If the object is round and travels in an orbit around Neptune with other space objects, then this object is a moon, not a dwarf planet.
A natural satellite is a celestial body that moves around (orbit) a planet such as occurs with the Moon and the Earth planet.
In order to discover the nature of a celestial body scientists need to observe the orbit and the movement of these objects in space.
In conclusion, if the object is round and travels in an orbit around Neptune with other space objects, then this object is a moon, not a dwarf planet.
Learn more about natural satellites here:
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