Editing 1981 Midas (section)

== Physical characteristics ==

Three rotational [[lightcurve]]s obtained from photometric observations gave a concurring [[rotation period]] of 5.24 hours with a relatively high brightness variation of 0.65, 0.8 and 0.87 in [[Magnitude (astronomy)|magnitude]], respectively ({{small|[[LCDB quality code|U=3/2/3]]}}).<ref name="Torppa-2005" /><ref name="Mottola-1995a" /><ref name="Wisniewski-1997" />

According to the survey carried out by the Japanese [[Akari (satellite)|Akari]] satellite, ''Midas'' measures 1.95 kilometers in diameter and its surface has an [[astronomical albedo|albedo]] of 0.293,<ref name="AKARI" /> while the ''Collaborative Asteroid Lightcurve Link'' assumes an albedo of 0.266 and calculates an identical diameter of 1.95 kilometers with an [[absolute magnitude]] of 15.6.<ref name="lcdb" />

In 1987, ''Midas'' was also detected by radar from [[Goldstone Deep Space Communications Complex]] at a distance of 0.08&nbsp;[[Astronomical unit|AU]] with a measured maximal [[radar cross-section]] of 0.1&nbsp;km<sup>2</sup>.<ref name="Ostro1991" />