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{{Use dmy dates|date=April 2019}}
{{DISPLAYTITLE:{{mp|2019 GC|6}}}}▼
{{Infobox planet
| minorplanet = yes
| name = {{mp|2019 GC|6}}
| background = #FFC2E0
| image =
| image_size =
| caption =
| discovery_ref = <ref name="MPC-object" /><ref name="jpldata" />
| discoverer = [[Catalina Sky Survey|CSS]]
| discovery_site = [[Catalina Station|Catalina Stn.]]
| discovered = 9 April 2019
| mpc_name = {{mp|2019 GC|6}}
| alt_names =
| pronounced =
| named_after =
| mp_category = [[Near-Earth object|NEO]]{{·}}[[Apollo asteroid|Apollo]]<ref name="MPC-object" /><ref name="jpldata" />
| orbit_ref = <ref name="jpldata" />
| epoch = 27 April 2019 ([[Julian day|JD]] 2458600.5)
| uncertainty = 5<ref name="jpldata" />{{·}}4<ref name="MPC-object" />
| observation_arc = 17 days
| aphelion = 1.2985 [[Astronomical unit|AU]]
| perihelion = 0.9104 AU
| semimajor = 1.1045 AU
| eccentricity = 0.1757
| period = 1.16 [[Julian year (astronomy)|yr]] (424 d)
| mean_anomaly = 317.32[[Degree (angle)|°]]
| mean_motion = {{Deg2DMS|0.8491|sup=ms}} / day
| inclination = 1.2557°
| asc_node = 211.61°
| arg_peri = 63.845°
| moid = 0.0015 AU<br />(0.5844 [[Lunar distance (astronomy)|LD]])
| mean_diameter = {{val|15|ul=m}} {{small|(est. at [[Geometric albedo|0.20]])}}<ref name="h" /><br />{{val|28|u=m}} {{small|(est. at [[Geometric albedo|0.057]])}}<ref name="h" />
| rotation =
| albedo =
| spectral_type =
| abs_magnitude = 26.5<ref name="MPC-object" /><br />26.51<ref name="jpldata" />
}}
'''{{mp|2019 GC|6}}''' is a very small [[
== Orbit and classification ==
{{mp|2019 GC|6}} is a member of the [[Apollo asteroid|Apollo group]] of asteroids, which are [[Earth-crossing asteroid]]s. They are the largest group of [[near-Earth object]]s with approximately 10,000 known members. It orbits the Sun at a distance of 0.91–1.29 [[Astronomical unit|AU]] once every 14 months (424 days; [[semi-major axis]] of 1.1 AU). Its orbit has an [[orbital eccentricity|eccentricity]] of 0.18 and an [[orbital inclination|inclination]] of 1[[Degree (angle)|°]] with respect to the [[ecliptic]].<ref name="jpldata" />
The body's [[observation arc]] begins with its first observation by the [[Mount Lemmon Survey]] on 31 March 2019, just a few days prior to its potential discovery observation by the [[Catalina Sky Survey]].<ref name="MPC-object" />
== Physical characteristics ==
=== Diameter and albedo ===
The dimensions of the asteroid are estimated to range between {{Convert|7.5–30|m|ft}} and has been compared to size of a house.<ref name="The-Independent" /><ref name="Space.com" /> Based on a magnitude-to-diameter conversion and a measured [[absolute magnitude]] of 26.5, {{mp|2019 GC|6}} measures between 15 and 28 meters in diameter for an assumed [[geometric albedo]] of 0.20 ([[S-type asteroid|siliceous]]) and 0.057 ([[C-type asteroid|carbonaceous]]), respectively.<ref name="MPC-object" /><ref name="h" />
== References ==
{{reflist|30em|refs=
<ref name="jpldata">{{cite web
|type = 2019-04-17 last obs.
|title = JPL Small-Body Database Browser: (2019 GC6)
|url = https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=3840893
|publisher = [[Jet Propulsion Laboratory]]
|accessdate = 30 November 2019}}</ref>
<ref name="MPC-object">{{cite web
|title = 2019 GC6
|work = Minor Planet Center
|url = https://www.minorplanetcenter.net/db_search/show_object?object_id=2019+GC6
|accessdate = 30 November 2019}}</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 = 29 November 2019}}</ref>
<ref name="The-Independent">{{Cite web
|title = Massive asteroid will pass Earth closer than the Moon
|date = 17 April 2019
|website = The Independent
|url = https://www.independent.co.uk/news/science/asteroid-earth-moon-2019-gc6-nasa-collision-space-a8874121.html
|access-date= 18 April 2019}}</ref>
<ref name="Space.com">{{Cite web
|title = A House-Size Asteroid Zipped by Earth Today
|last1 = Weitering |first1=Hanneke
|last2 = Astronomy
|website = Space.com
|url = https://www.space.com/near-earth-asteroid-2019-gc6-flyby.html
|access-date= 18 April 2019}}</ref>
}} <!-- end of reflist -->
== External links ==
* [https://catalina.lpl.arizona.edu/news/2019/04/css-observer-africano-discovers-2019%E2%80%99s-closest-earth-grazing-asteroid CSS Observer Africano Discovers 2019's Closest Earth-Grazing Asteroid], Catalina Sky Survey, 17 April 2019
* {{NeoDys|2019GC6}}
* {{ESA-SSA|2019GC6}}
* {{JPL small body|id=3840893}}
<!--use upon numbering: {{Minor planets navigator| |number=? |PageName={{mp|(?) 2019 GC|6}} | }} -->▼
{{Small Solar System bodies}}
▲<!--use upon numbering: {{Minor planets navigator| |number=? |PageName={{mp|(?) 2019 GC|6}} | }} -->
{{Authority control}}
▲{{DISPLAYTITLE:{{mp|2019 GC|6}}}}
{{DEFAULTSORT:2019 GC6}}
[[Category:Apollo asteroids|#]]
[[Category:Minor planet object articles (unnumbered)]]
[[Category:Discoveries by the Catalina Sky Survey]]
[[Category:Near-Earth objects in 2019|20190409]]
[[Category:Astronomical objects discovered in 2019|20190409]]
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