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1139 Atami
1139 Atami is a Mars-crossing asteroid orbiting the Sun. It makes a revolution around the Sun once every 3 years. It completes one rotation once every 27 hours. It was discovered by Okuro Oikawa and Kazuo Kubokawa on December 1, 1929.〔 It is named after a harbor near Tokyo, Japan. Its provisional designation was 1929 XE. ==Binary system== Photometric and Arecibo echo spectra observations in 2005 confirmed a satellite orbiting at least from the primary. Due to the similar size of the primary and secondary the Minor Planet Center lists this as a binary companion.
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「1139 Atami」の詳細全文を読む
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