Elliptical Transfer Orbit
Elliptical Transfer Orbit (ETO) is a type of orbit used to transfer a spacecraft from one circular orbit to another. It is an elliptical orbit that intersects both the initial and final circular orbits. The spacecraft is first placed in the lower circular orbit and then a short burn is made to transfer it to the elliptical transfer orbit. Once in the ETO, a second burn is made at the apogee of the orbit to transfer the spacecraft to the higher circular orbit. ETOs are commonly used for interplanetary missions, as they allow for efficient use of fuel and can take advantage of the gravitational pull of planets. However, they require precise calculations and planning to ensure a successful transfer.
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