June 1964 lunar eclipse
| Total eclipse | |||||||||||||||||
| File:Lunar eclipse chart close-1964Jun25.png The Moon's hourly motion shown right to left | |||||||||||||||||
| Date | June 25, 1964 | ||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Gamma | −0.1461 | ||||||||||||||||
| Magnitude | 1.5565 | ||||||||||||||||
| Saros cycle | 129 (35 of 71) | ||||||||||||||||
| Totality | 100 minutes, 47 seconds | ||||||||||||||||
| Partiality | 233 minutes, 14 seconds | ||||||||||||||||
| Penumbral | 372 minutes, 5 seconds | ||||||||||||||||
| |||||||||||||||||
A total lunar eclipse occurred at the Moon’s descending node of orbit on Thursday, June 25, 1964,[1] with an umbral magnitude of 1.5565. It was a central lunar eclipse, in which part of the Moon passed through the center of the Earth's shadow. 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 about 1.5 days after apogee (on June 23, 1964, at 12:30 UTC), the Moon's apparent diameter was smaller.[2]
Visibility
[edit | edit source]The eclipse was completely visible over much of South America, western Europe, and west, central, and southern Africa, seen rising over much of North America and northwestern South America and setting over much of Europe, northeast Africa, the western half of Asia, and western Australia.[3]
| File:Lunar eclipse from moon-1964Jun25.png File:Lunar eclipse chart close-1964Jun25.png |
Eclipse details
[edit | edit source]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 | 2.62384 |
| Umbral Magnitude | 1.55649 |
| Gamma | −0.14611 |
| Sun Right Ascension | 06h15m16.1s |
| Sun Declination | +23°23'50.0" |
| Sun Semi-Diameter | 15'44.1" |
| Sun Equatorial Horizontal Parallax | 08.7" |
| Moon Right Ascension | 18h15m13.5s |
| Moon Declination | -23°31'42.9" |
| Moon Semi-Diameter | 14'44.5" |
| Moon Equatorial Horizontal Parallax | 0°54'06.1" |
| ΔT | 35.4 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. The first and last eclipse in this sequence is separated by one synodic month.
| June 10 Ascending node (new moon) |
June 25 Descending node (full moon) |
July 9 Ascending node (new moon) |
|---|---|---|
| File:SE1964Jun10P.png | File:Lunar eclipse chart close-1964Jun25.png | File:SE1964Jul09P.png |
| Partial solar eclipse Solar Saros 117 |
Total lunar eclipse Lunar Saros 129 |
Partial solar eclipse Solar Saros 155 |
Related eclipses
[edit | edit source]Eclipses in 1964
[edit | edit source]- A partial solar eclipse on January 14.
- A partial solar eclipse on June 10.
- A total lunar eclipse on June 25.
- A partial solar eclipse on July 9.
- A partial solar eclipse on December 4.
- A total lunar eclipse on December 19.
Metonic
[edit | edit source]- Preceded by: Lunar eclipse of September 5, 1960
- Followed by: Lunar eclipse of April 13, 1968
Tzolkinex
[edit | edit source]- Preceded by: Lunar eclipse of May 13, 1957
- Followed by: Lunar eclipse of August 6, 1971
Half-Saros
[edit | edit source]- Preceded by: Solar eclipse of June 20, 1955
- Followed by: Solar eclipse of June 30, 1973
Tritos
[edit | edit source]- Preceded by: Lunar eclipse of July 26, 1953
- Followed by: Lunar eclipse of May 25, 1975
Lunar Saros 129
[edit | edit source]- Preceded by: Lunar eclipse of June 14, 1946
- Followed by: Lunar eclipse of July 6, 1982
Inex
[edit | edit source]- Preceded by: Lunar eclipse of July 16, 1935
- Followed by: Lunar eclipse of June 4, 1993
Triad
[edit | edit source]- Preceded by: Lunar eclipse of August 23, 1877
- Followed by: Lunar eclipse of April 26, 2051
Lunar eclipses of 1962–1965
[edit | edit source]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.[5]
The penumbral lunar eclipses on February 19, 1962 and August 15, 1962 occur in the previous lunar year eclipse set.
Saros 129
[edit | edit source]This eclipse is a part of Saros series 129, repeating every 18 years, 11 days, and containing 71 events. The series started with a penumbral lunar eclipse on June 10, 1351. It contains partial eclipses from September 26, 1531 through May 11, 1892; total eclipses from May 24, 1910 through September 8, 2090; and a second set of partial eclipses from September 20, 2108 through April 26, 2469. The series ends at member 71 as a penumbral eclipse on July 24, 2613.
The longest duration of totality was produced by member 37 at 106 minutes, 24 seconds on July 16, 2000. All eclipses in this series occur at the Moon’s descending node of orbit.[6]
| Greatest | First | |||
|---|---|---|---|---|
| File:Lunar eclipse chart close-2000jul16.png The greatest eclipse of the series occurred on 2000 Jul 16, lasting 106 minutes, 24 seconds.[7] |
Penumbral | Partial | Total | Central |
| 1351 Jun 10 |
1531 Sep 26 |
1910 May 24 File:Lunar eclipse chart close-1910May24.png |
1946 Jun 14 File:Lunar eclipse chart close-1946Jun14.png | |
| Last | ||||
| Central | Total | Partial | Penumbral | |
| 2036 Aug 07 File:Lunar eclipse chart close-2036Aug07.png |
2090 Sep 08 File:Lunar eclipse chart close-2090Sep08.png |
2469 Apr 26 |
2613 Jul 24 | |
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
[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.
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 | |||||
|---|---|---|---|---|---|
| 1819 Oct 03 (Saros 124) |
1848 Sep 13 (Saros 125) |
1877 Aug 23 (Saros 126) | |||
| 1906 Aug 04 (Saros 127) |
1935 Jul 16 (Saros 128) |
1964 Jun 25 (Saros 129) | |||
| File:Lunar eclipse chart close-1906Aug04.png | File:Lunar eclipse from moon-1906Aug04.png | File:Lunar eclipse chart close-1935Jul16.png | File:Lunar eclipse from moon-1935Jul16.png | File:Lunar eclipse chart close-1964Jun25.png | File:Lunar eclipse from moon-1964Jun25.png |
| 1993 Jun 04 (Saros 130) |
2022 May 16 (Saros 131) |
2051 Apr 26 (Saros 132) | |||
| File:Lunar eclipse chart close-1993Jun04.png | File:Lunar eclipse from moon-1993Jun04.png | File:Lunar eclipse chart close-2022may16.png | File:Lunar eclipse from moon-2022May16.png | File:Lunar eclipse chart close-2051Apr26.png | File:Lunar eclipse from moon-2051Apr26.png |
| 2080 Apr 04 (Saros 133) |
2109 Mar 17 (Saros 134) |
2138 Feb 24 (Saros 135) | |||
| File:Lunar eclipse chart close-2080Apr04.png | File:Lunar eclipse from moon-2080Apr04.png | ||||
| 2167 Feb 04 (Saros 136) |
2196 Jan 15 (Saros 137) | ||||
Half-Saros cycle
[edit | edit source]A lunar eclipse will be preceded and followed by solar eclipses by 9 years and 5.5 days (a half saros).[8] This lunar eclipse is related to two total solar eclipses of Solar Saros 136.
| June 20, 1955 | June 30, 1973 |
|---|---|
| File:SE1955Jun20T.png | File:SE1973Jun30T.png |
See also
[edit | edit source]Notes
[edit | edit source]- ^ Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
- ^ Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
- ^ Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
- ^ Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
- ^ Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
- ^ Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
- ^ Listing of Eclipses of series 129
- ^ Mathematical Astronomy Morsels, Jean Meeus, p.110, Chapter 18, The half-saros
External links
[edit | edit source]- 1964 Jun 25 chart Eclipse Predictions by Fred Espenak, NASA/GSFC
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