STF 422 (V711 Tauri) is a triple system in the constellation Taurus, located 100 light-years from the Sun. The primary component A, is a spectroscopic binary consisting of a subgiant of spectral class K1IV with a mass of 1 solar mass and a diameter of 3.7 solar diameters (Aa) and a G5V main-sequence star with a mass of 0.8 solar masses and a diameter of 1.1 solar diameters (Ab). Aa and Ab orbit extremely close to each other with a period of 2.84 days, causing their elliptical deformation. Component A is also a variable star known as V711 Tauri. The secondary component B, is a K3V main-sequence star with a mass of 0.78 solar masses and a diameter of 0.78 solar diameters. The orbital period of components A and B is estimated to be 1210 years.

100mm STF 422 is located on the southwest edge of the Taurus constellation, approximately 10 arcminutes north of the star 10 Tauri (4.25 Mag). It is a suitable object for observation with small telescopes. Components were resolved at 100x magnification, but even lower magnification would suffice. The components exhibit contrasting colors; I observed the primary component as yellowish and the companion as orange.