1 Lyncis

1 Lyncis
Observation data
Epoch J2000      Equinox J2000
Constellation Lynx
Right ascension 06h 17m 54.81907s[1]
Declination +61° 30′ 55.0251″[1]
Apparent magnitude (V) 4.95[2]
Characteristics
Spectral type M3IIIab[3]
U−B color index +1.96[2]
B−V color index +1.83[2]
Variable type Lb
Astrometry
Radial velocity (Rv)11.56±0.44[4] km/s
Proper motion (μ) RA: –10.59 ± 0.36[1] mas/yr
Dec.: -3.11 ± 0.29[1] mas/yr
Parallax (π)5.11 ± 0.33[1] mas
Distance640 ± 40 ly
(200 ± 10 pc)
Details
Luminosity2,848[5] L☉
Temperature3,485[5] K
Other designations
1 Lyncis, UW Lyncis, BD +61 869, FK5 2479, HD 42973, HR 2215, HIP 29919, SAO 13787.[6]
Database references
SIMBADdata

1 Lyncis, also known by its variable star designation of UW Lyncis, is a star in the constellation Lynx. It is a red giant of spectral type M3III. It has been classified as a slow irregular variable,[7] after being found to be slightly variable in 1969 by Olin J. Eggen.[8] Its changes in brightness are complex, with two shorter changeable periods of 35–40 and 47–50 days due to the star's pulsations, and a longer period of 1500 days possibly due to the star's rotation or convectively induced oscillatory thermal (COT) mode.[9]

References

  1. 1 2 3 4 5 van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics. 474 (2): 653–664. Bibcode:2007A&A...474..653V. arXiv:0708.1752 Freely accessible. doi:10.1051/0004-6361:20078357.
  2. 1 2 3 Mermilliod, J.-C. (1986). "Compilation of Eggen's UBV data, transformed to UBV (unpublished)". Catalogue of Eggen's UBV data. SIMBAD. Bibcode:1986EgUBV........0M.
  3. ↑ Eggleton, P. P.; Tokovinin, A. A. (2008). "A catalogue of multiplicity among bright stellar systems". Monthly Notices of the Royal Astronomical Society. 389 (2): 869. Bibcode:2008MNRAS.389..869E. arXiv:0806.2878 Freely accessible. doi:10.1111/j.1365-2966.2008.13596.x.
  4. ↑ Famaey, B.; et al. (2005). "Local kinematics of K and M giants from CORAVEL/Hipparcos/Tycho-2 data. Revisiting the concept of superclusters". Astronomy and Astrophysics. 430: 165–186. Bibcode:2005A&A...430..165F. arXiv:astro-ph/0409579 Freely accessible. doi:10.1051/0004-6361:20041272.
  5. 1 2 McDonald, I.; et al. (2012). "Fundamental Parameters and Infrared Excesses of Hipparcos Stars". Monthly Notices of the Royal Astronomical Society. 427 (1): 343–57. Bibcode:2012MNRAS.427..343M. arXiv:1208.2037 Freely accessible. doi:10.1111/j.1365-2966.2012.21873.x.
  6. ↑ "1 Lyncis". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 9 March 2016.
  7. ↑ Watson, Christopher (4 January 2010). "UW Lyncis". AAVSO Website. American Association of Variable Star Observers. Retrieved 10 March 2016.
  8. ↑ Eggen, Olin J. (1969). "Light Variations of Small Amplitude in the Red Giants of the Disc Population". Information Bulletin on Variable Stars (355, #1. (IBVS Homepage)). Bibcode:1969IBVS..355....1E.
  9. ↑ Percy, John R.; Wilson, Joseph B.; Henry, Gregory W. (2001). "Long-Term VRI Photometry of Small-Amplitude Red Variables. I. Light Curves and Periods". The Publications of the Astronomical Society of the Pacific. 113 (786): 983–96. Bibcode:2001PASP..113..983P. doi:10.1086/322153.


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