File:PIA22419-Neowise-1stFourYearsDataFromDec2013-20180420.gif
PIA22419-Neowise-1stFourYearsDataFromDec2013-20180420.gif (730 × 548像素,文件大小:3.54 MB,MIME类型:image/gif、循环、47帧、4.7秒)
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摘要
[编辑]描述PIA22419-Neowise-1stFourYearsDataFromDec2013-20180420.gif |
This movie shows the progression of NASA's Near-Earth Object Wide-field Survey Explorer (NEOWISE) investigation for the mission's first four years following its restart in December 2013. Green dots represent near-Earth objects. Gray dots represent all other asteroids which are mainly in the main asteroid belt between Mars and Jupiter. Yellow squares represent comets. Since the mission was restarted in December 2013, after a period of hibernation, the asteroid- and comet-hunter has completely scanned the skies nearly eight times and has observed and characterized 29,375 objects in four years of operations. This total includes 788 near-Earth objects and 136 comets since the mission restart. JPL manages NEOWISE for NASA's Science Mission Directorate at the agency's headquarters in Washington. The Space Dynamics Laboratory in Logan, Utah, built the science instrument. Ball Aerospace & Technologies Corp. of Boulder, Colorado, built the spacecraft. Science operations and data processing take place at the Infrared Processing and Analysis Center at the California Institute of Technology in Pasadena. Caltech manages JPL for NASA. |
日期 | (published) |
来源 | Catalog page · Full-res (GIF) |
作者 | NASA/JPL-Caltech/PSI |
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This media is a product of the Near-Earth Object Wide-field Survey Explorer Credit and attribution belongs to the mission team, if not already specified in the "author" row |
许可协议
[编辑]Public domainPublic domainfalsefalse |
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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/zh、NASA版权方针页面或JPL图片使用方针。) | ![]() |
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当前 | 2018年5月15日 (二) 21:43 | ![]() | 730 × 548(3.54 MB) | Huntster(留言 | 贡献) | Removing excess dead space. Cropped 48 % horizontally, 30 % vertically using CropTool with gif mode. |
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