local-sidereal-time

Local Sidereal Time (nmp module)

A small library to get the local sidereal time based at a given longitud and date.

It has a helper for getting the LST in hours and as a string up to in minutes resolution for GUI purposes.

This is an adaptation of partial AstroTime class done by <ict-scheduling [at] alma [dot] cl>

Original work was done by P.Grosbol, ESO, <pgrosbol [at] eso [dot] org>.

Installation

npm i -S local-sidereal-time

Usage

Given date should be UTC.

var lstjs = require('local-sidereal-time');
var date = new Date(Date.UTC(2019, 2, 5, 9, 22, 0, 0));
var lst_hours = lstjs.getLST(date, -67.75492777777778)
var lst_string = lstjs.lstString(date, -67.75492777777778);
# lst_string should be '15:42';

Tests

npm test

Contributing

In lieu of a formal style guide, take care to maintain the existing coding style. Add unit tests for any new or changed functionality. Lint and test your code, pull request as needed.

License

Original work is being licensed under GPL-2.0, this follows the same license, refer to GNU site for details.