It's not Spanish, and it may be the name of the asteroid, although these can also be translated. For the English the goddess is called Amphitrite and actually Amphitrite would be her transliteration from the Greek.
Ancient Greek goddess of the tranquil sea. She was the wife of Poseidon. It means The Third Wave Surrounding. She was a Nereid as she was the daughter of Nereus and Doris. Name given to an asteroid 29 .
Amphitrite-asteroid discovered by A . Marth on March 1, 1854-