Its heliocentric velocity is approximately " 13 km / s.
2.
These launches were followed by the 1976 launch of heliocentric velocity of 70 km / s at closest approach to the Sun.
3.
Upon escaping the Earth's gravitational field the rocket will have a heliocentric velocity of 30 km / s in interplanetary space.
4.
To study the Sun at all latitudes the probe needed to change its orbital inclination and leave the plane of the Solar System to change the orbital inclination of a spacecraft a large change in heliocentric velocity is needed.
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