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| discovered = 17 July 2007 | mp_name = | mp_category = SDO〔 3:10 resonance (DES)〔 | orbit_ref = 〔 | epoch = JD 2457000.5 (9 December 2014) | aphelion = 100.66 AU | perihelion = 33.033 AU | semimajor = 66.85 AU | eccentricity = 0.5058 | period = 546.6 yr | avg_speed = | inclination = 30.9376° | asc_node = 336.8153° | mean_anomaly = 103.85° (M) | arg_peri = 206.65° | satellites = | physical_characteristics = yes | dimensions = 〔 〔 | mass = | density = | surface_grav = | escape_velocity = | sidereal_day = 44.81 h | axial_tilt = | pole_ecliptic_lat = | pole_ecliptic_lon = | single_temperature= 31 K〔 | albedo = 〔 | spectral_type = red 〔 | magnitude = 21.8 〔 | abs_magnitude = 2.5 〔 }} is a very large planetoid located in the scattered disc. It is the largest known body in the Solar System without a name.〔 It is approximately the size of and , and is presumably a dwarf planet. In "K2 Science Conference" Robert Szabo wrote - . == Discovery and nickname == was discovered by California Institute of Technology astronomers as part of the PhD thesis of Meg Schwamb, who was at the time a graduate student of Michael E. Brown. Brown nicknamed the object "Snow White" for its presumed white color,〔 as it would have to be very large or very bright to be detected by their survey. It was also the "seventh dwarf" discovered by Brown's team, after Quaoar in 2002, Sedna in 2003, Haumea and Orcus in 2004, and Makemake and Eris in 2005. However, "Snow White" turned out to be one of the reddest objects in the Kuiper belt, comparable only to Quaoar, so the nickname was dropped. is currently the largest known object in the Solar System without an official name. In 2011 Brown decided he finally had enough information to justify giving it one, because the discovery of water ice and the possibility of methane makes it noteworthy enough to warrant further study.〔 However, as of 2015, Brown had yet to propose a name, though he notes that in 2017 anyone will be able to make a proposal.〔(【引用サイトリンク】title=Mike Brown's Planets )〕 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「(225088) 2007 OR10」の詳細全文を読む スポンサード リンク
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