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Lunar Perigee And Apogee Ephemeris Calculator

Submitted on: 7/19/2019 3:06:08 PM
By: Jay Tanner  
Level: Advanced
User Rating: Unrated
Compatibility: PHP 7.0
Views: 1672
A PHP 7.x Astronomy Program by Jay Tanner - 2019
This program computes the dates and times of all the lunar perigees and
apogees for any given year in the 600-year period from 1600 to 2200 on
the standard Gregorian calendar.
The program is both tabular and visual, displaying the perigees and apogees
in tabular form and visually showing the relatively scaled phases of the moon
at each event.
The computations are based on the NASA/JPL DE405 ephemeris model and the NASA
polynomial expressions for remote Delta T estimation, to the nearest second.
The basic events are computed for three time scales (LT, UT and TT).
TZ = Local Time Zone Offset From UT (Neg/Pos = West/East)
LT = Local Time in the given TZ
UT = Universal Time (UT1)
TT = Standard Astronomical Atomic-Based Time Scale (Ephemeris Time)

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