Sidonia is incorrectly written and it should be written as "40 Sidonia; is proper name )" being its meaning:
It was the name of one of the characters in the Opera Armide by Christoph Willibald Gluck. It was a woman, Armide's confidant. Name of a United States warship of Guerra. The name of a district or region of the Czech Republic. It is a female name used in Germany.