April 1967 lunar eclipse
Template:Short description Template:Infobox lunar eclipse A total lunar eclipse occurred at the Moon’s descending node of orbit on Monday, April 24, 1967,[1] with an umbral magnitude of 1.3356. A lunar eclipse occurs when the Moon moves into the Earth's shadow, causing the Moon to be darkened. A total lunar eclipse occurs when the Moon's near side entirely passes into the Earth's umbral shadow. 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. A total lunar eclipse can last up to nearly two hours, while a total solar eclipse lasts only a few minutes at any given place, because the Moon's shadow is smaller. Occurring only about 16 hours after perigee (on April 23, 1967, at 20:00 UTC), the Moon's apparent diameter was larger.[2]
This lunar eclipse was the first of a tetrad, with four total lunar eclipses in series, the others being on October 18, 1967; April 13, 1968; and October 6, 1968.
The Surveyor 3 probe was active on the Moon during this eclipse.[3]
Visibility
The eclipse was completely visible over northeast Asia, Australia, and much of the Pacific Ocean, seen rising over most of Asia and setting over North America and western and central South America.[4]
| File:Lunar eclipse from moon-1967Apr24.png File:Lunar eclipse chart close-1967Apr24.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 | 2.28924 |
| Umbral Magnitude | 1.33559 |
| Gamma | 0.29722 |
| Sun Right Ascension | 02h05m32.6s |
| Sun Declination | +12°43'38.7" |
| Sun Semi-Diameter | 15'54.1" |
| Sun Equatorial Horizontal Parallax | 08.7" |
| Moon Right Ascension | 14h06m04.6s |
| Moon Declination | -12°27'13.7" |
| Moon Semi-Diameter | 16'40.5" |
| Moon Equatorial Horizontal Parallax | 1°01'11.8" |
| ΔT | 37.7 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 24 Descending node (full moon) |
May 9 Ascending node (new moon) |
|---|---|
| File:Lunar eclipse chart close-1967Apr24.png | File:SE1967May09P.png |
| Total lunar eclipse Lunar Saros 121 |
Partial solar eclipse Solar Saros 147 |
Related eclipses
Eclipses in 1967
- A total lunar eclipse on April 24.
- A partial solar eclipse on May 9.
- A total lunar eclipse on October 18.
- A total solar eclipse on November 2.
Metonic
- Preceded by: Lunar eclipse of July 6, 1963
- Followed by: Lunar eclipse of February 10, 1971
Tzolkinex
- Preceded by: Lunar eclipse of March 13, 1960
- Followed by: Lunar eclipse of June 4, 1974
Half-Saros
- Preceded by: Solar eclipse of April 19, 1958
- Followed by: Solar eclipse of April 29, 1976
Tritos
- Preceded by: Lunar eclipse of May 24, 1956
- Followed by: Lunar eclipse of March 24, 1978
Lunar Saros 121
- Preceded by: Lunar eclipse of April 13, 1949
- Followed by: Lunar eclipse of May 4, 1985
Inex
- Preceded by: Lunar eclipse of May 14, 1938
- Followed by: Lunar eclipse of April 4, 1996
Triad
- Preceded by: Lunar eclipse of June 22, 1880
- Followed by: Lunar eclipse of February 22, 2054
Lunar eclipses of 1966–1969
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 August 27, 1969 occurs in the next lunar year eclipse set.
Metonic series
The Metonic cycle repeats nearly exactly every 19 years and represents a Saros cycle plus one lunar year. Because it occurs on the same calendar date, the Earth's shadow will in nearly the same location relative to the background stars.
| Descending node | Ascending node | |||||
|---|---|---|---|---|---|---|
| Saros | Date | Type | Saros | Date | Type | |
| 111 | 1948 Apr 23 | Partial | 116 | 1948 Oct 18 | Penumbral | |
| File:Lunar eclipse chart close-1948Apr23.png | File:Lunar eclipse chart close-1948Oct18.png | |||||
| 121 | 1967 Apr 24 | Total | 126 | 1967 Oct 18 | Total | |
| File:Lunar eclipse chart close-1967Apr24.png | File:Lunar eclipse chart close-1967Oct18.png | |||||
| 131 | 1986 Apr 24 | Total | 136 | 1986 Oct 17 | Total | |
| File:Lunar eclipse chart close-1986Apr24.png | File:Lunar eclipse chart close-1986Oct17.png | |||||
| 141 | 2005 Apr 24 | Penumbral | 146 | 2005 Oct 17 | Partial | |
| File:Lunar eclipse chart close-05apr24.png | File:Lunar eclipse chart close-2005Oct17.png | |||||
Saros 121
Template:Lunar Saros series 121
Tritos series
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.
Inex series
Template:Lunar Inex series March 2025
Half-Saros cycle
A lunar eclipse will be preceded and followed by solar eclipses by 9 years and 5.5 days (a half saros).[7] This lunar eclipse is related to two annular solar eclipses of Solar Saros 128.
| April 19, 1958 | April 29, 1976 |
|---|---|
| File:SE1958Apr19A.png | File:SE1976Apr29A.png |
See also
Notes
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- ↑ Script error: No such module "citation/CS1".
- ↑ Script error: No such module "citation/CS1".
- ↑ A Solar Eclipse from the Moon APOD 2014 April 7
- ↑ Script error: No such module "citation/CS1".
- ↑ Script error: No such module "citation/CS1".
- ↑ Script error: No such module "citation/CS1".
- ↑ Mathematical Astronomy Morsels, Jean Meeus, p.110, Chapter 18, The half-saros
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External links
- 1967 Apr 24 chart Eclipse Predictions by Fred Espenak, NASA/GSFC
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