天王星環
维基百科,自由的百科全书
旅行家2號在1986年飛越天王星時,拍攝了天王星的環,2005年又新發現了兩道環。
名稱 | 與天王星中心的距離(公里) | 寬度(公里) |
1986 U2R | 38,000 | 2,500? |
Ring 6 | 41,840 | 1-3 |
Ring 5 | 42,230 | 2-3 |
Ring 4 | 42,580 | 2-3 |
Alpha Ring | 44,720 | 7-12 |
Beta Ring | 45,670 | 7-12 |
Eta Ring | 47,190 | 0-2 |
Gamma Ring | 47,630 | 1-4 |
Delta Ring | 48,290 | 3-9 |
1986 U1R | 50,020 | 1-2 |
Epsilon Ring | 51,140 (shepherded by Cordelia and Ophelia) |
20-100 |
R/2003 U 2 | ~66,000 (near Portia) | ? |
R/2003 U 1 | 97,734 (at Mab) | ? |
[编辑] 參考資料
- News Article: More Rings Are Found Around Planet Uranus
- Hubble Discovers Giant Rings and New Moons Encircling Uranus – Hubble Space Telescope news release (2005-12-22)