Phi<sup>2</sup> Hydrae, Latinized from ÃÂ<sup>2</sup> Hydrae, is a star in the constellation Hydra. It originally received the Flamsteed designation of 1 Crateris before being placed in the Hydra constellation. Based upon an annual parallax shift of as seen from Earth, it is located roughly 1,110 light years from the Sun. The star is faintly visible to the naked eye with an apparent visual magnitude of about 6.1. It forms a triangle with the fainter ÃÂ<sup>1</sup> Hydrae and the brighter ÃÂ<sup>3</sup> Hydrae, between ü Hydrae and ý Hydrae.
This is an evolved red giant star with a stellar classification of M1 III. It is currently on the asymptotic giant branch, and is a semiregular variable that undergoes changes in luminosity according to three pulsation periods, although it is formally still only a suspected variable. The star is radiating an estimated 1,470 times the Sun's luminosity from its photosphere at an effective temperature of .
Phi<sup>2</sup> Hydrae has a faint visual companion: a magnitude 12.20 star at an angular separation of 3.50 arc seconds along a position angle of 280ð, as of 1959. The companion has a similar Gaia Data Release 3 parallax to Phi<sup>2</sup> Hydrae and is at a distance of .