Editing 624 Hektor (section)

==Satellite==
{{Redirect|Skamandrios (moon)|the mythological figure|Skamandrios (disambiguation){{!}}Scamandrius}}
{{Infobox planet
| name                   = Skamandrios
| image                  = 
| caption                = 
| background             = <!-- #FFFFC0 -->
| discovery_ref          = <ref name="Marchis-2014" />
| discoverer             = Marchis et al.
| discovered             = 2006 July 16
| mpc_name               = Hektor I
| pronounced             = {{IPAc-en|s|k|ə|ˈ|m|æ|n|d|r|i|ə|s}}
| named_after            = [[Astyanax|Scamandrius]]
| alt_names              = {{mp|S/2006 (624) 1}}
| adjectives             = Skamandrian
| orbit_ref              = <ref name="Marchis-2014" />
| epoch                  = 
| semimajor              = {{val|623.5|10|u=km}}
| eccentricity           = {{val|0.31|0.03}}
| period                 = {{val|2.9651|0.0003}} days
| mean_anomaly           = 
| inclination            = {{val|50.1|1.1|u=°}} (to primary)<br />{{val|166.2|3.2|u=°}} (in EQJ2000)
| angular_dist           = 
| asc_node               = {{val|170.7|6.1|u=°}} (in EQJ2000)
| arg_peri               = {{val|113.4|1.4|u=°}} (in EQJ2000)
| satellite_of           = 
| mean_diameter          = {{val|12|3|u=km}} (assuming composition of primary)
| mass                   = 
| density                = 
| albedo                 = 
| spectral_type          = 
| magnitude              = 
| abs_magnitude          = 
}}
A 10–15-km-diameter moon, named '''Skamandrios''', was detected orbiting 624 Hektor in 2006 with a semi-major axis of 623.5&nbsp;km and an orbital period of 2.9651&nbsp;days (71.162&nbsp;hours).<ref name=IAUC8732 /><ref name="Marchis-2014" /> It was confirmed with Keck observations in November 2011,<ref name="Marchis-tweet" /> and was then named on 12 March 2017.<ref name="MPC103967"/> No mass estimate was provided, but the equivalent volume suggests an approximate mass of {{val|8.74|e=14|u=kg}} if the two bodies are of the same density. Its orbit is highly inclined and eccentric, and it is likely that its rotation is chaotic. Marchis et al. (2014) speculate that it was ejected after a low-velocity collision produced the bilobed primary. The newly merged primary could have spun fast enough to be unstable and shed some mass.<ref name="Marchis-2014" /> The dynamics of Skamandrios can be modeled by the restricted [[n-body problem|four-body problem]].<ref>{{cite journal | last1=Burgos-García | first1=Jaime | last2=Celletti | first2=Alessandra | last3=Gales | first3=Catalin | last4=Gidea | first4=Marian | last5=Lam | first5=Wai-Ting | title=Hill Four-Body Problem with Oblate Bodies: An Application to the Sun–Jupiter–Hektor–Skamandrios System | journal=Journal of Nonlinear Science | publisher=Springer Science and Business Media LLC | volume=30 | issue=6 | date=2020-07-16 | issn=0938-8974 | doi=10.1007/s00332-020-09640-x | pages=2925–2970| bibcode=2020JNS....30.2925B | s2cid=225526961 }}</ref>

Hektor is the first known trojan with a satellite companion and, so far, one of only four known binary trojan asteroids in the {{L4}} group (the others being [[16974 Iphthime]], [[3548 Eurybates]], and [[15094 Polymele]]).
[[617 Patroclus]], another large trojan asteroid of the {{L5}} group, consists of two almost equal-sized components.<ref name="Marchis-LGS" /> Two other binary asteroids are known in the L5 group, {{mpl|(17365) 1978 VF|11}} and [[29314 Eurydamas]].<ref name="Johnson's Archive" />