IOAA 2018, Наблюдения — Задача 3. O3

12th International Olympiad on Astronomy and Astrophysics — Observational Competition and Mountain Team Competition · 20 т.

Внимание: Бележка към темата

The archive includes separate suggested KOR corrections. O4 changes the accepted constellation; O5 proposes 1.7° while the final night key prints 1.8°. Both versions and their original scoring are retained. The Mountain task has no supplied key.

Условие

Day — Instructions

  1. This part of the contest consists of 4 problems, is 1 hour long and is worth a total of 100 points.

  2. Only blue pen should be used to fill in the answer boxes, draw and mark on the star chart.

  3. You are not allowed to leave your working desk without permission. If you need any assistance (malfunctioning calculator, need to visit a restroom, etc.), please put up your hand to signal the supervisor.

  4. The beginning and end of the competition will be indicated by a long sound signal.

  5. Wait at your table until your envelope is collected. Once all envelopes are collected, your student guide will escort you out of the competition area.

Figure 3 is a star chart of a part of the sky on March 21, 2018. The longitude and latitude of the observation site is 120°E, 40°N (UTC+8). The grid in the figure is an equatorial grid. The thicker vertical line in the centre is the meridian. Estimate the mean solar time to an accuracy of better than 0.5h.

Star chart of part of the sky with an equatorial grid: declination circles labelled 30°, 0° and −30°, and hour circles labelled 14h, 12h, 10h and 8h. A thick vertical line through the centre is the meridian, marked N at the top and S at the bottom. Stars are drawn as black dots joined by constellation lines, without constellation names. A grey band along the bottom of the chart shows the region below the horizon.
Figure 3

Отговори

Решение

Оригинал в Архива: Observational Problems.pdf · официални решения: 18_obs_day_sol.pdf · допълнителни данни: 18_obs_night_sol.pdf · допълнителни данни: IOAA-Observation.zip / IOAA-Observation/Suggestion by KOR/IOAA2018 Observational Solution (Day)_correction.docx · допълнителни данни: IOAA-Observation.zip / IOAA-Observation/Suggestion by KOR/IOAA2018 Observational Solution(Night-Cloudy)_correction.docx · допълнителни данни: IOAA-Observation.zip / IOAA-Observation/Suggestion by KOR/Readme_correction.docx · допълнителни данни: 18_team.pdf