31 Lyncis
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Lynx |
| Right ascension | 08h 22m 50.13s[1] |
| Declination | +43° 11′ 18.1″[1] |
| Apparent magnitude (V) | +4.25[2] |
| Characteristics | |
| Astrometry | |
| Radial velocity (Rv) | 24.56 ± 0.22 km/s |
| Proper motion (μ) | RA: –25.16 ± 0.36[1] mas/yr Dec.: –99.23 ± 0.21[1] mas/yr |
| Parallax (π) | 8.53 ± 0.25[1] mas |
| Distance | 380 ± 10 ly (117 ± 3 pc) |
| Details | |
| Surface gravity (log g) | 1.46 ± 0.12[3] cgs |
| Temperature | 3921 ± 19[3] K |
| Metallicity [Fe/H] | -0.06 ± 0.05[3] dex |
| Other designations | |
31 Lyncis, or Alsciaukat, is the fourth-brightest star in the constellation Lynx. It is an orange giant star located about 390 light years from Earth. Its apparent magnitude is +4.25 and it belongs to the spectral class K4.5III-IIIb.
A 1993 study found that it varied in brightness by 0.05 magnitude over 25 to 30 days.[4]
Analysis of HIPPARCOS data showed that it was slightly variable by 0.0055 magnitude.[5]
Names
This star has the traditional names Alsciaukat, from Arabic الشوكة aš-šawkat "the thorn", and Mabsuthat, from Arabic المبسوطة al-mabsūtah "the outstretched (paw)".
References
- 1 2 3 4 5 van Leeuwen, F. (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. - ↑ Ducati, J. R. (2002). "VizieR Online Data Catalog: Catalogue of Stellar Photometry in Johnson's 11-color system". CDS/ADC Collection of Electronic Catalogues. 2237. Bibcode:2002yCat.2237....0D.
- 1 2 3 Sharma, Kaushal; Prugniel, Philippe; Singh, Harinder P. (2016). "New atmospheric parameters and spectral interpolator for the MILES cool stars". Astronomy & Astrophysics. 585: 27. arXiv:1512.04882. Bibcode:2016A&A...585A..64S. doi:10.1051/0004-6361/201526111. A64.
- ↑ Percy, John R. (1993). "The photometric variability of K giants". Publications of the Astronomical Society of the Pacific. 105 (694): 1422–26. Bibcode:1993PASP..105.1422P. doi:10.1086/133324.
- ↑ Koen, Chris; Eyer, Laurent (2002). "New periodic variables from the Hipparcos epoch photometry". Monthly Notices of the Royal Astronomical Society. 331: 45. arXiv:astro-ph/0112194. Bibcode:2002MNRAS.331...45K. doi:10.1046/j.1365-8711.2002.05150.x.
- Richard Hinckley Allen, Star Names, Their Lore and Legend, New York City, Dover.
- "HD 70272 -- Variable Star". SIMBAD Astronomical Database. Retrieved 2007-01-31.
External links
This article is issued from Wikipedia - version of the 10/9/2016. The text is available under the Creative Commons Attribution/Share Alike but additional terms may apply for the media files.