PINE LIBRARY

lib_vsop87_jupiter

410
Library "lib_vsop87_jupiter"

get_helio_lon(t)
  Computes Jupiter's heliocentric ecliptic longitude using VSOP87 theory.
  Parameters:
    t (float): (float) Julian millennia from J2000.0 (use core.get_julian_millennia(time)).
  Returns: (float) Heliocentric ecliptic longitude in degrees, normalized to range [0, 360).

get_helio_lat(t)
  Computes Jupiter's heliocentric ecliptic latitude using VSOP87 theory.
  Parameters:
    t (float): (float) Julian millennia from J2000.0 (use core.get_julian_millennia(time)).
  Returns: (float) Heliocentric ecliptic latitude in radians, range approximately [-0.035, +0.035]. Note: Returns radians, not degrees.

get_helio_radius(t)
  Computes Jupiter's heliocentric radius (distance from Sun) using VSOP87 theory.
  Parameters:
    t (float): (float) Julian millennia from J2000.0 (use core.get_julian_millennia(time)).
  Returns: (float) Heliocentric radius in astronomical units (AU). Typical range is 4.95-5.46 AU.

get_geo_speed(t)
  Computes Jupiter's geocentric longitude speed (rate of change over time).
  Parameters:
    t (float): (float) Julian millennia from J2000.0 (use core.get_julian_millennia(time)).
  Returns: (float) Geocentric longitude speed in degrees per day. Negative values indicate retrograde motion (apparent backward movement).

get_geo_lon(t)
  Computes Jupiter's geocentric ecliptic longitude (as seen from Earth).
  Parameters:
    t (float): (float) Julian millennia from J2000.0 (use core.get_julian_millennia(time)).
  Returns: (float) Geocentric ecliptic longitude in degrees, normalized to range [0, 360).

get_geo_ecl_lat(t)
  Computes Jupiter's geocentric ecliptic latitude (as seen from Earth).
  Parameters:
    t (float): (float) Julian millennia from J2000.0 (use core.get_julian_millennia(time)).
  Returns: (float) Geocentric ecliptic latitude in degrees, range approximately [-2, +2].

get_geo_decl(t)
  Computes Jupiter's geocentric equatorial declination (as seen from Earth).
  Parameters:
    t (float): (float) Julian millennia from J2000.0 (use core.get_julian_millennia(time)).
  Returns: (float) Geocentric equatorial declination in degrees, range [-90, +90] where positive is north.

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