IAO 2012, Наблюдателен тур, Групи α и β — Задача 10
Вопросы наблюдательного тура. Чистое небо / Observational round. Questions. Clean sky · 16 октомври 2012 г. · 6 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
Расположите NGC 869 и NGC 884 в поле зрения телескопа.
После нахождения объектов покажите их экзаменатору.
Place NGC 869 and NGC 884 in the field of view of the telescope.
After identifying the objects, show them to the examiner.
10.2.
Оцените часовой угол этих объектов (с точностью ± 10 градусов).
Estimate the current hour angle of them (to ± 10 degree accuracy).
Ответ в градусах: __________
Answer in degrees: __________
Решение
NGC869/884 (The Perseus double cluster): 6 pt.
10-1. (3 т.)
If the cluster is in the field of view of the telescope, 3 pt. If not, 0 pt
10-2. (3 т.)
Hour angle of the double cluster
| Time | Hour angle |
|---|---|
| 21:00 | -60 or 300 degree |
| 22:00 | -45 or 315 degree |
| 23:00 | -30 or 330 degree |
4 min shift = 1 degree shift
The end time of the exam for each group was recorded.
If the hour angle at the end time and the answer agree within ±10 degree, 3 pt.
If the difference is more than ±10 degree, -1 pt for each interval of an additional difference of . This means that 0 pt for the answer with more than ±20 degree offset.
If two answers were given for each object with separation more than 1 degree, 0 pt.
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