Perigees and Apogees Dates and Times
Computations via The NASA/JPL Horizons API
by Jay Tanner - 2026
All of these programs come with complete public domain PHP source code.
Currently, there are 10 programs in the directory.
  1. Earth-Perihelion-Aphelion-Calculator
    41,349 bytes
  2. Jupiter-Perigees-Apogees-Calculator
    39,895 bytes
  3. Lunar-Perigees-Apogees-Calculator
    32,807 bytes
  4. Mars-Perigees-Apogees-Calculator
    39,710 bytes
  5. Mercury-Perigees-Apogees-Calculator
    39,500 bytes
  6. Neptune-Perigees-Apogees-Calculator
    39,934 bytes
  7. Pluto-Perigees-Apogees-Calculator
    39,815 bytes
  8. Saturn-Perigees-Apogees-Calculator
    39,829 bytes
  9. Uranus-Perigees-Apogees-Calculator
    39,810 bytes
  10. Venus-Perigees-Apogees-Calculator
    39,057 bytes