ae_physical_t Struct Reference

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

#include <aephem.h>

## Data Fields

double r_mean

double r_eq

double r_pole

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_tra_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_tdec_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_tw_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 , where is n_pole_ra_t, etc. The elements of the arrays are , so that the contribution to the rotation terms are as , where is the number of Julian centuries since J2000 if is AE_PHYSICAL_D or the number of days since J2000 if is AE_PHYSICAL_T, and the sine term is a cosine for the case of pole_dec_cos.

## Field Documentation

 double ae_physical_t::pole_dec

North pole declination, J2000.

Referenced by ae_phys_pole(), and ae_subobs_point().

 double ae_physical_t::pole_ra

North pole ra, J2000.

Referenced by ae_phys_pole(), and ae_subobs_point().

 double ae_physical_t::w

Prime meridean.

Referenced by ae_phys_pole(), and aes_subobs_point().

The documentation for this struct was generated from the following file:
 AEPHEM documentation generated by Doxygen v1.8.9.1 at Sat Aug 1 2015 15:02:46.