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is a red 2:5 resonant〔 trans-Neptunian object (TNO) discovered on October 9, 2002 by Mike Brown's team at the Palomar Observatory.〔 ==Physical characteristics== has an absolute magnitude (H) of 3.78.〔 It has an estimated diameter of .〔S. Fornasier, E. Lellouch, T. Müller, P. Santos-Sanz, P. Panuzzo, C. Kiss, T. Lim, M. Mommert, D. Bockelée-Morvan, E. Vilenius, J. Stansberry, G.P. Tozzi, S. Mottola, A. Delsanti, J. Crovisier, R. Duffard, F. Henry, P. Lacerda, A. Barucci, & A. Gicquel (2013). (TNOs are Cool: A survey of the trans-Neptunian region. VIII. Combined Herschel PACS and SPIRE observations of 9 bright targets at 70–500 ''µ''m. )〕 Using the Spitzer Space Telescope, it was previously estimated to have a diameter of , which would have made it one of the largest possible dwarf planets. This overestimation was due to insufficient motion to allow for a good sky subtraction and because it was very close to a brighter background object.〔 Brown noted that the Spitzer measurement involved a very large potential error and that the object would likely be smaller, making its chances of it being a dwarf planet "likely" rather than "near certainty", in his opinion. It was predicted that on 30 November 2013, might occult a star for slightly less than a minute.〔(Stevge Preston's Asteroid Occultation Updates item ); accessed 22 February 2013〕 However, the possibility to observe this occultation was judged as small. The precise duration that a Solar System object occults a star provides a precise way to determine its diameter, if observed from multiple locations. The red spectra suggests that has very little fresh ice on its surface.〔 Its rotational period is most likely 5.41 h, and it has a light-curve amplitude of .〔(Short-term variability of 10 trans-Neptunian objects )〕 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「(84522) 2002 TC302」の詳細全文を読む スポンサード リンク
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