Solar eclipse of August 11, 1961
Template:Short description Script error: No such module "Solar eclipse". An annular solar eclipse occurred at the Moon's ascending node of orbit on Friday, August 11, 1961,[1] with a magnitude of 0.9375. A solar eclipse occurs when the Moon passes between Earth and the Sun, thereby totally or partly obscuring the image of the Sun for a viewer on Earth. An annular solar eclipse occurs when the Moon's apparent diameter is smaller than the Sun's, blocking most of the Sun's light and causing the Sun to look like an annulus (ring). An annular eclipse appears as a partial eclipse over a region of the Earth thousands of kilometres wide. Occurring about 7 hours after apogee (on August 11, 1961, at 17:50 UTC), the Moon's apparent diameter was smaller.[2]
Annularity was visible from a part of Antarctica. A partial eclipse was visible for parts of eastern South America, Southern Africa, and Antarctica.
Eclipse details
Shown below are two tables displaying details about this particular solar eclipse. The first table outlines times at which the moon's penumbra or umbra attains the specific parameter, and the second table describes various other parameters pertaining to this eclipse.[3]
| Event | Time (UTC) |
|---|---|
| First Penumbral External Contact | 1961 August 11 at 08:13:26.2 UTC |
| First Umbral External Contact | 1961 August 11 at 09:47:06.3 UTC |
| First Central Line | 1961 August 11 at 09:52:11.0 UTC |
| First Umbral Internal Contact | 1961 August 11 at 09:57:40.3 UTC |
| Ecliptic Conjunction | 1961 August 11 at 10:36:17.9 UTC |
| Greatest Duration | 1961 August 11 at 10:45:02.0 UTC |
| Greatest Eclipse | 1961 August 11 at 10:46:46.9 UTC |
| Equatorial Conjunction | 1961 August 11 at 11:09:44.1 UTC |
| Last Umbral Internal Contact | 1961 August 11 at 11:35:36.6 UTC |
| Last Central Line | 1961 August 11 at 11:41:06.3 UTC |
| Last Umbral External Contact | 1961 August 11 at 11:46:11.6 UTC |
| Last Penumbral External Contact | 1961 August 11 at 13:19:57.6 UTC |
| Parameter | Value |
|---|---|
| Eclipse Magnitude | 0.93753 |
| Eclipse Obscuration | 0.87897 |
| Gamma | −0.88594 |
| Sun Right Ascension | 09h23m48.0s |
| Sun Declination | +15°16'44.3" |
| Sun Semi-Diameter | 15'46.9" |
| Sun Equatorial Horizontal Parallax | 08.7" |
| Moon Right Ascension | 09h23m06.0s |
| Moon Declination | +14°30'09.9" |
| Moon Semi-Diameter | 14'41.9" |
| Moon Equatorial Horizontal Parallax | 0°53'56.8" |
| ΔT | 33.8 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.
| August 11 Ascending node (new moon) |
August 26 Descending node (full moon) |
|---|---|
| File:SE1961Aug11A.png | File:Lunar eclipse chart close-1961Aug26.png |
| Annular solar eclipse Solar Saros 125 |
Partial lunar eclipse Lunar Saros 137 |
Related eclipses
Eclipses in 1961
- A total solar eclipse on February 15.
- A partial lunar eclipse on March 2.
- An annular solar eclipse on August 11.
- A partial lunar eclipse on August 26.
Metonic
- Preceded by: Solar eclipse of October 23, 1957
- Followed by: Solar eclipse of May 30, 1965
Tzolkinex
- Preceded by: Solar eclipse of June 30, 1954
- Followed by: Solar eclipse of September 22, 1968
Half-Saros
- Preceded by: Lunar eclipse of August 5, 1952
- Followed by: Lunar eclipse of August 17, 1970
Tritos
- Preceded by: Solar eclipse of September 12, 1950
- Followed by: Solar eclipse of July 10, 1972
Solar Saros 125
- Preceded by: Solar eclipse of August 1, 1943
- Followed by: Solar eclipse of August 22, 1979
Inex
- Preceded by: Solar eclipse of August 31, 1932
- Followed by: Solar eclipse of July 22, 1990
Triad
- Preceded by: Solar eclipse of October 10, 1874
- Followed by: Solar eclipse of June 11, 2048
Solar eclipses of 1961–1964
This eclipse is a member of a semester series. An eclipse in a semester series of solar eclipses repeats approximately every 177 days and 4 hours (a semester) at alternating nodes of the Moon's orbit.[4]
The partial solar eclipses on June 10, 1964 and December 4, 1964 occur in the next lunar year eclipse set.
| Solar eclipse series sets from 1961 to 1964 | ||||||
|---|---|---|---|---|---|---|
| Descending node | Ascending node | |||||
| Saros | Map | Gamma | Saros | Map | Gamma | |
| 120 File:1961 Total Solar Eclipse.jpg |
February 15, 1961 File:SE1961Feb15T.png Total |
0.883 | 125 | August 11, 1961 File:SE1961Aug11A.png Annular |
−0.8859 | |
| 130 | February 5, 1962 File:SE1962Feb05T.png Total |
0.2107 | 135 | July 31, 1962 File:SE1962Jul31A.png Annular |
−0.113 | |
| 140 | January 25, 1963 File:SE1963Jan25A.png Annular |
−0.4898 | 145 | July 20, 1963 File:SE1963Jul20T.png Total |
0.6571 | |
| 150 | January 14, 1964 File:SE1964Jan14P.png Partial |
−1.2354 | 155 | July 9, 1964 File:SE1964Jul09P.png Partial |
1.3623 | |
Saros 125
Template:Solar Saros series 125
Metonic series
The metonic series repeats eclipses every 19 years (6939.69 days), lasting about 5 cycles. Eclipses occur in nearly the same calendar date. In addition, the octon subseries repeats 1/5 of that or every 3.8 years (1387.94 days). All eclipses in this table occur at the Moon's ascending node.
Tritos series
Template:Solar Tritos series 2005 April 8
Inex series
Template:Solar Inex series 2019 July 2
Notes
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References
- Earth visibility chart and eclipse statistics Eclipse Predictions by Fred Espenak, NASA/GSFC
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