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2020 QG - 版本历史
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imported>Dksh1412：/* 参考资料 */
2022-11-28T08:01:46Z
<p><span class="autocomment">参考资料</span></p>
<p><b>新页面</b></p><div>{{Infobox planet<br />
| minorplanet = 是<br />
| name = 2020 QG<br />
| background = #FFC2E0<br />
| discovery_ref = &thinsp;<ref name="MPC-object">{{cite web |title = 2020 QG |url = https://www.minorplanetcenter.net/db_search/show_object?object_id=2020+QG |work = Minor Planet Center |publisher = International Astronomical Union |accessdate = 17 August 2020 |archive-date = 2020-08-24 |archive-url = https://web.archive.org/web/20200824070505/https://www.minorplanetcenter.net/db_search/show_object?object_id=2020+QG |dead-url = no }}</ref><ref name="MPEC-2020-Q51">{{cite web |title = MPEC 2020-Q51 : 2020 QG |url = https://minorplanetcenter.net/mpec/K20/K20Q51.html |work = Minor Planet Center |publisher = International Astronomical Union |date = 17 August 2020 |accessdate = 2020-08-18 |archive-date = 2020-08-24 |archive-url = https://web.archive.org/web/20200824070457/https://minorplanetcenter.net/mpec/K20/K20Q51.html |dead-url = no }}</ref><br />
| discoverer = 布莱斯·T·波林（使用史维基瞬变设备）<br />
| discovery_site = [[帕洛马山天文台]]<br />
| discovered = 2020年8月16日<br />
| mpc_name = 2020 QG<br />
| alt_names = ZTF0DxQ<ref name="NEO-Exchange">{{cite web |title = 2020 QG |url = https://neoexchange.lco.global/target/59327/ |work = NEO Exchange |publisher = Las Cumbres Observatory |date = 16 August 2020 |accessdate = 17 August 2020 |archive-date = 2020-08-24 |archive-url = https://web.archive.org/web/20200824070459/https://neoexchange.lco.global/target/59327/ |dead-url = no }}</ref><br />
| mp_category = [[近地小行星]]{{·}}[[阿波罗型小行星]]&thinsp;<ref name="MPC-object"/><br />
| orbit_ref = &thinsp;<ref name="jpldata">{{cite web|type = 2020-08-18 last obs.|title = JPL Small-Body Database Browser: (2020 QG)|url = https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=54051131;cad=1|publisher = [[Jet Propulsion Laboratory]]|accessdate = 18 August 2020|archive-date = 2020-08-19|archive-url = https://web.archive.org/web/20200819180923/https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=54051131;cad=1|dead-url = no}}</ref><br />
| epoch = 2020年5月31日 ([[Julian day|JD]] 2459000.5)<br />
| uncertainty = 6<br />
| observation_arc = 2天<br />
| aphelion = {{val|2.8927|0.0012}} [[Astronomical unit|AU]]<br />
| perihelion = 0.9963 AU<br />
| semimajor = {{val|1.9444|0.0008}} AU<br />
| eccentricity = {{val|0.48763|0.00023}}<br />
| period = 2.71 yr ({{val|990.38|0.63}} d)<br />
| mean_anomaly = {{val|337.40|0.016}}[[Degree (angle)|°]]<br />
| mean_motion = {{Deg2DMS|0.3635266|sup=ms}} / day<br />
| inclination = {{val|5.4754|0.006}}°<br />
| asc_node = 143.500°<br />
| arg_peri = {{val|162.01|0.067}}°<br />
| moid = {{Convert|0.00027|AU|km|abbr=on}}<br />
| mean_diameter = {{val|3|ul=m|p=~}} {{small|(est. at ~[[Geometric albedo|0.17]])}}<ref name="NEO-Exchange"/><br/>{{val|2|-|14|u=m}} {{small|(est. at 0.01–0.60)}}<ref name="NEO-Exchange"/><br />
| rotation = <br />
| albedo = <br />
| spectral_type = <br />
| abs_magnitude = {{val|29.84|0.26}}<ref name="jpldata"/><br />
}}<br />
<br />
'''2020 QG'''，编号'''ZTF0DxQ'''<ref name="NEO-Exchange"/>，是一颗[[越地小行星|掠地]][[近地小行星]]，属于[[阿波罗型小行星]]。于2020年8月16日04:09[[国际标准时间|UT]]掠过南半球上空，离地球最近距离为2,940公里（少于地球直径1/4）。<ref name="jpldata"/>由[[加州理工学院]]位于[[帕洛马山天文台]]的史维基瞬变设备于2020年8月16日首次发现，发现时距小行星掠过近地点已过去六小时。<ref name="MPC-object"/><br />
<br />
2020 QG是已知的距离地球最近的近地小行星，[[绝对星等]]只有29.8，直径约为3米<ref name="NEO-Exchange"/>，体积上和[[2008 TC3]]类似。<br />
<br />
==轨道==<br />
2020 QG绕太阳运行的轨道半径约为1.0–2.9个[[天文单位]]，绕行一圈需要2.7年（990天）。其[[轨道离心率]]为0.49，于[[黄道|黄道面]]的[[轨道倾角]]为5.5°。2020年掠过地球后，由于地球引力改变轨道，其绕行太阳的周期变为964天。<br />
<br />
==探测==<br />
由于2020 QG体积极小，且极为暗淡，所以极难被发现。推算2010至2020期间，2020 QG的[[视星等]]只有31。<ref name="NEODyS10-20">{{cite web |title = 2020QG Ephemerides for 2010–2020 |publisher = [[NEODyS]] (Near Earth Objects – Dynamic Site) |url = https://newton.spacedys.com/neodys/index.php?pc=1.1.3.1&n=2020QG&oc=500&y0=2010&m0=1&d0=1&h0=0&mi0=0&y1=2020&m1=1&d1=1&h1=0&mi1=0&ti=10.0&tiu=days |accessdate = 2020-08-18 |archive-date = 2020-08-24 |archive-url = https://web.archive.org/web/20200824070511/https://newton.spacedys.com/neodys/index.php?pc=1.1.3.1&n=2020QG&oc=500&y0=2010&m0=1&d0=1&h0=0&mi0=0&y1=2020&m1=1&d1=1&h1=0&mi1=0&ti=10.0&tiu=days |dead-url = no }}</ref>如果使用[[哈勃空间望远镜]]观测，测需要整整3周的曝光时间才能发现视星等只有31的天体。<br />
<br />
==参考资料==<br />
{{reflist}}<br />
<br />
{{2020年太空活動}}<br />
[[Category:阿波罗型小行星]]<br />
[[Category:2020年发现的天体]]</div>
imported>Dksh1412