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1. Vis-Viva Equation
vrelative speed of the two bodies (m/s)
GNewtonian constant of gravitation
Mmass of the central body (kg)
rdistance between the two bodies (m)
asemi-major axis (m)
Variables...
  valueunitslink
v
M
r
a
2. Vis-Viva Equation with standard gravitational parameter
vrelative speed of the two bodies (m/s)
μstandard gravitational parameter(Earth:3.986004418e+14) (m3/s2)
rdistance between the two bodies (m)
asemi-major axis (m)
Variables...
  valueunitslink
v
μ
r
a
3. Vis-Viva Equation - cirlcular orbit
vrelative speed of the two bodies (m/s)
μstandard gravitational parameter (m3/s2)
rdistance between the two bodies (m)
Variables...
  valueunitslink
v
μ
r

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