14827 Hypnos magnitude of 18.65, while infrared radiometry gave a radar albedo of no more than 0.067 and a diameter of at least 740 meters. The "Collaborative Asteroid Lightcurve Link" assumes a standard optical albedo for carbonaceous asteroids 0.057 and derives a diameter of 907 meters with an absolute magnitude of 18.94. The diameter agrees with Tom Gehrels 1994-publication "Hazards due to Comets and Asteroids" in which he estimated a mean-diameter of 900 meters for "Hypnos". This minor planet was named after Hypnos from Greek mythology. He is the god of sleep, son of Nyx and Erebus and twin brother of Thanatos.
14827 Hypnos with respect to the ecliptic. It is frequently perturbed by Jupiter. The body's observation arc begins at Anderson Mesa Station the night prior to its official discovery observation at Palomar. As a near-Earth object and potentially hazardous asteroid "Hypnos" has an Earth minimum orbital intersection distance of , which corresponds to 5.7 lunar distances. In 1958, "Hypnos" passed less than 0.03 AU from both Earth and Mars. Neither planet has been approached so closely by "Hypnos" since the 862 AD pass of Earth, or will be until the 2214 pass of Earth. It is also a Mars-crosser. "Hypnos" may be