Partial eclipse | |||||||||||||
The Moon's hourly motion shown right to left | |||||||||||||
Date | April 13, 1930 | ||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Gamma | 0.9545 | ||||||||||||
Magnitude | 0.1065 | ||||||||||||
Saros cycle | 111 (62 of 71) | ||||||||||||
Partiality | 73 minutes, 22 seconds | ||||||||||||
Penumbral | 267 minutes, 18 seconds | ||||||||||||
| |||||||||||||
← November 1929October 1930 → |
A partial lunar eclipse occurred at the Moon’s descending node of orbit on Sunday, April 13, 1930, with an umbral magnitude of 0.1065. 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. Occurring about 3.8 days after perigee (on April 9, 1930, at 11:20 UTC), the Moon's apparent diameter was larger.
Visibility
The eclipse was completely visible over North and South America, seen rising over eastern Australia and the central Pacific Ocean and setting over much of Europe and Africa.
Eclipse details
Shown below is a table displaying details about this particular solar eclipse. It describes various parameters pertaining to this eclipse.
Parameter | Value |
---|---|
Penumbral Magnitude | 1.10669 |
Umbral Magnitude | 0.10650 |
Gamma | 0.95452 |
Sun Right Ascension | 01h23m32.1s |
Sun Declination | +08°47'25.3" |
Sun Semi-Diameter | 15'56.9" |
Sun Equatorial Horizontal Parallax | 08.8" |
Moon Right Ascension | 13h25m16.0s |
Moon Declination | -07°57'49.4" |
Moon Semi-Diameter | 15'56.7" |
Moon Equatorial Horizontal Parallax | 0°58'31.2" |
ΔT | 24.1 s |
Eclipse season
See also: Eclipse cycleThis 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 13 Descending node (full moon) |
April 28 Ascending node (new moon) |
---|---|
Partial lunar eclipse Lunar Saros 111 |
Hybrid solar eclipse Solar Saros 137 |
Related eclipses
Eclipses in 1930
- A partial lunar eclipse on April 13.
- A hybrid solar eclipse on April 28.
- A partial lunar eclipse on October 7.
- A total solar eclipse on October 21.
Metonic
- Preceded by: Lunar eclipse of June 25, 1926
- Followed by: Lunar eclipse of January 30, 1934
Tzolkinex
- Preceded by: Lunar eclipse of March 3, 1923
- Followed by: Lunar eclipse of May 25, 1937
Half-Saros
- Preceded by: Solar eclipse of April 8, 1921
- Followed by: Solar eclipse of April 19, 1939
Tritos
- Preceded by: Lunar eclipse of May 15, 1919
- Followed by: Lunar eclipse of March 13, 1941
Lunar Saros 111
- Preceded by: Lunar eclipse of April 1, 1912
- Followed by: Lunar eclipse of April 23, 1948
Inex
- Preceded by: Lunar eclipse of May 3, 1901
- Followed by: Lunar eclipse of March 24, 1959
Triad
- Preceded by: Lunar eclipse of June 12, 1843
- Followed by: Lunar eclipse of February 11, 2017
Lunar eclipses of 1930–1933
Descending node | Ascending node | |||||
---|---|---|---|---|---|---|
Saros | Date viewing |
Type chart |
Saros | Date viewing |
Type chart | |
111 | 1930 Apr 13 |
Partial |
116 | 1930 Oct 07 |
Partial | |
121 | 1931 Apr 02 |
Total |
126 | 1931 Sep 26 |
Total | |
131 | 1932 Mar 22 |
Partial |
136 | 1932 Sep 14 |
Partial | |
141 | 1933 Mar 12 |
Penumbral |
146 | 1933 Sep 04 |
Penumbral |
Saros 111
Lunar Saros 111, repeating every 18 years and 11 days, has a total of 71 lunar eclipse events including 11 total lunar eclipses. The first total lunar eclipse of this series was on April 19, 1353, and last was on August 4, 1533. The longest occurrence of this series was on June 12, 1443 when the totality lasted 106 minutes.
Half-Saros cycle
A lunar eclipse will be preceded and followed by solar eclipses by 9 years and 5.5 days (a half saros). This lunar eclipse is related to two total solar eclipses of Solar Saros 118.
April 8, 1921 | April 19, 1939 |
---|---|
See also
Notes
- "April 12–13, 1930 Partial Lunar Eclipse". timeanddate. Retrieved 16 December 2024.
- "Moon Distances for London, United Kingdom, England". timeanddate. Retrieved 16 December 2024.
- "Partial Lunar Eclipse of 1930 Apr 13" (PDF). NASA. Retrieved 16 December 2024.
- "Partial Lunar Eclipse of 1930 Apr 13". EclipseWise.com. Retrieved 16 December 2024.
- Mathematical Astronomy Morsels, Jean Meeus, p.110, Chapter 18, The half-saros
External links
- 1930 Apr 13 chart Eclipse Predictions by Fred Espenak, NASA/GSFC