1 Lyncis is a single[5] star in the northern
constellation of
Lynx. It is also known by its variable star designation of UW Lyncis; 1 Lyncis is the
Flamsteed designation. This object is visible to the naked eye as a faint, reddish-hued star with an
apparent visual magnitude of 4.95.[3] It is moving further from the Earth with a heliocentric
radial velocity of 12 km/s.[7]
The star is an aging
red giant of spectral type M3IIIab,[5] currently on the
asymptotic giant branch,[4] having exhausted the hydrogen at its
core and
evolved away from the
main sequence. It has been classified as a possible
slow irregular variable,[6] after being found to be slightly variable in 1969 by
Olin J. Eggen.[12] 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 1,500 days possibly due to the star's rotation or convectively induced oscillatory thermal (COT) mode.[13] The star has expanded to 156[9] times the
Sun's radius and it is radiating 2,848[10] times the
luminosity of the Sun from its enlarged
photosphere at an
effective temperature of 3,485 K.[10]
References
^"/ftp/cats/more/HIP/cdroms/cats". Centre de Données astronomiques de Strasbourg. Strasbourg astronomical Data Center. Retrieved 15 October 2022.
^Eggen, Olin J. (1969). "Light Variations of Small Amplitude in the Red Giants of the Disc Population". Information Bulletin on Variable Stars. 355 (355, #1. (IBVS Homepage)): 1.
Bibcode:
1969IBVS..355....1E.