(456938) 2007 YV56

, provisional designation, is a sub-kilometer asteroid on an eccentric orbit, classified as a near-Earth object and potentially hazardous asteroid of the Apollo group, approximately 190 - 360 m in diameter. It was discovered on 31 December 2007, by astronomers of the Catalina Sky Survey conducted at the Catalina Station in Arizona, United States.

Orbit and classification
is an Apollo asteroid that crosses the orbit of Earth. Apollo's are the largest group of near-Earth objects with nearly 10 thousand known members.

It orbits the Sun at a distance of 0.60–2.55 AU once every 2 years (722 days; semi-major axis of 1.58 AU). Its orbit has a high eccentricity of 0.62 and an inclination of 6° with respect to the ecliptic. This makes it also a Mars-crossing asteroid, as it crosses the orbit of the Red Planet at 1.66 AU, as well as a Venus-crosser due to its aphelion of less than 0.71 AU. The body's observation arc begins at Catalina with its official discovery observation in December 2007.

Close approaches
has a minimum orbital intersection distance (MOID) with Earth of 0.0047 AU, which corresponds to 1.83 lunar distances (LD). It has an absolute magnitude of 21.0. This makes it a potentially hazardous asteroid, which are defined as having a MOID of less than 0.05 AU and an absolute magnitude brighter than 22. Besides Earth, it also makes close approaches to Venus, Mars and the Moon.

On 26 December 2007, five days prior to its discovery observation, it passed Earth at a nominal distance of 0.10037 AU. On 2 January 2101, it is predicted to flyby Earth at 0.00159 AU and pass the Moon at a similar distance five hours earlier as well (also see ).

Physical characteristics
The body's spectral type is unknown. Near-Earth asteroids are often of a stony composition.

Diameter and albedo
Based on a generic magnitude-to-diameter conversion, measures 190 - 360 m in diameter, for an absolute magnitude of 21.0, and an assumed albedo of 0.20 and 0.057, which represent typical values for stony and carbonaceous asteroids, respectively.

Rotation period
As of 2018, no rotational lightcurve of has been obtained from photometric observations. The body's rotation period, pole and shape remain unknown.

Numbering and naming
This minor planet was numbered by the Minor Planet Center on 22 February 2016 (M.P.C. 98584). As of 2018, it has not been named.