瓦勒西上空的国际太空站
影像来源与版权:Richard Addis

说明:在3月28日的日落后,从英格兰默西河口的瓦勒西市看出去,国际太空站从西方地平面升起。当时约在地球上空400公里处,仍在阳光中闪烁生辉的快速移动国际太空站,受到一座手控的小型后院望远镜,与高幅率的数位相机之追踪。在国际太空站可目视的7分钟飞越期间,总共拍摄了2500幅影格,其中100幅记录到国际太空站的身影。上面这张集合其中最佳的四幅影格,无比清晰的呈现低地球轨道上的国际太空站。在它轨迹的最高点附近,仰角约60度时,国际太空站比天空中最亮的恒星还要亮,而且离取像的瓦勒西后院只有468公里远。
翻译:“每日一天文图”成大物理分站

ISS from Wallasey
Image Credit & Copyright: Richard Addis

Explanation: After sunset on March 28, the International Space Station climbed above the western horizon, as seen from Wallasey, England at the mouth of the River Mersey. Still glinting in the sunlight some 400 kilometers above planet Earth, the fast moving ISS was followed by hand with a small backyard telescope and high frame rate digital camera. A total of 2500 frames were recorded during the 7 minute long visible ISS passage and 100 of them captured images of the space station. These are the four best frames showing remarkable details of the ISS in low Earth orbit. Near the peak of its track, about 60 degrees above the horizon, the ISS was brighter than the brightest star in the sky and as close as 468 kilometers to the Wallasey backyard.
Astronomy Picture of the Day 04/06/2019