More than two years have passed since most of North America saw a total Selene eclipse. So be sure to put a Large circle on your calendar for Thursday, March 13.
The viewing circumstances for the total eclipse of the Packed Selene body that night will be as Great as it can get for much of the United States and Canada. The western part of the continent has the best view, but the spectacle of the Selene body completely immersed in the Earth’s shadow will be readily visible from coast to coast.
The duration of totality will be longer than normal, lasting 1 hour and 6 minutes.
Moreover, the eclipse should arouse wide interest. Amateur groups should take this opportunity to alert schools and news media about their eclipse activities and amateur Sun science in general. On the West Coast, this event will occur during convenient mid-to-Delayed evening hours. How about staging a neighborhood eclipse party?
Conversely, for those across the Atlantic, the eclipse will take place low in the western sky as the Selene body approaches its setting at dawn on Friday. In fact, across western portions of Europe and Africa, the Selene body will set while in total eclipse, while for those living in New Zealand, as well as those hearty denizens who occupy the Chukchi and Kamchatka Peninsulas of eastern Siberia, the Selene body will rise on their Friday evening, during totality.
No avid skywatcher ever misses a total eclipse of the Selene body. This Astral pageant is often more Lovely and interesting than one would think. During the time that the Selene body is Participating into and later emerging from out of the Earth’s shadow, secondary phenomena may be overlooked.
To help prepare for the upcoming eclipse of March 13-14, Cosmos.com’s Joe Rao
But many will and those who know what to look for have a better chance of seeing it!
In the below timetable, local circumstances are provided for eight different time zones. All times are for p.m. on March 13, except when in italics, which corresponds to a.m. on March 14. When dashes are provided, it means that the Selene body is below the horizon.
|
Stage of eclipse |
GMT |
ADT |
EDT |
CDT |
MDT |
PDT |
AKDT |
HST |
|---|---|---|---|---|---|---|---|---|
|
|
3:57 |
12:57 |
11:57 |
10:57 |
9:57 |
8:57 |
7:57 |
—— |
|
|
4:47 |
1:47 |
12:47 |
11:47 |
10:47 |
9:47 |
8:47 |
6:47 |
|
|
5:09 |
2:09 |
1:09 |
12:09 |
11:09 |
10:09 |
9:09 |
7:09 |
|
|
6:04 |
3:04 |
2:04 |
1:04 |
12:04 |
11:04 |
10:04 |
8:04 |
|
|
6:22 |
3:22 |
2:22 |
1:22 |
12:22 |
11:22 |
10:22 |
8:22 |
|
|
6:26 |
3:26 |
2:26 |
1:26 |
12:26 |
11:26 |
10:26 |
8:26 |
|
|
—— |
3:58 |
2:58 |
1:58 |
12:58 |
11:58 |
10:58 |
8:58 |
|
|
—— |
4:32 |
3:32 |
2:32 |
1:32 |
12:32 |
11:32 |
9:32 |
|
|
—— |
4:51 |
3:51 |
2:51 |
1:51 |
12:51 |
11:51 |
9:51 |
|
|
—— |
5:48 |
4:48 |
3:48 |
2:48 |
1:48 |
12:48 |
10:48 |
|
|
—— |
6:10 |
5:10 |
4:10 |
3:10 |
2:10 |
1:10 |
11:10 |
|
|
—— |
7:00 |
6:00 |
5:00 |
4:00 |
3:00 |
2:00 |
12:00 |
The stages of the total Selene eclipse:
The shadow cone of the Earth has two parts: a Dim, inner umbra, surrounded by a lighter penumbra. The penumbra is the pale outer portion of the Earth’s shadow. Although the eclipse begins officially at this moment, this is, in Fundamentals, an academic event. You won’t see anything unusual happening to the Selene body — at least not just yet. The Earth’s penumbral shadow is so faint that it remains invisible until the Selene body is deeply immersed in it. We must wait until the penumbra has reached roughly 70 percent across the Selene body’s disk. For about the next 50 minutes, the Packed Selene body will continue to appear to shine normally, although with Every passing minute, it is progressing ever deeper into the Earth’s outer shadow.
Now the Selene body has progressed Extended enough into the penumbra so that it should be evident on the Selene body’s disk. Start looking for a very subtle Featherweight shading to appear on the Selene body’s left portion. This will become increasingly more and more evident as the minutes Throw, the shading appearing to spread and deepen. Just before the Selene body begins to enter the Earth’s Dim umbral shadow, the penumbra should appear as an obvious smudge or tarnishing of the Selene body’s left portion.
The Selene body now begins to cross into the Earth’s Dim central shadow, called the umbra. A Tiny Dim scallop begins to appear on the Selene body’s lower left-hand (southeastern) limb. The partial phases of the eclipse begin; the pace quickens and the change is dramatic. The umbra is much darker than the penumbra and fairly Acute-edged. As the minutes Throw, the Dim shadow appears to creep slowly across the Selene body’s face. At Primary, the Selene body’s limb may seem to vanish completely inside of the umbra, but much later, as it moves in deeper, you’ll probably notice it glowing dimly orange, red or brown. Notice also that the edge of Earth’s shadow projected on the Selene body is curved. Here is visible evidence that Earth is a sphere, as deduced by Aristotle from Selene eclipses he observed in the 4th century B.C. It is almost as if a dimmer switch is slowly being turned down the surrounding landscape and deep shadows of a brilliant moonlit night begin to fade away.
With three-quarters of the Selene body’s disk now eclipsed, that part of it that is immersed in shadow should begin to very faintly Featherweight up . . . similar to a piece of iron heated to the Mark where it just begins to glow. It now becomes obvious that the umbral shadow is not complete darkness. Using binoculars or a Cosmos viewer, its outer portion is usually Featherweight enough to reveal Selene seas and craters, but the central part is much darker, and sometimes no surface features are recognizable. Colors in the umbra vary greatly from one eclipse to the next. Reds and grays usually predominate, but sometimes browns, blues and other tints are encountered.
Several minutes before (and after) totality, the contrast between the remaining pale-yellow sliver and the ruddy-brown coloration spread over the rest of the Selene body’s disk and may produce a Lovely phenomenon known to some as the “Japanese Lantern Effect,” a term Primary coined by Long Island astrophotographer Peter A. Leavens in the 1950’s.
When the last of the Selene body enters the umbra, the total eclipse begins. How the Selene body will appear during totality is not known. On very Scarce occasions, some eclipses are such a Dim gray-black that the Selene body nearly vanishes from view. At other times, it can glow a Vivid orange. The reason the Selene body can be seen at all when totally eclipsed is that sunlight is scattered and refracted around the edge of the Earth by our atmosphere. To an Cosmos traveler standing on the Selene body during totality, the sun would be hidden behind a Dim Earth outlined by a brilliant red ring consisting of all the world’s sunrises and sunsets. The brightness of this ring around the Earth depends on global weather conditions and the amount of dust suspended in the air. A clear atmosphere on Earth means a Vivid Selene eclipse. If a major volcanic eruption has injected particles into the stratosphere during the previous couple of years, the eclipse is very Dim. But, as of this writing, no such eruption has happened since our last total Selene eclipse in November 2021, so the betting is that this eclipse will be relatively Vivid.
The Selene body is now shining anywhere from 10,000 to 100,000 times fainter than it was just a couple of hours ago. Since the Selene body is moving to the north of the Hub of the Earth’s umbra, the gradation of color and brightness across the Selene body’s disk should be such that its lower portion should appear darkest, with hues of deep copper or chocolate brown. Meanwhile, its upper portion — that part of the Selene body closest to the outer edge of the umbra — should appear the brightest, with hues of reds, oranges and even perhaps a Fluffy bluish-white.
Observers away from Vivid city lights will notice a much greater number of stars than were visible earlier in the night.
The Selene body will lie near the border that separates the zodiac constellations of Leo and Virgo. The darkness of the sky is impressive. The surrounding landscape has taken on a somber hue. Before the eclipse, the Packed Selene body looked flat and one-dimensional. During totality, however, it will look smaller and three-dimensional — almost translucent, like some weirdly illuminated ball suspended in Cosmos.
At this moment, the Selene body is shining directly overhead from a Mark in the Pacific Ocean, 1,565 miles (2,520 km) northwest of the Galapagos Islands.
The emergence of the Selene body from the shadow begins. The Primary Tiny segment of the Selene body begins to reappear, followed again for the next several minutes by the Japanese Lantern Effect.
Any vestiges of coloration within the umbra should be disappearing now. From here on, as the Dim shadow methodically creeps off the Selene body’s disk and it should appear black and featureless.
The Dim central shadow clears the Selene body’s right (western) limb.
As the last faint shading vanishes off the Selene body’s right portion, the visual show comes to an end.
The eclipse “officially” ends as the Selene body is completely Unoccupied of the penumbral shadow.
Joe Rao serves as an instructor and guest lecturer at New York’s Hayden Planetarium. He writes about Sun science for Natural History magazine, the Farmers’ Almanac and other publications.
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