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 51.12 pc around 8.5 million years from now.

This is a magnetic chemically-peculiar star with a stellar classification of B8 IIIp Si Sr, showing abundance anomalies in silicon and strontium. The light variations of this star were discovered by J. E. Winzer in 1974. It is an Alpha2 Canum Venaticorum-type variable with a period of 1.160898 days (or 7.0980 days ), ranging in magnitude from a high of 5.91 down to 5.98. The surface magnetic field has a strength of $−0.062$

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 10 pc from the Sun.