https://www.astro-init.top/index.php?action=history&feed=atom&title=2015IOAA%E7%90%86%E8%AE%BA%E7%9F%AD%E9%97%AE%E9%A2%98%E7%AC%AC3%E9%A2%98-%E5%B0%8F%E8%A1%8C%E6%98%9F%E6%8E%A9%E6%98%9F2015IOAA理论短问题第3题-小行星掩星 - 版本历史2026-05-05T11:43:40Z本wiki的该页面的版本历史MediaWiki 1.32.2https://www.astro-init.top/index.php?title=2015IOAA%E7%90%86%E8%AE%BA%E7%9F%AD%E9%97%AE%E9%A2%98%E7%AC%AC3%E9%A2%98-%E5%B0%8F%E8%A1%8C%E6%98%9F%E6%8E%A9%E6%98%9F&diff=2167&oldid=prev某九流辣鸡民科：创建页面，内容为“==英文题目== On 27 May 2015 at 02:18:49, the occultation of the star HIP 89931 (𝛿 −Sgr) by the asteroid 1285 Julietta was observed from Borobudur temple, wh…”2022-03-18T12:19:40Z<p>创建页面，内容为“==英文题目== On 27 May 2015 at 02:18:49, the occultation of the star HIP 89931 (𝛿 −Sgr) by the asteroid 1285 Julietta was observed from Borobudur temple, wh…”</p>
<p><b>新页面</b></p><div>==英文题目==<br />
On 27 May 2015 at 02:18:49, the occultation of the star HIP 89931 (𝛿 −Sgr) by the asteroid 1285 Julietta was observed from Borobudur temple, which was located at the center of the asteroid shadow path. It lasted for only 6.201 s. Assume that Earth’s orbit is circular and the orbit of Julietta is on the ecliptic plane and revolves in the same direction as Earth. At the occultation, Julietta is near its aphelion. At the time of the occultation the distances of Julietta from the Sun and the Earth are 3.076 AU and 2.156 AU respectively. Find the approximate diameter of asteroid Julietta, if the semi major axis of Julietta is 𝑎 = 2.9914 AU.</div>某九流辣鸡民科