36 Arietis
| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Aries |
| Right ascension | 02h 44m 19.11291s[1] |
| Declination | 17° 45′ 50.1344″[1] |
| Apparent magnitude (V) | 6.40[2] |
| Characteristics | |
| Evolutionary stage | giant |
| Spectral type | K2 III[3] |
| B−V color index | 1.143±0.008[2] |
| Astrometry | |
| Radial velocity (Rv) | −34.29±0.29[2] km/s |
| Proper motion (μ) | RA: 36.786[1] mas/yr Dec.: −36.103[1] mas/yr |
| Parallax (π) | 8.8631 ± 0.0377 mas[1] |
| Distance | 380 ± 2 ly (116.4 ± 0.5 pc) |
| Absolute magnitude (MV) | 1.45±0.11[4] |
| Details[4] | |
| Mass | 1.06±0.30 M☉ |
| Radius | 9.82 0.13 −0.47[1] R☉ |
| Luminosity | 44.16±0.29[1] L☉ |
| Surface gravity (log g) | 2.59±0.11 cgs |
| Temperature | 4,749±92 K |
| Metallicity [Fe/H] | 0.24 dex |
| Age | 1.95 0.68 −0.50 Gyr |
| Other designations | |
| Database references | |
| SIMBAD | data |
36 Arietis is a star in the northern constellation of Aries. 36 Arietis is the Flamsteed designation. It is a dim, orange-hued star that is a challenge to view with the naked eye, having an apparent visual magnitude of 6.40.[2] Based upon an annual parallax shift of 8.59±0.04 mas, this star is located 380 light-years (120 parsecs) away from the Sun. It is moving closer to the Earth with a heliocentric radial velocity of −34 km/s,[2] and is a member of the Wolf 630 moving group of stars that share a common motion through space.[6]
This object is an evolved giant star with a stellar classification of K2 III.[3] It is around two million years old with a similar mass as the Sun.[4] With the hydrogen at its core exhausted, the star has expanded to ten[1] times the girth of the Sun. It has a higher than solar metallicity, showing a high abundance of iron in its spectrum. The star is radiating 44[1] times the Sun's luminosity from its enlarged photosphere at an effective temperature of 4,749 K.[4]
References
[edit]- ^ a b c d e f g h i 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.
- ^ a b c d e 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, S2CID 119257644.
- ^ a b Adams, Walter S.; et al. (1935), "The Spectroscopic Absolute Magnitudes and Parallaxes of 4179 Stars", Astrophysical Journal, 81: 187, Bibcode:1935ApJ....81..187A, doi:10.1086/143628.
- ^ a b c d Feuillet, Diane K.; et al. (2016), "Determining Ages of APOGEE Giants with Known Distances", The Astrophysical Journal, 817 (1): 40, arXiv:1511.04088, Bibcode:2016ApJ...817...40F, doi:10.3847/0004-637X/817/1/40, S2CID 118675933.
- ^ "36 Ari". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2019-06-03.
- ^ McDonald, A. R. E.; Hearnshaw, J. B. (August 1983), "The Wolf 630 moving group of stars", Monthly Notices of the Royal Astronomical Society, 204 (3): 841–852, Bibcode:1983MNRAS.204..841M, doi:10.1093/mnras/204.3.841.
