64 Arietis
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Aries |
| Right ascension | 03h 24m 18.4749s[1] |
| Declination | +24° 43′ 26.626″[1] |
| Apparent magnitude (V) | +5.67[2] |
| Characteristics | |
| Spectral type | K4 III[2] |
| B−V color index | 1.19 |
| Astrometry | |
| Radial velocity (Rv) | +8.49 ± 0.09[3] km/s |
| Proper motion (μ) | RA: +15.22[1] mas/yr Dec.: –52.36[1] mas/yr |
| Parallax (π) | 15.68 ± 0.32[1] mas |
| Distance | 208 ± 4 ly (64 ± 1 pc) |
| Details | |
| Radius | 11[3] R☉ |
| Luminosity | 42[3] L☉ |
| Surface gravity (log g) | 2.5[3] cgs |
| Temperature | 4,426[3] K |
| Rotational velocity (v sin i) | 1.4[3] km/s |
| Other designations | |
64 Arietis (abbreviated 64 Ari) is a binary star[2] in the northern constellation of Aries. 64 Arietis is the Flamsteed designation. It is faintly visible to the naked eye with an apparent visual magnitude of +5.67.[2] This is a giant star with a stellar classification of K4 III.[2] It has 11 times the radius of the Sun and shines with 42 times the Sun's luminosity.[3] This energy is being radiated from the outer envelope at an effective temperature of 4,426 K,[3] giving it the orange-hued glow of a K-type star. Based upon an annual parallax shift of 15.68 mas,[1] this star is approximately 208 light-years (64 parsecs) distant from Earth.
References
- 1 2 3 4 5 6 van Leeuwen, F. (November 2007), "Validation of the new Hipparcos reduction", Astronomy and Astrophysics 474 (2): 653–664, arXiv:0708.1752, Bibcode:2007A&A...474..653V, doi:10.1051/0004-6361:20078357.
- 1 2 3 4 5 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.
- 1 2 3 4 5 6 7 8 Massarotti, Alessandro; et al. (January 2008), "Rotational and Radial Velocities for a Sample of 761 HIPPARCOS Giants and the Role of Binarity", The Astronomical Journal 135 (1): 209–231, Bibcode:2008AJ....135..209M, doi:10.1088/0004-6256/135/1/209.
- ↑ "sig Ari -- Star", SIMBAD Astronomical Database (Centre de Données astronomiques de Strasbourg), retrieved 2012-07-18.
External links
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