| 词条 | Sigma Aurigae |
| 释义 |
| name = σ Aurigae }}{{Starbox image | image={{Location mark |image=Auriga constellation map.svg|alt=|float=center|width=260 |label=|position=right |mark=Red circle.svg|mark_width=10|mark_link=σ Aurigae |x=558|y=516 }} |caption=Location of σ Aurigae (circled) }}{{Starbox observe | epoch = J2000 | ra = {{RA|05|24|39.14261}}[1] | dec = {{DEC|+37|23|07.2494}}[1] | appmag_v = 4.99[3] | constell = Auriga }}{{Starbox character | class = K4 III[4] | r-i = 0.53 | v-r = | b-v = +1.42[3] | u-b = +1.75[3] | variable = }}{{Starbox astrometry | radial_v = –19.7[7] | prop_mo_ra = +0.71[1] | prop_mo_dec = –11.51[1] | parallax = 6.2101 | p_error = 0.2221 | parallax_footnote = [10] | absmag_v = −0.75[11] }}{{Starbox detail | mass = | radius = | luminosity = 431[11] | temperature = 4,080[13] | metal_fe = –0.03[13] | gravity = 1.75[13] | rotational_velocity = 10[16] | age_gyr = }}{{Starbox catalog | names = σ Aur, 21 Aurigae, BD+37°1175, HD 35186, HIP 25292, HR 1773, SAO 57981.[17] }}{{Starbox reference |Simbad=sig+Aur }}{{Starbox end}}Sigma Aurigae, Latinized from σ Aurigae, is a giant star in the northern constellation of Auriga. It is faintly visible to the naked eye with an apparent visual magnitude of 4.99.[3] With an annual parallax shift of 6.21 mas,[1] it is approximately {{Convert|530|ly|pc|abbr=off|lk=on}} distant from the Earth. This is an evolved giant star with a stellar classification of K4 III.[4] Sigma Aurigae has a 12th magnitude companion at an angular separation of 8 arcseconds, as well as two fainter companions at 28 and 35" respectively. All are background objects, stars much further away than Sigma itself. References1. ^1 2 3 4 5 {{citation | first1=Floor | last1=van Leeuwen |date=November 2007 | title=Validation of the new Hipparcos reduction | volume=474 | issue=2 | pages=653–664 | bibcode=2007A&A...474..653V | arxiv=0708.1752v1 | doi=10.1051/0004-6361:20078357 | journal=Astronomy and Astrophysics | postscript=. }} Note: see VizieR catalogue I/311. [1][2][3][4][5][6][7][8][9]2. ^1 2 {{citation | title=XHIP: An extended hipparcos compilation | last1=Anderson | first1=E. | last2=Francis | first2=Ch. | journal=Astronomy Letters | volume=38 | issue=5 | pages=331 | year=2012 | bibcode=2012AstL...38..331A | doi=10.1134/S1063773712050015 | arxiv=1108.4971 | postscript=. }} 3. ^1 2 3 {{citation | last=McWilliam | first=Andrew | title=High-resolution spectroscopic survey of 671 GK giants. I - Stellar atmosphere parameters and abundances | journal=Astrophysical Journal Supplement Series | volume=74 | pages=1075–1128 |date=December 1990 | doi=10.1086/191527 | bibcode=1990ApJS...74.1075M | postscript=. }} 4. ^1 2 {{citation | title=The Spectra of the Bright Stars of Types F5-K5 | last=Roman | first=Nancy G. | journal=Astrophysical Journal | volume=116 | page=122 |date=July 1952 | doi=10.1086/145598 | bibcode=1952ApJ...116..122R | postscript=. }} 5. ^1 {{citation | display-authors=1 | last1=Famaey | first1=B. | last2=Jorissen | first2=A. | last3=Luri | first3=X. | last4=Mayor | first4=M. | last5=Udry | first5=S. | last6=Dejonghe | first6=H. | last7=Turon | first7=C. | title=Local kinematics of K and M giants from CORAVEL/Hipparcos/Tycho-2 data. Revisiting the concept of superclusters | journal=Astronomy and Astrophysics | volume=430 | issue=1 | pages=165–186 |date=January 2005 | doi=10.1051/0004-6361:20041272 | bibcode=2005A&A...430..165F | arxiv=astro-ph/0409579 | postscript=. }} 6. ^1 2 3 4 {{citation | last=Argue | first=A. N. | title=UBV photometry of 550 F, G and K type stars | journal=Monthly Notices of the Royal Astronomical Society | year=1966 | volume=133 | issue=4 | pages=475–493 | bibcode=1966MNRAS.133..475A | postscript=. | doi=10.1093/mnras/133.4.475}} 7. ^1 {{citation | last1=Bernacca | first1=P. L. | last2=Perinotto | first2=M. | title=A catalogue of stellar rotational velocities | journal=Contributi Osservatorio Astronomico di Padova in Asiago | volume=239 | issue=1 | pages=1 | year=1970 | bibcode=1970CoAsi.239....1B | postscript=. }} 8. ^1 {{citation | title=sig Aur -- Star in double system | work=SIMBAD Astronomical Database | publisher=Centre de Données astronomiques de Strasbourg | url=http://simbad.u-strasbg.fr/simbad/sim-id?Ident=Sigma+Aurigae | accessdate=2012-08-22 | postscript=. }} 9. ^1 {{cite DR2|184433149893809024}} }} External links
9 : Henry Draper Catalogue objects|Double stars|Hipparcos objects|Bayer objects|Auriga (constellation)|K-type giants|Flamsteed objects|HR objects|Durchmusterung objects |
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