Съдържание

Условие 3.1 (40 т.)3.2 (40 т.)Решение

IOAA 2009, Наблюдения — Задача 3. Telescopic Observations — Question 3

Оригинал на условието (PDF)Съобщи за грешка

Всички материали от IOAA 2009

3rd International Olympiad of Astronomy and Astrophysics — Observational Competition · 80 т.

Please read these instructions carefully:

All participants will receive a problem set, a writing board, a pen, a ruler and a headlight by the organizers.
This competition consists of two parts: i) Two questions on “Naked Eye observation”. You Have 12 minutes to answer these two questions. ii) One question on “Using a telescope”. Each part of this question has a specific time, which is mentioned in your question sheet.
All participants will be guided by assistants to the observing site until returning to the waiting hall. Assistants will collect the answer and problem sheets.
Do not forget to fill out the boxes at the top of each answer sheet with your country name and your student code.
You have 2 minutes to familiarize yourself with Observing ground and darkness of your environment, just before starting the exam time in observing ground.
Examiner’s alarm will indicate the beginning and the end of each part of your exam.
Each problem has a specific guideline which helps you during the exam.

Условие

Note: You have only 13 Minutes to answer all parts of this Question.

Before starting this part, please note:

The telescope is pointed by the examiner towards Caph ( $\alpha$ Cas). Please note the readings on the grade circles before moving the telescope (to be used in 3.2).

3.1 (40 т.)

Choose one of the 4 recommended stars listed below; write down the name of the selected star in table 3-1 and point the telescope to that star. Then, notify the examiner to check it.

Deneb (Alpha Cygni)
Alfirk (Beta Cephei)
Algol (Beta Persei)
Capella (Alpha Aurigae)

(You have 6 Minutes to answer 3.1)

Table 3-1

Name of selected star

3.2 (40 т.)

The Telescope was parked to Caph in Cassiopeia constellation (RA: 0h:9.7m; Dec: $59^\circ:12^\prime$ ). Using the clock beside the telescope write down the local time (with the format of HH:MM:SS) in the appropriate field in Table B. Then, by using the graded circle on the telescope mount, estimate the “declination” and the “hour angle” of the target measured from South, which you chose in part one of this question. Then, complete Table 3-2.

(You have 7 Minutes to answer 3.2)

Table 3-2 — Name and Coordinates of the Selected Star

Name of Selected Star	Hour Angle (hh:mm)	Declination ( $^\circ$ : $^\prime$ )	Local Time

Решение

Coordinate of Selected Star

Star	Hour Angle	R.A.	Dec.
Deneb (Alpha Cygni)	ST-RA	20h 41m	$+45^\circ$
Alfirk (Beta Cephei)	ST-RA	21h 28m	$+71^\circ$
Algol (Beta Persei)	RA-ST	03h 08m	$+41^\circ$
Capella (Alpha Aurigae)	RA-ST	05h 18m	$+46^\circ$

Local Time: ______

Sidereal Time: ______

Part 1: Point the Telescope to the coordinates of the selected stars.

If the examiner confirms the star in the 32 mm eyepiece: 40 Points.

If the examiner confirms the star in the finder scope: 20 Points.

If the examiner doesn’t see the star in Finder: No Point.

Part 2: Estimate Hour Angle and Declination.

$\Delta=$ Error.

HA:

Error	Points
$\Delta\le30\,\mathrm{min}$	20
$30\,\mathrm{min}<\Delta\le45\,\mathrm{min}$	15
$45\,\mathrm{min}<\Delta\le\mathrm{hour}$	10
$1\,\mathrm{hour}<\Delta\le1.5\,\mathrm{hour}$	5
$\Delta>1.5\,\mathrm{hour}$	0

If Participant estimates R.A. Instead of H.A.: 20 Point.

Dec:

Error	Points
$\Delta\le2^\circ$	20
$2^\circ<\Delta\le4^\circ$	15
$4^\circ<\Delta\le8^\circ$	10
$8^\circ<\Delta\le10^\circ$	5
$\Delta>10^\circ$	0

Теми и трудност

Трудност: неоценена.

Небесна сфера и сферична астрономия · Небесни координати

Предпоставки: Разширена олимпиадна подготовка

Оригинал в Архива: 2009_Observation.pdf · официални решения: IOAA2009_final.pdf