Maia /ˈmeɪə/, designated 20 Tauri (abbreviated 20 Tau), is a star in the constellation of Taurus.

Maia is one of the seven daughters of Atlas and Pleione in Greek mythology—stars which are also included in the Pleiades star cluster.

The 2007 new Hipparcos reduction gives a statistically more accurate parallax of 8.51±0.28 mas, indicating a distance of 118±4 pc.

[8] Interferometric measurements give an angular diameter of 0.436±0.023 mas, suggesting a radius of 4.95 R☉ assuming a distance of 113.5 pc.

These measurements also allow the effective temperature to be estimated at 14,700±900 K.[9] Maia is a chemically peculiar star, meaning it has an unusual surface abundance of some elements as shown by its spectral lines.

He proposed a class of stars known as Maia variables, which included Gamma Ursae Minoris.

[23] On the other hand, White et al. found low amplitude, but unambiguous, variability in Maia's brightness as seen by Kepler/K2, with a period of 10.3 days, which they attribute to the rotation of a starspot.