IOAA 2014, Наблюдения, планетариум, част I — Задача 1. Question 1

OBSERVATIONAL TEST PLANETARIUM — PART I · 20 т.

Inside the dome:

  1. The observational round in the planetarium consists of two parts, one inside the dome and the other outside the dome.

  2. The inside part consists of 3 questions and takes 30 minutes.

  3. When you enter the dome, you will be directed to your seat. Here you will find a clipboard with your answer sheet attached, one data table and a flashlight. During the adaptation time the students may stand and change the position around his place, but they are not allowed to communicate with each other. During the observation you can stand and turn in order to make a comfortable observation.

  4. Fill your student ID in the box on the answersheet.

  5. PAY ATTENTION TO THE ASSISTANTS, and follow their instructions.

  6. The timing for the first part is as follows:

    a) 8 minutes for your eye adaptation to the darkness;

    b) 10 minutes for the first question;

    c) 6 minutes for the second question;

    d) 6 minutes for the third question;

  7. Use the flash light only when you need it and point it only to your paper.

  8. When you leave the dome, leave everything on your seat.

  9. PLEASE WRITE ONLY ON THE PRINTED SIDE OF THE ANSWER SHEET. DON’T USE THE REVERSE SIDE. The evaluator will not take into account what is written on the reverse of the answer sheet.

GOOD LUCK!

Условие

The sky projected in the dome corresponds to Suceava (Long 26026^{0} 15’), at 18:00 UT, on a certain day of a certain month.

8 minutes – relax and familiarize your eyes with the darkness. During this time don’t use the flash light.

Two arcs of circle will now be projected. The arcs are segmented. Each segment represents an interval of some degrees. This number is not the same for each arc.

10 minutes – Question 1

a. Identify each arc by circling the correct name and give the angular size of each segment (in degrees).

First arcEquatorMeridianEclipticSegment size
Second arcEquatorMeridianEclipticSegment size

[6 т.]

b. Estimate the local sidereal time of the sky you see in the dome.

θsidereal\theta_{\mathrm{sidereal}}

[6 т.]

c. Determine the month to which the projected sky would correspond at the given time. Fill in the box the number of the month (1 to 12).

Month number

[8 т.]

Отговори

Решение

Оригинал в Архива: Observational_planetarium.docx · официални решения: Planetarium_Answers.docx