發信人: yaohua2000 (周濟是豬), 信區: Astronomy 標 題: 土星已發現的衛星數目增至46顆 發信站: 水木社區 (Wed May 4 23:54:20 2005), 站內 http://news.bbc.co.uk/1/hi/sci/tech/4511715.stm (NOTE: 上面這個URL已被封禁，請使用某些適當的技術手段輔助瀏覽) 12顆新發{的土星衛星： S/2004 S 7 S/2004 S 8 S/2004 S 9 S/2004 S 10 S/2004 S 11 S/2004 S 12 S/2004 S 13 S/2004 S 14 S/2004 S 15 S/2004 S 16 S/2004 S 17 S/2004 S 18 -- ※ 修改:﹒yaohua2000 于 May 4 23:55:18 修改本文﹒[FROM: 218.68.248.*] ※ 來源:﹒水木社區 newsmth.net﹒[FROM: 218.68.248.*] 發信人: yaohua2000 (周濟是豬), 信區: Astronomy 標 題: Re: 土星已發現的衛星數目增至46顆 發信站: 水木社區 (Thu May 5 00:07:30 2005), 站內 Twelve New Moons for Saturn May 3, 2005 With the powerful Cassini orbiter in place at Saturn, it's easy to forget that scientists can still study the ringed planet from the Earth. But astronomers at the University of Hawaii have followed up on many previous moon discoveries with a dozen new satellites at Saturn, bringing the total count to 46. The satellites were discovered on December 12, 2004 using the 8.2-meter (27-foot) Subaru telescope on Mauna Kea. They were confirmed in observations conducted from January through March using Subaru and the 8-meter (26-foot) Gemini North telescope. Unlike the moons recently discovered by Cassini, which are closely associated with Saturn's ring system, these 12 new moons are "irregular" satellites. They orbit very far from Saturn (around 20 million kilometers or 12 million miles away), and have inclined, elliptical orbits. All but one orbit Saturn in a retrograde fashion, opposite to the direction that Saturn's larger moons and rings travel around the giant planet. Here are the basic facts about the 12 new moons. All are approximately 5 kilometers (3 miles) in diameter. -- Provisional name Distance from Saturn (km) Orbit inc (deg) Orbit ecc S/2004 S07 19,800,000 165.1 0.580 S/2004 S08 22,200,000 168.0 0.213 S/2004 S09 19,800,000 157.6 0.235 S/2004 S10 19,350,000 167.0 0.241 S/2004 S11 16,950,000 41.0 0.336 S/2004 S12 19,650,000 164.0 0.401 S/2004 S13 18,450,000 167.4 0.273 S/2004 S14 19,950,000 162.7 0.292 S/2004 S15 18,750,000 156.9 0.180 S/2004 S16 22,200,000 163.0 0.135 S/2004 S17 18,600,000 166.6 0.259 S/2004 S18 19,650,000 147.4 0.795 【 在 yaohua2000 (周濟是豬) 的大作中提到: 】 : http://news.bbc.co.uk/1/hi/sci/tech/4511715.stm : (NOTE: 上面這個URL已被封禁，請使用某些適當的技術手段輔助瀏覽) : 12顆新發現的土星衛星： : ................... -- ※ 修改:﹒yaohua2000 于 May 5 00:07:52 修改本文﹒[FROM: 218.68.248.*] ※ 來源:﹒水木社區 newsmth.net﹒[FROM: 218.68.248.*] 發信人: yaohua2000 (周濟是豬), 信區: Astronomy 標 題: Re: 土星已發現的衛星數目增至46顆 發信站: 水木社區 (Thu May 5 00:09:15 2005), 站內 截至目前為止： 水星：0 金星：0 地球：1 火星：2 木星：63 土星：46 天王星：27 海王星：13 冥王星：1 TOTAL：153 【 在 yaohua2000 (周濟是豬) 的大作中提到: 】 : Twelve New Moons for Saturn : May 3, 2005 : With the powerful Cassini orbiter in place at Saturn, it's easy to forget : ................... -- ※ 來源:﹒水木社區 newsmth.net﹒[FROM: 218.68.248.*] --

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