[7] In 2021, it was named from Greek mythology after King Eetion, who was killed by Achilles during the raid on Thebe.
[8] On 29 November 2021, IAU's Working Group for Small Bodies Nomenclature named it from Greek mythology after King Eetion of Thebe Hypoplakia, father of Andromache, and father-in-law of Hector.
[7] In February 1993, Eetion was observed by astronomers Stefano Mottola and Mario Di Martino with the ESO 1-metre telescope and its DLR MkII CCD-camera at La Silla in Chile.
The photometric observations were used to build a lightcurve showing a rotation period of 12.918±0.022 hours with a brightness variation of 0.18±0.01 magnitude (U=3-).
[6]: 29 According to the survey carried out by NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, Eetion measures 40.4 kilometers in diameter and its surface has an albedo of 0.075,[5] while the Collaborative Asteroid Lightcurve Link assumes a standard albedo for a carbonaceous asteroid of 0.057 and calculates a diameter of 42.23 kilometers, based on an absolute magnitude of 10.6.