The asteroid's closest encounter with Earth will be on 29 April 2073, when it is projected to pass at 0.0113 AU (4.4 LD) only (see table).

[18] On 28 April 2017, a 2.7 cm (1 in) fragment of 2013 YT1 is suspected of having impacted Earth creating a fireball over Kyoto, Japan.

[8][3][9][10] Analysis of the best-rated lightcurve gave a short rotation period of 2.343 hours with a brightness amplitude between 0.16 and 0.27 magnitude.

[3][5][6][7][11] The Collaborative Asteroid Lightcurve Link derives an albedo of 0.5848 and adopts a diameter of 1.0 kilometer based on an absolute magnitude of 16.2.

[3] Follow-up observations confirmed a 210-meter sized minor-planet moon orbiting its primary every 30 hours at a distance of 2.7 km.