19 Lyrae
19 Lyrae is a single variable star located approximately 950 light years away from the Sun in the northern constellation of Lyra. It has the variable star designation V471 Lyr, while "19 Lyrae" is the Flamsteed designation. This object is just bright enough to be visible to the naked eye, appearing as a dim, blue-white star with a baseline apparent visual magnitude of 5.93. It is moving closer to the Earth with a heliocentric radial velocity of −30 km/s, and may come as close as around 8.5 million years from now. This is a magnetic chemically -peculiar star with a stellar classification of , showing abundance anomalies in silicon and strontium. The light variations of this star were discovered by J. E. Winzer in 1974. It is an Alpha Canum Venaticorum-type variable with a period of 1.160898 days, ranging in magnitude from a high of 5.91 down to 5.98. The surface magnetic field has a strength of 19 Lyrae has a moderate rotation rate, showing a projected rotational velocity of 35 km/s. Stellar models give it an estimated 3.8 times the mass of the Sun and its girth is measured at 6.4 times the Sun 's radius. It is radiating 397 times the luminosity of the Sun from its photosphere at an effective temperature of around 11,194 K. The star has an absolute magnitude of −1.24, which shows how bright the star would appear if it were located at a distance of from the Sun.