Question 1655Navigation General

The correct answer is B) 11 hours. To determine the right ascension of the planet, we need to use the relationship between the GHA (Greenwich Hour Angle) of the first point of Aries and the GHA of the planet. The right ascension of a celestial body is the angle measured eastward along the celestial equator from the first point of Aries to the hour circle passing through the body. Given: - GHA of the first point of Aries is 315° - GHA of the planet is 150° The right ascension of the planet is the difference between the GHA of the planet and the GHA of the first point of Aries, which is 150° - 315° = -165°. Since right ascension is measured in hours, with 1 hour corresponding to 15°, the right ascension of the planet is -165° / 15° = -11 hours. The other options are incorrect because they do not match the calculated right ascension of the planet.