IOAA 2013, Отборен тур, хоризонтални въпроси — Задача 11. K

IOAA 2013 — Team Competition: Horizontal questions · 17 т.

Условие

i. Two stars have angular separation of 13.84 arcsec. We are photographing them with a f/10 telescope with a diameter of 20 cm. What is their linear separation on the photograph in micrometers? (integer) [4 т.]

ii. Grimaldi, Plato, Tycho, Eratosthenes [4 т.]

iii. How many degrees under the horizon is the centre of the Sun when the Astronomical Twilight ends? [2 т.]

iv. The mission of Apollo __ was aborted after an oxygen tank exploded on the way to the Moon. [2 т.]

v. If the Observatory Factor is 0.95, what is the Wolf Number if the number of sunspot groups is 13 and the number of individual spots is 14? (integer) [3 т.]

vi. A star is 100pc away. Its Apparent Visual Magnitude is $m_V$=13.0mag, its Apparent Photographic Magnitude is $m_{pg}$=14.6mag and its Absolute Visual Magnitude is $M_v$=4.7mag. What is its Colour Excess? Consider that $A_V = 3\times E_{B-V}$, where $E_{B-V}$ is the Colour Excess and $A_V$ is the Visual Absorption. (one decimal) [2 т.]

Отговори

Решение

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Оригинал в Архива: Horizontal_questions.pdf