Natural satellite been directly observed, have been called "moonlets". Small asteroid moons (natural satellites of asteroids), such as Dactyl, have also been called moonlets. The upper limit is also vague. Two orbiting bodies are sometimes described as a double planet rather than primary and satellite. Asteroids such as 90 Antiope are considered double asteroids, but they have not forced a clear definition of what constitutes a moon. Some authors consider the Pluto–Charon system to be a double (dwarf) planet. The most common dividing line on what is considered a moon rests upon whether the barycentre is below the surface of the larger
Sailor Pluto is still considered a member of the Sailor Guardians despite the reclassification of Pluto as a dwarf planet (as opposed to just a planet). Many fans joke that Sailor Moon will reinstate Pluto as a planet after becoming queen. Others joke she was "fired" from the Sailor Guardians. This despite the fact that the moon isn't a planet either yet this doesn't affect Sailor Moon's status and power. There are also Sailor Guardians of asteroids, classified as "minor planets". What astronomical bodies are called clearly has no bearing on the story. Due to her portrayal in the anime and a