| 词条 | 2002 RN109 |
| 释义 |
| minorplanet = yes | name = {{mp|2002 RN|109}} | background = #C2E0FF | image = | image_size = | caption = | discovery_ref = [1] | discoverer = LINEAR | discovery_site = Lincoln Lab's ETS | discovered = 6 September 2002 | mpc_name = {{mp|2002 RN|109}} | alt_names = | pronounced = | named_after = | mp_category = {{nowrap|TNO {{·}}damocloid [3]}} unusual [4]{{·}}distant [1] | orbit_ref = | epoch = 27 April 2019 (JD 2458600.5) | uncertainty = 4 | observation_arc = 80 days | aphelion = 1090.71 AU | perihelion = 2.6915 AU | semimajor = 546.70 AU | eccentricity = 0.9951 | period = 12,783 yr | mean_anomaly = 0.4600° | mean_motion = {{Deg2DMS|0.0001|sup=ms}} / day | inclination = 58.137° | asc_node = 170.50° | arg_peri = 212.28° | tisserand = 1.0820 | mean_diameter = {{val|4|ul=km}} {{small|(est.)}}[3] | rotation = | albedo = 0.09 {{small|(assumed)}}[3] | spectral_type = | abs_magnitude = 15.3[1] }}{{mp|2002 RN|109}} is a trans-Neptunian object and damocloid on a highly eccentric, cometary-like orbit. It was first observed on 6 September 2002, by astronomers with the Lincoln Near-Earth Asteroid Research at the Lincoln Lab's ETS near Socorro, New Mexico, in the United States.[1] The unusual object measures approximately {{convert|4|km|mi|abbr=off|sigfig=1|sp=us}} in diameter.[3] It has the second highest orbital eccentricity of any known minor planet, after {{mpl|2005 VX|3}}.[13] Description{{mp|2002 RN|109}} may be a dormant comet that has not been seen outgassing. In the past it may have made closer approaches to the Sun that could have removed most near-surface volatiles. It orbits the Sun at a distance of 2.7–1,091 AU once every 12783 years (semi-major axis of 546.7 AU). Its orbit has an eccentricity of 0.9951 and an inclination of 58° with respect to the ecliptic. The body's observation arc begins with a precovery observation at Lincoln Laboratory's Experimental Test Site on 16 August 2002, or three weeks prior to its first observation.[1] The observation arc only spans over 80 days. The object has not been observed since November 2002 about 2 months before it came to perihelion 2.7 AU from the Sun. During perihelion passage the object was 2.9 AU from Earth. {{mp|2002 RN|109}} belongs to the dynamical group of damocloids due to its low Tisserand parameter (TJupiter of 1.0820). It is also a Jupiter-, Saturn-, Uranus-, and Neptune-crosser. The object has the seventh-largest heliocentric semi-major axis and aphelion of all known minor planets, while its extreme eccentricity brings it well within the orbit of Jupiter when at perihelion. See also
References1. ^1 2 3 4 5 {{cite web |title = 2002 RN109 |work = Minor Planet Center |url = https://www.minorplanetcenter.net/db_search/show_object?object_id=2002+RN109 |accessdate = 20 November 2018}} [1][2][3][4]2. ^1 {{cite web |title = List Of Other Unusual Objects |work = Minor Planet Center |date = 14 November 2018 |url = https://www.minorplanetcenter.net/iau/lists/t_others.html |accessdate = 20 November 2018}} 3. ^1 2 3 4 {{cite web |title = List of Known Trans-Neptunian Objects |work = Johnston's Archive |date = 7 October 2018 |last = Johnston |first= Wm. Robert |url = http://www.johnstonsarchive.net/astro/tnoslist.html |accessdate = 19 November 2018}} 4. ^1 {{cite web |title=JPL Small-Body Database Search Engine: Asteroids and a > 100 (AU) |publisher=JPL Solar System Dynamics |url=http://ssd.jpl.nasa.gov/sbdb_query.cgi?obj_group=all;obj_kind=ast;obj_numbered=all;OBJ_field=0;ORB_field=0;c1_group=ORB;c1_item=Bh;c1_op=%3E;c1_value=100;table_format=HTML;max_rows=100;format_option=comp;c_fields=AcBhBgBjBiBnBsCjCpAiCkBe;.cgifields=format_option;.cgifields=ast_orbit_class;.cgifields=table_format;.cgifields=obj_kind;.cgifields=obj_group;.cgifields=obj_numbered;.cgifields=com_orbit_class&query=1&c_sort=BhD |accessdate=2014-10-15}} (Epoch defined at will change every 6 months or so) }} External links
5 : Damocloids|Trans-Neptunian objects|Unusual minor planets|Minor planet object articles (unnumbered)|Astronomical objects discovered in 2002 |
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