| 词条 | 2010 JO179 |
| 释义 |
| minorplanet = yes | name = {{mp|2010 JO|179}} | background = #C2E0FF | image = | image_size = | caption = | discovery_ref = [1][2] | discoverer = Pan-STARRS 1 | discovery_site = Haleakala Obs. | discovered = 10 May 2010 {{small|(first observed only)}} | mpc_name = {{mp|2010 JO|179}} | alt_names = | pronounced = | named_after = | mp_category = TNO {{·}}5:21 res [4] SDO [5][6]{{·}}distant [1] p-DP [8] | orbit_ref = | epoch = 23 March 2018 (JD 2458200.5) | uncertainty = 3 {{·}}1 [1] | observation_arc = 11.22 yr (4,098 days) | aphelion = 119.04 AU | perihelion = 39.562 AU | semimajor = 79.303 AU | eccentricity = 0.5011 | period = 706.22 yr (257,947 d) | mean_anomaly = 33.623° | mean_motion = {{Deg2DMS|0.0014|sup=ms}} / day | inclination = 32.041° | asc_node = 147.16° | arg_peri = 10.771° | mean_diameter = 598 km[8] {{val|600|-|900}} km[4] 702 km[5] | rotation = 30.6 h[4] | albedo = 0.09 {{small|(assumed)}}[5] 0.10 {{small|(estimated)}}[8] | spectral_type = G–R = {{val|0.88|0.21}} {{small|(red)}}[4] | abs_magnitude = {{val|3.4|0.1}}[4] 3.9803 4.3[8] }}{{mp|2010 JO|179}} is a high-order resonant trans-Neptunian object and a likely dwarf-planet candidate from the outermost regions of the Solar System, approximately 700 kilometers in diameter.[4] Long-term observations suggest that the object is in a meta-stable 5:21 resonance with Neptune.[4] Other sources classify it as a scattered disc object.[5][6] First observation and orbitThe Minor Planet Center credits the object's first official observation on 10 May 2010 to Pan-STARRS ({{small|F51}}) at Haleakala Observatory, Hawaii, United States.[1][2] The observations were made by Pan-STARRS{{'}} Outer Solar System Survey.[4] {{mp|2010 JO|179}} orbits the Sun at a distance of 39.5–119 AU once every 706 years and 1 month (semi-major axis of 79.3 AU). Its orbit has a high eccentricity of 0.50 and an inclination of 32° with respect to the ecliptic.Physical characteristicsPhotometryPhotometric observations of {{mp|2010 JO|179}} gave a monomodal lightcurve with slow rotation period of 30.6 hours, suggesting a rather spherical shape with significant albedo patchiness. An alternative period solution of a bimodal lightcurve is considered less likely. It would double the period and imply an ellipsoidal shape with an axis-ratio of at least 1.58.[4] Diameter and albedoThe object's mean diameter has been estimated to measure 598 and 702 kilometers with an assumed albedo of 0.10 and 0.09, respectively,[5][8] while the discoverers estimate a diameter of 600–900 kilometers.[4] In his classification scheme, astronomer Michael Brown considers this object a likely dwarf planet, rather than a "highly likely" one, as his diameter-estimate is just below the 600-kilometer mark.[8] Numbering and namingAs of 2018, this minor planet has not been numbered or named.[1] References1. ^1 2 3 4 5 {{cite web |title = 2010 JO179 |work = Minor Planet Center |url = http://www.minorplanetcenter.net/db_search/show_object?object_id=2010+JO179 |accessdate = 21 February 2018}} [1][2][3][4][5][6]2. ^1 2 {{cite web |title = MPEC 2017-S54 : 2010 JO179 |work = Minor Planet Center |date = 18 September 2017 |url = https://minorplanetcenter.net/mpec/K17/K17S54.html |accessdate = 21 February 2018}} 3. ^1 2 3 4 5 6 7 8 9 10 {{Cite arxiv |display-authors = 6 |first1 = Matthew J. |last1 = Holman |first2 = Matthew J. |last2 = Payne |first3 = Wesley |last3 = Fraser |first4 = Pedro |last4 = Lacerda |first5 = Michele T. |last5 = Bannister |first6 = Michael |last6 = Lackner |first7 = Ying-Tung |last7 = Chen |first8 = Hsing Wen |last8 = Lin |first9 = Kenneth W. |last9 = Smith |first10 = Rositako |last10 = Kotanekova |first11 = David |last11 = Young |first12 = K. |last12 = Chambers |first13 = S. |last13 = Chastel |first14 = L. |last14 = Denneau |first15 = A. |last15 = Fitzsimmons |first16 = H. |last16 = Flewelling |first17 = Tommy |last17 = Grav |first18 = M. |last18 = Huber |first19 = Nick |last19 = Induni |first20 = Rolf-Peter |last20 = Kudritzki |first21 = Alex |last21 = Krolewski |first22 = R. |last22 = Jedicke |first23 = N. |last23 = Kaiser |first24 = E. |last24 = Lilly |first25 = E. |last25 = Magnier |first26 = Zachary |last26 = Mark |first27 = K. J. |last27 = Meech |first28 = M. |last28 = micheli |first29 = Daniel |last29 = Murray |first30 = Alex |last30 = Parker |first31 = Pavlos |last31 = Protopapas |first32 = Darin |last32 = Ragozzine |first33 = Peter |last33 = Veres |first34 = R. |last34 = Wainscoat |first35 = C. |last35 = Waters |first36 = R. |last36 = Weryk |date = September 2017 |title = A dwarf planet class object in the 21:5 resonance with Neptune |eprint = 1709.05427 |class = astro-ph.EP}} 4. ^1 2 3 4 5 6 {{cite web |title = How many dwarf planets are there in the outer solar system? |publisher = California Institute of Technology |author = Michael E. Brown |url = http://web.gps.caltech.edu/~mbrown/dps.html |accessdate = 15 December 2017}} 5. ^1 2 3 4 5 {{cite web |title = List of Known Trans-Neptunian Objects |work = Johnston's Archive |date = 15 October 2017 |author = Johnston, Wm. Robert |url = http://www.johnstonsarchive.net/astro/tnoslist.html |accessdate = 15 December 2017}} 6. ^1 2 {{cite web |title = List Of Centaurs and Scattered-Disk Objects |work = Minor Planet Center |url = http://www.minorplanetcenter.org/iau/lists/Centaurs.html |accessdate = 15 December 2017}} }} External links
7 : Trans-Neptunian objects|Scattered disc and detached objects|5:21 resonance|Minor planet object articles (unnumbered)|Discoveries by Pan-STARRS|Possible dwarf planets|Astronomical objects discovered in 2010 |
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