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DA Problem 1999

The document outlines the practical round of the IV International Astronomy Olympiad, detailing an observational program for a 40-cm telescope. It lists specific stars to observe, their magnitudes, and coordinates, along with the moon rise time and local observatory coordinates. Additionally, it includes a task to estimate the ratio of R/r for an eclipsing binary based on a provided light curve.

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13 views2 pages

DA Problem 1999

The document outlines the practical round of the IV International Astronomy Olympiad, detailing an observational program for a 40-cm telescope. It lists specific stars to observe, their magnitudes, and coordinates, along with the moon rise time and local observatory coordinates. Additionally, it includes a task to estimate the ratio of R/r for an eclipsing binary based on a provided light curve.

Uploaded by

funykids2008
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
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Download as PDF, TXT or read online on Scribd
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IV International Astronomy Olympiad, Problems to solve

Practical round
7. Write the observational program for this night on a 40-cm telescope.
What stars would you observe this nigth? Write sequence of the observations.
Stars to observe:

V (mag) a d (1950)

1 h Aql 3m.5 19h 49m.9 0 53

2 b Per 2.1 3 04.9 40 46

3 c Cyg 14.2 19 48.6 32 47

4 R Aqr 12.4 23 41.2 -15 34

5 a Ori 1.3 5 52.4 7 24

6 RW Vir 6.7 12 04.7 -6 29

Moon rise: 21:17:26, phase 0.77


Sideral time for 0h s0 = 0:31:04
You may use all observational time (since 20h till 5h 30 min).
Local time LT=UT+3
Coordinates of observatory  = 2h16m  = 4443
Put your result into the table:

Star Interval of observation

Stars that could not be included in the program:


Explanations and notes:

8. A ligth curve of eclipsing binary is shown in the figure. Estimate the ratio of R/r in assuming that the
eclipse is central and the small component is fainter.

http://www.issp.ac.ru/iao/1999/problems/vi99us_e.html (3 of 4) [04.05.2009 07:01:44]


IV International Astronomy Olympiad, Problems to solve

http://www.issp.ac.ru/iao/1999/problems/vi99us_e.html (4 of 4) [04.05.2009 07:01:44]

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