Atami is a Mars-crossing asteroid, a dynamically unstable group between the main belt and the near-Earth populations, crossing the orbit of Mars at 1.666 AU.
[3] Atami is a common stony S-type asteroid in both the Tholen and SMASS classification.
[5] Due to the similar size of the primary and secondary the Minor Planet Center lists this as a binary companion.
[12] According to the survey carried out by NASA's Wide-field Infrared Survey Explorer and its subsequent NEOWISE mission, Atami measures 8.24 kilometers in diameter and its surface has an albedo of 0.258,[6] while the Collaborative Asteroid Lightcurve Link assumes a standard albedo for stony asteroids of 0.20 and calculates a diameter of 9.35 kilometers based on an absolute magnitude of 12.51.
The minor planet was named after Atami, a Japanese city and harbor near Tokyo, Japan.