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{{Infobox Planet
|minorplanet = yes
|width = 25em
|bgcolour =
|apsis =
|name = (137805) 1999 YK5
|symbol =
|image =
|caption =
|discovery = yes
|discovery_ref =
|discoverer =LINEAR
|discovery_site =704
|discovered = 1999/12/28
|designations = yes
|mp_name =
|alt_names =
|mp_category =
|orbit_ref =
|epoch =
|aphelion =1.292
|perihelion =0.366
|semimajor =0.829
|eccentricity =0.558
|period =
|avg_speed =
|inclination =16.7
|asc_node =349.6
|mean_anomaly =270.6
|arg_peri =292.8
|satellites =
|physical_characteristics = yes
|dimensions =
|mass =
|density =
|surface_grav =
|escape_velocity =
|sidereal_day =
|axial_tilt =
|pole_ecliptic_lat =
|pole_ecliptic_lon =
|albedo =
|temperatures=
|temp_name1 =
|mean_temp_1 =
|max_temp_1 =
|temp_name2 =
|max_temp_2 =
|spectral_type =
|abs_magnitude =16.6
}}
'''(137805) 1999 YK5''' adalah sebuah [[asteroid]]. Asteroid ini merupakan bagian dari [[asteroid Aten]], yang terletak dekat dengan Bumi[[bumi]]. [[Eksentrisitas orbit]] asteroid ini tercatat sebesar 0.558, sementara [[magnitudo mutlak]]nya adalah 16.6.
== Pembentukan ==
Seperti [[asteroid]] pada umumnya, asteroid ini terbentumterbentuk dari [[nebula]] [[matahari]] primordial sebagai pecahan [[planetisimal]], sesuatu di nebula matahari muda yang tidak cukup besar untuk berubah menjadi [[planet]].<ref>{{cite web | title=What Are Asteroids And Comets? | url=http://neo.jpl.nasa.gov/faq/#ast | work=Near Earth Object Program FAQ | publisher=[[NASA]] | accessdate=13 September 2010 | archiveurl= httphttps://web.archive.org/web/20100909210213/http://neo.jpl.nasa.gov/faq/#ast | archivedate= 9 September 2010-09-09 | deadurl=no no}}</ref>
== Referensi ==
{{Reflist}}
== Pranala luar ==
* [http://www.minorplanetcenter.net/iau/lists/t_atens.html Daftar asteroid aten] - ''The International Astronomical Union Minor Planet Center.''▼
▲* [http://www.minorplanetcenter.net/iau/lists/t_atens.html Daftar asteroid atenAten] - ''The International Astronomical Union Minor Planet Center.''