62 Arietis
Star in the constellation Aries
From Wikipedia, the free encyclopedia
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.
 | |
| Observation data Epoch J2000 Equinox 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 mas[1] |
| Distance | 690 ± 20 ly (211 ± 5 pc) |
| Absolute magnitude (MV) | −1.57[5] |
| Details[3] | |
| 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,[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]