https://www.astro-init.top/index.php?action=history&feed=atom&title=2020%E5%B9%B4GeCAA%E7%90%86%E8%AE%BA%E7%AC%AC7%E9%A2%98-%E6%B5%81%E6%98%9F%E9%9B%A8%E8%BE%90%E5%B0%84%E7%82%B9 2026-05-04T06:25:47Z 本wiki的该页面的版本历史 MediaWiki 1.32.2 https://www.astro-init.top/index.php?title=2020%E5%B9%B4GeCAA%E7%90%86%E8%AE%BA%E7%AC%AC7%E9%A2%98-%E6%B5%81%E6%98%9F%E9%9B%A8%E8%BE%90%E5%B0%84%E7%82%B9&diff=2035&oldid=prev 2021-06-30T02:20:50Z

<p>创建页面，内容为“==英文题目== A stargazer in Chiayi, Chinese Taipei (23.5°N, 120.4°E, GMT+8) saw two meteors streaking through the sky at 21:00 (Chinese Taipei time) on 25th S…”</p> <p><b>新页面</b></p><div>==英文题目==<br /> <br /> A stargazer in Chiayi, Chinese Taipei (23.5°N, 120.4°E, GMT+8) saw two meteors streaking<br /> through the sky at 21:00 (Chinese Taipei time) on 25th September 2020. One of the<br /> meteors appeared at horizon exactly due west and streaked to a point at 15° altitude<br /> directly above the northern horizon. The second meteor originated at an altitude of 23.5°<br /> and an azimuth of 210° and ended at an altitude of 75° and an azimuth of 255°.<br /> <br /> (a) (6 points) What is the Local Sidereal Time (LST) at the time of observation?<br /> <br /> (b) (16 points) Find the alt-az coordinates of the apparent radiant of the two meteors.<br /> <br /> (c) (6 points) Find the equatorial coordinates of the apparent radiant.<br /> <br /> (d) (2 points) Which of the following constellations is closest to the radiant?<br /> <br /> Crux / Dorado / Pavo / Tucana / Triangulum Australes<br /> <br /> (choose one and write the same name in the answer box)<br /> <br /> Notes:<br /> <br /> • Azimuths are measured from the North (0°) towards the East.<br /> <br /> • The Greenwich Sidereal Time (GST) at 00:00 UT on 1st January 2020 is 6h 40m<br /> 30s.<br /> <br /> ==中文翻译==<br /> <br /> ==官方解答==</div>

Jingsong Guo