At the request of Thetis, he concealed her son Achilles dressed in girl's clothes among his own daughters to save him from the Trojan War until Odysseus drew him out of his disguise.

It is located in the leading Greek camp at the Gas Giant's L4 Lagrangian point, 60° ahead on its orbit (see Trojans in astronomy).

[7] In October 2010, a first rotational lightcurve of Lycomedes was obtained from photometric observations by astronomers at the Palomar Transient Factory in California.

[7][11] In November 2011, follow-up observations over two consecutive nights were made by Daniel Coley at the Goat Mountain Astronomical Research Station (G79) in California.

[8][a] According to the survey carried out by the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, Lycomedes measures between 31.736 and 31.74 kilometers in diameter and its surface has an albedo,[6] while the Collaborative Asteroid Lightcurve Link assumes a standard albedo for a carbonaceous asteroid of 0.057 and calculates a diameter of 40.33 kilometers based on an absolute magnitude of 10.7.