# Deviation from Earth's orbit

How much orbital deviation is required for the Earth to get knocked out from current orbit so it either moves away from Sun or towards the Sun?

The earth's orbital speed, $v_{orbital}$ around the Sun is 29.77 km/s. $$v_{escape} = \sqrt{2}\times v_{orbital} = 42.1 km/s$$ This is the requirement to leave the Sun's orbit.