Version 4.20

• Added methods to calculate the contrast reserve and the magnification of an object. The contrast reserve tells how easy it is to detect an object.
• If the contrast difference is < 0, the object is not visible, contrast difference < -0.2 : Not visible, -0.2 < contrast diff < 0.1 : questionable, 0.10 < contrast diff < 0.35 : Difficult, 0.35 < contrast diff < 0.5 : Quite difficult to see, 0.50 < contr diff < 1.0 : Easy to see, 1.00 < contrast diff : Very easy to see

Version 4.19.1

• Obliquity is not needed as parameter in the calculateEquatorialCoordinates method of Planet and Elliptic

Version 4.19

• Added methods to calculate the Equatorial coordinates of the planets for a given date.
• Added Elliptic class, describing an object moving in an elliptic orbit. An add method to calculate the coordinates.

Version 4.18

• Added methods to calculate the heliocentric coordinates of the planets.

Version 4.17

• Added classes for the planets:
  • Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune
• Added method to calculate the mean orbital parameters of the planets for a given date.

Version 4.16

• Added method to calculate the eccentric anomaly using the equation of Kepler
  • Target::eccentricAnomaly()

Version 4.15

• Added method to calculate the ephemeris for physical observations of the sun
  • getPhysicalEphemeris()

Version 4.14

• Added method to calculate the equation of time
• Added methods to print the coordinates without seconds:
  • convertToShortHours()
  • convertToShortDegrees()

Version 4.13

• Added methods to get the start of the seasons:
  • Time::getWinter()
  • Time::getSpring()
  • Time::getSummer()
  • Time::getAutumn()

Version 4.12

• Add method to calculate the rectangular coordinates of the sun
• Add RectangularCoordinates class