Aurora

Aurora is the North Pole of Asteria. Like Earth's North Pole, it has no land and is instead a gigantic mass of ice floating on the Aurorian Ocean. Due to Asteria's orbit and axial tilt, it melts entirely in the summer and re-forms in the winter. Aurora is the only place on Asteria that produces Pastel's Aurora, a scarlet lightshow similar to Earth's own aurora borealis.

Aurorian Ocean
The Aurorian Ocean is a 4 million mi2 ocean between Mithras and Aurora. Unlike the Hesperian Ocean, it hosts a wide array of life, particularly the Tumorpha, an order of semi-aquatic Oriata.