Tags: Asteroid.
The Nysa or Nysian asteroids (also known as the Hertha family or the Polana family) are a group of asteroids in the Main Belt orbiting the sun between 2.41 and 2.5 AU. Asteroids in this family have eccentricities between 0.12 and 0.21 and inclinations of 1.4 to 4.3. The family derives its name from its most massive member 44 Nysa. It has also been known as the Hertha (Herthian) family.