IAO 2016, Наблюдения — Задача 10. Task 10

2016 IAO observational round – question sheet · 5 т.

Внимание: Бележка към темата

Task 12 requires a video clip that is not present in the supplied archive PDFs. Its printed official answer is available below.

2016 IAO observational round – question sheet

Duration: 40 min (tasks 8-11) + 6 min (task 12)

Условие

The diagram (Fig.3) shows how the altitude of three stars above the horizon changes during a night near the winter solstice as observed from the Rozhen observatory (41°41′N, 24°44′E). The one-digit numbers on the chart are the numbers of the stars, while the two-digit numbers are angular distances from the moon in degrees.

Altitude versus time diagram (altitude 0°–90° on the left axis, airmass on the right axis, UT and local time on the horizontal axis from 15h to 5h) with sunset at 15h 0m, twilight at 16h33m and 4h 3m, sunrise at 5h35m; three curves marked with star numbers 1, 2, 3 (magenta) and angular distances from the Moon in degrees (blue two-digit numbers); two vertical solid lines near 22 and 24 UT.
Fig. 3

10.1. What are the equatorial coordinates of the three stars?

Star 1: α=\alpha = _________ h δ=\delta = ________ deg

Star 2: α=\alpha = _________ h δ=\delta = ________ deg

Star 3: α=\alpha = _________ h δ=\delta = ________ deg [3 т.]

10.2. How many days after the preceding new moon is this night?

Answer: t=t = ________ d [2 т.]

Решение

Теми и трудност

Трудност: неоценена.

Небесна сфера и сферична астрономия · Слънчева система · Небесни координати · Звездни карти и съзвездия · Лунни фази и видимост · Денонощно движение и видимост

Предпоставки: Гимназиална подготовка, Разширена олимпиадна подготовка

Оригинал в Архива: observational_original.pdf · официални решения: obssol.pdf