Y Lyncis
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Lynx |
| Right ascension | 07h 28m 11.61802s[1] |
| Declination | +45° 59′ 26.2366″[1] |
| Apparent magnitude (V) | 6.98 |
| Characteristics | |
| Spectral type | S |
| Variable type | Semiregular variable |
| Astrometry | |
| Radial velocity (Rv) | 5.50 ± 0.6 km/s |
| Proper motion (μ) | RA: 0.23 ± 1.17[1] mas/yr Dec.: -3.41 ± 0.60[1] mas/yr |
| Parallax (π) | 3.95 ± 0.95[1] mas |
| Distance | approx. 800 ly (approx. 250 pc) |
| Details | |
| Other designations | |
Y Lyncis is a star in the constellation Lynx. It is a red giant of spectral type S. It has been classified as a semiregular variable.[3] A popular star with amateur astronomers, it ranges in brightness from magnitude 6.2 to 8.9.[4] Its changes in brightness are complex, with a shorter period of 110 days due to the star's pulsations, and a longer period of 1400 days possibly due to the star's rotation or convectively induced oscillatory thermal (COT) mode.[5] It has an estimated diameter around 580 times that of the Sun, is around 1.5 to 2 times as massive, and has a luminosity around 25,000 times that of the Sun.[4]
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.
- ↑ "Y Lyncis". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 9 March 2016.
- ↑ Otero, Sebastian Alberto (15 August 2011). "Y Lyncis". AAVSO Website. American Association of Variable Star Observers. Retrieved 10 March 2016.
- 1 2 Szatmary, Karoly; Vinko, Jozsef (1992). "Periodicities of the light curve of the semiregular variable star Y Lyncis". Monthly Notices of the Royal Astronomical Society 256 (2): 321–28. Bibcode:1992MNRAS.256..321S. doi:10.1093/mnras/256.2.321.
- ↑ 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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