April 1903 lunar eclipse
| Partial eclipse | |||||||||||||
 The Moon's hourly motion shown right to left | |||||||||||||
| Date | April 12, 1903 | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Gamma | 0.4798 | ||||||||||||
| Magnitude | 0.9677 | ||||||||||||
| Saros cycle | 130 (28 of 72) | ||||||||||||
| Partiality | 196 minutes, 31 seconds | ||||||||||||
| Penumbral | 330 minutes, 6 seconds | ||||||||||||
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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.
Visibility
[edit]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.[3]
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Eclipse details
[edit]Shown below is a table displaying details about this particular solar eclipse. It describes various parameters pertaining to this eclipse.[4]
| 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
[edit]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) |
|---|---|
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| Annular solar eclipse Solar Saros 118 |
Partial lunar eclipse |
Related eclipses
[edit]Eclipses in 1903
[edit]- 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
[edit]- Preceded by: Lunar eclipse of June 23, 1899
- Followed by: Lunar eclipse of January 29, 1907
Tzolkinex
[edit]- Preceded by: Lunar eclipse of February 28, 1896
- Followed by: Lunar eclipse of May 24, 1910
Half-Saros
[edit]- Preceded by: Solar eclipse of April 6, 1894
- Followed by: Solar eclipse of April 17, 1912
Tritos
[edit]- Preceded by: Lunar eclipse of May 11, 1892
- Followed by: Lunar eclipse of March 12, 1914
Lunar Saros 130
[edit]- Preceded by: Lunar eclipse of March 30, 1885
- Followed by: Lunar eclipse of April 22, 1921
Inex
[edit]- Preceded by: Lunar eclipse of May 1, 1874
- Followed by: Lunar eclipse of March 22, 1932
Triad
[edit]- Preceded by: Lunar eclipse of June 10, 1816
- Followed by: Lunar eclipse of February 9, 1990
Lunar eclipses of 1901–1904
[edit]![[icon]](/wiki/File:Wiki_letter_w_cropped.svg){kind=small} | This section is empty. You can help by adding to it. (December 2024) |
Saros 130
[edit]Lunar saros series 130, repeating every 18 years and 11 days, has a total of 71 lunar eclipse events including 56 umbral lunar eclipses (42 partial lunar eclipses and 14 total lunar eclipses). Solar Saros 137 interleaves with this lunar saros with an event occurring every 9 years 5 days alternating between each saros series.
| Greatest | First | |||
|---|---|---|---|---|
 The greatest eclipse of the series will occur on 2029 Jun 26, lasting 102 minutes.[5] |
Penumbral | Partial | Total | Central |
| 1416 Jun 10 | 1560 Sep 4 | 1921 Apr 22
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1957 May 13
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| Last | ||||
| Central | Total | Partial | Penumbral | |
2083 Jul 29
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2155 Sep 11 | 2552 May 10 | 2678 Jul 26 | |
| 1903 Apr 12 | 1921 Apr 22 | 1939 May 3 | |||
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| 1957 May 13 | 1975 May 25 | 1993 Jun 4 | |||
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| 2011 Jun 15 | 2029 Jun 26 | 2047 Jul 7 | |||
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| 2065 Jul 17 | 2083 Jul 29 | ||||
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Half-Saros cycle
[edit]A lunar eclipse will be preceded and followed by solar eclipses by 9 years and 5.5 days (a half saros).[6] This lunar eclipse is related to two hybrid solar eclipses of Solar Saros 137.
| April 6, 1894 | April 17, 1912 |
|---|---|
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See also
[edit]Notes
[edit]- ^ "April 11–12, 1903 Partial Lunar Eclipse". timeanddate. Retrieved 16 December 2024.
- ^ "Moon Distances for London, United Kingdom, England". timeanddate. Retrieved 16 December 2024.
- ^ "Partial Lunar Eclipse of 1903 Apr 12" (PDF). NASA. Retrieved 16 December 2024.
- ^ "Partial Lunar Eclipse of 1903 Apr 12". EclipseWise.com. Retrieved 16 December 2024.
- ^ Listing of Eclipses of cycle 130
- ^ Mathematical Astronomy Morsels, Jean Meeus, p.110, Chapter 18, The half-saros
External links
[edit]- 1903 Apr 12 chart Eclipse Predictions by Fred Espenak, NASA/GSFC
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