# (456938) 2007 YV56

(456938) 2007 YV$_{56}$, provisional designation 2007 YV$_{56}$, 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 meters (620–1,200 ft) 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

2007 YV$_{56}$ 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

2007 YV$_{56}$ has a minimum orbital intersection distance (MOID) with Earth of 703,000 km; 437,000 mi (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 (19 LD) 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 (39.06 LD). On 2 January 2101, it is predicted to flyby Earth at 0.00159 AU (0.62 LD) and pass the Moon at a similar distance five hours earlier as well (also see List of asteroid close approaches to Earth § Predicted encounters).
| NEO | Date | Approach distance in lunar distances | Approach distance in lunar distances | Approach distance in lunar distances | Abs. mag (H) | Diameter $^{(C)}$ (m) | Ref $^{(D)}$ |
| NEO | Date | Nominal$^{(B)}$ | Minimum | Maximum | Abs. mag (H) | Diameter $^{(C)}$ (m) | Ref $^{(D)}$ |
| (152680) 1998 KJ9 | 1914-12-31 | 0.606 | 0.604 | 0.608 | 19.4 | 279–900 | data |
| (458732) 2011 MD5 | 1918-09-17 | 0.911 | 0.909 | 0.913 | 17.9 | 556–1795 | data |
| (163132) 2002 CU11 | 1925-08-30 | 0.903 | 0.901 | 0.905 | 18.5 | 443–477 | data |
| 2010 VB1 | 1936-01-06 | 0.553 | 0.553 | 0.553 | 23.2 | 48–156 | data |
| 2002 JE9 | 1971-04-11 | 0.616 | 0.587 | 0.651 | 21.2 | 122–393 | data |
| 2013 UG1 | 1976-10-17 | 0.854 | 0.853 | 0.855 | 22.3 | 73–237 | data |
| 2012 TY52 | 1982-11-04 | 0.818 | 0.813 | 0.822 | 21.4 | 111–358 | data |
| 2012 UE34 | 1991-04-08 | 0.847 | 0.676 | 1.027 | 23.3 | 46–149 | data |
| 2017 VW13 | 2001-11-08 | 0.373 | 0.316 | 3.236 | 20.7 | 153–494 | data |
| 2002 MN | 2002-06-14 | 0.312 | 0.312 | 0.312 | 23.6 | 40–130 | data |
| (308635) 2005 YU55 | 2011-11-08 | 0.845 | 0.845 | 0.845 | 21.9 | 320–400 | data |
| 2011 XC2 | 2011-12-03 | 0.904 | 0.901 | 0.907 | 23.2 | 48–156 | data |
| 2018 AH | 2018-01-02 | 0.773 | 0.772 | 0.773 | 22.5 | 67–216 | data |
| 2018 GE3 | 2018-04-15 | 0.502 | 0.501 | 0.503 | 23.7 | 35–135 | data |
| 2010 WC9 | 2018-05-15 | 0.528 | 0.528 | 0.528 | 23.5 | 42–136 | data |
| (153814) 2001 WN5 | 2028-06-26 | 0.647 | 0.647 | 0.647 | 18.2 | 921–943 | data |
| 99942 Apophis | 2029-04-13 | 0.0989 | 0.0989 | 0.0989 | 19.7 | 310–340 | data |
| 2012 UE$_{34}$ | 2041-04-08 | 0.283 | 0.274 | 0.354 | 23.3 | 46–149 | data |
| 2015 XJ351 | 2047-06-06 | 0.789 | 0.251 | 38.135 | 22.4 | 70–226 | data |
| 2007 TV18 | 2058-09-22 | 0.918 | 0.917 | 0.919 | 23.8 | 37–119 | data |
| 2005 WY55 | 2065-05-28 | 0.865 | 0.856 | 0.874 | 20.7 | 153–494 | data |
| (308635) 2005 YU55 | 2075-11-08 | 0.592 | 0.499 | 0.752 | 21.9 | 320–400 | data |
| (456938) 2007 YV56 | 2101-01-02 | 0.621 | 0.615 | 0.628 | 21.0 | 133–431 | data |
| 2007 UW1 | 2129-10-19 | 0.239 | 0.155 | 0.381 | 22.7 | 61–197 | data |
| 101955 Bennu | 2135-09-25 | 0.531 | 0.507 | 0.555 | 20.19 | 472–512 | data |
| (153201) 2000 WO107 | 2140-12-01 | 0.634 | 0.631 | 0.637 | 19.3 | 427–593 | data |
| 2009 DO111 | 2146-03-23 | 0.896 | 0.744 | 1.288 | 22.8 | 58–188 | data |
| (85640) 1998 OX4 | 2148-01-22 | 0.771 | 0.770 | 0.771 | 21.1 | 127–411 | data |
| 2011 LT17 | 2156-12-16 | 0.998 | 0.955 | 1.215 | 21.6 | 101–327 | data |
| $^{(A)}$ This list includes near-Earth approaches of less than 1 lunar distances (LD) of objects with H brighter than 24. $^{(B)}$ Nominal geocentric distance from the center of Earth to the center of the object (Earth has a radius of approximately 6,400 km). $^{(C)}$ Diameter: estimated, theoretical mean-diameter based on H and albedo range between 0.05 and 0.25. $^{(D)}$ Reference: data source from the JPL SBDB, with AU converted into LD (1 AU≈390 LD) $^{(E)}$ Color codes: unobserved at close approach observed during close approach upcoming approaches Note: All close approaches between 1900 and 2200 are listed (with H<24 at less than 1 LD). Objects not observed during the approach, and simply estimated to have approached on this date, are colored grey. Generically estimated asteroid diameters are given in italics. ||||||||

## 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, 2007 YV$_{56}$ measures 190–360 meters (620–1,180 ft) 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 2007 YV$_{56}$ 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.