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・ 121st Ohio General Assembly
・ 121st Ohio Infantry
・ 121st Pennsylvania Infantry
・ 121st Pioneers
・ 121st Regiment of Foot
・ 121st Regiment of Foot (1762)
・ 121st Regiment of Foot (1794)
・ 121st Signal Battalion (United States)
・ 121st SS-Standarte
・ 121st Street (BMT Jamaica Line)
・ 121st Street (IRT Second Avenue Line)
・ 122
・ 122 (number)
・ 122 BC
・ 122 Foregate Street, Chester
122 Gerda
・ 122 iron arsenide
・ 122 Leadenhall Street
・ 122 mm gun M1931 (A-19)
・ 122 mm gun M1931/37 (A-19)
・ 122 mm howitzer 2A18 (D-30)
・ 122 mm howitzer M1909
・ 122 mm howitzer M1909/37
・ 122 mm howitzer M1910
・ 122 mm howitzer M1910/30
・ 122 mm howitzer M1938 (M-30)
・ 122 Squadron (Israel)
・ 122 Squadron SAAF
・ 122-124 Colmore Row
・ 1220


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122 Gerda : ウィキペディア英語版
122 Gerda

122 Gerda is a fairly large outer main-belt asteroid that was discovered by German-American astronomer C. H. F. Peters on July 31, 1872, and named after Gerðr, the wife of the god Freyr in Norse mythology. Based upon its spectrum, this is classified as an S-type asteroid. It is listed as a member of the Hecuba group of asteroids that orbit near the 2:1 mean-motion resonance with Jupiter.〔
Photometric observations of this asteroid in 2007 were used to produce a light curve that showed that Gerda rotates every 10.687 ± 0.001 hours and varied in brightness by 0.16 in magnitude.〔 In 2009, observations at the Organ Mesa Observatory in Las Cruces, New Mexico generated a light curve with a period of 10.712 ± 0.01 hours with a brightness variation of 0.11 ± 0.01 magnitudes. This is compatible with previous studies.〔
==See also==

*List of minor planets: 1–1000

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「122 Gerda」の詳細全文を読む



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