15094 Polymele /pɒlɪˈmiːliː/ is a primitive Jupiter trojan from the Greek camp, approximately 21 kilometers (13 miles) in diameter.
[10][14] It was discovered on 17 November 1999, by astronomers with the Catalina Sky Survey at Mount Lemmon Observatory, Arizona, in the United States.
According to the Latin author Gaius Julius Hyginus (c. 64 BC – AD 17), she is the wife of the Argonaut Menoetius and the mother of Patroclus, who participated in the Trojan War.
Lightcurve analysis gave a rotation period of 5.8607±0.0005 hours with a small brightness amplitude of 0.09±0.03 magnitude (U=2-), which indicates the body is being viewed pole-on.
[5] Following observations of an occultation on 26 March 2022, the Lucy mission team reported the discovery of a natural satellite around Polymele.
The satellite is a smaller asteroid about 5–6 kilometers (3.1–3.7 miles) in diameter, orbiting nearly in the equatorial plane of Polymele at a distance of 204.4 ± 2.6 km (127.0 ± 1.6 mi).
The flyby is scheduled for 15 September 2027, and will approach the asteroid to a distance of 415 km (258 mi) at a relative velocity of 6 km/s (13,000 mph).