The sidereal period of the Moon is the time needed for it to return to the same position against the background of stars. The Moon appears to move completely around the celestial sphere once in about 27.3 days as observed from the Earth. This is called a sidereal month. It represents the orbital period of the Moon around the Earth.

(The mass of Saturn is 5.680 ? 1026 kg, the orbital radius is 1.427 ? 109 km and the orbital period is 29.5 y.) (b) Compare this angular momentum with the angular momentum of Saturn on its axis. (The radius of Saturn is 6.027 ? 104 km and the rotation period is 10.66 h.)

The dwarf planet Pluto has an elliptical orbit with a semi-major axis of 5.91×1012 m and eccentricity 0.249. A) Calculate Pluto's orbital period. Express your answer in seconds B) Calculate Pluto's orbital period. Express your answer in earth years C) During Pluto's orbit around the sun, what are its closest distance from the sun?

Calculate the orbital period of the Hubble Space Telescope (assume a circular orbit). Give you answer in units of minutes to an accuracy of ±4 minutes. The Hubble Space Telescope orbits the Earth at an altitude of h = 569 km above the Earth (1 km = 10 3 m) .

5. In an eclipsing spectroscopic binary, the maximal radial velocities measured for the two components are 20 km s−1 and 5 km s−1 . The orbit is circular, and the orbital period is P = 5 yr. It takes 0.3 day from the start of the eclipse to the main minimum, which then lasts 1 day. a. Find the mass of each star.

An asteroid is a rocky body in space which may be only a few hundred feet wide or it may be several hundred miles wide.

Say an asteroid is discovered that is on average of 3 AU from the Sun. Which of the following best approximates the orbital period of this asteroid? (Kepler's 3rd law) Stars X, Y, and Z have apparent magnitudes (how bright the stars appear in the …

a) Calculate the orbital radius of Pluto in AU if its orbital period is 248 Earth years. sing kepler's thed law. As mym, so formula, we can write. nemam acbital radius (for circulac ochit] Nou T = 248 the earth years = 248 *365*24 36005 T is time period of body [here for pluto ] a3.(248.365x24x3600)*66740tk 240

LESSON 4 5.00 max Use the tool from Lesson 4, shown in Figure 5-4, for questions 11 and 12. mins 11. Use the tool to predict the orbital period of 25.90 km/s) an asteroid that has an orbital radius of 3 AU. 1.00 mar P = 1.00 5.00 Kepler's third law, p2 a3, to check your Now use prediction. mins 1.00 AU Now take the square root STOPWATCH initial ON of the result, P = …

45. II Mars has two moons, Phobos and Deimos. Phobos orbits Mars at a distance of 9380 km from Mars's center, while Dei- mos orbits at 23,500 km from the center. What is the ratio of the orbital period of Deimos to that of Phobos?