Ceresian

Ceresian (also known as Merjuparian) is a non-binary xenogender in the celestial gender system. It is a combination of juparian and mercurian. A ceresian person may feel both at once or they may be fluid between them, or they may feel different amounts of each at different times.

Flag
The term ceresian and the flag were created by Tumblr user Juparian on December 31, 2017.

Etymology
The root of ceresian is Ceres, which is the name of an asteroid, the largest object in the asteroid belt.