Planet or Moon?

[The Savage]

There is Planet Junyo, which always made me wonder if it is a planet with its orbit, or this is actually a moon around the bigger neighbour. What do you think, people?

Edit: also, naming within infocards is quite confusing, since moon isn't really a planet from what I remember from astronomy.

The planet Junyo was surveyed in 57 A.S., during the exploration of the Shikoku system by the famous Kusari explorer, Isao Yoshida, who named the planet after his ship, the Junyo Maru.

The gas giant Seto consists primarily of hydrogen. Its striking orange color and location astride the primary Liberty-Kusari trade route make it a memorable landmark. Its only moon, Junyo, is the sole habitable planet(???) within the Shikoku system.