Astronomy:(456938) 2007 YV56
| Discovery[1] | |
|---|---|
| Discovered by | CSS |
| Discovery site | Mount Lemmon Obs. |
| Discovery date | 31 December 2007 |
| Designations | |
| (456938) 2007 YV56 | |
| 2007 YV56 | |
| Minor planet category | NEO · Apollo · PHA[1][2] |
| Orbital characteristics[2] | |
| Epoch 23 March 2018 (JD 2458200.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 8.10 yr (2,959 days) |
| |{{{apsis}}}|helion}} | 2.5556 AU |
| |{{{apsis}}}|helion}} | 0.5952 AU |
| 1.5754 AU | |
| Eccentricity | 0.6222 |
| Orbital period | 1.98 yr (722 days) |
| Mean anomaly | 87.984° |
| Mean motion | 0° 29m 54.24s / day |
| Inclination | 6.2441° |
| Longitude of ascending node | 102.42° |
| 265.73° | |
| Earth MOID | 0.0047 AU (1.83 LD) |
| Venus MOID | 0.0019 AU |
| Mars MOID | 0.0571 AU |
| Physical characteristics | |
| Mean diameter | 0.19 km (est. at 0.20)[3] 0.36 km (est. at 0.057)[3] |
| Absolute magnitude (H) | 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]
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
- ↑ 1.0 1.1 1.2 1.3 1.4 1.5 1.6 "456938 (2007 YV56)". Minor Planet Center. https://www.minorplanetcenter.net/db_search/show_object?object_id=456938. Retrieved 27 February 2018.
- ↑ 2.0 2.1 2.2 2.3 2.4 2.5 2.6 2.7 2.8 2.9 "JPL Small-Body Database Browser: 456938 (2007 YV56)". Jet Propulsion Laboratory. https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2456938;cad=1. Retrieved 27 February 2018.
- ↑ 3.0 3.1 3.2 "Asteroid Size Estimator". CNEOS NASA/JPL. https://cneos.jpl.nasa.gov/tools/ast_size_est.html. Retrieved 12 November 2017.
- ↑ "List Of Apollo Minor Planets (by designation)". Minor Planet Center. https://www.minorplanetcenter.net/iau/lists/t_apollos.html. Retrieved 27 February 2018.
- ↑ "MPC/MPO/MPS Archive". Minor Planet Center. https://www.minorplanetcenter.net/iau/ECS/MPCArchive/MPCArchive_TBL.html. Retrieved 27 February 2018.
External links
- MPEC 2008-A16 : 2007 YV56, Minor Planet Electronic Circular, 2 January 2008
- MPEC 2009-Y46 : 2007 YV56, Minor Planet Electronic Circular, 23 December 2009
- List of the Potentially Hazardous Asteroids (PHAs), Minor Planet Center
- PHA Close Approaches To The Earth, Minor Planet Center
- Asteroid Lightcurve Database (LCDB), query form (info )
- Discovery Circumstances: Numbered Minor Planets (455001)-(460000) – Minor Planet Center
- (456938) 2007 YV56 at NeoDyS-2, Near Earth Objects—Dynamic Site
- Ephemeris · Obs prediction · Orbital info · MOID · Proper elements · Obs info · Close · Physical info · NEOCC
- (456938) 2007 YV56 at the JPL Small-Body Database
| Preceded by 2005 WY55 |
Large NEO Earth close approach (inside the orbit of the Moon) 2 January 2101 |
Succeeded by 2007 UW1 |
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