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・ 21 Ángeles (TransMilenio)
・ 21-87
・ 21-gun salute
・ 21-Hydroxylase
・ 21-hydroxysteroid dehydrogenase (NAD+)
・ 21-hydroxysteroid dehydrogenase (NADP+)
・ 21-Two One-
・ 21... Ways to Grow
・ 210
・ 210 (number)
・ 210 BC
・ 210 Isabella
・ 210 mm gun M1939 (Br-17)
・ 210 Squadron (Israel)
・ 210 Trade
2100 Ra-Shalom
・ 2100 Ross Avenue
・ 2100 series
・ 2101 Adonis
・ 2102 Tantalus
・ 2104 Toronto
・ 21062 Iasky
・ 21064 Yangliwei
・ 210s
・ 210s BC
・ 210th
・ 210th Battalion (Frontiersmen), CEF
・ 210th Coastal Defense Division (Wehrmacht)
・ 210th Coastal Division (Italy)
・ 210th Field Artillery Brigade


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2100 Ra-Shalom : ウィキペディア英語版
2100 Ra-Shalom
The asteroid 2100 Ra-Shalom was discovered in 1978 by Eleanor F. Helin. It was the second asteroid in the Aten class, after the discovery of 2062 Aten in 1976, also by Helin. The Atens have a semi-major axis of less than 1 AU; of the Atens, Ra-Shalom is one of the asteroids with the smallest semi-major axes: just 0.832 AU. It comes within 30 Gm of Mars, Earth, Venus, and Mercury. The closest approaches are to Mercury, to about 0.0784 AU (11.7 Gm).〔 In 1981, this object was detected using radar, revealing a relatively smooth surface at decimeter scales.〔
The name of the asteroid, which refers to the Egyptian god Ra and the Hebrew word Shalom, refers to the Camp David Peace Accords between Egypt and Israel.
==References==




抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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