(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.

Orbit and classification
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. The body's observation arc begins with its official discovery observation, as no precoveries were taken, and no prior identifications were made.

Impact risk
Between 2002 and 2006, 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. With an estimated mass of $17,000,000,000$ 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 at level 1 in November 2004, and then when 99942 Apophis – then known only by its provisional designation  – was temporarily assessed at level four in December 2004. Both and 99942 Apophis are now rated at level zero.

Recovery
On 24 February 2006, was observed by the Mount Lemmon Survey after being lost for more than 8 years. The refinement of its orbit eliminated the possibility of impact in 2101. It is now known that on 20 November 2101, the asteroid will be 0.0392 AU from Earth.

Physical characteristics
According to a generic conversion of absolute magnitude to diameter, measures 200 to 230 meters.

Naming
As of 2017, this minor planet remains unnamed.