56 Arietis
| Observation data Epoch J2000 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Aries |
| Right ascension | 03h 12m 14.24670s[1] |
| Declination | +27° 15′ 25.0847″[1] |
| Apparent magnitude (V) | 5.79[2] |
| Characteristics | |
| Spectral type | B9pSi[3] |
| U−B color index | –0.42[2] |
| B−V color index | –0.12[2] |
| Variable type | SX Ari |
| Astrometry | |
| Radial velocity (Rv) | +18.0[4] km/s |
| Proper motion (μ) | RA: +12.39[1] mas/yr Dec.: –18.57[1] mas/yr |
| Parallax (π) | 6.49 ± 0.76[1] mas |
| Distance | approx. 500 ly (approx. 150 pc) |
| Absolute magnitude (MV) | +0.25[5] |
| Details | |
| Mass | 3.16 ± 0.17[5] M☉ |
| Radius | 2.3 ± 0.3[5] R☉ |
| Luminosity | 110[5] L☉ |
| Surface gravity (log g) | 4.36 ± 0.12[5] cgs |
| Temperature | 12,445[5] K |
| Rotation | 0.7278972 days[5] |
| Other designations | |
56 Arietis (abbreviated 56 Ari) is a star in the northern constellation of Aries. 56 Arietis is the Flamsteed designation. It is faintly visible to the naked eye with an apparent visual magnitude is 5.79.[2] The estimated distance to this star is approximately 500 light-years (150 parsecs). This is a magnetic, chemically peculiar star of the silicon type and it has a rapid rotation period of 17.5 hours.[7]
References
- 1 2 3 4 5 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 Nicolet, B. (1978), "Photoelectric photometric Catalogue of homogeneous measurements in the UBV System", Astronomy and Astrophysics Supplement Series, 34: 1–49, Bibcode:1978A&AS...34....1N.
- ↑ Cowley, A.; et al. (April 1969), "A study of the bright A stars. I. A catalogue of spectral classifications", Astronomical Journal, 74: 375–406, Bibcode:1969AJ.....74..375C, doi:10.1086/110819.
- ↑ Bonsack, Walter K. (February 1958), "Wavelength Variations in the Spectrum of 56 ARIETIS", Publications of the Astronomical Society of the Pacific, 70 (412): 90, Bibcode:1958PASP...70...90B, doi:10.1086/127180.
- 1 2 3 4 5 6 7 North, P. (June 1998), "Do SI stars undergo any rotational braking?", Astronomy and Astrophysics, 334: 181–187, arXiv:astro-ph/9802286, Bibcode:1998A&A...334..181N.
- ↑ "SX Ari -- Variable Star of alpha2 CVn type", SIMBAD Astronomical Database, Centre de Données astronomiques de Strasbourg, retrieved 2012-07-18.
- ↑ Ziznovsky, J.; Schwartz, P.; Zverko, J. (January 2000), "The Variable Light Curve of 56 Arietis", Information Bulletin on Variable Stars, 4835: 1, Bibcode:2000IBVS.4835....1Z.
External links
This article is issued from Wikipedia - version of the 8/28/2016. The text is available under the Creative Commons Attribution/Share Alike but additional terms may apply for the media files.