Solar eclipse of April 8, 1921
Template:Short description Script error: No such module "Solar eclipse". An annular solar eclipse occurred at the Moon's descending node of orbit on Friday, April 8, 1921,[1] with a magnitude of 0.9753. A solar eclipse occurs when the Moon passes between Earth and the Sun, thereby totally or partly obscuring the image of the Sun for a viewer on Earth. An annular solar eclipse occurs when the Moon's apparent diameter is smaller than the Sun's, blocking most of the Sun's light and causing the Sun to look like an annulus (ring). An annular eclipse appears as a partial eclipse over a region of the Earth thousands of kilometres wide. The Moon's apparent diameter was near the average diameter because it occurred 6.5 days after apogee (on April 1, 1921, at 20:50 UTC) and 8.3 days before perigee (on April 16, 1921, at 16:10 UTC).[2]
Annularity was visible from northern Scotland, northwestern tip of Norway, and islands in the Arctic Ocean in Russian SFSR. A partial eclipse was visible for parts of North Africa, Europe, Central Asia, and the Russian SFSR.
Eclipse details
Shown below are two tables displaying details about this particular solar eclipse. The first table outlines times at which the moon's penumbra or umbra attains the specific parameter, and the second table describes various other parameters pertaining to this eclipse.[3]
| Event | Time (UTC) |
|---|---|
| First Penumbral External Contact | 1921 April 8 at 06:51:44.6 UTC |
| First Umbral External Contact | 1921 April 8 at 08:21:25.5 UTC |
| First Central Line | 1921 April 8 at 08:23:38.1 UTC |
| Greatest Duration | 1921 April 8 at 08:23:38.1 UTC |
| First Umbral Internal Contact | 1921 April 8 at 08:25:55.2 UTC |
| Ecliptic Conjunction | 1921 April 8 at 09:05:08.6 UTC |
| Greatest Eclipse | 1921 April 8 at 09:15:01.3 UTC |
| Equatorial Conjunction | 1921 April 8 at 09:44:56.4 UTC |
| Last Umbral Internal Contact | 1921 April 8 at 10:03:48.2 UTC |
| Last Central Line | 1921 April 8 at 10:06:02.5 UTC |
| Last Umbral External Contact | 1921 April 8 at 10:08:12.1 UTC |
| Last Penumbral External Contact | 1921 April 8 at 11:37:57.8 UTC |
| Parameter | Value |
|---|---|
| Eclipse Magnitude | 0.97530 |
| Eclipse Obscuration | 0.95120 |
| Gamma | 0.88692 |
| Sun Right Ascension | 01h06m22.7s |
| Sun Declination | +07°03'40.4" |
| Sun Semi-Diameter | 15'58.0" |
| Sun Equatorial Horizontal Parallax | 08.8" |
| Moon Right Ascension | 01h05m24.3s |
| Moon Declination | +07°51'45.1" |
| Moon Semi-Diameter | 15'28.0" |
| Moon Equatorial Horizontal Parallax | 0°56'45.6" |
| ΔT | 22.3 s |
Eclipse season
Script error: No such module "Labelled list hatnote". This eclipse is part of an eclipse season, a period, roughly every six months, when eclipses occur. Only two (or occasionally three) eclipse seasons occur each year, and each season lasts about 35 days and repeats just short of six months (173 days) later; thus two full eclipse seasons always occur each year. Either two or three eclipses happen each eclipse season. In the sequence below, each eclipse is separated by a fortnight.
| April 8 Descending node (new moon) |
April 22 Ascending node (full moon) |
|---|---|
| File:SE1921Apr08A.png | File:Lunar eclipse chart close-1921Apr22.png |
| Annular solar eclipse Solar Saros 118 |
Total lunar eclipse Lunar Saros 130 |
Related eclipses
Eclipses in 1921
- An annular solar eclipse on April 8.
- A total lunar eclipse on April 22.
- A total solar eclipse on October 1.
- A partial lunar eclipse on October 16.
Metonic
- Preceded by: Solar eclipse of June 19, 1917
- Followed by: Solar eclipse of January 24, 1925
Tzolkinex
- Preceded by: Solar eclipse of February 25, 1914
- Followed by: Solar eclipse of May 19, 1928
Half-Saros
- Preceded by: Lunar eclipse of April 1, 1912
- Followed by: Lunar eclipse of April 13, 1930
Tritos
- Preceded by: Solar eclipse of May 9, 1910
- Followed by: Solar eclipse of March 7, 1932
Solar Saros 118
- Preceded by: Solar eclipse of March 29, 1903
- Followed by: Solar eclipse of April 19, 1939
Inex
- Preceded by: Solar eclipse of April 26, 1892
- Followed by: Solar eclipse of March 18, 1950
Triad
- Preceded by: Solar eclipse of June 7, 1834
- Followed by: Solar eclipse of February 7, 2008
Solar eclipses of 1921–1924
This eclipse is a member of a semester series. An eclipse in a semester series of solar eclipses repeats approximately every 177 days and 4 hours (a semester) at alternating nodes of the Moon's orbit.[4]
The partial solar eclipse on July 31, 1924 occurs in the next lunar year eclipse set.
| Solar eclipse series sets from 1921 to 1924 | ||||||
|---|---|---|---|---|---|---|
| Descending node | Ascending node | |||||
| Saros | Map | Gamma | Saros | Map | Gamma | |
| 118 | April 8, 1921 File:SE1921Apr08A.png Annular |
0.8869 | 123 | October 1, 1921 File:SE1921Oct01T.png Total |
−0.9383 | |
| 128 | March 28, 1922 File:SE1922Mar28A.png Annular |
0.1711 | 133 | September 21, 1922 File:SE1922Sep21T.png Total |
−0.213 | |
| 138 | March 17, 1923 File:SE1923Mar17A.png Annular |
−0.5438 | 143 | September 10, 1923 File:SE1923Sep10T.png Total |
0.5149 | |
| 148 | March 5, 1924 File:SE1924Mar05P.png Partial |
−1.2232 | 153 | August 30, 1924 File:SE1924Aug30P.png Partial |
1.3123 | |
Saros 118
Template:Solar Saros series 118
Metonic series
Template:Solar Metonic series 1902–1989
Tritos series
Template:Solar Tritos series 2008 August 1
Inex series
Template:Solar Inex series 2008 February 7
Notes
<templatestyles src="Reflist/styles.css" />
Script error: No such module "Check for unknown parameters".
References
- Earth visibility chart and eclipse statistics Eclipse Predictions by Fred Espenak, NASA/GSFC
Script error: No such module "Navbox".
Script error: No such module "Side box".