Eta1 Hydri, Latinized from η1 Hydri, is a blue-white hued star in the southern constellation of Hydrus. It has an apparent visual magnitude of 6.76, which may be too faint to be visible to the naked eye. Based upon an annual parallax shift of 5.27 mas as measured from Earth, the system is located about 619 light years distant from the Sun. At that distance, the visual magnitude of the star is diminished by 0.10 magnitudes of extinction due to interstellar dust. The star is drifting further away with a heliocentric radial velocity of +15 km/s.