poliastro.threebody.cr3bp_char_quant

@author: Dhruv Jain, Multi-Body Dynamics Research Group, Purdue University.

Module Contents

Classes

SystemChars

Computes and stores the properties (mu, l*, t*) of a CR3BP system

class poliastro.threebody.cr3bp_char_quant.SystemChars(name, mu, lstar, tstar)

Computes and stores the properties (mu, l*, t*) of a CR3BP system ‘mu’: mass ratio of P1-P2 primary bodies ‘l*’: characterisitic lenght of P1-P2 system ‘t*’: characterisitic time of P1-P2 system If P2 is more massive than P1 then swap the Pi, so that P1 is the more massive body.

property name

Name of P1-P2 system.

property mu

Mass ratio of P1-P2 primary bodies in CR3BP.

property lstar

Characterisitc length of P1-P2 system.

property tstar

Characterisitc time of P1-P2 system.

classmethod from_primaries(p1, p2)

Computes and sets the characteristic quanitites based on p1 and p2 bodies.

Parameters

• p1 (Body) –

• p2 (Body) –

classmethod bodies_char_compute(p1, p2)

Calculates mu, lstar, and tstar of the ‘p1’ and ‘p2’ system.

Also, if M2>M1, then swaps p1 and p2, so that M1>M2

Parameters

• p1 (Body) –

• p2 (Body) –

Returns

• name (string) – System name, format: ‘Body1Body2’, e.g. ‘EarthMoon’, ‘SunEarth’

• mu (float, dimensionless) – mass ratio of P1-P2 primary bodies

• lstar (float, km) – Characterisitc length of P1-P2 system

• tstar (float, sec) – Characterisitc time of P1-P2 system