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413 lines
21 KiB
413 lines
21 KiB
define(function() {
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/*
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Moon phase data model and various utility methods.
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Accessible properties:
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-> functions
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update_moon_calculations()
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moon_phase_name()
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-> Julian Date
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julian_date
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-> Age
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days_old
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hours_old
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minutes_old
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-> Lunation
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phase_of_moon
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lunation
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-> Visibility
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percent_of_full_moon
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-> Selenography
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selenographic_deg
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west_or_east
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rise_or_set
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-> Next new-moon
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days_until_new_moon
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next_new_moon_date
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-> Next full-moon
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days_until_full_moon
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next_full_moon_date
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-> Next lunar-eclipse
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days_until_lunar_eclipse
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next_lunar_eclipse_date
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-> Next solar-eclipse
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days_until_solar_eclipse
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next_solar_eclipse_date
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*/
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'use strict';
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var self = {};
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var new_moon_array, full_moon_array, first_quarter_array, last_quarter_array;
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var currOffset = (new Date()).getTimezoneOffset() * 60;
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/*
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Init hard coded, tuples for New, First Quarter, Full Last
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Quarter Moon UTC data.
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T2018 to T2028 data from
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http://sunearth.gsfc.nasa.gov/eclipse/phase/phasecat.html (now
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only found on web.archive.org) algorithms used in predicting
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the phases of the Moon and eclipses are based on Jean Meeus'
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Astronomical Algorithms (Willmann-Bell, Inc.,T1998). All
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calculations are by Fred Espenak, and he assumes full
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responsibility for their accuracy. Permission is freely
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granted to reproduce this data when accompanied by an
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acknowledgment.
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Data is all UTC and in YYYY-MM-DD HH:MM format, with New and
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Full Moon arrays with an extra end character for eclipse types
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T=Total (Solar), A=Annular (Solar), H=Hybrid (Solar
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Annular/Total), P=Partial (Solar), t=Total (Lunar Umbral),
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p=Partial (Lunar Umbral), n=Penumbral (Lunar), _=none.
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*/
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new_moon_array = ["2018-01-17T02:17Z_", "2018-02-15T21:05ZP", "2018-03-17T13:12Z_", "2018-04-16T01:57Z_", "2018-05-15T11:48Z_", "2018-06-13T19:43Z_", "2018-07-13T02:48ZP", "2018-08-11T09:58ZP", "2018-09-09T18:01Z_", "2018-10-09T03:47Z_", "2018-11-07T16:02Z_", "2018-12-07T07:20Z_", "2019-01-06T01:28ZP", "2019-02-04T21:04Z_", "2019-03-06T16:04Z_", "2019-04-05T08:50Z_", "2019-05-04T22:45Z_", "2019-06-03T10:02Z_", "2019-07-02T19:16ZT", "2019-08-01T03:12Z_", "2019-08-30T10:37Z_", "2019-09-28T18:26Z_", "2019-10-28T03:38Z_", "2019-11-26T15:06Z_", "2019-12-26T05:13ZA", "2020-01-24T21:42Z_", "2020-02-23T15:32Z_", "2020-03-24T09:28Z_", "2020-04-23T02:26Z_", "2020-05-22T17:39Z_", "2020-06-21T06:41ZA", "2020-07-20T17:33Z_", "2020-08-19T02:41Z_", "2020-09-17T11:00Z_", "2020-10-16T19:31Z_", "2020-11-15T05:07Z_", "2020-12-14T16:17ZT", "2021-01-13T05:00Z_", "2021-02-11T19:06Z_", "2021-03-13T10:21Z_", "2021-04-12T02:31Z_", "2021-05-11T19:00Z_", "2021-06-10T10:53ZA", "2021-07-10T01:17Z_", "2021-08-08T13:50Z_", "2021-09-07T00:52Z_", "2021-10-06T11:05Z_", "2021-11-04T21:15Z_", "2021-12-04T07:43ZT", "2022-01-02T18:33Z_", "2022-02-01T05:46Z_", "2022-03-02T17:35Z_", "2022-04-01T06:24Z_", "2022-04-30T20:28ZP", "2022-05-30T11:30Z_", "2022-06-29T02:52Z_", "2022-07-28T17:55Z_", "2022-08-27T08:17Z_", "2022-09-25T21:54Z_", "2022-10-25T10:49ZP", "2022-11-23T22:57Z_", "2022-12-23T10:17Z_", "2023-01-21T20:53Z_", "2023-02-20T07:06Z_", "2023-03-21T17:23Z_", "2023-04-20T04:12ZH", "2023-05-19T15:53Z_", "2023-06-18T04:37Z_", "2023-07-17T18:32Z_", "2023-08-16T09:38Z_", "2023-09-15T01:40Z_", "2023-10-14T17:55ZA", "2023-11-13T09:27Z_", "2023-12-12T23:32Z_", "2024-01-11T11:57Z_", "2024-02-09T22:59Z_", "2024-03-10T09:00Z_", "2024-04-08T18:21ZT", "2024-05-08T03:22Z_", "2024-06-06T12:38Z_", "2024-07-05T22:57Z_", "2024-08-04T11:13Z_", "2024-09-03T01:55Z_", "2024-10-02T18:49ZA", "2024-11-01T12:47Z_", "2024-12-01T06:21Z_", "2024-12-30T22:27Z_"];
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full_moon_array = ["2018-01-02T02:24Z_", "2018-01-31T13:27Zt", "2018-03-02T00:51Z_", "2018-03-31T12:37Z_", "2018-04-30T00:58Z_", "2018-05-29T14:20Z_", "2018-06-28T04:53Z_", "2018-07-27T20:20Zt", "2018-08-26T11:56Z_", "2018-09-25T02:53Z_", "2018-10-24T16:45Z_", "2018-11-23T05:39Z_", "2018-12-22T17:49Z_", "2019-01-21T05:16Zt", "2019-02-19T15:53Z_", "2019-03-21T01:43Z_", "2019-04-19T11:12Z_", "2019-05-18T21:11Z_", "2019-06-17T08:31Z_", "2019-07-16T21:38Zp", "2019-08-15T12:29Z_", "2019-09-14T04:33Z_", "2019-10-13T21:08Z_", "2019-11-12T13:34Z_", "2019-12-12T05:12Z_", "2020-01-10T19:21Zn", "2020-02-09T07:33Z_", "2020-03-09T17:48Z_", "2020-04-08T02:35Z_", "2020-05-07T10:45Z_", "2020-06-05T19:12Zn", "2020-07-05T04:44Zn", "2020-08-03T15:59Z_", "2020-09-02T05:22Z_", "2020-10-01T21:05Z_", "2020-10-31T14:49Z_", "2020-11-30T09:30Zn", "2020-12-30T03:28Z_", "2021-01-28T19:16Z_", "2021-02-27T08:17Z_", "2021-03-28T18:48Z_", "2021-04-27T03:31Z_", "2021-05-26T11:14Zt", "2021-06-24T18:40Z_", "2021-07-24T02:37Z_", "2021-08-22T12:02Z_", "2021-09-20T23:55Z_", "2021-10-20T14:57Z_", "2021-11-19T08:58Zp", "2021-12-19T04:36Z_", "2022-01-17T23:49Z_", "2022-02-16T16:57Z_", "2022-03-18T07:17Z_", "2022-04-16T18:55Z_", "2022-05-16T04:14Zt", "2022-06-14T11:52Z_", "2022-07-13T18:37Z_", "2022-08-12T01:36Z_", "2022-09-10T09:59Z_", "2022-10-09T20:55Z_", "2022-11-08T11:02Zt", "2022-12-08T04:08Z_", "2023-01-06T23:08Z_", "2023-02-05T18:29Z_", "2023-03-07T12:40Z_", "2023-04-06T04:35Z_", "2023-05-05T17:34Zn", "2023-06-04T03:42Z_", "2023-07-03T11:39Z_", "2023-08-01T18:31Z_", "2023-08-31T01:35Z_", "2023-09-29T09:57Z_", "2023-10-28T20:24Zp", "2023-11-27T09:16Z_", "2023-12-27T00:33Z_", "2024-01-25T17:54Z_", "2024-02-24T12:30Z_", "2024-03-25T07:00Zn", "2024-04-23T23:49Z_", "2024-05-23T13:53Z_", "2024-06-22T01:08Z_", "2024-07-21T10:17Z_", "2024-08-19T18:26Z_", "2024-09-18T02:34Zp", "2024-10-17T11:26Z_", "2024-11-15T21:29Z_", "2024-12-15T09:02Z_"];
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first_quarter_array = ["2018-01-24T22:20Z", "2018-02-23T08:09Z", "2018-03-24T15:35Z", "2018-04-22T21:46Z", "2018-05-22T03:49Z", "2018-06-20T10:51Z", "2018-07-19T19:52Z", "2018-08-18T07:49Z", "2018-09-16T23:15Z", "2018-10-16T18:02Z", "2018-11-15T14:54Z", "2018-12-15T11:49Z", "2019-01-14T06:45Z", "2019-02-12T22:26Z", "2019-03-14T10:27Z", "2019-04-12T19:06Z", "2019-05-12T01:12Z", "2019-06-10T05:59Z", "2019-07-09T10:55Z", "2019-08-07T17:31Z", "2019-09-06T03:10Z", "2019-10-05T16:47Z", "2019-11-04T10:23Z", "2019-12-04T06:58Z", "2020-01-03T04:45Z", "2020-02-02T01:42Z", "2020-03-02T19:57Z", "2020-04-01T10:21Z", "2020-04-30T20:38Z", "2020-05-30T03:30Z", "2020-06-28T08:16Z", "2020-07-27T12:32Z", "2020-08-25T17:58Z", "2020-09-24T01:55Z", "2020-10-23T13:23Z", "2020-11-22T04:45Z", "2020-12-21T23:41Z", "2021-01-20T21:02Z", "2021-02-19T18:47Z", "2021-03-21T14:40Z", "2021-04-20T06:59Z", "2021-05-19T19:13Z", "2021-06-18T03:54Z", "2021-07-17T10:11Z", "2021-08-15T15:20Z", "2021-09-13T20:39Z", "2021-10-13T03:25Z", "2021-11-11T12:46Z", "2021-12-11T01:36Z", "2022-01-09T18:11Z", "2022-02-08T13:50Z", "2022-03-10T10:45Z", "2022-04-09T06:47Z", "2022-05-09T00:21Z", "2022-06-07T14:48Z", "2022-07-07T02:14Z", "2022-08-05T11:06Z", "2022-09-03T18:08Z", "2022-10-03T00:14Z", "2022-11-01T06:37Z", "2022-11-30T14:36Z", "2022-12-30T01:21Z", "2023-01-28T15:19Z", "2023-02-27T08:06Z", "2023-03-29T02:32Z", "2023-04-27T21:20Z", "2023-05-27T15:22Z", "2023-06-26T07:50Z", "2023-07-25T22:07Z", "2023-08-24T09:57Z", "2023-09-22T19:32Z", "2023-10-22T03:29Z", "2023-11-20T10:50Z", "2023-12-19T18:39Z", "2024-01-18T03:53Z", "2024-02-16T15:01Z", "2024-03-17T04:11Z", "2024-04-15T19:13Z", "2024-05-15T11:48Z", "2024-06-14T05:18Z", "2024-07-13T22:49Z", "2024-08-12T15:19Z", "2024-09-11T06:06Z", "2024-10-10T18:55Z", "2024-11-09T05:56Z", "2024-12-08T15:27Z"];
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last_quarter_array = ["2018-01-08T22:25Z", "2018-02-07T15:54Z", "2018-03-09T11:20Z", "2018-04-08T07:18Z", "2018-05-08T02:09Z", "2018-06-06T18:32Z", "2018-07-06T07:51Z", "2018-08-04T18:18Z", "2018-09-03T02:37Z", "2018-10-02T09:45Z", "2018-10-31T16:40Z", "2018-11-30T00:19Z", "2018-12-29T09:34Z", "2019-01-27T21:10Z", "2019-02-26T11:28Z", "2019-03-28T04:10Z", "2019-04-26T22:18Z", "2019-05-26T16:33Z", "2019-06-25T09:46Z", "2019-07-25T01:18Z", "2019-08-23T14:56Z", "2019-09-22T02:41Z", "2019-10-21T12:39Z", "2019-11-19T21:11Z", "2019-12-19T04:57Z", "2020-01-17T12:58Z", "2020-02-15T22:17Z", "2020-03-16T09:34Z", "2020-04-14T22:56Z", "2020-05-14T14:03Z", "2020-06-13T06:24Z", "2020-07-12T23:29Z", "2020-08-11T16:45Z", "2020-09-10T09:26Z", "2020-10-10T00:39Z", "2020-11-08T13:46Z", "2020-12-08T00:37Z", "2021-01-06T09:37Z", "2021-02-04T17:37Z", "2021-03-06T01:30Z", "2021-04-04T10:02Z", "2021-05-03T19:50Z", "2021-06-02T07:24Z", "2021-07-01T21:11Z", "2021-07-31T13:16Z", "2021-08-30T07:13Z", "2021-09-29T01:57Z", "2021-10-28T20:05Z", "2021-11-27T12:28Z", "2021-12-27T02:24Z", "2022-01-25T13:41Z", "2022-02-23T22:32Z", "2022-03-25T05:37Z", "2022-04-23T11:56Z", "2022-05-22T18:43Z", "2022-06-21T03:11Z", "2022-07-20T14:18Z", "2022-08-19T04:36Z", "2022-09-17T21:52Z", "2022-10-17T17:15Z", "2022-11-16T13:27Z", "2022-12-16T08:56Z", "2023-01-15T02:10Z", "2023-02-13T16:01Z", "2023-03-15T02:08Z", "2023-04-13T09:11Z", "2023-05-12T14:28Z", "2023-06-10T19:31Z", "2023-07-10T01:48Z", "2023-08-08T10:28Z", "2023-09-06T22:21Z", "2023-10-06T13:48Z", "2023-11-05T08:37Z", "2023-12-05T05:49Z", "2024-01-04T03:30Z", "2024-02-02T23:18Z", "2024-03-03T15:24Z", "2024-04-02T03:15Z", "2024-05-01T11:27Z", "2024-05-30T17:13Z", "2024-06-28T21:53Z", "2024-07-28T02:51Z", "2024-08-26T09:26Z", "2024-09-24T18:50Z", "2024-10-24T08:03Z", "2024-11-23T01:28Z", "2024-12-22T22:18Z"];
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self.update_moon_calculations = function() {
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/*
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Generate all Moon data ready for display.
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*/
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var currDate = (new Date().getTime()) / 1000;
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var SECONDS_PER_DAY = 86400;
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var last_new_moon_sec = last_new_moon_sec_at_time(currDate);
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var next_new_moon_sec = next_new_moon_sec_at_time(currDate);
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var last_full_moon_sec = last_full_moon_sec_at_time(currDate);
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var next_full_moon_sec = next_full_moon_sec_at_time(currDate);
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var last_quarter_moon_sec = last_quarter_moon_sec_at_time(currDate);
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var next_quarter_moon_sec = next_quarter_moon_sec_at_time(currDate);
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/* Calculate phase percent of Moon based on nearest two data values */
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if (next_full_moon_sec <= next_new_moon_sec) {
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if (next_quarter_moon_sec <= next_full_moon_sec) {
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self.phase_of_moon = (last_new_moon_sec / (last_new_moon_sec + next_quarter_moon_sec)) * 0.25;
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} else {
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self.phase_of_moon = (last_quarter_moon_sec / (last_quarter_moon_sec + next_full_moon_sec)) * 0.25 + 0.25;
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}
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} else {
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if (next_quarter_moon_sec <= next_new_moon_sec) {
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self.phase_of_moon = (last_full_moon_sec / (last_full_moon_sec + next_quarter_moon_sec)) * 0.25 + 0.5;
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} else {
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self.phase_of_moon = (last_quarter_moon_sec / (last_quarter_moon_sec + next_new_moon_sec)) * 0.25 + 0.75;
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}
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}
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/* Generate interesting human readable values */
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self.percent_of_full_moon = (Math.cos(((self.phase_of_moon + 0.5) / 0.5 * Math.PI)) + 1) * 0.5;
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self.julian_date = 2452135 + ((currDate - 997700400) / SECONDS_PER_DAY);
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self.lunation = lunation_at_time(currDate);
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var day_with_fraction = last_new_moon_sec / SECONDS_PER_DAY;
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self.days_old = Math.floor(day_with_fraction);
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self.hours_old = Math.floor((day_with_fraction - self.days_old) * 24);
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self.minutes_old = Math.floor((((day_with_fraction - self.days_old) * 24) - self.hours_old) * 60);
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self.days_until_new_moon = next_new_moon_sec / SECONDS_PER_DAY;
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self.next_new_moon_date = currDate + next_new_moon_sec - correct_for_tz_and_dst(currDate + next_new_moon_sec);
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self.days_until_full_moon = next_full_moon_sec / SECONDS_PER_DAY;
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self.next_full_moon_date = currDate + next_full_moon_sec - correct_for_tz_and_dst(currDate + next_full_moon_sec);
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/* Eclipse information */
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self.next_lunar_eclipse_sec = next_lunar_eclipse_sec_at_time(currDate);
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var next_solar_eclipse_sec = next_solar_eclipse_sec_at_time(currDate);
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self.last_lunar_eclipse_sec = last_lunar_eclipse_sec_at_time(currDate);
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self.days_until_lunar_eclipse = self.next_lunar_eclipse_sec / SECONDS_PER_DAY;
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self.next_lunar_eclipse_date = currDate + self.next_lunar_eclipse_sec - correct_for_tz_and_dst(currDate + self.next_lunar_eclipse_sec);
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self.days_until_solar_eclipse = next_solar_eclipse_sec / SECONDS_PER_DAY;
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self.next_solar_eclipse_date = currDate + next_solar_eclipse_sec - correct_for_tz_and_dst(currDate + next_solar_eclipse_sec);
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/* Selenographic terminator longitude */
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var selenographic_tmp = 270 + (self.phase_of_moon * 360);
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if (selenographic_tmp >= 360) {
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selenographic_tmp -= 360;
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}
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if (selenographic_tmp >= 270) {
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selenographic_tmp -= 360;
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} else if (selenographic_tmp >= 180) {
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selenographic_tmp -= 180;
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} else if (selenographic_tmp >= 90) {
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selenographic_tmp -= 180;
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}
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selenographic_tmp = -selenographic_tmp;
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if (selenographic_tmp < 0) {
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self.west_or_east = "west";
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} else {
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self.west_or_east = "east";
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}
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self.selenographic_deg = Math.abs(selenographic_tmp);
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if (self.phase_of_moon >= 0.5) {
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self.rise_or_set = "Sunset";
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} else {
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self.rise_or_set = "Sunrise";
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}
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};
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function correct_for_tz_and_dst(date_sec_of_event) {
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/*
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Time-zone and/or daylight-saving correction (internal data is UTC).
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*/
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return currOffset;
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// if (time.daylight === 0 || time.localtime(date_sec_of_event)[8] === 0) {
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// /* Time-zone correction */
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// return time.timezone;
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// } else {
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// /* Time-zone & daylight saving correction */
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// return time.altzone;
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// }
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}
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self.moon_phase_name = function() {
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/*
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Return the moon image name for a given phase value.
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*/
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if (self.phase_of_moon >= 0 && self.phase_of_moon < 0.025) {
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return "phase-0";
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// return "New Moon";
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} else if (self.phase_of_moon >= 0.025 && self.phase_of_moon < 0.225) {
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return "phase-1";
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// return "Waxing Crescent";
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} else if (self.phase_of_moon >= 0.225 && self.phase_of_moon < 0.275) {
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return "phase-2";
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// return "First Quarter";
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} else if (self.phase_of_moon >= 0.275 && self.phase_of_moon < 0.475) {
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return "phase-3";
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// return "Waxing Gibbous";
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} else if (self.phase_of_moon >= 0.475 && self.phase_of_moon < 0.525) {
|
|
return "phase-4";
|
|
// return "Full Moon";
|
|
} else if (self.phase_of_moon >= 0.525 && self.phase_of_moon < 0.735) {
|
|
return "phase-5";
|
|
// return "Waning Gibbous";
|
|
} else if (self.phase_of_moon >= 0.735 && self.phase_of_moon < 0.775) {
|
|
return "phase-6";
|
|
// return "Last Quarter";
|
|
} else if (self.phase_of_moon >= 0.775 && self.phase_of_moon < 0.975) {
|
|
return "phase-7";
|
|
// return "Waning Crescent";
|
|
} else {
|
|
return "phase-0";
|
|
// return "New Moon";
|
|
}
|
|
};
|
|
|
|
|
|
function next_full_moon_sec_at_time(now) {
|
|
/*
|
|
Return seconds to the next Full Moon.
|
|
*/
|
|
|
|
var next;
|
|
for (var i = 0; i < full_moon_array.length; i++) {
|
|
var date_string = full_moon_array[i];
|
|
next = Date.parse(date_string.slice(0, -1)) / 1000 + currOffset;
|
|
if (next >= now) {
|
|
break;
|
|
}
|
|
}
|
|
return next - now;
|
|
}
|
|
|
|
|
|
function next_new_moon_sec_at_time(now) {
|
|
/*
|
|
Return seconds to the next New Moon.
|
|
*/
|
|
|
|
var next;
|
|
for (var i = 0; i < new_moon_array.length; i++) {
|
|
var date_string = new_moon_array[i];
|
|
next = Date.parse(date_string.slice(0, -1)) / 1000 + currOffset;
|
|
if (next >= now) {
|
|
break;
|
|
}
|
|
}
|
|
return next - now;
|
|
}
|
|
|
|
|
|
function next_quarter_moon_sec_at_time(now) {
|
|
/*
|
|
Return seconds to the next Quater Moon phase (could be First or Last).
|
|
*/
|
|
|
|
var next1, next2;
|
|
for (var i = 0; i < first_quarter_array.length; i++) {
|
|
var date_string = first_quarter_array[i];
|
|
next1 = Date.parse(date_string) / 1000 + currOffset;
|
|
if (next1 >= now) {
|
|
break;
|
|
}
|
|
}
|
|
for (var i = 0; i < last_quarter_array.length; i++) {
|
|
var date_string = last_quarter_array[i];
|
|
next2 = Date.parse(date_string) / 1000 + currOffset;
|
|
if (next2 >= now) {
|
|
break;
|
|
}
|
|
}
|
|
var next = Math.min(next1, next2);
|
|
return next - now;
|
|
}
|
|
|
|
|
|
function last_full_moon_sec_at_time(now) {
|
|
/*
|
|
Return (positive) seconds since the last Full Moon.
|
|
*/
|
|
|
|
var last;
|
|
for (var i = 0; i < full_moon_array.length; i++) {
|
|
var date_string = full_moon_array[i];
|
|
var then = Date.parse(date_string.slice(0, -1)) / 1000 + currOffset;
|
|
if (then >= now) {
|
|
break;
|
|
}
|
|
last = then;
|
|
}
|
|
return now - last;
|
|
}
|
|
|
|
|
|
function last_new_moon_sec_at_time(now) {
|
|
/*
|
|
Return (positive) seconds since the last New Moon.
|
|
*/
|
|
|
|
var last;
|
|
for (var i = 0; i < new_moon_array.length; i++) {
|
|
var date_string = new_moon_array[i];
|
|
var then = Date.parse(date_string.slice(0, -1)) / 1000 + currOffset;
|
|
if (then >= now) {
|
|
break;
|
|
}
|
|
last = then;
|
|
}
|
|
return now - last;
|
|
}
|
|
|
|
|
|
function last_quarter_moon_sec_at_time(now) {
|
|
/*
|
|
Return (positive) seconds to the last Quater Moon phase (could be First or Last).
|
|
*/
|
|
|
|
var last1, last2;
|
|
for (var i = 0; i < first_quarter_array.length; i++) {
|
|
var date_string = first_quarter_array[i];
|
|
var then = Date.parse(date_string) / 1000 + currOffset;
|
|
if (then >= now) {
|
|
break;
|
|
}
|
|
last1 = then;
|
|
}
|
|
for (var i = 0; i < last_quarter_array.length; i++) {
|
|
var date_string = last_quarter_array[i];
|
|
var then = Date.parse(date_string) / 1000 + currOffset;
|
|
if (then >= now) {
|
|
break;
|
|
}
|
|
last2 = then;
|
|
}
|
|
var last = Math.max(last1, last2);
|
|
return now - last;
|
|
}
|
|
|
|
|
|
function lunation_at_time(now) {
|
|
/*
|
|
Return lunation number, 0 started on Dec 18, 1922, current data set starts as 2008
|
|
*/
|
|
|
|
self.lunation = 1051;
|
|
for (var i = 0; i < new_moon_array.length; i++) {
|
|
var date_string = new_moon_array[i];
|
|
var next = Date.parse(date_string.slice(0, -1)) / 1000 + currOffset;
|
|
if (next >= now) {
|
|
break;
|
|
}
|
|
self.lunation += 1;
|
|
}
|
|
return self.lunation;
|
|
}
|
|
|
|
|
|
function next_lunar_eclipse_sec_at_time(now) {
|
|
/*
|
|
Return (positive) seconds to the next Lunar eclipe or -1.
|
|
*/
|
|
|
|
for (var i = 0; i < full_moon_array.length; i++) {
|
|
var date_string = full_moon_array[i];
|
|
if (date_string.slice(-1) !== "_") {
|
|
var next = Date.parse(date_string.slice(0, -1)) / 1000 + currOffset;
|
|
if (next >= now) {
|
|
console.log(new Date(1000*next))
|
|
return next - now;
|
|
}
|
|
}
|
|
}
|
|
return -1;
|
|
}
|
|
|
|
|
|
function last_lunar_eclipse_sec_at_time(now) {
|
|
/*
|
|
Return (positive) seconds to the last Lunar eclipe or -1.
|
|
*/
|
|
|
|
var last = -1;
|
|
for (var i = 0; i < full_moon_array.length; i++) {
|
|
var date_string = full_moon_array[i];
|
|
if (date_string.slice(-1) !== "_") {
|
|
var then = Date.parse(date_string.slice(0, -1)) / 1000 + currOffset;
|
|
if (then >= now) {
|
|
break;
|
|
}
|
|
last = then;
|
|
}
|
|
}
|
|
if (last === -1) {
|
|
return -1;
|
|
} else {
|
|
return now - last;
|
|
}
|
|
}
|
|
|
|
|
|
function next_solar_eclipse_sec_at_time(now) {
|
|
/*
|
|
Return (positive) seconds to the next Solar eclipe or -1.
|
|
*/
|
|
|
|
for (var i = 0; i < new_moon_array.length; i++) {
|
|
var date_string = new_moon_array[i];
|
|
if (date_string.slice(-1) !== "_") {
|
|
var next = Date.parse(date_string.slice(0, -1)) / 1000 + currOffset;
|
|
if (next >= now) {
|
|
return next - now;
|
|
}
|
|
}
|
|
}
|
|
return -1;
|
|
}
|
|
|
|
return self;
|
|
});
|