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Darian System

This is module for Node.js to convert Earth time to Martian time in Darian system.

The Darian calendar is a proposed system of time-keeping on the planet Mars. It was created by aerospace engineer and political scientist Thomas Gangale in 1985. In 2002 he adopted the Telescopic Epoch, which is in 1609 in recognition of Johannes Kepler's use of Tycho Brahe's observations of Mars to elucidate the laws of planetary motion, and also Galileo Galilei's first observations of Mars with a telescope.

Usage

Clone repository to you node_modules folder or install using npm:

npm install darian-system
var ds = require('darian-system');

Class constructor can receive Date() object or date as arguments in syntax:

new Darian_Date(year[, month[, day[, hour[, min[, sec[, timeZoneModifier]]]]]])

timeZoneModifier for UTC+3 — 3, UTC-5 — -5 If the constructor receives an empty argument string, it will create an object for the current time.

var marsTime = new ds.Darian_Date();
console.log(marsTime.getDate());  // Sol Martis, 17 Mesha 217, 17:18:57

Methods of Darian_Date() object

  • .getDate()

Return date in format [dayOfWeek], [monthDay] [Month] [Year], [Hour]:[Min]:[Sec]

.getDate()  // Sol Mercurii, 04 Gemini 217, 03:42:40

  • .getJSON()

Return date as object like:

{
    dispThisSol: [value],             // Events on this sol
    dispThisDay: [value],             // Events on this day
    mYear: [value],                   // Mars year
    mMonth: [value],                  // Mars month number
    mMonthName: [value],              // Mars month name
    mDay: [value],                    // Mars day in month
    mJulianDay: [value],              // Julian Date
    mNumDay: [value],                 // Sol since beginning of the year
    mSolName: [value],                // Name of sol of the week
    mSolarLongitude: [value],         // Solar Longitude(degrees)
    mHour: [value],                   // Hours
    mMin: [value],                    // Minutes
    mSec: [value]                     // Seconds
}

  • .getDispThisSol()

Return events that occurred on this day of the sol(Mars year).

.getDispThisSol()  // On this sol in 197: Contact with Viking Orbiter 1 was lost after 1,469 sols in Mars orbit.

  • .getDispThisDay()

Return events that occurred on this day of the Earth year.

.getDispThisDay()  // On this day in 1999: Mars Polar Lander was launched.

Functions

  • convMarsToEarth()

Converts Martian Time to Earth Time. Receive Darian_Date() object or Darian_Date().getJSON() and returns Date() object of Earth Time.

var earthTime = ds.convMarsToEarth(marsTime);
console.log(earthTime);  // Wed Feb 07 2018 18:31:26 GMT+0300 (+03)

Credits

Based on Martian Date Calculator — Online converter developed by Alan Hensel and Thomas Gangale.