IOAA 2013, Отборен тур, хоризонтални въпроси — Задача 3. C

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

Условие

i. Difference between sidereal time of two places is 2h 47m 24s2^{h}\ 47^{m}\ 24^{s}. The difference in their longitude is (in deg and min). [4 т.]

ii. A galaxy in the constellation Triangulum is M_. [2 т.]

iii. Pluto’s moons. [1 т.]

iv. The Beehive Cluster is M_. [2 т.]

Star chart of the constellation Cancer with neighbouring Leo Minor, Lynx, Gemini, Leo, Canis Minor and Hydra; the ecliptic is drawn in blue; a red arrow points to a yellow-marked cluster between Asellus Borealis and Asellus Australis; M67 near Acubens is also marked.

v. Tidal forces are proportional to R−nR^{-n}. Value of n is [1 т.]

vi. Proxima Centauri is 4.243ly distant. It has apparent magnitude of 11.5mag and approaches Earth at 21.7km/s. After how many thousands of years will it be visible to the naked eye? (integer) [2 т.]

vii. Cassini Division, D Ring, Encke Gap, A Ring [4 т.]

Colour image of Saturn and its rings with yellow numbered labels 1 to 9 pointing to ring features, gaps and parts of the planet (3 on the disc, 4 on a polar aurora).

viii. The radiant of this meteor shower is in:

  1. Cygnus
  2. Gemini
  3. Leo
  4. Perseus
  5. Cetus
  6. Orion [1 т.]
Black chart of meteor trails drawn as white arrows on a coordinate grid; right ascension labels 120 to 240 along the top, 40, 20, R 360 A, 340, 320 along the bottom, NPD 20 to 100 along the centre line, and 60–100 / 260–300 on the sides.

Отговори

Решение

Внимание: Непълно решение

No worked solutions in the archive; only the answer codes printed after each question are available.

Оригинал в Архива: Horizontal_questions.pdf