Class: Lunation::Calculation

Inherits:
Object
  • Object
show all
Includes:
EarthPositionVSOP87, MoonIlluminatedFraction, MoonPosition, NutationAndObliquity, SunPosition, Timekeeping
Defined in:
lib/lunation/calculation.rb,
lib/lunation/calculation/angle.rb,
lib/lunation/calculation/horner.rb,
lib/lunation/calculation/timekeeping.rb,
lib/lunation/calculation/sun_position.rb,
lib/lunation/calculation/moon_position.rb,
lib/lunation/calculation/earth_position_vsop87.rb,
lib/lunation/calculation/nutation_and_obliquity.rb,
lib/lunation/calculation/moon_illuminated_fraction.rb

Defined Under Namespace

Modules: EarthPositionVSOP87, MoonIlluminatedFraction, MoonPosition, NutationAndObliquity, SunPosition, Timekeeping Classes: Angle, Horner

Constant Summary

Constants included from Timekeeping

Timekeeping::DELTA_T_1600AD_1700AD, Timekeeping::DELTA_T_1700AD_1800AD, Timekeeping::DELTA_T_1800AD_1860AD, Timekeeping::DELTA_T_1860AD_1900AD, Timekeeping::DELTA_T_1900AD_1920AD, Timekeeping::DELTA_T_1920AD_1941AD, Timekeeping::DELTA_T_1941AD_1961AD, Timekeeping::DELTA_T_1961AD_1986AD, Timekeeping::DELTA_T_1986AD_2005AD, Timekeeping::DELTA_T_2005AD_2050AD, Timekeeping::DELTA_T_500AD_1600AD, Timekeeping::DELTA_T_500BC_500AD, Timekeeping::EPOCH_J2000_JDE, Timekeeping::JULIAN_CENTURY_IN_DAYS, Timekeeping::SECONDS_PER_DAY

Constants included from MoonPosition

MoonPosition::CORRECTION_ECCENTRICITY_OF_EARTH_CONSTANTS, MoonPosition::FIXED_DISTANCE_BETWEEN_EARTH_AND_MOON, MoonPosition::MOON_ARGUMENT_OF_LATITUDE_CONSTANTS, MoonPosition::MOON_LATITUDE_PERIOD_TERMS, MoonPosition::MOON_LATITUDE_PERIOD_TERMS_PATH, MoonPosition::MOON_LONGITUDE_AND_DISTANCE_PERIOD_TERMS, MoonPosition::MOON_LONGITUDE_AND_DISTANCE_PERIOD_TERMS_PATH, MoonPosition::MOON_MEAN_ANOMALY_CONSTANTS, MoonPosition::MOON_MEAN_ELONGATION_CONSTANTS, MoonPosition::MOON_MEAN_LONGITUDE_CONSTANTS, MoonPosition::RADIUS_OF_EARTH

Constants included from NutationAndObliquity

NutationAndObliquity::ECLIPTIC_MEAN_OBLIQUITY_CONSTANTS, NutationAndObliquity::LONGITUDE_OF_THE_ASCENDING_NODE_CONSTANTS, NutationAndObliquity::MOON_ARGUMENT_OF_LATITUDE_CONSTANTS, NutationAndObliquity::MOON_MEAN_ANOMALY_CONSTANTS, NutationAndObliquity::MOON_MEAN_ELONGATION_FROM_SUN_CONSTANTS, NutationAndObliquity::NUTATION_IN_OBLIQUITY_PERIODIC_TERMS, NutationAndObliquity::NUTATION_IN_OBLIQUITY_PERIODIC_TERMS_PATH, NutationAndObliquity::SUN_MEAN_ANOMALY_CONSTANTS

Constants included from EarthPositionVSOP87

EarthPositionVSOP87::PERIODIC_TERMS_B0, EarthPositionVSOP87::PERIODIC_TERMS_B0_PATH, EarthPositionVSOP87::PERIODIC_TERMS_B1, EarthPositionVSOP87::PERIODIC_TERMS_B1_PATH, EarthPositionVSOP87::PERIODIC_TERMS_L0, EarthPositionVSOP87::PERIODIC_TERMS_L0_PATH, EarthPositionVSOP87::PERIODIC_TERMS_L1, EarthPositionVSOP87::PERIODIC_TERMS_L1_PATH, EarthPositionVSOP87::PERIODIC_TERMS_L2, EarthPositionVSOP87::PERIODIC_TERMS_L2_PATH, EarthPositionVSOP87::PERIODIC_TERMS_L3, EarthPositionVSOP87::PERIODIC_TERMS_L3_PATH, EarthPositionVSOP87::PERIODIC_TERMS_L4, EarthPositionVSOP87::PERIODIC_TERMS_L4_PATH, EarthPositionVSOP87::PERIODIC_TERMS_L5, EarthPositionVSOP87::PERIODIC_TERMS_L5_PATH, EarthPositionVSOP87::PERIODIC_TERMS_R0, EarthPositionVSOP87::PERIODIC_TERMS_R0_PATH, EarthPositionVSOP87::PERIODIC_TERMS_R1, EarthPositionVSOP87::PERIODIC_TERMS_R1_PATH, EarthPositionVSOP87::PERIODIC_TERMS_R2, EarthPositionVSOP87::PERIODIC_TERMS_R2_PATH, EarthPositionVSOP87::PERIODIC_TERMS_R3, EarthPositionVSOP87::PERIODIC_TERMS_R3_PATH, EarthPositionVSOP87::PERIODIC_TERMS_R4, EarthPositionVSOP87::PERIODIC_TERMS_R4_PATH

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods included from Timekeeping

#delta_t, #dynamical_time, #julian_ephemeris_day, #time, #time_millennia, #time_myriads

Methods included from SunPosition

#corrected_obliquity_of_ecliptic, #distance_between_earth_and_sun_in_astronomical_units, #distance_between_earth_and_sun_in_kilometers, #earth_orbit_eccentricity, #longitude_of_ascending_node_low_precision, #sun_anomaly, #sun_declination, #sun_ecliptic_longitude, #sun_equation_of_center, #sun_mean_anomaly2, #sun_mean_longitude, #sun_right_ascension, #sun_true_longitude

Methods included from MoonPosition

#correction_eccentricity_of_earth, #correction_jupiter, #correction_latitude, #correction_venus, #distance_between_earth_and_moon, #equatorial_horizontal_parallax, #moon_apparent_ecliptic_longitude, #moon_argument_of_latitude_high_precision, #moon_declination, #moon_ecliptic_latitude, #moon_ecliptic_longitude, #moon_heliocentric_distance, #moon_heliocentric_latitude, #moon_heliocentric_longitude, #moon_mean_anomaly_high_precision, #moon_mean_elongation_from_sun_high_precision, #moon_mean_longitude, #moon_right_ascension

Methods included from NutationAndObliquity

#longitude_of_ascending_node, #mean_obliquity_of_ecliptic, #moon_argument_of_latitude, #moon_mean_anomaly, #moon_mean_elongation_from_sun, #nutation_in_longitude, #nutation_in_obliquity, #obliquity_of_ecliptic, #sun_mean_anomaly

Methods included from MoonIlluminatedFraction

#moon_elongation_from_sun, #moon_illuminated_fraction, #moon_phase_angle, #moon_position_angle_of_bright_limb

Methods included from EarthPositionVSOP87

#ecliptic_latitude_of_earth_using_vsop87, #ecliptic_longitude_of_earth_using_vsop87, #radius_vector_of_earth_using_vsop87

Constructor Details

#initialize(datetime = DateTime.now) ⇒ Calculation

Returns a new instance of Calculation.



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# File 'lib/lunation/calculation.rb', line 21

def initialize(datetime = DateTime.now)
  @datetime = datetime
  @decimal_year = datetime.year + (datetime.month - 0.5) / 12.0
end

Instance Attribute Details

#datetime ⇒ Object (readonly)

Returns the value of attribute datetime.



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# File 'lib/lunation/calculation.rb', line 19

def datetime
  @datetime
end

#decimal_year ⇒ Object (readonly)

Returns the value of attribute decimal_year.



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# File 'lib/lunation/calculation.rb', line 19

def decimal_year
  @decimal_year
end

Instance Method Details

#to_h ⇒ Object 



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# File 'lib/lunation/calculation.rb', line 26

def to_h
  {
    # rubocop:disable Layout/LineLength
    corrected_obliquity_of_ecliptic: corrected_obliquity_of_ecliptic,
    correction_eccentricity_of_earth: correction_eccentricity_of_earth,
    correction_jupiter: correction_jupiter,
    correction_latitude: correction_latitude,
    correction_venus: correction_venus,
    datetime: datetime,
    decimal_year: decimal_year,
    delta_t: delta_t,
    distance_between_earth_and_moon: distance_between_earth_and_moon,
    distance_between_earth_and_sun_in_astronomical_units: distance_between_earth_and_sun_in_astronomical_units,
    distance_between_earth_and_sun_in_kilometers: distance_between_earth_and_sun_in_kilometers,
    dynamical_time: dynamical_time,
    earth_orbit_eccentricity: earth_orbit_eccentricity,
    ecliptic_latitude_of_earth_using_vsop87: ecliptic_latitude_of_earth_using_vsop87,
    ecliptic_longitude_of_earth_using_vsop87: ecliptic_longitude_of_earth_using_vsop87,
    equatorial_horizontal_parallax: equatorial_horizontal_parallax,
    julian_ephemeris_day: julian_ephemeris_day,
    longitude_of_ascending_node_low_precision: longitude_of_ascending_node_low_precision,
    longitude_of_ascending_node: longitude_of_ascending_node,
    mean_obliquity_of_ecliptic: mean_obliquity_of_ecliptic,
    moon_apparent_ecliptic_longitude: moon_apparent_ecliptic_longitude,
    moon_argument_of_latitude_high_precision: moon_argument_of_latitude_high_precision,
    moon_argument_of_latitude: moon_argument_of_latitude,
    moon_declination: moon_declination,
    moon_ecliptic_latitude: moon_ecliptic_latitude,
    moon_ecliptic_longitude: moon_ecliptic_longitude,
    moon_elongation_from_sun: moon_elongation_from_sun,
    moon_heliocentric_distance: moon_heliocentric_distance,
    moon_heliocentric_latitude: moon_heliocentric_latitude,
    moon_heliocentric_longitude: moon_heliocentric_longitude,
    moon_illuminated_fraction: moon_illuminated_fraction,
    moon_mean_anomaly_high_precision: moon_mean_anomaly_high_precision,
    moon_mean_anomaly: moon_mean_anomaly,
    moon_mean_elongation_from_sun: moon_mean_elongation_from_sun,
    moon_mean_elongation_from_sun_high_precision: moon_mean_elongation_from_sun_high_precision,
    moon_mean_longitude: moon_mean_longitude,
    moon_phase_angle: moon_phase_angle,
    moon_position_angle_of_bright_limb: moon_position_angle_of_bright_limb,
    moon_right_ascension: moon_right_ascension,
    nutation_in_longitude: nutation_in_longitude,
    nutation_in_obliquity: nutation_in_obliquity,
    obliquity_of_ecliptic: obliquity_of_ecliptic,
    radius_vector_of_earth_using_vsop87: radius_vector_of_earth_using_vsop87,
    sun_anomaly: sun_anomaly,
    sun_declination: sun_declination,
    sun_ecliptic_longitude: sun_ecliptic_longitude,
    sun_equation_of_center: sun_equation_of_center,
    sun_mean_anomaly: sun_mean_anomaly,
    sun_mean_anomaly2: sun_mean_anomaly2,
    sun_mean_longitude: sun_mean_longitude,
    sun_right_ascension: sun_right_ascension,
    sun_true_longitude: sun_true_longitude,
    time_millennia: time_millennia,
    time_myriads: time_myriads,
    time: time,
    # rubocop:enable Layout/LineLength
  }
end

#to_s ⇒ Object 



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# File 'lib/lunation/calculation.rb', line 88

def to_s
  <<~HEREDOC
    DATE AND TIME (UT):                           #{datetime}
    ----------------------------------------------------------------------------------
    DECIMAL YEAR:                                 #{decimal_year}
    DELTA T:                                      #{delta_t}
    DYNAMICAL TIME:                               #{dynamical_time}
    JULIAN EPHEMERIS DAY:                         #{julian_ephemeris_day}
    JULIAN MYRIADS (10K YEARS) SINCE J2000:       #{time_myriads}
    TIME (JULIAN CENTURIES):                      #{time}
    TIME (JULIAN MILLENNIA):                      #{time_millennia}

    **********************************************************************************
    NUTATION AND OBLIQUITY
    **********************************************************************************

    EARTH NUTATION IN LONGITUDE:                  #{nutation_in_longitude.decimal_degrees}°
    ECLIPTIC MEAN OBLIQUITY:                      #{mean_obliquity_of_ecliptic.decimal_degrees}°
    ECLIPTIC TRUE OBLIQUITY:                      #{obliquity_of_ecliptic.decimal_degrees}°
    MOON ARGUMENT OF LATITUDE:                    #{moon_argument_of_latitude.decimal_degrees}°
    MOON MEAN ANOMALY:                            #{moon_mean_anomaly.decimal_degrees}°
    MOON MEAN ELONGATION FROM THE SUN:            #{moon_mean_elongation_from_sun.decimal_degrees}°
    LONGITUDE OF ASCENDING NODE:                  #{longitude_of_ascending_node.decimal_degrees}°
    NUTATION IN OBLIQUITY:                        #{nutation_in_obliquity.decimal_degrees}°
    SUN MEAN ANOMALY:                             #{sun_mean_anomaly.decimal_degrees}°

    **********************************************************************************
    POSITION OF THE SUN AND EARTH
    **********************************************************************************

    CORRECTED OBLIQUITY OF THE ECLIPTIC:          #{corrected_obliquity_of_ecliptic.decimal_degrees}°
    ECCENTRICITY OF THE EARTH'S ORBIT:            #{earth_orbit_eccentricity}
    EARTH-SUN DISTANCE (AU):                      #{distance_between_earth_and_sun_in_astronomical_units}
    EARTH-SUN DISTANCE (KM):                      #{distance_between_earth_and_sun_in_kilometers}
    LONGITUDE OF ASCENDING NODE (LOW PRECISION):  #{longitude_of_ascending_node.decimal_degrees}°
    SUN ECLIPTICAL LONGITUDE:                     #{sun_ecliptic_longitude.decimal_degrees}°
    SUN EQUATION CENTER:                          #{sun_equation_of_center.decimal_degrees}°
    SUN GEOCENTRIC DECLINATION:                   #{sun_declination.decimal_degrees}°
    SUN GEOCENTRIC MEAN LONGITUDE:                #{sun_mean_longitude.decimal_degrees}°
    SUN GEOCENTRIC RIGHT ASCENSION:               #{sun_right_ascension.decimal_degrees}°
    SUN MEAN ANOMALY2:                            #{sun_mean_anomaly2.decimal_degrees}°
    SUN TRUE ANOMALY:                             #{sun_anomaly.decimal_degrees}°
    SUN TRUE LONGITUDE:                           #{sun_true_longitude.decimal_degrees}°

    **********************************************************************************
    POSITION OF THE MOON
    **********************************************************************************

    CORRECTION JUPITER:                           #{correction_jupiter.decimal_degrees}°
    CORRECTION LATITUDE:                          #{correction_latitude.decimal_degrees}°
    CORRECTION VENUS:                             #{correction_venus.decimal_degrees}°
    CORRECTION EARTH ECCENTRICITY:                #{correction_eccentricity_of_earth}
    EARTH-MOON DISTANCE (KM):                     #{distance_between_earth_and_moon}
    EQUITORIAL HORIZONTAL PARALLAX:               #{equatorial_horizontal_parallax.decimal_degrees}°
    MOON ARGUMENT OF LATITUDE:                    #{moon_argument_of_latitude_high_precision.decimal_degrees}°
    MOON ECLIPTIC LATITUDE:                       #{moon_ecliptic_latitude.decimal_degrees}°
    MOON ECLIPTIC LONGITUDE:                      #{moon_apparent_ecliptic_longitude.decimal_degrees}°
    MOON GEOCENTRIC DECLINATION:                  #{moon_declination.decimal_degrees}°
    MOON GEOCENTRIC LONGITUDE:                    #{moon_ecliptic_longitude.decimal_degrees}°
    MOON GEOCENTRIC RIGHT ASCENSION:              #{moon_right_ascension.decimal_degrees}°
    MOON HELIOCENTRIC DISTANCE:                   #{moon_heliocentric_distance}
    MOON HELIOCENTRIC LATITUDE:                   #{moon_heliocentric_latitude}
    MOON HELIOCENTRIC LONGITUDE:                  #{moon_heliocentric_longitude}
    MOON MEAN ANOMALY:                            #{moon_mean_anomaly_high_precision.decimal_degrees}°
    MOON MEAN ELONGATION:                         #{moon_mean_elongation_from_sun_high_precision.decimal_degrees}°
    MOON MEAN LONGITUDE:                          #{moon_mean_longitude.decimal_degrees}°

    **********************************************************************************
    MOON ILLUMINATED FRACTION
    **********************************************************************************

    MOON ELONGATION FROM SUN:                     #{moon_elongation_from_sun.decimal_degrees}°
    MOON ILLUMINATED FRACTION:                    #{moon_illuminated_fraction}
    MOON PHASE ANGLE:                             #{moon_phase_angle.decimal_degrees}°
    MOON POSITION ANGLE OF BRIGHT LIMB            #{moon_position_angle_of_bright_limb.decimal_degrees}°

    **********************************************************************************
    EARTH POSITION VSOP87
    **********************************************************************************

    EARTH ECLIPTICAL LATITUDE VSOP87:             #{ecliptic_latitude_of_earth_using_vsop87.decimal_degrees}°
    EARTH ECLIPTICAL LONGITUDE VSOP87:            #{ecliptic_longitude_of_earth_using_vsop87.decimal_degrees}°
    EARTH RADIUS VECTOR VSOP87:                   #{radius_vector_of_earth_using_vsop87}
  HEREDOC
end