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描述 Galileo highest-res image asteroid Ida's moon (See below for details).
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来源 https://solarsystem.nasa.gov/galleries/dactyl
作者 NASA/JPL
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Public domain 本文件完全由NASA创作,在美国属于公有领域。根据NASA的版权方针,NASA的材料除非另有声明否则不受版权保护。(参见Template:PD-USGov/zhNASA版权方针页面JPL图片使用方针。)
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摘要

Original description from NASA:

Galileo highest-res image asteroid Ida's moon

This image is the most detailed picture of the recently discovered natural satellite of asteroid 243 Ida taken by the Galileo spacecraft's solid-state imaging camera during its encounter with the asteroid on August 28, 1993. Shuttered through the camera's broadband clear filter as part of a 30-frame mosaic designed to image the asteroid itself, this frame fortuitously captured the previously unknown moon at a range of about 3,900 kilometers (2,400 miles), just over 4 minutes before the spacecraft's closest approach to Ida. Each picture element spans about 39 meters (125 feet) on the surface of the moon.

More than a dozen craters larger than 80 meters (250 feet) in diameter are clearly evident, indicating that the moon has suffered numerous collisions from smaller solar system debris during its history. The larger crater on the terminator is about 300 meters (1,000 feet) across. The satellite is approximately egg-shaped, measuring about 1.2 by 1.4 by 1.6 kilometers (0.75 by 0.87 by 1 mile). At the time this image was shuttered, Ida was about 90 kilometers (56 miles) away from the moon, outside this frame to the left and slightly below center. This image was relayed to Earth from Galileo on June 8, 1994.

The Galileo project, whose primary mission is the exploration of the Jupiter system in 1995-97, is managed for NASA's Office of Space Science by the Jet Propulsion Laboratory.

P-44297 June 27, 1994

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当前2018年4月2日 (一) 04:372018年4月2日 (一) 04:37版本的缩略图892 × 841(385 KB)PlanetUserCropped 20 % horizontally and 20 % vertically using CropTool with precise mode.
2017年12月12日 (二) 19:352017年12月12日 (二) 19:35版本的缩略图1,115 × 1,051(597 KB)NewoneBetter version
2010年5月25日 (二) 23:042010年5月25日 (二) 23:04版本的缩略图240 × 240(16 KB)Antonsusi{{PD-USGov-NASA}}

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