MAE 161A HW2 (3)

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161A

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Aerospace Engineering

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Dec 6, 2023

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MAE 161A Homework # 2 Use this page as your coversheet Name: SID: Honor Code Statement: I, the undersigned, in accordance with the UCLA Student Conduct Code, hereby affirm that the work that I have presented on this assignment is my own and only my own, and that I have not copied work of other students." Signature: (To be submitted via Gradescope)
l. Kepler’s Equation. a. Determine the eccentricity of an elliptical orbit that spends % of its orbit between 0 =90° and 0 =270°. b. Find the distance to perigee for a geocentric satellite that satisfies (a) with a period of 12 hours. 2. A satellite 1s 1n an elliptical orbit around the earth. At perigee, the satellite 1s at 600 km altitude and moving 9.0 km/s. a. Complete the following table Semi-major axis Magnitude of Eccentricity Distance to apogee Orbital period b. Using Kepler's Equation, determine the time, Tso, for the satellite to move from perigee to a true anomaly of 6 =80°.
2. A satellite 1s 1n an elliptical orbit around the earth. At perigee, the satellite 1s at 600 km altitude and moving 9.0 km/s. a. Complete the following table Semi-major axis Magnitude of Eccentricity Distance to apogee Orbital period b. Using Kepler's Equation, determine the time, Tso, for the satellite to move from perigee to a true anomaly of 6 =80°.
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3. Hyperbolic Kepler’s Equation. Voyager | recently became the only man-made object to leave the solar system. Its current speed is v=17.2 km/s and its distance from the sun is r=18.8 x 10 km. Assume the perihelion of its orbit is located at the orbital radius of the Jupiter, ~SAU=7.48 X 108 km. (Hint find eccentricity and orbital parameter first) a. Suppose Voyager coasted to its current position from perihelion, find the turn angle of its orbit about the sun. b. How long did it take to get to its current location from Jupiter’s orbital radius?