The central eclipse track begins at 18:54 UT as a 28 kilometre wide annular path with a duration of 28 seconds. However, the path quickly narrows to 0 kilometres within the first 13 minutes of its trajectory some 2200 kilometres south of Tahiti. Continuing along its northeastern course, the path is now total as it rapidly expands in width. Unfortunately, no Pacific islands of any size fall within the path of totality. At 19:48 UT, the umbral shadow passes north and just grazes Oeno Island (near Pitcarn). The 21 kilometre wide path now has a central duration of 31 seconds with the Sun 56° above the horizon.
At greatest eclipse 2 (20:35:46 UT), the duration of totality is 42 seconds and the path width is 27 kilometres. As the shadow proceeds along its watery trajectory, the path begins to narrow as the length of totality decreases. The path becomes annular again at 22:00 UT about 800 kilometres due north of the Galapagos Islands and 900 kilometres west of Central America. By the time the shadow reaches the coast of Costa Rica (22:09 UT), the annular phase will already be 12 seconds and growing. The track width increases from 11 to 33 kilometres as it sweeps across Panama, Columbia, and Venezuela. Finally the central path ends in Venezuela where a 33 seconds annular eclipse will occur at sunset (22:18 UT). Over the course of 3 hours and 24 minutes, the Moon's central shadow traverses a 14,200 kilometre long track covering a scant 0.06% of the Earth's surface area.
摘自NASA Eclipse Home Page |
置顶卡
变色卡
千斤顶
显身卡