equinox – A Darker View

Autumnal Equinox

The fall equinox will occur at 21:50HST today.

The equinox is defined as the time at which the Sun passes through the plane of the Earth’s equator. Until the next spring equinox occurs in 2020, the Sun will be located in the southern hemisphere with a negative declination coordinate.

Today the length of the day and night will be very near equal, thus the term equinox. the Sun will rise and set nearly exactly due east and due west.

Today is considered the start of fall for most cultures in the northern hemisphere, or the start of spring for those in the southern hemisphere.

2019 Apsides and Seasons
Event	Universal Time		Hawaii Standard Time
Perihelion	Jan 03	05:20UT	Jan 02	19:20HST
Spring Equinox	Mar 20	21:58UT	Mar 20	11:58HST
Summer Solstice	Jun 21	15:54UT	Jun 21	05:54HST
Aphelion	Jul 04	22:11UT	Jul 04	12:11HST
Fall Equinox	Sep 23	07:50UT	Sep 22	21:50HST
Winter Solstice	Dec 22	04:19UT	Dec 21	18:19HST
Data from US Naval Observatory Data Services

Vernal Equinox

The spring equinox will occur at 19:20HST today.

The equinox is defined as the time at which the Sun passes through the plane of the Earth’s equator. Until the fall equinox occurs on Sep 22nd, the Sun will be located in the northern hemisphere with a positive declination coordinate.

Today the length of the day and night will be very near equal, thus the term equinox. the Sun will rise and set nearly exactly due east and due west.

Today is considered the start of spring for most cultures in the northern hemisphere, or the start of fall for those in the southern hemisphere.

2019 Apsides and Seasons
Event	Universal Time		Hawaii Standard Time
Perihelion	Jan 03	05:20UT	Jan 02	19:20HST
Spring Equinox	Mar 20	21:58UT	Mar 20	11:58HST
Summer Solstice	Jun 21	15:54UT	Jun 21	05:54HST
Aphelion	Jul 04	22:11UT	Jul 04	12:11HST
Fall Equinox	Sep 23	07:50UT	Sep 22	21:50HST
Winter Solstice	Dec 22	04:19UT	Dec 21	18:19HST
Data from US Naval Observatory Data Services

Autumnal Equinox

Fall equinox occurs today at 10:02HST. Today there will be little difference between the length of the night compared to number of daylight hours. This is the first day of fall as marked by many cultures in the northern hemisphere.

2017 Solstices and Equinoxes
	UT		HST
Perihelion	Jan 4	14:18UT	Jan 4	04:18HST
Vernal Equinox	Mar 20	10:29UT	Mar 20	00:29HST
Summer Solstice	Jun 21	04:24UT	Jun 20	18:24HST
Apehelion	Jul 3	20:11UT	Jul 3	10:11HST
Autumnal Equinox	Sep 22	20:02UT	Sep 22	10:02HST
Winter Solstice	Dec 21	16:28UT	Dec 21	06:28HST
Source: USNO data Services

Summer Solstice

Summer solstice occurs today at 18:24HST. Today the Sun will occupy the most northerly position in the sky of the year. The term solstice comes from the latin terms Sol (the Sun) and sistere (to stand still). On this day the Sun seems to stand still as it stops moving northwards each day and begins move to the south. This is the first day of summer as marked by many cultures in the northern hemisphere. Alternately this is the first day of winter for those living south of the equator.

This year many calendars will mark September 21st as the summer solstice, and so it is for much of the world. Here in Hawaiʻi the solstice actually occurs on the 20th when considering the time zone differences.

2017 Solstices and Equinoxes
	UT		HST
Perihelion	Jan 4	14:18UT	Jan 4	04:18HST
Vernal Equinox	Mar 20	10:29UT	Mar 20	00:29HST
Summer Solstice	Jun 21	04:24UT	Jun 20	18:24HST
Apehelion	Jul 3	20:11UT	Jul 3	10:11HST
Autumnal Equinox	Sep 22	20:02UT	Sep 22	10:02HST
Winter Solstice	Dec 21	16:28UT	Dec 21	06:28HST
Source: USNO data Services

Vernal Equinox

The vernal or spring equinox occurs today at 00:29HST. Today there will be little difference between the length of the night when counted against the number of daylight hours. This is the first day of spring as marked by many cultures in the northern hemisphere.

2017 Solstices and Equinoxes
	UT		HST
Perihelion	Jan 4	14:18UT	Jan 4	04:18HST
Vernal Equinox	Mar 20	10:29UT	Mar 20	00:29HST
Summer Solstice	Jun 21	04:24UT	Jun 20	18:24HST
Apehelion	Jul 3	20:11UT	Jul 3	10:11HST
Autumnal Equinox	Sep 22	20:02UT	Sep 22	10:02HST
Winter Solstice	Dec 21	16:28UT	Dec 21	06:28HST
Source: USNO data Services

Autumnal Equinox

Fall equinox occurs today at 04:21HST. Today there will be little difference between the length of the night compared to number of daylight hours. This is the first day of fall as marked by many cultures in the northern hemisphere.

This year many calendars will mark September 23rd as the beginning of fall, and so it is for much of the world. Here in Hawaiʻi the equinox actually occurs on the 22nd when considering the time zone differences.

2016 Solstices and Equinoxes
	UT		HST
Perihelion	Jan 2	22:49UT	Jan 2	12:49HST
Vernal Equinox	Mar 20	04:30UT	Mar 19	18:30HST
Summer Solstice	Jun 20	22:34UT	Jun 20	12:34HST
Apehelion	Jul 4	16:24UT	Jul 4	06:24HST
Autumnal Equinox	Sep 22	14:21UT	Sep 22	04:21HST
Winter Solstice	Dec 21	10:44UT	Dec 21	00:44HST

Source: USNO data Services

Summer Solstice

Summer solstice occurs today at 12:34HST. Today the Sun will occupy the most northerly position in the sky of the year. The term solstice comes from the latin terms Sol (the Sun) and sistere (to stand still). On this day the Sun seems to stand still as it stops moving northwards each day and begins move to the south. This is the first day of summer as marked by many cultures in the northern hemisphere. Alternately this is the first day of winter for those living south of the equator.

2016 Solstices and Equinoxes
	UT		HST
Perihelion	Jan 2	22:49UT	Jan 2	12:49HST
Vernal Equinox	Mar 20	04:30UT	Mar 19	18:30HST
Summer Solstice	Jun 20	22:34UT	Jun 20	12:34HST
Apehelion	Jul 4	16:24UT	Jul 4	06:24HST
Autumnal Equinox	Sep 22	14:21UT	Sep 22	04:21HST
Winter Solstice	Dec 21	10:44UT	Dec 21	00:44HST

Source: USNO data Services

Vernal Equinox

The vernal or spring equinox occurs today at 18:30HST. Today there will be little difference between the length of the night when counted against the number of daylight hours. This is the first day of spring as marked by many cultures in the northern hemisphere.

2016 Solstices and Equinoxes
	UT		HST
Perihelion	Jan 2	22:49UT	Jan 2	12:49HST
Vernal Equinox	Mar 20	04:30UT	Mar 19	18:30HST
Summer Solstice	Jun 20	22:34UT	Jun 20	12:34HST
Apehelion	Jul 4	16:24UT	Jul 4	06:24HST
Autumnal Equinox	Sep 22	14:21UT	Sep 22	04:21HST
Winter Solstice	Dec 21	10:44UT	Dec 21	00:44HST

Source: USNO data Services

Autumnal Equinox

Fall equinox occurs today at 22:20HST. Today there will be little difference between the length of the night compared to number of daylight hours. This is the first day of fall as marked by many cultures in the northern hemisphere.

2015 Solstices and Equinoxes
	UT		HST
Perihelion	Jan 4	08:59UT	Jan 3	22:59HST
Vernal Equinox	Mar 20	22:45UT	Mar 20	12:45HST
Summer Solstice	Jun 21	16:38UT	Jun 21	06:38HST
Apehelion	Jul 6	12:59UT	Jul 6	02:59HST
Autumnal Equinox	Sep 23	08:20UT	Sep 22	22:20HST
Winter Solstice	Dec 22	04:48UT	Dec 21	18:48HST

Source: NASA Sky Calendar

Summer Solstice

Summer solstice occurs today at 06:38HST. Today the Sun will occupy the most northerly position in the sky of the year. The term solstice comes from the latin terms Sol (the Sun) and sistere (to stand still). On this day the Sun seems to stand still as it stops moving northwards each day and begins move to the south. This is the first day of summer as marked by many cultures in the northern hemisphere. Alternately this is the first day of winter for those living south of the equator.

2015 Solstices and Equinoxes
	UT		HST
Perihelion	Jan 4	08:59UT	Jan 3	22:59HST
Vernal Equinox	Mar 20	22:45UT	Mar 20	12:45HST
Summer Solstice	Jun 21	16:38UT	Jun 21	06:38HST
Apehelion	Jul 6	12:59UT	Jul 6	02:59HST
Autumnal Equinox	Sep 23	08:20UT	Sep 22	22:20HST
Winter Solstice	Dec 22	04:48UT	Dec 21	18:48HST

Source: NASA Sky Calendar