April 1903 lunar eclipse
Template:Short description Template:Infobox lunar eclipse A partial lunar eclipse occurred at the Moon’s ascending node of orbit on Sunday, April 12, 1903,[1] with an umbral magnitude of 0.9677. A lunar eclipse occurs when the Moon moves into the Earth's shadow, causing the Moon to be darkened. A partial lunar eclipse occurs when one part of the Moon is in the Earth's umbra, while the other part is in the Earth's penumbra. Unlike a solar eclipse, which can only be viewed from a relatively small area of the world, a lunar eclipse may be viewed from anywhere on the night side of Earth. The Moon's apparent diameter was near the average diameter because it occurred 6.2 days after perigee (on April 5, 1903, at 18:45 UTC) and 7.1 days before apogee (on April 19, 1903, at 4:35 UTC).[2]
This nearly total lunar eclipse of Lunar Saros 130 preceded the first total eclipse of the series on April 22, 1921.
It occurred on Easter Sunday (Gregorian only), for the first time since 1846.[3]Template:Rp
Visibility
The eclipse was completely visible over eastern South America, Africa, Europe, and Antarctica, seen rising over western South America and much of North America and setting over much of Asia and western Australia.[4]
| File:Lunar eclipse from moon-1903Apr12.png File:Lunar eclipse chart close-1903Apr12.png |
Eclipse details
Shown below is a table displaying details about this particular solar eclipse. It describes various parameters pertaining to this eclipse.[5]
| Parameter | Value |
|---|---|
| Penumbral Magnitude | 1.98771 |
| Umbral Magnitude | 0.96765 |
| Gamma | 0.47981 |
| Sun Right Ascension | 01h17m19.0s |
| Sun Declination | +08°10'13.1" |
| Sun Semi-Diameter | 15'57.3" |
| Sun Equatorial Horizontal Parallax | 08.8" |
| Moon Right Ascension | 13h17m50.3s |
| Moon Declination | -07°43'47.7" |
| Moon Semi-Diameter | 15'38.4" |
| Moon Equatorial Horizontal Parallax | 0°57'24.1" |
| ΔT | 1.6 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.
| March 29 Descending node (new moon) |
April 12 Ascending node (full moon) |
|---|---|
| File:SE1903Mar29A.png | File:Lunar eclipse chart close-1903Apr12.png |
| Annular solar eclipse Solar Saros 118 |
Partial lunar eclipse |
Related eclipses
Eclipses in 1903
- An annular solar eclipse on March 29.
- A partial lunar eclipse on April 12.
- A total solar eclipse on September 21.
- A partial lunar eclipse on October 6.
Metonic
- Preceded by: Lunar eclipse of June 23, 1899
- Followed by: Lunar eclipse of January 29, 1907
Tzolkinex
- Preceded by: Lunar eclipse of February 28, 1896
- Followed by: Lunar eclipse of May 24, 1910
Half-Saros
- Preceded by: Solar eclipse of April 6, 1894
- Followed by: Solar eclipse of April 17, 1912
Tritos
- Preceded by: Lunar eclipse of May 11, 1892
- Followed by: Lunar eclipse of March 12, 1914
Lunar Saros 130
- Preceded by: Lunar eclipse of March 30, 1885
- Followed by: Lunar eclipse of April 22, 1921
Inex
- Preceded by: Lunar eclipse of May 1, 1874
- Followed by: Lunar eclipse of March 22, 1932
Triad
- Preceded by: Lunar eclipse of June 10, 1816
- Followed by: Lunar eclipse of February 9, 1990
Lunar eclipses of 1901–1904
This eclipse is a member of a semester series. An eclipse in a semester series of lunar eclipses repeats approximately every 177 days and 4 hours (a semester) at alternating nodes of the Moon's orbit.[6]
The penumbral lunar eclipse on March 2, 1904 occurs in the next lunar year eclipse set.
Saros 130
This eclipse is a part of Saros series 130, repeating every 18 years, 11 days, and containing 71 events. The series started with a penumbral lunar eclipse on June 10, 1416. It contains partial eclipses from September 4, 1560 through April 12, 1903; total eclipses from April 22, 1921 through September 11, 2155; and a second set of partial eclipses from September 21, 2173 through May 10, 2552. The series ends at member 71 as a penumbral eclipse on July 26, 2678.
The longest duration of totality will be produced by member 35 at 101 minutes, 53 seconds on June 26, 2029. All eclipses in this series occur at the Moon’s ascending node of orbit.[7]
| Greatest | First | |||
|---|---|---|---|---|
| File:Lunar eclipse chart close-29jun26.png The greatest eclipse of the series will occur on 2029 Jun 26, lasting 101 minutes, 53 seconds.[8] |
Penumbral | Partial | Total | Central |
| 1416 Jun 10 |
1560 Sep 04 |
1921 Apr 22 File:Lunar eclipse chart close-1921Apr22.png |
1975 May 25 File:Lunar eclipse chart close-1975May25.png | |
| Last | ||||
| Central | Total | Partial | Penumbral | |
| 2083 Jul 29 File:Lunar eclipse chart close-2083Jul29.png |
2155 Sep 11 |
2552 May 10 |
2678 Jul 26 | |
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.
Tritos series
Template:Lunar Tritos series July 2001
Inex series
Template:Lunar Inex series January 2019
Half-Saros cycle
A lunar eclipse will be preceded and followed by solar eclipses by 9 years and 5.5 days (a half saros).[9] This lunar eclipse is related to two hybrid solar eclipses of Solar Saros 137.
| April 6, 1894 | April 17, 1912 |
|---|---|
| File:SE1894Apr06H.png | File:SE1912Apr17H.png |
See also
Notes
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- ↑ Listing of Eclipses of series 130
- ↑ Mathematical Astronomy Morsels, Jean Meeus, p.110, Chapter 18, The half-saros
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