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(456938) 2007 YV56

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(456938) 2007 YV56
Discovery [1]
Discovered byCSS
Discovery siteMount Lemmon Obs.
Discovery date31 December 2007
Designations
(456938) 2007 YV56
2007 YV56
NEO · Apollo · PHA [1][2]
Orbital characteristics [2]
Epoch 23 March 2018 (JD 2458200.5)
Uncertainty parameter 0
Observation arc8.10 yr (2,959 days)
Aphelion2.5556 AU
Perihelion0.5952 AU
1.5754 AU
Eccentricity0.6222
1.98 yr (722 days)
87.984°
0° 29m 54.24s / day
Inclination6.2441°
102.42°
265.73°
Earth MOID0.0047 AU (1.83 LD)
Venus MOID0.0019 AU
Mars MOID0.0571 AU
Physical characteristics
0.19 km (est. at 0.20)[3]
0.36 km (est. at 0.057)[3]
21.0[2]

(456938) 2007 YV56, provisional designation 2007 YV56, 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.[1]

Orbit and classification

2007 YV56 is an Apollo asteroid that crosses the orbit of Earth.[1][2] Apollo's are the largest group of near-Earth objects with nearly 10 thousand known members.[4]

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.[2] 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.[1]

Close approaches

2007 YV56 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).[2] It has an absolute magnitude of 21.0. This makes it a potentially hazardous asteroid,[1][2] 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.[2]

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).[2]

History of closest approaches of large near-Earth objects since 1914
(less than H 24 and 1 LD)(A)
NEO Date Approach distance in lunar distances Abs. mag
(H) 		Diameter (C)
(m) 		Ref (D)
Nominal(B) Minimum Maximum
(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 UE34 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 YV56 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.[3]

Rotation period

As of 2018, no rotational lightcurve of 2007 YV56 has been obtained from photometric observations. The body's rotation period, pole and shape remain unknown.[2]

Numbering and naming

This minor planet was numbered by the Minor Planet Center on 22 February 2016 (M.P.C. 98584).[5] As of 2018, it has not been named.[1]

References

  1. ^ a b c d e f g "456938 (2007 YV56)". Minor Planet Center. Retrieved 27 February 2018.
  2. ^ a b c d e f g h i j "JPL Small-Body Database Browser: 456938 (2007 YV56)" (2016-02-06 last obs.). Jet Propulsion Laboratory. Retrieved 27 February 2018.
  3. ^ a b c "Asteroid Size Estimator". CNEOS NASA/JPL. Retrieved 12 November 2017.
  4. ^ "List Of Apollo Minor Planets (by designation)". Minor Planet Center. Retrieved 27 February 2018.
  5. ^ "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 27 February 2018.
Preceded by Large NEO Earth close approach
(inside the orbit of the Moon)
2 January 2101 		Succeeded by

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