For holding information on a body's physical and rotational properties. More...

#include <aephem.h>

Data Fields
double	r_mean
	Mean radius, km. Not required.

double	r_eq
	Equatorial radius, km.

double	r_pole
	Polar radius, km.

double	rms_dev_spheroid
	RMS deviation from spheroid, km. Not required.

double	max_elev
	Maximum elevation, km. Not required.

double	max_depress
	Maximum depression, km. Not required.

double	pole_ra
	North pole ra, J2000. More...

double	pole_ra_t
	North pole ra coefficient for T = Julian centuries since J2000.

struct ae_physical_term_t *	ra_sin_term
	Sine series coefficents for the north pole ra.

double	pole_dec
	North pole declination, J2000. More...

double	pole_dec_t
	North pole dec coefficient for T = Julian centuries since J2000.

struct ae_physical_term_t *	dec_cos_term
	Cosine series coefficents for the north pole dec.

double	w
	Prime meridean. More...

double	w_d
	Prime meridean coefficient for d = days since J2000.

double	w_d_sq
	Prime meridean coefficient for d^2.

struct ae_physical_term_t *	w_sin_term
	Sine series coefficents for the prime meridian.

Detailed Description

For holding information on a body's physical and rotational properties.

The members pole_ra_sin, pole_dec_cos and w_sin point to arrays which are of length $4 \times n$ , where $n$ is n_pole_ra_t, etc. The elements of the arrays are ${a_1, b_1, c_1, t_1, ..., a_n, b_n, c_n, //! t_n}$ , so that the contribution to the rotation terms are as $a //! \sin(b + cx)$ , where $x$ is the number of Julian centuries since J2000 if $t$ is AE_PHYSICAL_D or the number of days since J2000 if $t$ is AE_PHYSICAL_T, and the sine term is a cosine for the case of pole_dec_cos.