View source for Astronomy:(456938) 2007 YV56

{{DISPLAYTITLE:{{mp|(456938) 2007 YV|56}}}}
{{Infobox planet
 | minorplanet     = yes
 | name            = (456938) {{mp|2007 YV|56}}
 | background      = #FFC2E0
 | image           = 
 | image_size      = 
 | caption         = 
 | discovery_ref   = <ref name="MPC-object" />
 | discoverer      = [[Astronomy:Catalina Sky Survey|CSS]]
 | discovery_site  = [[Astronomy:Mount Lemmon Observatory|Mount Lemmon Obs.]]
 | discovered      = 31 December 2007
 | mpc_name        = (456938) {{mp|2007 YV|56}}
 | alt_names       = {{mp|2007 YV|56}}
 | pronounced      = 
 | named_after     = <!--xafter<br />{{small|()}}<ref name="MPC-object" />-->
 | mp_category     = {{nowrap|[[Astronomy:Near-Earth object|NEO]]{{·}}[[Astronomy:Apollo asteroid|Apollo]]{{·}}[[Astronomy:Potentially hazardous object|PHA]]<ref name="MPC-object" /><ref name="jpldata" />}}
 | orbit_ref       = <ref name="jpldata" />
 | epoch           = 23 March 2018 ([[Astronomy:Julian day|JD]] 2458200.5)
 | uncertainty     = 0
 | observation_arc = 8.10 yr (2,959 days)
 | aphelion        = 2.5556 [[Astronomy:Astronomical unit|AU]]
 | perihelion      = 0.5952 AU
 | semimajor       = 1.5754 AU
 | eccentricity    = 0.6222
 | period          = 1.98 [[Astronomy:Julian year|yr]] (722 days)
 | mean_anomaly    = 87.984[[Degree (angle)|°]]
 | mean_motion     = {{Deg2DMS|0.4984|sup=ms}} / day
 | inclination     = 6.2441°
 | asc_node        = 102.42°
 | arg_peri        = 265.73°
 | moid            = 0.0047 AU (1.83 [[Astronomy:Lunar distance|LD]])
 | venus_moid      = 0.0019 AU
 | mars_moid       = 0.0571 AU
 | mean_diameter   = {{val|0.19|ul=km}} {{small|(est. at [[Physics:Geometric albedo|0.20]])}}<ref name="h" /><br />{{val|0.36|u=km}} {{small|(est. at [[Physics:Geometric albedo|0.057]])}}<ref name="h" />
 | rotation        = 
 | albedo          = 
 | spectral_type   = 
 | abs_magnitude   = 21.0<ref name="jpldata" />
}}

'''{{mp|(456938) 2007 YV|56}}''', provisional designation {{mp|2007 YV|56}}, is a sub-kilometer [[Astronomy:Asteroid|asteroid]] on an eccentric orbit, classified as a [[Astronomy:Near-Earth object|near-Earth object]] and [[Astronomy:Potentially hazardous asteroid|potentially hazardous asteroid]] of the [[Astronomy:Apollo asteroid|Apollo group]], approximately {{convert|190|-|360|m|ft|sigfig=2|sp=us}} in diameter. It was discovered on 31 December 2007, by astronomers of the [[Astronomy:Catalina Sky Survey|Catalina Sky Survey]] conducted at the [[Astronomy:Catalina Station|Catalina Station]] in Arizona, United States.<ref name="MPC-object" />

== Orbit and classification ==

{{mp|2007 YV|56}} is an [[Astronomy:Apollo asteroid|Apollo asteroid]] that [[Astronomy:List of Earth-crossing minor planets|crosses the orbit of Earth]].<ref name="MPC-object" /><ref name="jpldata" /> Apollo's are the largest group of near-Earth objects with nearly 10 thousand known members.<ref name="MPC-APO-list" />

It orbits the Sun at a distance of 0.60–2.55&nbsp;[[Astronomy:Astronomical unit|AU]] once every 2 years (722 days; semi-major axis of 1.58&nbsp;AU). Its orbit has a high [[Astronomy:Orbital eccentricity|eccentricity]] of 0.62 and an [[Astronomy:Orbital inclination|inclination]] of 6[[Degree (angle)|°]] with respect to the [[Astronomy:Ecliptic|ecliptic]].<ref name="jpldata" /> This makes it also a Mars-crossing asteroid, as it crosses the orbit of the Red Planet at 1.66&nbsp;AU, as well as a Venus-crosser due to its aphelion of less than 0.71&nbsp;AU. The body's [[Astronomy:Observation arc|observation arc]] begins at Catalina with its official discovery observation in December 2007.<ref name="MPC-object" />

== Close approaches ==

{{mp|2007 YV|56}} has a minimum orbital intersection distance (MOID) with Earth of {{convert |0.0047 |AU |km mi |abbr=on |lk=off |sigfig=3 |order=flip}}, which corresponds to 1.83 [[Astronomy:Lunar distance|lunar distances]] (LD).<ref name="jpldata" /> It has an [[Astronomy:Absolute magnitude|absolute magnitude]] of 21.0. This makes it a [[Astronomy:Potentially hazardous asteroid|potentially hazardous asteroid]],<ref name="MPC-object" /><ref name="jpldata" /> which are defined as having a MOID of less than {{convert|0.05|AU|LD|abbr=on}} and an absolute magnitude brighter than 22. Besides Earth, it also makes close approaches to [[Astronomy:Venus|Venus]], [[Astronomy:Mars|Mars]] and the [[Astronomy:Moon|Moon]].<ref name="jpldata" />

On 26 December 2007, five days prior to its discovery observation, it passed Earth at a nominal distance of {{convert|0.10037|AU|LD|abbr=on}}. On 2 January 2101, it is predicted to flyby Earth at {{convert|0.00159|AU|LD|abbr=on}} and pass the Moon at a similar distance five hours earlier as well ''(also see {{section link|List of asteroid close approaches to Earth|Predicted encounters}})''.<ref name="jpldata" />


== Physical characteristics ==

The body's [[Astronomy:Asteroid spectral type|spectral type]] is unknown. Near-Earth asteroids are often of a [[Astronomy:S-type asteroid|stony composition]].

=== Diameter and albedo ===

Based on a generic magnitude-to-diameter conversion, {{mp|2007 YV|56}} measures {{convert|190|-|360|m|ft|sp=us}} in diameter, for an [[Astronomy:Absolute magnitude|absolute magnitude]] of 21.0, and an assumed [[Astronomy:Astronomical albedo|albedo]] of 0.20 and 0.057, which represent typical values for [[Astronomy:S-type asteroid|stony]] and [[Astronomy:C-type asteroid|carbonaceous]] asteroids, respectively.<ref name="h" />

=== Rotation period ===

As of 2018, no rotational [[Astronomy:Lightcurve|lightcurve]] of {{mp|2007 YV|56}} has been obtained from [[Astronomy:Photometry|photometric]] observations. The body's [[Rotation period|rotation period]], [[Astronomy:Poles of astronomical bodies|pole]] and shape remain unknown.<ref name="jpldata" />

== Numbering and naming ==

This [[Astronomy:Minor planet|minor planet]] was [[Astronomy:Minor planet designation|numbered]] by the [[Organization:Minor Planet Center|Minor Planet Center]] on 22 February 2016 ({{small|M.P.C. 98584}}).<ref name="MPC-Circulars-Archive" /> As of 2018, it has not been [[Astronomy:List of named minor planets (alphabetical)|named]].<ref name="MPC-object" />

== References ==
{{reflist|30em|refs=

<ref name="jpldata">{{cite web
  |type       = 2016-02-06 last obs.
  |title      = JPL Small-Body Database Browser: 456938 (2007 YV56)
  |url        = https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2456938;cad=1
  |publisher  = [[Organization:Jet Propulsion Laboratory|Jet Propulsion Laboratory]]
  |accessdate = 27 February 2018}}</ref>

<ref name="MPC-object">{{cite web
  |title      = 456938 (2007 YV56)
  |work       = Minor Planet Center
  |url        = https://www.minorplanetcenter.net/db_search/show_object?object_id=456938
  |accessdate = 27 February 2018}}</ref>

<ref name="MPC-APO-list">{{cite web
  |title      = List Of Apollo Minor Planets (by designation)
  |work       = Minor Planet Center
  |url        = https://www.minorplanetcenter.net/iau/lists/t_apollos.html
  |accessdate = 27 February 2018}}</ref>

<ref name="MPC-Circulars-Archive">{{cite web
  |title      = MPC/MPO/MPS Archive
  |work       = Minor Planet Center
  |url        = https://www.minorplanetcenter.net/iau/ECS/MPCArchive/MPCArchive_TBL.html
  |accessdate = 27 February 2018}}</ref>

<ref name="h">{{cite web
  |title      = Asteroid Size Estimator
  |publisher  = CNEOS NASA/JPL
  |url        = https://cneos.jpl.nasa.gov/tools/ast_size_est.html
  |accessdate = 12 November 2017}}</ref>

}} <!-- end of reflist -->

== External links ==
* [https://minorplanetcenter.net/mpec/K08/K08A16.html MPEC 2008-A16 : 2007 YV56], ''Minor Planet Electronic Circular'', 2 January 2008
* [https://minorplanetcenter.net/mpec/K09/K09Y46.html MPEC 2009-Y46 : 2007 YV56], ''Minor Planet Electronic Circular'', 23 December 2009
* [https://www.minorplanetcenter.net/iau/lists/t_phas.html List of the Potentially Hazardous Asteroids (PHAs)], ''Minor Planet Center''
* [https://www.minorplanetcenter.net/iau/lists/PHACloseApp.html PHA Close Approaches To The Earth], ''Minor Planet Center''
* [http://www.minorplanet.info/PHP/lcdbsummaryquery.php Asteroid Lightcurve Database (LCDB)], query form ([http://www.minorplanet.info/lightcurvedatabase.html info] {{Webarchive|url=https://web.archive.org/web/20171216050541/http://www.minorplanet.info/lightcurvedatabase.html |date=16 December 2017 }})
* [https://www.minorplanetcenter.net/iau/lists/NumberedMPs455001.html Discovery Circumstances: Numbered Minor Planets (455001)-(460000)] – Minor Planet Center
* {{NeoDys|456938}}
* {{JPL small body}}

{{s-start}}
{{s-bef|before={{mpl|2005 WY|55}}}}
{{s-ttl|title=Large [[Astronomy:Near-Earth object|NEO]] Earth close approach<br />(inside the orbit of the Moon)|years=2 January 2101}}
{{s-aft|after={{mpl|2007 UW|1}}}}
{{end}}
{{Minor planets navigator | |number=456938 | |PageName={{mp|(456938) 2007 YV|56}} }}
{{Small Solar System bodies}}

{{DEFAULTSORT:456938}}
[[Category:Apollo asteroids]]
[[Category:Potentially hazardous asteroids]]

{{Sourceattribution|(456938) 2007 YV56}}