Astronomy:62 Arietis

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Short description: Star in the constellation Aries
62 Arietis
Location of 62 Arietis (circled in red)
Observation data
Equinox J2000.0]] (ICRS)
Constellation Aries
Right ascension  03h 22m 11.89351s[1]
Declination +27° 36′ 27.1911″[1]
Apparent magnitude (V) 5.52[2]
Characteristics
Evolutionary stage horizontal branch[3]
Spectral type G5 III[4]
B−V color index 1.100±0.015[5]
Astrometry
Radial velocity (Rv)7.0±0.3[5] km/s
Proper motion (μ) RA: +5.874[1] mas/yr
Dec.: −14.102[1] mas/yr
Parallax (π)4.7394 ± 0.1128[1] mas
Distance690 ± 20 ly
(211 ± 5 pc)
Absolute magnitude (MV)−1.57[5]
Details[3]
Mass3.74+0.38
−0.21 M☉
Radius35.27+2.81
−3.81 R☉
Luminosity533.48 L☉
Surface gravity (log g)1.92+0.07
−0.08 cgs
Temperature4,665+30
−31 K
Metallicity [Fe/H]−0.17[6] dex
Rotational velocity (v sin i)9.43[6] km/s
Age219+38
−53 Myr
Other designations
62 Ari, BD+27°500, HD 20825, HIP 15696, HR 1012, SAO 75892[7]
Database references
SIMBADdata

62 Arietis is a single[4] star in the northern constellation of Aries, a few degrees to the north of Tau Arietis. 62 Arietis is the Flamsteed designation. It is visible to the naked eye as a dim, yellow-hued star with an apparent visual magnitude of 5.52.[2] Based upon an annual parallax shift of 4.7±0.1 mas,[1] it is approximately 690 light-years (210 parsecs) distant from the Earth.

This object is an aging giant star with a stellar classification of G5 III,[4] most likely (96% chance) on the horizontal branch.[3] Having exhausted the supply of hydrogen at its core, the star has expanded to 35 times the Sun's radius. It is around 219 million years old with 3.7 times the mass of the Sun. The star is radiating 533 times the Sun's luminosity from its enlarged photosphere at an effective temperature of 4,665 K.[3]

Chinese name

In Chinese astronomy, 62 Arietis is called Tiān'ē (天阿), meaning Celestial Concave, because this is the only star in the Celestial Concave asterism, Hairy Head mansion (see: Chinese constellation).[9] Ian Ridpath instead translates this name as "celestial river" and identifies it as HR 999.[10] R. H. Allen's Star Names (1899) rendered this name as Teen Ho, but described it as an asterism of four stars in Aries.[11]

References

  1. ↑ 1.0 1.1 1.2 1.3 1.4 1.5 Brown, A. G. A. (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics 616: A1. doi:10.1051/0004-6361/201833051. Bibcode: 2018A&A...616A...1G.  Gaia DR2 record for this source at VizieR.
  2. ↑ 2.0 2.1 Rybka, E. (1969), "The corrected magnitudes and colours of 278 stars near S.A. 1-139 in the UBV system", Acta Astronomica 19: 229, Bibcode: 1969AcA....19..229R. 
  3. ↑ 3.0 3.1 3.2 3.3 Stock, S. et al. (August 2018), "Precise radial velocities of giant stars. X. Bayesian stellar parameters and evolutionary stages for 372 giant stars from the Lick planet search", Astronomy & Astrophysics 616: 15, doi:10.1051/0004-6361/201833111, A33, Bibcode: 2018A&A...616A..33S. 
  4. ↑ 4.0 4.1 4.2 Eggleton, P. P.; Tokovinin, A. A. (September 2008), "A catalogue of multiplicity among bright stellar systems", Monthly Notices of the Royal Astronomical Society 389 (2): 869–879, doi:10.1111/j.1365-2966.2008.13596.x, Bibcode: 2008MNRAS.389..869E. 
  5. ↑ 5.0 5.1 5.2 Anderson, E.; Francis, Ch. (2012), "XHIP: An extended hipparcos compilation", Astronomy Letters 38 (5): 331, doi:10.1134/S1063773712050015, Bibcode: 2012AstL...38..331A. 
  6. ↑ 6.0 6.1 Hekker, S.; Meléndez, J. (2007), "Precise radial velocities of giant stars. III. Spectroscopic stellar parameters", Astronomy and Astrophysics 475 (3): 1003, doi:10.1051/0004-6361:20078233, Bibcode: 2007A&A...475.1003H. 
  7. ↑ "62 Ari". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=62+Ari. 
  8. ↑ Yi, Shitong (April 1981) (in zh). 科学出版社. 
  9. ↑ Stellarium, citing Yi Shitong (1981)[8]
  10. ↑ Ridpath, Ian. "Star Tales – Aries". http://ianridpath.com/startales/aries.html. 
  11. ↑ Richard Hinckley Allen: Star Names — Their Lore and Meaning: Aries



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