Secondary Keplerian body¶
- class starry.Secondary¶
A secondary (orbiting) body.
- Parameters
map – The surface map of this body. This should be an instance returned by
starry.Map()
.r (scalar, optional) – The radius of the body in units of
length_unit
. Defaults to 1.0.m (scalar, optional) – The mass of the body in units of
mass_unit
. Defaults to 1.0.a (scalar, optional) – The semi-major axis of the body in units of
time_unit
. Defaults to 1.0. Ifporb
is also provided, this value is ignored.porb (scalar, optional) – The orbital period of the body in units of
time_unit
. Defaults to 1.0. Setting this value overridesa
.prot (scalar, optional) – The rotation period of the body in units of
time_unit
. Defaults to 1.0.t0 (scalar, optional) – A reference time in units of
time_unit
. This is taken to be the time of a reference transit. Defaults to 0.0.ecc (scalar, optional) – The orbital eccentricity of the body. Defaults to 0.
w (scalar, optional) – The argument of pericenter of the body in units of
angle_unit
. Defaults to 90 degrees.omega (scalar, optional) – The argument of pericenter of the body in units of
angle_unit
. Defaults to 90 degrees.Omega (scalar, optional) – The longitude of ascending node of the body in units of
angle_unit
. Defaults to 0 degrees.inc (scalar, optional) – The orbital inclination of the body in units of
angle_unit
. Defaults to 90 degrees.theta0 (scalar, optional) – The rotational phase of the map at time
t0
in units ofangle_unit
. Defaults to 0.0.length_unit (optional) – An
astropy.units
unit defining the distance metric for this object. Defaults toastropy.units.Rsun.
mass_unit (optional) – An
astropy.units
unit defining the mass metric for this object. Defaults toastropy.units.Msun.
time_unit (optional) – An
astropy.units
unit defining the time metric for this object. Defaults toastropy.units.day.
angle_unit (optional) – An
astropy.units
unit defining the angular metric for this object. Defaults toastropy.units.degree.
- property Omega¶
The longitude of ascending node in units of
angle_unit
.
- property a¶
The semi-major axis in units of
length_unit
.Note
Setting this value overrides the value of
porb
.
- property angle_unit¶
An
astropy.units
unit defining the angle metric for this body.
- property ecc¶
The orbital eccentricity.
- property inc¶
The orbital inclination in units of
angle_unit
.
- property length_unit¶
An
astropy.units
unit defining the length metric for this body.
- property map¶
The surface map for this body.
- property mass_unit¶
An
astropy.units
unit defining the mass metric for this body.
- property porb¶
The orbital period in units of
time_unit
.Note
Setting this value overrides the value of
a
.
- property r¶
The radius in units of
length_unit
.
- property time_unit¶
An
astropy.units
unit defining the time metric for this body.
- property w¶
The longitude of pericenter in units of
angle_unit
.