(433953) 1997 XR₂ is a sub-kilometer sized asteroid, classified as near-Earth object and potentially hazardous asteroid of the Apollo group. It was discovered on 4 December 1997, by the Lincoln Near-Earth Asteroid Research (LINEAR) program at Lincoln Laboratory's Experimental Test Site near Socorro, New Mexico, in the United States.^[2]

The asteroid orbits the Sun at a distance of 0.9–1.3 AU once every 13 months (408 days). Its orbit has an eccentricity of 0.20 and an inclination of 7° with respect to the ecliptic.

It has an Earth minimum orbital intersection distance of 0.000135 AU, which corresponds to 0.05 lunar distances.^[1] The body's observation arc begins with its official discovery observation, as no precoveries were taken, and no prior identifications were made.^[2]

Between 2002 and 2006, 1997 XR₂ was considered to have about a 1 in 10,000 chance of colliding with Earth on 1 June 2101, based on a 27-day observation arc following its discovery.^[4] With an estimated mass of 1.7×10¹⁰ kilograms, it was ranked at level 1 on the Torino scale (0–10) of impact risk, and was the only near-Earth object to be ranked higher than zero until it was joined by 2004 VD17 at level 1 in November 2004, and then when 99942 Apophis – then known only by its provisional designation 2004 MN₄ – was temporarily assessed at level four in December 2004. Both 2004 VD17 and 99942 Apophis are now rated at level zero.

According to a generic conversion of absolute magnitude to diameter, 1997 XR₂ measures 200 to 230 meters.^[3][4]

As of 2017, this minor planet remains unnamed.^[2]