Sigma Aurigae

Source: Wikipedia, the free encyclopedia.
σ Aurigae
Location of σ Aurigae (circled)
Observation data
Epoch J2000      Equinox J2000
Constellation Auriga
Right ascension 05h 24m 39.14142s[1]
Declination +37° 23′ 07.2589″[1]
Apparent magnitude (V) 4.99[2]
Characteristics
Spectral type K4 III[3]
U−B color index +1.75[2]
B−V color index +1.42[2]
Distance
530 ± 20 ly
(161 ± 6 pc)
Absolute magnitude (MV)−0.75[6]
Details
Rotational velocity (v sin i)
10[8] km/s
HR 1773, SAO 57981[9]
Database references
SIMBADdata

Sigma Aurigae,

mas,[5] it is approximately 530 light-years (160 parsecs) distant from the Earth. This is an evolved giant star with a stellar classification of K4 III.[3]

Sigma Aurigae has a 12th magnitude companion at an

arcseconds, as well as two fainter companions at 28 and 35" respectively.[10]
All are background objects, stars much further away than Sigma itself.

Sigma Aurigae, along with λ Aur and μ Aur, were Kazwini's Al Ḣibāʽ (ألحباع), the Tent.[11] 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.[12]

References

  1. ^
    doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR
    .
  2. ^
    doi:10.1093/mnras/133.4.475
    .
  3. ^
    doi:10.1086/145598
    .
  4. S2CID 17804304
    .
  5. ^
    S2CID 18759600. Note: see VizieR catalogue I/311
    .
  6. S2CID 119257644
    .
  7. ^
    doi:10.1086/191527
    .
  8. Bibcode:1970CoAsi.239....1B
    .
  9. ^ "sig Aur -- Star in double system", SIMBAD Astronomical Database, Centre de Données astronomiques de Strasbourg, retrieved 2012-08-22.
  10. doi:10.1086/323920
    .
  11. ISBN 0-486-21079-0
    . Retrieved 2010-12-12.
  12. ^ Rhoads, Jack W. (November 15, 1971), Technical Memorandum 33-507-A Reduced Star Catalog Containing 537 Named Stars (PDF), California Institute of Technology: Jet Propulsion Laboratory, retrieved 2012-08-19.

External links

Retrieved from "https://en.wikipedia.org/w/index.php?title=Sigma_Aurigae&oldid=1169989887"