62 Arietis

62 Arietis is a single[3] 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.

62 Arietis

Observation data Epoch J2000      Equinox J2000
Constellation	Aries
Right ascension	03^h 22^m 11.89351^s[1]
Declination	+27° 36′ 27.1911″[1]
Apparent magnitude (V)	5.52[2]
Characteristics
Evolutionary stage	horizontal branch
Spectral type	G5 III[3]
B−V color index	1.100±0.015[4]
Astrometry
Radial velocity (Rv)	7.0±0.3[4] 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
Distance	690 ± 20 ly (211 ± 5 pc)
Absolute magnitude (MV)	−1.57[4]
Details[5]
Mass	3.74+0.38 −0.21 M☉
Radius	35.27+2.81 −3.81 R☉
Luminosity	533.48 L☉
Surface gravity (log g)	1.92+0.07 −0.08 cgs
Temperature	4,665+30 −31 K
Metallicity [Fe/H]	−0.17[6] dex
Rotational velocity (v sin i)	9.43[6] km/s
Age	219+38 −53 Myr
Other designations
62 Ari, BD+27°500, HD 20825, HIP 15696, HR 1012, SAO 75892[7]
Database references
SIMBAD	data

This object is an aging giant star with a stellar classification of G5 III,[3] most likely (96% chance) on the horizontal branch.[5] 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.[5]

Chinese name

In Chinese astronomy, 62 Arietis is called 天阿, Pinyin: Tiānhé, meaning Celestial River, because this star is marking itself and stand alone in Celestial River asterism, Hairy Head mansion (see : Chinese constellation).[8] 天阿 (Tiānhé) is westernized into Teen Ho, but according to another opinion about this asterism, Teen Ho is asterism consisting four stars in Aries.[9]

Another "Tiānhé" (Celestial River) in Tail mansion, is asterism consisting the stars in Ophiuchus[10]

References

1. Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
2. 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. 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, arXiv:0806.2878, Bibcode:2008MNRAS.389..869E, doi:10.1111/j.1365-2966.2008.13596.x.
4. Anderson, E.; Francis, Ch. (2012), "XHIP: An extended hipparcos compilation", Astronomy Letters, 38 (5): 331, arXiv:1108.4971, Bibcode:2012AstL...38..331A, doi:10.1134/S1063773712050015.
5. 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, arXiv:1805.04094, Bibcode:2018A&A...616A..33S, doi:10.1051/0004-6361/201833111, A33.
6. Hekker, S.; Meléndez, J. (2007), "Precise radial velocities of giant stars. III. Spectroscopic stellar parameters", Astronomy and Astrophysics, 475 (3): 1003, arXiv:0709.1145, Bibcode:2007A&A...475.1003H, doi:10.1051/0004-6361:20078233.
7. "62 Ari". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2019-06-03.
8. zh:白羊座
9. Richard Hinckley Allen: Star Names — Their Lore and Meaning: Aries
10. zh:蛇夫座

External links

• Aladin previewer
• Aladin sky atlas
• HR 1012