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Which of the following could be the hour angle of a star as it rises to the south of east?

A. 5 hours
B. 7 hours
C. 17 hours
D. 19 hours

What is the hour angle of the Winter Solstice when the sidereal time is 20 hours?

A. 2 hours
B. 14 hours
C. 18 hours
D. 20 hours

Answer :

The hour angles that could be associated with a star rising to the South of East are:7 hours and 17 hours

As for the hour angle of the Winter Solstice when the sidereal time is 20 hours, it would be: 2 hours


The hour angle of a star is the angular distance measured westward along the celestial equator from the observer's meridian to the hour circle passing through the star.

It is expressed in hours, minutes, and seconds.
For a star rising to the South of East, the hour angle will be positive.



Learn more about hour angles

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