| 词条 | (184212) 2004 PB112 |
| 释义 |
| minorplanet = yes | name = (184212) {{mp|2004 PB|112}} | background = #C2E0FF | image = | image_size = | caption = | discovery_ref = [2] | discovered = 13 August 2004 | discoverer = M. W. Buie | discovery_site = Cerro Tololo Obs. | mpc_name = {{mp|(184212) 2004 PB|112}} | alt_names = {{mp|2004 PB|112}} | pronounced = | named_after = | mp_category = TNO {{·}}SDO 4:27 resonance[4] | orbit_ref = | epoch = 4 September 2017 (JD 2458000.5) | uncertainty = 3 | observation_arc = 8.18 yr (2,986 days) | aphelion = 177.38 AU | perihelion = 35.329 AU | semimajor = 106.35 AU | eccentricity = 0.6678 | period = 1096.82 yr (400,612 days) | mean_anomaly = 1.9877° | mean_motion = {{Deg2DMS|0.0009|sup=ms}} / day | inclination = 15.454° | asc_node = 356.81° | arg_peri = 3.5097° | dimensions = 100–220 km[6] | rotation = | albedo = | spectral_type = | abs_magnitude = 7.2[7]{{·}}7.3 }}{{mp|(184212) 2004 PB|112}}, provisional designation {{mp|2004 PB|112}}, is a resonant trans-Neptunian object from the scattered disc, with a semi-major axis of approximately 110 AU and in a rare orbital resonance ratio with Neptune. It was discovered on 13 August 2004, by American astronomer Marc Buie at the Cerro Tololo Inter-American Observatory in Chile.[2] Orbit and classification{{mp|2004 PB|112}} orbits the Sun at a distance of 35.3–177.4 AU once every 1096 years and 10 months (400,612 days). Its orbit has an eccentricity of 0.67 and an inclination of 15° with respect to the ecliptic. A first precovery was taken at Cerro Tololo in 2000, extending the body's observation arc by 4 years prior to its official discovery observation.[2]{{mp|2004 PB|112}} reached perihelion on 5 October 2011 (JD 2455839.806). It is a 4:27 resonant trans-Neptunian object.[4]{{rp|49}}Physical characteristicsBased on a generic conversion from an absolute magnitude of 7.2, {{mp|2004 PB|112}} measures between 100 and 220 kilometer in diameter.[6] Numbering and namingThis minor planet was numbered by the Minor Planet Center on 20 April 2008.[15] As of 2018, it has not been named.[2] References1. ^1 2 3 4 {{cite web |title = 184212 (2004 PB112) |work = Minor Planet Center |url = https://www.minorplanetcenter.net/db_search/show_object?object_id=184212 |accessdate = 24 April 2017}} [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 = 24 February 2018}} 3. ^1 2 {{cite web |title = Absolute Magnitudes (H) – generic diameter conversion |publisher = NASA/JPL |url = http://neo.jpl.nasa.gov/glossary/h.html |accessdate = 24 April 2017}} 4. ^1 2 {{cite web |author1 = Brett Gladman |author2 = Brian G. Marsden |author3 = Christa VanLaerhoven |title = Nomenclature in the Outer Solar System |url = http://www.lpi.usra.edu/books/ssbn2008/7002.pdf |type = PDF |accessdate = 24 April 2017}} 5. ^1 {{cite web |title = AstDys-2 (184212) 2004 PB112) |url = http://hamilton.dm.unipi.it/astdys/index.php?pc=1.1.0&n=2004+pb112 |accessdate = 24 April 2017}} }} External links
3 : Scattered disc and detached objects|Discoveries by Marc W. Buie|Astronomical objects discovered in 2004 |
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