Mu Aurigae
Template:Location mark Location of μ Aurigae (circled) | |
| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Auriga[1] |
| Right ascension | Template:RA[2] |
| Declination | Template:DEC[2] |
| Apparent magnitude (V) | +4.88[3] |
| Characteristics | |
| Spectral type | A4 Vm[4][5] (kA3hA8VmA8[6]) |
| U−B Template:Engvar | +0.10[3] |
| B−V Template:Engvar | +0.18[3] |
| Astrometry | |
| Radial velocity (Rv) | Template:Val[7] km/s |
| Proper motion (μ) | RA: −20.673 mas/yr[2] Dec.: −75.488 mas/yr[2] |
| Parallax (π) | 20.1016±0.5023 mas[2] |
| Distance | Template:Rnd ± Template:Rnd ly (Template:Rnd ± Template:Rnd pc) |
| Absolute magnitude (MV) | +1.47[1] |
| Details | |
| Mass | 1.90±0.30[8] Template:Solar mass |
| Radius | 2.53±0.09[8] Template:Solar radius |
| Luminosity | 22.8±1.2[8] Template:Solar luminosity |
| Surface gravity (log g) | 3.91±0.08[8] cgs |
| Temperature | 7,931±126[8] K |
| Metallicity [Fe/H] | −0.3[9] dex |
| Rotational velocity (v sin i) | 80.0[9] km/s |
| Age | 560[10] Myr |
| Metallicity [Fe/H] | {{{metal_fe2}}} dex |
| Other designations | |
| Template:Odlist[11] | |
| Database references | |
| SIMBAD | data |
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Mu Aurigae is a candidate binary star[12] system in the northern constellation of Auriga. Its name is a Bayer designation that is Latinized from μ Aurigae, and abbreviated Mu Aur or μ Aur. This star is visible to the naked eye with an apparent visual magnitude of +4.88.[3] Based upon an annual parallax shift of Template:Val as seen from Earth,[2] it is located approximately 162 light-years from the Sun. This system is drifting further away with a radial velocity of +26 km/s.[7]
This is an A-type main-sequence star with a stellar classification of A4 Vm;[5] the 'm' suffix indicating that abnormal abundances of heavier elements appear in the star's spectrum, making this an Am star. It is 560[10] million years old with a projected rotational velocity of Template:Val.[9] This star has 1.90 the mass of the Sun and 2.5 times the Sun's radius. It is radiating 23 times the Sun's luminosity from its photosphere at an effective temperature of 7,931 K.[8]
A very close companion has been reported using speckle interferometry,[12] but this remains unconfirmed. The separation at discovery in 1986 was Template:Val and it was measured at Template:Val in 1999. It was catalogued by Hipparcos as a problem binary, indicating that the measurements of its position were not consistent with the motion of a single star, and no satisfactory orbit could be found to match the motion.[12]
Name
This star, along with λ Aur and σ Aur, were Kazwini's Al Ḣibāʽ (ألحباع), the Tent.[13] According to the catalogue of stars in the Technical Memorandum 33-507 - A Reduced Star Catalog Containing 537 Named Stars, Al Ḣibāʽ were the title for three stars: λ Aur as Al Ḣibāʽ I, μ Aur as Al Ḣibāʽ II and σ Aur as Al Ḣibāʽ III.[14]
In Chinese, Script error: No such module "Lang". (Script error: No such module "Lang".), meaning Celestial Pier, refers to an asterism consisting of μ Aurigae, 19 Aurigae, φ Aurigae, 14 Aurigae and σ Aurigae.[15] Consequently, μ Aurigae itself is known as Script error: No such module "Lang". (Script error: No such module "Lang"., Template:Langx).[16]
References
External links
- ↑ a b Cite error: Invalid
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<ref>tag; no text was provided for refs namedJohnson1966 - ↑ Cite error: Invalid
<ref>tag; no text was provided for refs namedRoyer2002 - ↑ a b Cite error: Invalid
<ref>tag; no text was provided for refs namedEggleton2008 - ↑ Cite error: Invalid
<ref>tag; no text was provided for refs namedabt1995 - ↑ a b Cite error: Invalid
<ref>tag; no text was provided for refs nameddeBruijne2012 - ↑ a b c d e f Cite error: Invalid
<ref>tag; no text was provided for refs namedStassun_et_al_2019 - ↑ a b c Cite error: Invalid
<ref>tag; no text was provided for refs namedgebran2016 - ↑ a b Cite error: Invalid
<ref>tag; no text was provided for refs namedDeRosa2014 - ↑ Cite error: Invalid
<ref>tag; no text was provided for refs namedSIMBAD - ↑ a b c Cite error: Invalid
<ref>tag; no text was provided for refs namedMason1999 - ↑ Cite error: Invalid
<ref>tag; no text was provided for refs namedAllen1963 - ↑ Cite error: Invalid
<ref>tag; no text was provided for refs namedRhoads1971 - ↑ 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.
- ↑ Template:In lang AEEA (Activities of Exhibition and Education in Astronomy) 天文教育資訊網 2006 年 7 月 13 日 Template:Webarchive