ET Virginis is a single, red-hued star in the equatorial constellation of Virgo. It can be viewed with the naked eye, having an apparent visual magnitude of about five. Based upon an annual parallax shift of 5.9 mas, it is located 560 light years away. It is moving further from the Earth with a heliocentric radial velocity of +18.6 km/s, having come within 177 ly of the Sun around 6.3 million years ago.

This is an evolved red giant star with a stellar classification of M2 IIIa. It is a semiregular variable star of subtype SRB with a magnitude that ranges from a high of 4.80 down to 5.00. The measured angular diameter of this star, after correcting for limb darkening, is 4.79±0.34 mas. At its estimated distance, this yields a physical size of 83 times the radius of the Sun.

In 1971, N. R. Stokes announced that the star, then called HD 123934, is a "quasi-periodic" variable star. It received its variable star designation, ET Virginis, in 1972.

This star was part of the obsolete constellation Noctua, the owl.