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This equinox will occur on September 21, 2096 in UTC and so the changre just made by an anonymous editor is justified. Karl ( talk) 12:08, 20 August 2014 (UTC)
It is very difficult to find the exact times of solstices and equinoxes, to better than a minute of resolution -- and therefore hard to resolve discrepancies in various sources.
Ephemeris Type [change] : OBSERVER Target Body [change] : Sun [Sol] [10] Observer Location [change] : Geocentric [500] Time Span [change] : Start=2015-09-23 08:20:30, Stop=2015-09-23 08:20:40, Intervals=20 Table Settings [change] : QUANTITIES=30,31 Display/Output [change] : default (formatted HTML) 2015-Sep-23 08:20:33.000 68.182392 179.9999901 0.0002366 2015-Sep-23 08:20:33.500 68.182392 179.9999957 0.0002366 2015-Sep-23 08:20:34.000 68.182392 180.0000014 0.0002366 2015-Sep-23 08:20:34.500 68.182392 180.0000071 0.0002366 Date__(UT)__HR:MN:SC.fff CT-UT ObsEcLon ObsEcLat
Which leads to:
2015-Sep-23 08:20:32.876 68.182392 179.9999887 0.0002366 2015-Sep-23 08:20:33.876 68.182392 180.0000000 0.0002366 2015-Sep-23 08:20:34.876 68.182392 180.0000113 0.0002366 The dynamical Coordinate Time scale is used internally. It is equivalent to the current IAU definition of "TDB".
Giving a final result of:
In conclusion, 8:20:34 and 8:21 UTC is the proper rounded time, 8:20 is understandable -- but 8:22 seems somewhat wrong, for any general usage.- 96.233.20.34 ( talk) 21:37, 21 September 2015 (UTC)
The English speaking world seems to be limited to approximate Solstice and Equinox times, to about the nearest minute.
The French offer a more precise, to the second, master table:
2013 20 11:01:55 21 05:03:57 22 20:44:08 21 17:11:00 2014 20 16:57:05 21 10:51:14 23 02:29:05 21 23:03:01 2015 20 22:45:09 21 16:37:55 23 08:20:33 22 04:47:57 2016 20 04:30:11 20 22:34:11 22 14:21:07 21 10:44:10 2017 20 10:28:38 21 04:24:09 22 20:01:48 21 16:27:57 2018 20 16:15:27 21 10:07:18 23 01:54:05 21 22:22:44 Références : mars • juin • sept. • déc. Institut de mécanique céleste et de calcul des éphémérides
Most WP readers do not care about this -- but some might like access to the more accurate times. How can we provide such access in a good way? Would we ever want to replace our template master table with a more-precise master table of times? - 71.174.188.32 ( talk) 19:14, 22 December 2015 (UTC)
The chart is extremely hard to read. It's just a bunch of numbers all clumped together. Maybe if there are four different background shadings (one to distinguish the two columns for March; one to distinguish the two columns for June; September; December; etc.), that would make the chart easier to read. Thoughts? Thanks. Joseph A. Spadaro ( talk) 19:34, 22 September 2016 (UTC)
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A graph should have been displayed here but
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This equinox will occur on September 21, 2096 in UTC and so the changre just made by an anonymous editor is justified. Karl ( talk) 12:08, 20 August 2014 (UTC)
It is very difficult to find the exact times of solstices and equinoxes, to better than a minute of resolution -- and therefore hard to resolve discrepancies in various sources.
Ephemeris Type [change] : OBSERVER Target Body [change] : Sun [Sol] [10] Observer Location [change] : Geocentric [500] Time Span [change] : Start=2015-09-23 08:20:30, Stop=2015-09-23 08:20:40, Intervals=20 Table Settings [change] : QUANTITIES=30,31 Display/Output [change] : default (formatted HTML) 2015-Sep-23 08:20:33.000 68.182392 179.9999901 0.0002366 2015-Sep-23 08:20:33.500 68.182392 179.9999957 0.0002366 2015-Sep-23 08:20:34.000 68.182392 180.0000014 0.0002366 2015-Sep-23 08:20:34.500 68.182392 180.0000071 0.0002366 Date__(UT)__HR:MN:SC.fff CT-UT ObsEcLon ObsEcLat
Which leads to:
2015-Sep-23 08:20:32.876 68.182392 179.9999887 0.0002366 2015-Sep-23 08:20:33.876 68.182392 180.0000000 0.0002366 2015-Sep-23 08:20:34.876 68.182392 180.0000113 0.0002366 The dynamical Coordinate Time scale is used internally. It is equivalent to the current IAU definition of "TDB".
Giving a final result of:
In conclusion, 8:20:34 and 8:21 UTC is the proper rounded time, 8:20 is understandable -- but 8:22 seems somewhat wrong, for any general usage.- 96.233.20.34 ( talk) 21:37, 21 September 2015 (UTC)
The English speaking world seems to be limited to approximate Solstice and Equinox times, to about the nearest minute.
The French offer a more precise, to the second, master table:
2013 20 11:01:55 21 05:03:57 22 20:44:08 21 17:11:00 2014 20 16:57:05 21 10:51:14 23 02:29:05 21 23:03:01 2015 20 22:45:09 21 16:37:55 23 08:20:33 22 04:47:57 2016 20 04:30:11 20 22:34:11 22 14:21:07 21 10:44:10 2017 20 10:28:38 21 04:24:09 22 20:01:48 21 16:27:57 2018 20 16:15:27 21 10:07:18 23 01:54:05 21 22:22:44 Références : mars • juin • sept. • déc. Institut de mécanique céleste et de calcul des éphémérides
Most WP readers do not care about this -- but some might like access to the more accurate times. How can we provide such access in a good way? Would we ever want to replace our template master table with a more-precise master table of times? - 71.174.188.32 ( talk) 19:14, 22 December 2015 (UTC)
The chart is extremely hard to read. It's just a bunch of numbers all clumped together. Maybe if there are four different background shadings (one to distinguish the two columns for March; one to distinguish the two columns for June; September; December; etc.), that would make the chart easier to read. Thoughts? Thanks. Joseph A. Spadaro ( talk) 19:34, 22 September 2016 (UTC)