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| perihelion = 35.010 AU () | aphelion = 132.87 AU () | eccentricity = | period = 769.12 yr | inclination = 23.965° | asc_node = 217.74° | arg_peri = 184.40° | mean_anomaly = 4.0507° | avg_speed = 2.98 km/s | physical_characteristics = yes | dimensions = 339±20 km〔 ≈ 〔 | mass = | density = | surface_grav = | escape_velocity = | sidereal_day = | spectral_type = | magnitude = 21〔 | abs_magnitude = 5.4〔 | albedo = 〔 〔 | single_temperature= ≈ 31 K }} (also written (15874) 1996 TL66) is a trans-Neptunian object (TNO) that resides in the scattered disc. The Spitzer Space Telescope has estimated this object to be about in diameter,〔 but 2012 estimates from the Herschel Space Observatory estimate the diameter as closer to .〔 It is not a detached object, since its perihelion (closest approach to the Sun) is under the influence of Neptune.〔 Light-curve-amplitude analysis suggests it is a spheroid.〔Tancredi, G., & Favre, S. (2008) (''Which are the dwarfs in the Solar System?'' ). Depto. Astronomía, Fac. Ciencias, Montevideo, Uruguay; Observatorio Astronómico Los Molinos, MEC, Uruguay. Retrieved 10-08-2011〕 Tancredi presents "in the form of a decision tree, the set of questions to be considered in order to classify an object as an icy 'dwarf planet'." They find that is very probably a dwarf planet. Mike Brown's website, using a radiometrically determined diameter of , lists it as a possible dwarf planet. == Discovery == Discovered in 1996 by David C. Jewitt et al., it was the first object to be categorized as a scattered-disk object (SDO), although , discovered a year earlier, was later recognised as a scattered-disk object. It was one of the largest known trans-Neptunian objects at the time of the discovery. It came to perihelion in 2001.〔 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「(15874) 1996 TL66」の詳細全文を読む スポンサード リンク
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