September 1969 lunar eclipse
Template:Short description Template:Infobox lunar eclipse A penumbral lunar eclipse occurred at the Moon’s ascending node of orbit on Thursday, September 25, 1969,[1] with an umbral magnitude of −0.0952. A lunar eclipse occurs when the Moon moves into the Earth's shadow, causing the Moon to be darkened. A penumbral lunar eclipse occurs when part or all of the Moon's near side passes into 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 3.4 days after perigee (on September 22, 1969, at 11:45 UTC), the Moon's apparent diameter was larger.[2]
Visibility
The eclipse was completely visible over Europe, Africa, and Asia, seen rising over eastern South America and west Africa and setting over northeast Asia and Australia.[3]
| File:Lunar eclipse from moon-1969Sep25.png File:Lunar eclipse chart close-1969Sep25.png |
Eclipse details
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 | 0.90080 |
| Umbral Magnitude | −0.09519 |
| Gamma | 1.06558 |
| Sun Right Ascension | 12h09m26.5s |
| Sun Declination | -01°01'23.8" |
| Sun Semi-Diameter | 15'57.2" |
| Sun Equatorial Horizontal Parallax | 08.8" |
| Moon Right Ascension | 00h07m25.1s |
| Moon Declination | +01°56'11.3" |
| Moon Semi-Diameter | 16'01.1" |
| Moon Equatorial Horizontal Parallax | 0°58'47.2" |
| ΔT | 39.9 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. The first and last eclipse in this sequence is separated by one synodic month.
| August 27 Ascending node (full moon) |
September 11 Descending node (new moon) |
September 25 Ascending node (full moon) |
|---|---|---|
| File:Lunar eclipse chart close-1969Aug27.png | File:SE1969Sep11A.png | File:Lunar eclipse chart close-1969Sep25.png |
| Penumbral lunar eclipse Lunar Saros 108 |
Annular solar eclipse Solar Saros 134 |
Penumbral lunar eclipse Lunar Saros 146 |
Related eclipses
Eclipses in 1969
- An annular solar eclipse on March 18.
- A penumbral lunar eclipse on April 2.
- A penumbral lunar eclipse on August 27.
- An annular solar eclipse on September 11.
- A penumbral lunar eclipse on September 25.
Metonic
- Preceded by: Lunar eclipse of December 8, 1965
- Followed by: Lunar eclipse of July 15, 1973
Tzolkinex
- Preceded by: Lunar eclipse of August 15, 1962
- Followed by: Lunar eclipse of November 6, 1976
Half-Saros
- Preceded by: Solar eclipse of September 20, 1960
- Followed by: Solar eclipse of October 2, 1978
Tritos
- Preceded by: Lunar eclipse of October 27, 1958
- Followed by: Lunar eclipse of August 26, 1980
Lunar Saros 146
- Preceded by: Lunar eclipse of September 15, 1951
- Followed by: Lunar eclipse of October 7, 1987
Inex
- Preceded by: Lunar eclipse of October 16, 1940
- Followed by: Lunar eclipse of September 6, 1998
Triad
- Preceded by: Lunar eclipse of November 25, 1882
- Followed by: Lunar eclipse of July 26, 2056
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.[5]
The penumbral lunar eclipse on August 27, 1969 occurs in the next lunar year eclipse set.
Saros 146
Template:Lunar Saros series 146
Tritos series
Template:Lunar Tritos series June 2002
Inex series
Template:Lunar Inex series August 2027
Half-Saros cycle
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 partial solar eclipses of Solar Saros 153.
| September 20, 1960 | October 2, 1978 |
|---|---|
| File:SE1960Sep20P.png | File:SE1978Oct02P.png |
See also
Notes
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- ↑ Script error: No such module "citation/CS1".
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- ↑ 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
- 1969 Sep 25 chart Eclipse Predictions by Fred Espenak, NASA/GSFC
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