6545 Leitus
6545 Leitus, "provisional designation:" , is a Jupiter trojan from the Greek camp, approximately in diameter. It was discovered on 5 October 1986, by Slovak astronomer Milan Antal at the Piwnice Astronomical Observatory in Poland. The dark D-type asteroid has a rotation period of 16.3 hours and belongs to the 90 largest Jupiter trojans. Numbered in 1995, it was named in 2021, after the Argonaut Leitus from Greek mythology, who fought in the Trojan War. Orbit and classification. "Leitus" is a dark Jovian asteroid orbiting in the leading Greek camp at Jupiter's Lagrangian point, 60° ahead  of the Gas Giant's orbit in a 1:1 resonance . It is also a non-family asteroid in the Jovian background population. It orbits the Sun at a distance of 4.9–5.4 AU once every 11 years and 8 months (4,265 days; semi-major axis of 5.15 AU). Its orbit has an eccentricity of 0.05 and an inclination of 12° with respect to the ecliptic. The body's observation arc begins with its official discovery observation at Piwnice in October 1986. Numbering and naming. This minor planet was numbered on 9 September 1995 (). On 29 November 2021, IAU's Working  Group Small Body Nomenclature it after the Argonaut Leitus from Greek mythology. He was one of the seven Achaean Leaders in front of whom Poseidon appeared during the Trojans' attack on the Achaean ships, urging them to fight back instead of acting like cowards. Wounded by Hector, Leitus was one of the few to safely return home after the Trojan War. Physical characteristics. In the SDSS-based taxonomy, "Leitus" is dark D-type asteroid, which agrees with the determined spectral type by Pan-STARRS. Its V–I color index of 0.91 is typical for most larger Jupiter trojans "(also see  table below)". Rotation period. In March 2013, a rotational lightcurve of "Leitus" was obtained from photometric observations by Robert Stephens at the Center for Solar System Studies in Landers, California. Lightcurve analysis gave a rotation period of hours with a brightness amplitude of 0.31 magnitude (). Diameter and albedo. According to the survey carried out by the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer and the Infrared Astronomical Satellite IRAS, "Leitus" measures 50.95 and 56.96 kilometers in diameter and its surface has an albedo of 0.068 and 0.0545, respectively. The "Collaborative Asteroid Lightcurve Link" assumes a standard albedo  for a carbonaceous asteroid of 0.057 and calculates a diameter of 53.16 kilometers based on an absolute magnitude of 10.1.