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Creola Katherine Johnson (née Coleman; August 26, 1918 – February 24, 2020) was an American mathematician whose calculations of orbital mechanics as a NASA employee were critical to the success of the first and subsequent U.S. crewed spaceflights. [1][2] During her 33-year career at NASA and its predecessor, she earned a reputation for ...
Orbital state vectors. In astrodynamics and celestial dynamics, the orbital state vectors (sometimes state vectors) of an orbit are Cartesian vectors of position ( ) and velocity ( ) that together with their time (epoch) ( ) uniquely determine the trajectory of the orbiting body in space. [1]: 154. Orbital state vectors come in many forms ...
Gauss's method. In orbital mechanics (a subfield of celestial mechanics), Gauss's method is used for preliminary orbit determination from at least three observations (more observations increases the accuracy of the determined orbit) of the orbiting body of interest at three different times. The required information are the times of observations ...
North Carolina State University Chancellor Randy Woodson declared his retirement plans at the university's trustees meeting Thursday, capping off nearly 15 years in his role. His term will ...
e. In astrodynamics, the orbital eccentricity of an astronomical object is a dimensionless parameter that determines the amount by which its orbit around another body deviates from a perfect circle. A value of 0 is a circular orbit, values between 0 and 1 form an elliptic orbit, 1 is a parabolic escape orbit (or capture orbit), and greater than ...
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