GL Virginis

GL Virginis, also known as G 12-30, is a star in the constellation of Virgo. It is a faint red dwarf, like more than 70% of the stars located within 10 parsecs of the Solar System; its magnitude visual magnitude is 13.898, making it impossible to see with the naked eye.
In 1977, Glen J. Veeder and Olav L. Hansen announced that the star, then called GL 12-30, is a variable star. It was given its variable star designation, GL Virginis, in 1981.
Located 21.1 light years away, GL Virginis has a spectral type of M4.5V and an effective temperature of approximately 3110 K. Its luminosity is only one ten-thousandth compared to the Sun; however, since a significant fraction of its radiation is emitted as invisible infrared light, its bolometric luminosity increases to 0.5% of that of the Sun. Its mass is 12% that of the Sun and its radius is 16% of the Sun. It is a fairly rapid rotator: its rotational velocity is least 17 km/s, which implies that it takes less than half a day to complete a rotation on its axis. The star is emitting frequent flares, with at least five detected by 2019.
The closest known star system to GL Virginis is Gliese 486, 6.4 light-years away.