Editing 624 Hektor (section)

== Contact-binary hypothesis ==
[[File:624 Hektor.png|thumb|left| Modelled shape of 624 Hektor from its [[light curve]].]]
Hektor is one of the most elongated bodies of its size in the [[Solar System]], being approximately 403&nbsp;km in its longest dimension, but averaging only around 201&nbsp;km in its other dimensions, with a total volume equivalent to an approx 250&nbsp;km diameter sphere, and an estimated mass of {{val|7.9|e=18|u=kg}} (thus density of 1.0g/cm<sup>3</sup>). It is thought that Hektor might be a [[contact binary (asteroid)|contact binary]] (two asteroids joined by gravitational attraction) like [[216 Kleopatra]], composed of two more rounded lobes of 220 and 183&nbsp;km mean diameters.<ref name="Marchis-2014" /> [[Hubble Space Telescope]] observations of Hektor in 1993 did not show an obvious [[wikt:bilobate|bilobate]] shape because of a limited [[angular resolution]]. On 17 July 2006, the [[Keck telescopes|Keck]] 10-meter-II-telescope and its [[laser guide star]] [[adaptive optics]] (AO) system indicated a bilobate shape for Hektor,<ref name="Marchis-LGS" /> which was reinforced by later studies that, together with multiple historical lightcurves, suggest a rotation period of 6.9205 hours.<ref name="Marchis-2014" />