pint.orbital.kepler.KeplerTwoBodyParameters

class pint.orbital.kepler.KeplerTwoBodyParameters(a, pb, eps1, eps2, i, lan, q, x_cm, y_cm, z_cm, vx_cm, vy_cm, vz_cm, tasc)[source]

Bases: KeplerTwoBodyParameters

Parameters to describe a one-object 3D Keplerian orbit.

Parameters:

a (float) – semimajor axis
pb (float) – binary period
eps1 (float) – eccentricity parameters
eps2 (float) – eccentricity parameters
i (float) – inclination angle
lan (float) – longitude of the ascending node
q (float) – mass ratio of bodies (companion over primary)
x_cm (float) –
y_cm (float) –
z_cm (float) – position of the center of mass
vx_cm (float) –
vy_cm (float) –
vz_cm (float) – velocity of the center of mass
tasc (float) – time of the ascending node

Create new instance of KeplerTwoBodyParameters(a, pb, eps1, eps2, i, lan, q, x_cm, y_cm, z_cm, vx_cm, vy_cm, vz_cm, tasc)

Methods

`count`(value, /)	Return number of occurrences of value.
`index`(value[, start, stop])	Return first index of value.

Attributes

`a`	Alias for field number 0
`eps1`	Alias for field number 2
`eps2`	Alias for field number 3
`i`	Alias for field number 4
`lan`	Alias for field number 5
`pb`	Alias for field number 1
`q`	Alias for field number 6
`tasc`	Alias for field number 13
`vx_cm`	Alias for field number 10
`vy_cm`	Alias for field number 11
`vz_cm`	Alias for field number 12
`x_cm`	Alias for field number 7
`y_cm`	Alias for field number 8
`z_cm`	Alias for field number 9

__add__(value, /): Return self+value.

__mul__(value, /): Return self*value.

a: Alias for field number 0

count(value, /): Return number of occurrences of value.

eps1: Alias for field number 2

eps2: Alias for field number 3

i: Alias for field number 4

index(value, start=0, stop=9223372036854775807, /)

Return first index of value.

Raises ValueError if the value is not present.

lan: Alias for field number 5

pb: Alias for field number 1

q: Alias for field number 6

tasc: Alias for field number 13

vx_cm: Alias for field number 10

vy_cm: Alias for field number 11

vz_cm: Alias for field number 12

x_cm: Alias for field number 7

y_cm: Alias for field number 8

z_cm: Alias for field number 9