Salacia was discovered on 22 September 2004, by American astronomers Henry Roe, Michael Brown and Kristina Barkume at the Palomar Observatory in California, United States. It was named after the Roman goddess Salacia. It has one known moon, Actaea.
It has an average density of 1.51 g/cm3. Salacia is estimated to be around 846 km in diameter. Salacia has the lowest albedo of any known large trans-Neptunian object.
- "IAU Minor Planet Center". www.minorplanetcenter.net. Retrieved 2020-12-04.