Solar eclipse of May 18, 1920
| Partial eclipse | |
| Gamma | −1.0239 |
|---|---|
| Magnitude | 0.9734 |
| Maximum eclipse | |
| Coordinates | Lua error: callParserFunction: function "#coordinates" was not found. |
| Times (UTC) | |
| Greatest eclipse | 6:14:55 |
| References | |
| Saros | 146 (22 of 76) |
| Catalog # (SE5000) | 9328 |
A partial solar eclipse occurred at the Moon's descending node of orbit on Tuesday, May 18, 1920,[1] with a magnitude of 0.9734. 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. A partial solar eclipse occurs in the polar regions of the Earth when the center of the Moon's shadow misses the Earth.
A partial eclipse was visible for parts of Australia and Antarctica.
Eclipse details
[edit | edit source]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.[2]
| Event | Time (UTC) |
|---|---|
| First Penumbral External Contact | 1920 May 18 at 04:17:02.5 UTC |
| Equatorial Conjunction | 1920 May 18 at 06:00:25.5 UTC |
| Greatest Eclipse | 1920 May 18 at 06:14:55.0 UTC |
| Ecliptic Conjunction | 1920 May 18 at 06:25:08.5 UTC |
| Last Penumbral External Contact | 1920 May 18 at 08:12:51.9 UTC |
| Parameter | Value |
|---|---|
| Eclipse Magnitude | 0.97341 |
| Eclipse Obscuration | 0.97587 |
| Gamma | −1.02391 |
| Sun Right Ascension | 03h38m46.6s |
| Sun Declination | +19°29'30.0" |
| Sun Semi-Diameter | 15'48.4" |
| Sun Equatorial Horizontal Parallax | 08.7" |
| Moon Right Ascension | 03h39m22.1s |
| Moon Declination | +18°27'48.5" |
| Moon Semi-Diameter | 16'36.5" |
| Moon Equatorial Horizontal Parallax | 1°00'57.1" |
| ΔT | 21.6 s |
Eclipse season
[edit | edit source]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.
| May 3 Ascending node (full moon) |
May 18 Descending node (new moon) |
|---|---|
| File:Lunar eclipse chart close-1920May03.png | File:SE1920May18P.png |
| Total lunar eclipse Lunar Saros 120 |
Partial solar eclipse Solar Saros 146 |
Related eclipses
[edit | edit source]Eclipses in 1920
[edit | edit source]- A total lunar eclipse on May 3.
- A partial solar eclipse on May 18.
- A total lunar eclipse on October 27.
- A partial solar eclipse on November 10.
Metonic
[edit | edit source]- Preceded by: Solar eclipse of July 30, 1916
- Followed by: Solar eclipse of March 5, 1924
Tzolkinex
[edit | edit source]- Preceded by: Solar eclipse of April 6, 1913
- Followed by: Solar eclipse of June 29, 1927
Half-Saros
[edit | edit source]- Preceded by: Lunar eclipse of May 13, 1911
- Followed by: Lunar eclipse of May 23, 1929
Tritos
[edit | edit source]- Preceded by: Solar eclipse of June 17, 1909
- Followed by: Solar eclipse of April 18, 1931
Solar Saros 146
[edit | edit source]- Preceded by: Solar eclipse of May 7, 1902
- Followed by: Solar eclipse of May 29, 1938
Inex
[edit | edit source]- Preceded by: Solar eclipse of June 6, 1891
- Followed by: Solar eclipse of April 28, 1949
Triad
[edit | edit source]- Preceded by: Solar eclipse of July 17, 1833
- Followed by: Solar eclipse of March 19, 2007
Solar eclipses of 1916–1920
[edit | edit source]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.[3]
The solar eclipses on February 3, 1916 (total), July 30, 1916 (annular), January 23, 1917 (partial), and July 19, 1917 (partial) occur in the previous lunar year eclipse set.
| Solar eclipse series sets from 1916 to 1920 | ||||||
|---|---|---|---|---|---|---|
| Ascending node | Descending node | |||||
| Saros | Map | Gamma | Saros | Map | Gamma | |
| 111 | December 24, 1916 File:SE1916Dec24P.png Partial |
−1.5321 | 116 | June 19, 1917 File:SE1917Jun19P.png Partial |
1.2857 | |
| 121 | December 14, 1917 File:SE1917Dec14A.png Annular |
−0.9157 | 126 | June 8, 1918 File:SE1918Jun08T.png Total |
0.4658 | |
| 131 | December 3, 1918 File:SE1918Dec03A.png Annular |
−0.2387 | 136 File:1919 eclipse positive.jpg Totality in Príncipe |
May 29, 1919 File:SE1919May29T.png Total |
−0.2955 | |
| 141 | November 22, 1919 File:SE1919Nov22A.png Annular |
0.4549 | 146 | May 18, 1920 File:SE1920May18P.png Partial |
−1.0239 | |
| 151 | November 10, 1920 File:SE1920Nov10P.png Partial |
1.1287 | ||||
Saros 146
[edit | edit source]This eclipse is a part of Saros series 146, repeating every 18 years, 11 days, and containing 76 events. The series started with a partial solar eclipse on September 19, 1541. It contains total eclipses from May 29, 1938 through October 7, 2154; hybrid eclipses from October 17, 2172 through November 20, 2226; and annular eclipses from November 30, 2244 through August 10, 2659. The series ends at member 76 as a partial eclipse on December 29, 2893. Its eclipses are tabulated in three columns; every third eclipse in the same column is one exeligmos apart, so they all cast shadows over approximately the same parts of the Earth.
The longest duration of totality was produced by member 26 at 5 minutes, 21 seconds on June 30, 1992, and the longest duration of annularity will be produced by member 63 at 3 minutes, 30 seconds on August 10, 2659. All eclipses in this series occur at the Moon’s descending node of orbit.[4]
| Series members 16–37 occur between 1801 and 2200: | ||
|---|---|---|
| 16 | 17 | 18 |
| File:SE1801Apr13P.png March 13, 1812 |
File:SE1819Apr24P.png March 24, 1830 |
File:SE1837May04P.png April 3, 1848 |
| 19 | 20 | 21 |
| File:SE1855May16P.png April 15, 1866 |
File:SE1873May26P.png April 25, 1884 |
File:SE1902May07P.png May 7, 1902 |
| 22 | 23 | 24 |
| File:SE1920May18P.png May 18, 1920 |
File:SE1938May29T.png May 29, 1938 |
File:SE1956Jun08T.png June 8, 1956 |
| 25 | 26 | 27 |
| File:SE1974Jun20T.png June 20, 1974 |
File:SE1992Jun30T.png June 30, 1992 |
File:SE2010Jul11T.png July 11, 2010 |
| 28 | 29 | 30 |
| File:SE2028Jul22T.png July 22, 2028 |
File:SE2046Aug02T.png August 2, 2046 |
File:SE2064Aug12T.png August 12, 2064 |
| 31 | 32 | 33 |
| File:SE2082Aug24T.png August 24, 2082 |
File:SE2100Sep04T.png September 4, 2100 |
File:SE2118Sep15T.png September 15, 2118 |
| 34 | 35 | 36 |
| File:SE2136Sep26T.png September 26, 2136 |
File:SE2154Oct07T.png October 7, 2154 |
File:SE2172Oct17H.png October 17, 2172 |
| 37 | ||
| File:SE2190Oct29H.png October 29, 2190 | ||
Metonic series
[edit | edit source]The metonic series repeats eclipses every 19 years (6939.69 days), lasting about 5 cycles. Eclipses occur in nearly the same calendar date. In addition, the octon subseries repeats 1/5 of that or every 3.8 years (1387.94 days). All eclipses in this table occur at the Moon's descending node.
Tritos series
[edit | edit source]This eclipse is a part of a tritos cycle, repeating at alternating nodes every 135 synodic months (≈ 3986.63 days, or 11 years minus 1 month). Their appearance and longitude are irregular due to a lack of synchronization with the anomalistic month (period of perigee), but groupings of 3 tritos cycles (≈ 33 years minus 3 months) come close (≈ 434.044 anomalistic months), so eclipses are similar in these groupings.
The partial solar eclipse on November 4, 2116 (part of Saros 164) is also a part of this series but is not included in the table below.
Inex series
[edit | edit source]This eclipse is a part of the long period inex cycle, repeating at alternating nodes, every 358 synodic months (≈ 10,571.95 days, or 29 years minus 20 days). Their appearance and longitude are irregular due to a lack of synchronization with the anomalistic month (period of perigee). However, groupings of 3 inex cycles (≈ 87 years minus 2 months) comes close (≈ 1,151.02 anomalistic months), so eclipses are similar in these groupings.
| Series members between 1801 and 2200 | ||
|---|---|---|
| File:SE1804Aug05T.gif August 5, 1804 (Saros 142) |
File:SE1833Jul17T.gif July 17, 1833 (Saros 143) |
File:SE1862Jun27P.gif June 27, 1862 (Saros 144) |
| File:SE1891Jun06A.gif June 6, 1891 (Saros 145) |
File:SE1920May18P.png May 18, 1920 (Saros 146) |
File:SE1949Apr28P.png April 28, 1949 (Saros 147) |
| File:SE1978Apr07P.png April 7, 1978 (Saros 148) |
File:SE2007Mar19P.png March 19, 2007 (Saros 149) |
File:SE2036Feb27P.png February 27, 2036 (Saros 150) |
| File:SE2065Feb05P.png February 5, 2065 (Saros 151) |
File:SE2094Jan16T.png January 16, 2094 (Saros 152) |
File:Saros153 15van70 SE2122Dec28A.jpg December 28, 2122 (Saros 153) |
| File:Saros154 14van71 SE2151Dec08A.jpg December 8, 2151 (Saros 154) |
File:Saros155 15van71 SE2180Nov17T.jpg November 17, 2180 (Saros 155) |
|
Notes
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- ^ Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
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- ^ Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
References
[edit | edit source]- Earth visibility chart and eclipse statistics Eclipse Predictions by Fred Espenak, NASA/GSFC
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