Mu Aquarii

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Template:Short description

Mu Aquarii
Template:Location mark
Location of μ Aquarii (circled)
Observation data
Epoch J2000      Equinox J2000
Constellation Aquarius[1]
Right ascension Template:RA[2]
Declination Template:DEC[2]
Apparent magnitude (V) 4.731[3]
Characteristics
Spectral type A3m[4] or kA4hF1mF3 (III) EuSr[5]
U−B Template:Engvar +0.149[3]
B−V Template:Engvar +0.322[3]
Astrometry
Radial velocity (Rv)−9.1[6] km/s
Proper motion (μ) RA: +45.75 mas/yr
Dec.: −33.59 mas/yr
Parallax (π)20.74±0.29 mas[2]
DistanceTemplate:Rnd ± Template:Rnd ly
(Template:Rnd ± Template:Rnd pc)
Absolute magnitude (MV)+1.31[1]
Orbit[7]
Period (P)Script error: No such module "val".
Semi-major axis (a)≥ Script error: No such module "convert".
Eccentricity (e)Script error: No such module "val".
Periastron epoch (T)Script error: No such module "val".
Semi-amplitude (K1)
(primary)		Script error: No such module "val". km/s
Details
A
Mass2.059±0.103[8] Template:Solar mass
Radius3.151±0.158[8] Template:Solar radius
Luminosity25.6±1.4[9] Template:Solar luminosity
Surface gravity (log g)3.99[9] cgs
TemperatureScript error: No such module "val".[9] K
Rotational velocity (v sin i)53.7[9] km/s
Metallicity [Fe/H]{{{metal_fe2}}} dex
Other designations
Template:Odlist[10]
Database references
SIMBADdata

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Mu Aquarii is the for a binary star[11] system in the equatorial constellation of Aquarius. Its name is a Bayer designation that is Latinized from μ Aquarii, and abbreviated Mu Aqr or μ Aqr. The star is visible to the naked eye with a combined apparent visual magnitude of 4.7.[3] Based upon parallax measurements, the distance to this system is about Script error: No such module "convert"..[2] It is drifting closer to the Sun with a radial velocity of −9.1 km/s.[6]

This star was tentatively identified as a single-lined spectroscopic binary by Helmut A. Abt in 1961.[12] It has an orbital period of Script error: No such module "convert". and an eccentricity (ovalness) of 0.23.[7] The pair have been resolved by speckle interferometry, showing an angular separation of Script error: No such module "val"..[13]

The visible spectrum matches a stellar classification of A3m, with the 'm' suffix indicating that this is an Am, or chemically peculiar star.[4] A 2020 classification of kA4hF1mF3 (III) EuSr,[5] indicates ionized calcium (k) lines match a class of A4, hydrogen lines (h) a class of F1, and metal lines (m) F3. There are also abundance anomalies of europium (Eu) and strontium (Sr). The primary has double the mass of the Sun and 3.5 times the Sun's radius,[8] It is radiating 26 times the luminosity of the Sun from its photosphere at an effective temperature of 6,906 K.[14]

This star together with ν Aquarii is Albulaan Template:IPAc-en, derived from an Arabic term al-bulaʽān (ألبولعان) meaning "the two swallowers". This star, along with ε Aqr (Albali) and ν Aqr (Albulaan), were al Bulaʽ (البلع), the Swallower.[15][16] In Chinese, Script error: No such module "Lang". (Script error: No such module "Lang".), meaning Girl (asterism) (or Woman), refers to an asterism consisting of μ Aquarii, ε Aquarii, 4 Aquarii, 5 Aquarii and 3 Aquarii.[17] Consequently, the Chinese name for μ Aquarii itself is Script error: No such module "Lang". (Script error: No such module "Lang"., Template:Langx.)[18]

References

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  1. ↑ a b Script error: No such module "citation/CS1".
  2. ↑ a b c d Script error: No such module "citation/CS1".
  3. ↑ a b c d Script error: No such module "citation/CS1".
  4. ↑ a b Script error: No such module "citation/CS1".
  5. ↑ a b Script error: No such module "citation/CS1".
  6. ↑ a b Script error: No such module "Citation/CS1".
  7. ↑ a b Script error: No such module "citation/CS1".
  8. ↑ a b c Script error: No such module "citation/CS1".
  9. ↑ a b c d Script error: No such module "citation/CS1".Script error: No such module "Unsubst".
  10. ↑ Template:Cite simbad
  11. ↑ Script error: No such module "citation/CS1".
  12. ↑ Script error: No such module "citation/CS1".
  13. ↑ Script error: No such module "citation/CS1".
  14. ↑ Template:Cite Gaia DR2
  15. ↑ Script error: No such module "citation/CS1".
  16. ↑ Script error: No such module "citation/CS1".
  17. ↑ Template:In lang 中國星座神話, written by 陳久金. Published by 台灣書房出版有限公司, 2005, Template:ISBN.
  18. ↑ Template:In lang AEEA (Activities of Exhibition and Education in Astronomy) 天文教育資訊網 2006 年 5 月 14 日 Template:Webarchive

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External links

Template:Stars of Aquarius

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