/**
 @module Mercury
 */

import { Equinox, PlanetConstants, PlanetOrbitalElements } from '@/types'

/**
 * Planet constants, copied from the JPL
 * Reference: {@link https://ssd.jpl.nasa.gov/?planet_phys_par}
 * @property {Kilometer} equatorialRadius Planet's equatorial radius
 * @property {Kilometer} meanRadius Planet's mean radius
 * @property {Kilogram24} mass Planet's mass
 * @property {GramPerCubicCentimeter} bulkDensity Planet's bulk density
 * @property {Day} siderealRotationPeriod Planet's sidereal rotation period
 * @property {Year} siderealOrbitPeriod Planet's orbit rotation period
 * @property {Magnitude} visualMagnitude Planet's visual magnitude
 * @property {Albedo} geometricAlbedo Planet's geometric albedo
 * @property {MeterPerSquareSecond} equatorialGravity Planet's equatorial gravity
 * @property {KilometerPerSecond} Planet's escale velocity
 * @memberof module:Mercury
 */
export const constants: PlanetConstants = {
  equatorialRadius: 2440.53,
  meanRadius: 2439.4,
  mass: 0.330114,
  bulkDensity: 5.4291,
  siderealRotationPeriod: 58.6462,
  siderealOrbitPeriod: 0.2408467,
  visualMagnitude: -0.60,
  geometricAlbedo: 0.106,
  equatorialGravity: 3.70,
  escapeVelocity: 4.25
}


/**
 * Orbital Elements for the mean equinox of date and std J2000
 * Reference: Astronomical Algorithms, J. Meus, pp. 212-215 (Table 31.A & 31.B).
 * @memberof module:Mercury
 */
export const orbitalElements: PlanetOrbitalElements = {
  semiMajorAxis: [0.387_098_310, 0, 0, 0],
  eccentricity: [0.205_631_75, 0.000_020_407, -0.000_000_0283, -0.000_000_000_18],
  
  [Equinox.MeanOfTheDate]: {
    meanLongitude: [252.250_906, 149474.072_2491, 0.000_303_50, 0.000_000_018],
    inclination: [7.004_986, 0.001_8215, -0.000_018_10, 0.000_000_056],
    longitudeOfAscendingNode: [48.330_893, 1.186_1883, 0.000_175_42, 0.000_000_215],
    longitudeOfPerihelion: [77.456_119, 1.556_4776, 0.000_295_44, 0.000_000_009]
  },
  
  [Equinox.StandardJ2000]: {
    meanLongitude: [252.250_906, 149472.674_6358, -0.000_005_36, 0.000_000_002],
    inclination: [7.004_986, -0.005_9516, 0.000_000_80, 0.000_000_043],
    longitudeOfAscendingNode: [48.330_893, -0.125_4227, -0.000_088_33, -0.000_000_200],
    longitudeOfPerihelion: [77.456_119, 0.158_8643, -0.000_013_42, -0.000_000_007]
  }
}