Compara mètodes

	Transfert de Hohmann	Determinació d'òrbites (Problema de Lambert)
Camp	Física aplicada	Física aplicada
Família	Process / pipeline	Process / pipeline
Any d'origen	1925	1761
Autor original	Walter Hohmann	Johann Heinrich Lambert
Tipus	Trajectory optimization algorithm	Orbital computation algorithm
Font seminal	Hohmann, W. (1925). Die Erreichbarkeit der Himmelskörper. R. Oldenbourg.	Lambert, J. H. (1761). Acta Helvetica. Physico-Mathematico-Anatomico-Botanico-Medica.
Àlies	Hohmann-Vallado transfer, two-impulse maneuver	Lambert's problem, Lambert-Godstein trajectory problem
Relacionats	4	4
Resum	The Hohmann transfer is a maneuver that transfers a spacecraft between two circular orbits using two impulsive burns (velocity changes). Introduced by German engineer Walter Hohmann in 1925, it is the most fuel-efficient method for coplanar orbital transfers when the transfer time is not severely constrained. The transfer orbit is an ellipse tangent to both the initial and final orbits.	Lambert's problem is a classical astrodynamics boundary-value problem that determines an orbit connecting two points in space given a transfer time. Formulated by Johann Heinrich Lambert in the 18th century, it is fundamental to trajectory design for interplanetary missions and spacecraft maneuvers. The solution provides the orbital elements and velocities needed to transition between two positions.