编辑“︁2019 XS”︁

{{Infobox planet
| minorplanet = yes
| name = 2019 XS
| background = #FFC2E0
| image = 2019XS Goldstone radar Nov11.gif
| image_size = 
| caption = 
| discovery_ref = &thinsp;<ref name="MPC-object"/><ref name="MPEC-2019-X47"/>
| discoverer = [[萊蒙山巡天數據|MLS]]
| discovery_site = [[萊蒙山天文台]]
| discovered = 2019年12月2日
| mpc_name = 2019 XS
| alt_names = C1HDFQ2&thinsp;<ref name="NEO-Exchange"/>
| pronounced = 
| named_after = 
| mp_category = {{nowrap|[[近地天體|NEO]]{{·}}[[阿波羅型小行星|阿波羅]]&thinsp;<ref name="jpldata"/>}}
| orbit_ref = &thinsp;<ref name="jpldata"/>
| epoch = 2020年7月1日([[儒略日|JD]] 2459396.5)
| uncertainty = 0
| observation_arc = 20.68年(7,555 日)
| earliest_precovery_date = 2000年4月4日
| aphelion = 1.333 [[天文單位|AU]]
| perihelion = 0.6754 AU
| time_periastron = 
| semimajor = 1.004 AU
| eccentricity = 0.3274
| period = 1.01 年(367.51日)
| mean_anomaly = 300.541[[度 (angle)|°]]
| mean_motion = {{Deg2DMS|0.9795768|sup=ms}} / day
| inclination = 4.191°
| asc_node = 49.689°
| arg_peri = 249.977°
| moid = {{cvt|0.00387|AU|km}}
| mean_diameter = 
| rotation = 
| albedo = 
| spectral_type = 
| magnitude = 20.5(發現時)&thinsp;<ref name="MPEC-2019-X47"/>
| abs_magnitude = {{val|23.7|0.3}}&thinsp;<ref name="jpldata"/><ref name="MPC-object"/>
}}

'''2019 XS'''是[[美國]][[亞利桑那州]][[萊蒙山天文台]]從[[萊蒙山巡天數據]]於2019年12月2日發現的[[阿波羅型小行星|阿波羅型]][[近地天體|近地小行星]]<ref name="MPEC-2019-X47"/>。它將在2021年11月9日03:48[[UTC]]以{{cvt|1.4930|LD|km mi}}的距離掠過地球；在此期間，國際小行星預警網路將檢視觀測結果，以確認預報的精確性<ref name="IAWN"/><ref name="MPEC-2021-T79"/><ref name="MPEC-2020-V63"/>。

== 相關條目 ==
* {{mpl|2012 TC|4}}：另一顆列在國際小行星預警網路(IAWN)觀察時序上的近地小行星。

== 參考資料 ==
{{reflist|refs=

<ref name="jpldata">{{cite web
 |type         = 2020-12-10 last obs.
 |title        = JPL Small-Body Database Browser: (2019 XS)
 |url          = https://ssd.jpl.nasa.gov/tools/sbdb_lookup.html#/?sstr=2019XS&view=OPC
 |publisher    = [[Jet Propulsion Laboratory]]
 |accessdate   = 2021-10-12
 |archive-date = 2022-11-18
 |archive-url  = https://web.archive.org/web/20221118233034/https://ssd.jpl.nasa.gov/tools/sbdb_lookup.html#/?sstr=2019XS&view=OPC
 |dead-url     = no
}}</ref>

<ref name="MPC-object">{{cite web
  |title      = 2019 XS
  |url        = http://www.minorplanetcenter.net/db_search/show_object?object_id=2019+XS
  |work       = Minor Planet Center
  |publisher  = International Astronomical Union
  |accessdate = 2021-10-12}}</ref>

<ref name="NEO-Exchange">{{cite web
 |title        = 2019 XS
 |url          = https://neoexchange.lco.global/target/55343/
 |work         = NEO Exchange
 |publisher    = [[Las Cumbres Observatory]]
 |date         = 2021-10-05
 |accessdate   = 2021-10-12
 |archive-date = 2022-05-22
 |archive-url  = https://web.archive.org/web/20220522011346/https://neoexchange.lco.global/target/55343/
 |dead-url     = no
}}</ref>

<ref name="MPEC-2019-X47">{{cite web
  |title      = MPEC 2019-X47 : 2019 XS
  |url        = https://minorplanetcenter.net/mpec/K19/K19X47.html
  |work       = Minor Planet Electronic Circular
  |publisher  = [[Minor Planet Center]]
  |date       = 2019-12-04
  |accessdate = 2021-10-12}}</ref>

<ref name="MPEC-2020-V63">{{cite web
  |title      = MPEC 2020-V63 : 2019 XS
  |url        = https://www.minorplanetcenter.net/mpec/K20/K20V63.html
  |work       = Minor Planet Electronic Circular
  |publisher  = [[Minor Planet Center]]
  |date       = 2020-11-10
  |accessdate = 2021-10-12}}</ref>

<ref name="MPEC-2021-T79">{{cite web
 |title        = MPEC 2021-T79 : International Asteroid Warning Network (IAWN) Timing Campaign
 |url          = https://minorplanetcenter.net/mpec/K21/K21T79.html
 |work         = Minor Planet Electronic Circular
 |publisher    = [[Minor Planet Center]]
 |date         = 2021-10-05
 |accessdate   = 2021-10-12
 |archive-date = 2021-10-05
 |archive-url  = https://web.archive.org/web/20211005131525/https://www.minorplanetcenter.net/mpec/K21/K21T79.html
 |dead-url     = no
}}</ref>

<ref name="IAWN">{{cite web
 |title        = 2019 XS: Timing Assessment
 |url          = https://iawn.net/obscamp/2019XS/
 |publisher    = International Asteroid Warning Network
 |date         = 2021-10-03
 |accessdate   = 2021-10-12
 |archive-date = 2022-04-28
 |archive-url  = https://web.archive.org/web/20220428140013/https://iawn.net/obscamp/2019XS/
 |dead-url     = no
}}</ref>

}}

== 外部連結 ==
* [https://iawn.net/obscamp/2019XS/ 2019 XS: Timing Assessment] {{Wayback|url=https://iawn.net/obscamp/2019XS/ |date=20220428140013 }}, International Asteroid Warning Network, 3 October 2021
* [https://echo.jpl.nasa.gov/asteroids/Orpheus/Orpheus.2021.goldstone.planning.html Goldstone Radar Observations Planning: Orpheus, 2004 UE, 2019 XS, and 2010 VK139] {{Wayback|url=https://echo.jpl.nasa.gov/asteroids/Orpheus/Orpheus.2021.goldstone.planning.html |date=20211206134748 }}, Lance A. M. Benner, Jet Propulsion Laboratory
* {{NeoDys|2019xs}}
* {{ESA-SSA|2019XS}}
* {{JPL small body|id=3893865}}

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{{DEFAULTSORT:2019 XS}}
[[Category:阿波羅型小行星|#]]
[[Category:2019年發現的天體|20191202]]