The following is a list of unnamed planetoids.
Alpha and Beta Quadrants
This planetoid was located on the outskirts of the Azati Prime star system. It had a rotation of about eight hours.
The Enterprise attempted to hide behind the planetoid to avoid detection by Xindi forces in the system in February of 2154, but was unaware of the fact that there was a listening post on the planetoid below, staffed by three Xindi. Enterprise destroyed the outpost before it could send a message to Azati Prime, but the lack of a report from the outpost alerted Commander Dolim of Enterprise's presence anyway. (ENT: "Azati Prime")
While this body was described as a planetoid by the
Enterprise crew, the outpost was referred to by the Xindi as one of their "lunar outposts", which would suggest that it was a moon instead.
Dark matter nebula planetoid
In 2371 the USS Voyager encountered several planetoids inside a dark matter nebula that the Komar called their home. (VOY: "Cathexis")
In 2371, Neelix's lungs were stolen by Vidiians Dereth and Motura in underground caverns of this M class planetoid. (VOY: "Phage")