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Félix Aguilar Obs. | mp_name = 1991 Darwin | alt_names = 1967 JL1954 UG | named_after = Charles Darwin George Darwin〔 | mp_category = main-belt | orbit_ref = 〔 | epoch = 27 June 2015 (JD 2457200.5) | uncertainty = 0 | observation_arc = | aphelion = 2.7164 AU | perihelion = 1.7803 AU | semimajor = 2.2484 AU | eccentricity = 0.2081 | period = 3.37 yr (1,231 days) | mean_anomaly = 44.596° | inclination = 5.9196° | asc_node = 328.47° | arg_peri = 345.59° | moid = 0.7672 AU | dimensions = | rotation = 4.7 h | albedo = | spectral_type = | abs_magnitude = 13.4 }} 1991 Darwin, provisional designation 1967 JL, is a main-belt asteroid discovered on May 6, 1967 by Argentine astronomers Carlos Cesco and Arnold Klemola at the El Leoncito, Yale–Columbia Southern Station, Félix Aguilar Observatory in Argentina.〔 The rather eccentric asteroid orbits the Sun at a distance of 1.8–2.7 AU once every 3 years and 4 months. It has a rotation period of 4.7 hours.〔 The asteroid is named in memory of famous English naturalist Charles Darwin (1809–1882), first to established the theory of biological evolution. While on research in Argentina, he crossed the Andes relatively near to the Leoncito Astronomical Complex where the minor planet has been discovered. The asteroid also honors George Darwin (1845–1912), his second son who was a noted astronomer for his pioneering application of detailed dynamical analyses to problems of cosmogony and geology. The Darwins are also honored by the lunar and Martian craters ''Darwin''.〔 == References == 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「1991 Darwin」の詳細全文を読む スポンサード リンク
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