| 词条 | (523687) 2014 DF143 |
| 释义 |
| minorplanet = yes | name = {{mp|(523687) 2014 DF|143}} | background = #C2E0FF | image = | image_size = | caption = | discovery_ref = [1] | discovered = April 12 2011 | discoverer = Pan-STARRS 1 | discovery_site = Haleakalā Obs. | mpc_name = (523687) 2014 DF143 | alt_names = {{mp|2014 DF|143}} | pronounced = | named_after = | mp_category = {{nowrap|TNO {{·}}p-DP [3] cubewano [4]}}{{·}}(hot) | orbit_ref = | epoch = 27 April 2019 (JD 2458600.5) | uncertainty = 2{{·}}1[1] | observation_arc = 16.19 yr (5,912 d) | aphelion = 44.783 AU | perihelion = 40.876 AU | semimajor = 42.829 AU | eccentricity = 0.0456 | period = 280.30 yr (102,379 d) | mean_anomaly = 92.056° | mean_motion = {{Deg2DMS|0.0035|sup=ms}} / day | inclination = 23.681° | asc_node = 35.614° | arg_peri = 73.516° | mean_diameter = {{val|352|ul=km}} {{small|(est.)}}[4] {{val|358|u=km}} {{small|(est.)}}[3] | rotation = | albedo = {{val|0.08}} {{small|(assumed)}}[3] {{val|0.09}} {{small|(assumed)}}[4] | spectral_type = | abs_magnitude = 5.5[1] }} {{mp|(523687) 2014 DF|143}}, provisional designation {{mp|2014 DF|143}}, is a trans-Neptunian object and cubewano from the Kuiper belt, located in the outermost region of the Solar System. It was discovered on 13 March 2011, by astronomers with the Pan-STARRS survey at Haleakala Observatory, Hawaii, United States.[1] The classical Kuiper belt object belongs to the hot population and is a dwarf planet candidate, as it measures approximately {{convert|350|km|mi|abbr=off|sigfig=2|sp=us}} in diameter. Orbit and classification{{mp|2014 DF|143}} orbits the Sun at a distance of 40.9–44.8 AU once every 280 years and 4 months (102,379 days; semi-major axis of 42.83 AU). Its orbit has an eccentricity of 0.05 and an inclination of 24° with respect to the ecliptic. It has an orbital uncertainty of 1–2.[1] The object's observation arc begins with a precovery taken by the Sloan Digital Sky Survey in March 2002, 9 years prior to its official discovery observation at Haleakala Observatory in March 2011.[1]{{mp|2014 DF|143}} is a cubewano, a classical, low-eccentricity object in the Kuiper belt, located in between the two prominent resonant populations of the plutinos and twotinos. Due to its relatively high inclination, this cubewano belongs to the "stirred" hot population rather than to the larger cold population.Numbering and namingThis minor planet was numbered by the Minor Planet Center on 25 September 2018 and received the number {{LoMP|523687|523687}} in the minor planet catalog ({{small|M.P.C. 111779}}).[18] As of 2018, it has not been named.[1] Physical characteristicsAccording to the American astronomer Michael Brown, {{mp|2014 DF|143}} measures 358 kilometers in diameter based on an assumed albedo of 0.08.[3] On his website, Michael Brown lists this object as a "possible" dwarf planet (200–400 km), which is the category with the lowest certainty in his 5-class taxonomic system.[3] Similarly, Johnston's archive estimates a diameter 352 kilometers using an albedo of 0.09.[4] As of 2018, no spectral type and color indices, nor a rotational lightcurve have been obtained from spectroscopic and photometric observations. The body's color, rotation period, pole and shape remain unknown.[24] References1. ^1 2 3 4 5 6 7 {{cite web |title = 523687 (2014 DF143) |work = Minor Planet Center |url = https://www.minorplanetcenter.net/db_search/show_object?object_id=523687 |accessdate = 30 November 2018}} [1][2][3][4][5]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 = 30 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 = 30 November 2018}} 4. ^1 2 3 4 5 {{cite web |title = How many dwarf planets are there in the outer solar system? |publisher = California Institute of Technology |last = Brown |first= Michael E. |url = http://web.gps.caltech.edu/~mbrown/dps.html |accessdate = 29 November 2018}} 5. ^1 {{cite web |title = LCDB Data for (495603) |publisher = Asteroid Lightcurve Database (LCDB) |url = http://www.minorplanet.info/PHP/GenerateALCDEFPage_Local.php?AstInfo=523687%7C |accessdate = 29 November 2018}} }} External links
4 : Classical Kuiper belt objects|Discoveries by Pan-STARRS|Possible dwarf planets|Astronomical objects discovered in 2011 |
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