IAO 2012, Наблюдателен тур, Групи α и β — Задача 12
Вопросы наблюдательного тура. Чистое небо / Observational round. Questions. Clean sky · 16 октомври 2012 г. · 5 т.
В Вашем распоряжении / You are provided with
В Вашем распоряжении фонарик
You are provided with a light
Бележка от източника
The Russian and English columns are parallel versions of the same four live-observation tasks and are retained together. The supplied English grading sheet leaves every value in the Mercury zenith-distance column blank; those blank cells are preserved. The actual observation-end times and telescope observations are not supplied.
Условие
Приблизительно оцените зенитное расстояние Меркурия.
Ответ: __________
Estimate the approximate zenith distance of Mercury.
Answer: __________
Решение
Внимание: Непълно решение
The supplied grading sheet prints the time rows but leaves the entire Mercury zenith-distance value column blank. No numerical observations are supplied.
Zenith distance of Mercury: 5 pt.
Mercury always stays close to the Sun, but RA of it is about , while RA of the Sun is . The combination of the knowledge of the latitude of the site, and the location of the Sun, and at the time when the observation started, it was already well below the horizon.
On October 19, the Zenith distance of Mercury was the following.
| Time | Zenith distance (degree) |
|---|---|
| 21:00 | |
| 21:15 | |
| 21:30 | |
| 21:45 | |
| 22:00 | |
| 22:15 | |
| 22:30 | |
| 22:45 | |
| 23:00 | |
| 23:15 |
If the zenith distance at the time closest to the above table and the answer agree within 15 degree, 5 pt.
For the additional difference at intervals of beyond the ±15 degree, -1 pt was taken off. This means that 0 pt was given if the difference is more than 35 degree.
Время / Time
Максимальное время выполнения задания – 17 минут.
The maximum total time for all tasks is 17 minutes.
Оригинал в Архива: obs.png · официални решения: obssol.png · допълнителни данни: obsdata.png