HW Virginis, abbreviated HW Vir, is an eclipsing binary system (of the Algol type), approximately 563 light-years away based on the parallax measured by the Gaia spacecraft,[1] in the constellation of Virgo.

[8] The proposed system was later shown to be extremely unstable, with mean lifetimes less than 1000 years in the parameter space allowed by the uncertainties in the data.

[9] The problems with modelling this system and the proposed planets orbiting several other post-common envelope binaries has led to the suggestion that the eclipse timing variations used to infer the existence of planets has a non-planetary origin.

[11] The eclipse timing variations of HW Virginis were shown to be incompatible with all previous planetary system models as of 2018,[12] and again in 2021.

[4] There is tentative evidence for the presence of a planet from astrometric measurements,[13] with future data releases of the Gaia spacecraft[1] being predicted to be able to fully confirm this.