikibase' (a nil value).
  4. Lua error in Module:Citation/CS1/Identifiers at line 47: attempt to index field 'wikibase' (a nil value).
  5. "Sigma Arietis". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2012-07-18.<templatestyles src="Module:Citation/CS1/styles.css"></templatestyles>

External links