Mu Arietis

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Template:Short description

μ Arietis
Template:Location mark
Location of μ Arietis (circled)
Observation data
Epoch J2000      Equinox J2000
Constellation Aries[1]
Right ascension Template:RA[2]
Declination Template:DEC[2]
Apparent magnitude (V) 5.74[3] (6.38/8.38/6.72/12.2)[4]
Characteristics
Spectral type A0 Vp + F2 V + A1 V[4]
U−B Template:Engvar −0.03[5]
B−V Template:Engvar −0.02[5]
Astrometry
Radial velocity (Rv)−6.0[6] km/s
Proper motion (μ) RA: +29.086 mas/yr[2]
Dec.: −46.133 mas/yr[2]
Parallax (π)7.5702±0.1425 mas[2]
DistanceTemplate:Rnd ± Template:Rnd ly
(Template:Rnd ± Template:Rnd pc)
Absolute magnitude (MV)+0.41[1]
Orbit[7]
Period (P)8.845±0.046 yr
Semi-major axis (a)0.0563±0.0008″
Eccentricity (e)0.337±0.023
Inclination (i)71.2±1.1°
Longitude of the node (Ω)101.0±1.0°
Periastron epoch (T)B 1981.099±0.063
Argument of periastron (ω)
(secondary)		92.3±1.7°
Details
μ Ari Aa
Mass3.4±1.7[7] Template:Solar mass
Luminosity71.7[1] Template:Solar luminosity
Rotational velocity (v sin i)175[8] km/s
μ Ari Ab
Mass2.1±1.7[7] Template:Solar mass
Metallicity [Fe/H]{{{metal_fe2}}} dex
Other designations
Template:Odlist[9]
Database references
SIMBADdata

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Mu Arietis is a multiple star system in the northern constellation of Aries. Its name is a Bayer designation that is Latinized from μ Arietis, and abbreviated Mu Ari or μ Ari. This system is approximately Template:Convert distant from Earth, give or take a 8 light-year margin of error, and has a combined apparent visual magnitude of 5.74.[3] According to the Bortle Dark-Sky Scale, this means it is faintly visible to the naked eye from dark suburban skies. The system is positioned near the ecliptic and is subject to lunar occultation.[7]

At the heart of this system is a close orbiting pair, designated μ Ari Aa, consisting of a magnitude 6.38 A-type main sequence star with a stellar classification of A0 Vp, and a magnitude 8.38 F-type main sequence companion with a classification of F2 V. These two components have an angular separation of 0.04 arcseconds. A third component, designated μ Ari Ab, consists of a magnitude 6.72 star with a classification of A1 V, orbiting the inner pair with a period of 8.845 years and an eccentricity of 0.34.[4] The orbit of this star has been measured using lunar occultations.[7] A smaller fourth component, μ Ari B, at an angular separation of 19.1 arcseconds, has a magnitude of 12.2.[4]

References

Template:Reflist

External links

Template:Stars of Aries

  1. ↑ a b c Cite error: Invalid <ref> tag; no text was provided for refs named Anderson2012
  2. ↑ a b c d Cite error: Invalid <ref> tag; no text was provided for refs named GaiaDR3
  3. ↑ a b Cite error: Invalid <ref> tag; no text was provided for refs named aaass89_2_415
  4. ↑ a b c d Cite error: Invalid <ref> tag; no text was provided for refs named mnras389_2_869
  5. ↑ a b Cite error: Invalid <ref> tag; no text was provided for refs named atao6_148
  6. ↑ Cite error: Invalid <ref> tag; no text was provided for refs named rob135_385
  7. ↑ a b c d e Cite error: Invalid <ref> tag; no text was provided for refs named Mason_1997
  8. ↑ Cite error: Invalid <ref> tag; no text was provided for refs named aaa463_2_671
  9. ↑ Cite error: Invalid <ref> tag; no text was provided for refs named SIMBAD
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