Home

Site Map

Search

physics,
                      astronomy, sun, moon, earth, seasons
GeoAstro
Applets

Astronomy
physics,
                    astronomy, sun, moon, earth, seasons
Chaos Game
physics,
                      astronomy, sun, moon, earth, seasons
Java
physics,
                    astronomy, sun, moon, earth, seasons
Miscel-

laneous
physics,
                      astronomy, sun, moon, earth, seasons
Physics Quiz


Date of Equinoxes and Solstices from 2000 to 2999:



The times of equinoxes and solstices in 2000 to 2999 are computed, using the algorithm of Meeus, Astronimical Algorithms, by my Seasons Applet in Dynamical Time (TD) because the difference ∆T = TD - UT can not be predicted for the distant future.
In 2017 January ∆T is 68.6 s. The forecast of U.S. Naval Obsevatory extends until 2026, ∆T=73 s, with an error of 5 s.

2050 MICA
TD
Applet
TD
CalSky
∆T=0
spring Mar 20
10:21
10:21:03 10:19.7
summer Jun 21
03:34
03:34:27 03:33.1
autumn Sep 22
19:30 19:29:56 19:28.6
winter Dec 21
16:40 16:39:53 16:38.8

According to Meeus the largest error for the years 1951 - 2050 is 51 s for March equinox, 39 s for June solstice, 44 s for September equinox, and 41 s for December solstice.
With events near midnight the frequencies shown below may vary by ±1.

spring equinox

spring march 19          spring march 21


summer solstice

summer June 19          summer June 22

autumn equinox

autumn September 21          autumn September 24

winter solstice

winter december 20          winter december 23

Updated 2017, Feb 06

email