[5] It was discovered by David H. Levy and Henry Holt at Palomar Observatory on 20 June 1990.

Kimmo A. Innanen and Seppo Mikkola note that "contrary to intuition, there is clear empirical evidence for the stability of motion around the L4 and L5 points of all the terrestrial planets over a timeframe of several million years".

[6] At least five other asteroids in near-1:1 resonances with Mars have been discovered, but they do not exhibit trojan behavior.

Due to close orbital similarities, most of the other, smaller, members of the L5 group are hypothesized to be fragments of 5261 Eureka that were detached after it was spun up by the YORP effect (consistent with its rotational period of 2.69 h).

A-class asteroids are tinted red in hue, with a moderate albedo.