| 词条 | (65407) 2002 RP120 |
| 释义 |
| minorplanet = yes | name = {{mp|(65407) 2002 RP|120}} | background = #C2E0FF | image = | image_size = | caption = | discovery_ref = [1] | discoverer = LONEOS | discovery_site = Anderson Mesa Stn. | discovered = 4 September 2002 | mpc_name = (65407) {{mp|2002 RP|120}} | alt_names = {{mp|2002 RP|120}} | pronounced = | named_after = | mp_category = {{nowrap|TNO {{·}}damocloid [3]}} unusual [4]{{·}}distant [1] | orbit_ref = | epoch = 27 April 2019 (JD 2458600.5) | uncertainty = 2 | observation_arc = 3.35 yr (1,225 d) | aphelion = 105.39 AU | perihelion = 2.4544 AU | semimajor = 53.920 AU | eccentricity = 0.9545 | period = 395.95 yr (144,619 d) | mean_anomaly = 15.061° | mean_motion = {{Deg2DMS|0.0025|sup=ms}} / day | inclination = 118.97° | asc_node = 39.263° | arg_peri = 357.79° | tisserand = −0.8340 | mean_diameter = {{val|14.6|2.8|ul=km}}[7] | rotation = {{val|200|ul=h}}[8] | albedo = {{val|0.098|0.036}}[3][7] | spectral_type = B–R {{=}} 1.37[3] | abs_magnitude = 12.3[1] }} {{mp|(65407) 2002 RP|120}}, provisional designation {{mp|2002 RP|120}}, is a trans-Neptunian object and damocloid from the outer Solar System. Its orbit is retrograde and comet-like, and has a high eccentricity. It was discovered on 4 September 2002 by astronomers with the LONEOS survey at Anderson Mesa Station, Arizona, in the United States. The unusual object measures approximately {{convert|14.6|km|mi|abbr=off|sp=us}} in diameter and is likely elongated in shape. It is a slow rotator and potentially a tumbler as well.[14] The object was probably ejected from the ecliptic by Neptune.{{citation needed|date=November 2018}} Orbit and classification{{mp|2002 RP|120}} is a member of the damocloids,[3] with a retrograde orbit and a negative TJupiter of −0.8340. It is also a trans-Neptunian object, as its orbit has a semi-major axis larger than that of Neptune (30.1 AU). The Minor Planet Center lists it as a critical object, centaur, and (other) unusual minor planet due to an orbital eccentricity of more than 0.5.[4]It orbits the Sun at a distance of 2.5–105 AU once every 396 years (semi-major axis of 53.92 AU). Its orbit has an eccentricity of 0.95 and an inclination of 119° with respect to the ecliptic. The body's observation arc begins with a precovery taken by Astrovirtel {{Obscode|I03}} at ESO's La Silla Observatory in February 2001, or 19 months prior to its official discovery observation at Anderson Mesa.[1] Numbering and namingThis minor planet was permanently numbered {{LoMP|65407|(65407)}} by the Minor Planet Center on 14 June 2003 ({{small|M.P.C. 48994}}).[20] As of 2018, it has not been named.[1] Physical characteristicsThe object has a B–R magnitude of 1.37,[3] typical for most dynamical groups in the outer Solar System. Rotation periodIn October 2010, a rotational lightcurve of {{mp|2002 RP|120}} was obtained from photometric observations by French amateur astronomer René Roy . Lightcurve analysis gave a rotation period of 200 hours with a brightness amplitude of 0.6 magnitude, indicative of an elongated, non-spherical shape ({{small|U=2}}).[8] With a rotation period above 100 hours, it is a typical slow rotator. Diameter and albedoAccording to the survey of minor-planet albedos of bodies in a comet-like orbit, carried out by Yanga Fernández in collaboration with David Jewitt and Scott Sheppard at the Institute for Astronomy, Hawaii, {{mp|2002 RP|120}} measures 14.6 kilometers in diameter and its surface has an albedo of 0.098.[7] Johnston's archive gives a rounded figure of 15 kilometers.[3] References1. ^1 2 3 4 5 {{cite web |title = 65407 (2002 RP120) |work = Minor Planet Center |url = https://www.minorplanetcenter.net/db_search/show_object?object_id=65407 |accessdate = 20 November 2018}} [1][2][3][4][5][6][7]2. ^1 {{cite web |title = MPC/MPO/MPS Archive |work = Minor Planet Center |url = https://www.minorplanetcenter.net/iau/ECS/MPCArchive/MPCArchive_TBL.html |accessdate = 20 November 2018}} 3. ^1 2 {{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}} 4. ^1 2 3 4 5 6 {{cite web |title = List of Known Trans-Neptunian Objects |work = Johnston's Archive |date = 30 December 2017 |last = Johnston |first= Wm. Robert |url = http://www.johnstonsarchive.net/astro/tnoslist.html |accessdate = 1 March 2018}} 5. ^1 2 {{cite web |title = Asteroids and comets rotation curves – (65407) |last = Behrend |first = Raoul |publisher = Geneva Observatory |url = http://obswww.unige.ch/~behrend/page5cou.html#065407 |accessdate = 1 March 2018}} 6. ^1 {{cite web |title = LCDB Data for (65407) |publisher = Asteroid Lightcurve Database (LCDB) |url = http://www.minorplanet.info/PHP/GenerateALCDEFPage_Local.php?AstInfo=65407%7C |accessdate = 1 March 2018}} 7. ^1 2 3 {{Cite journal |first1 = Yanga R. |last1 = Fernández |first2 = David C. |last2 = Jewitt |first3 = Scott S. |last3 = Sheppard |date = July 2005 |title = Albedos of Asteroids in Comet-Like Orbits |journal = The Astronomical Journal |volume = 130 |issue = 1 |pages = 308–318 |bibcode = 2005AJ....130..308F |doi = 10.1086/430802 |citeseerx = 10.1.1.507.2206 }} }} External links
6 : Trans-Neptunian objects|Damocloids|Unusual minor planets|Discoveries by LONEOS|Slow rotating minor planets|Astronomical objects discovered in 2002 |
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