The asteroid discovered in 1858 and named after the mythological woman is 55 Pandora.
55 Pandora is a main-belt asteroid discovered by the German astronomer George Mary Searle on 10 September 1858. It received the name Pandora from Greek mythology, continuing the nineteenth-century practice of giving many asteroids names drawn from classical figures.
The asteroid is an S-type object, meaning its surface is broadly associated with stony, silicate-rich material. It orbits the Sun in the main asteroid belt between Mars and Jupiter. Like other numbered minor planets, it is identified by its permanent number and name, which together distinguish it from similarly themed objects.
The number is important because Pandora is also used for other astronomical features and fictional settings. 55 Pandora is not one of the first-discovered asteroids and is unrelated to the moon Pandora orbiting Saturn. The asteroid’s discovery date, number, and discoverer provide the specific identification needed for this question.