Solar eclipse of July 22, 1971
| Partial eclipse | |
| Gamma | 1.513 |
|---|---|
| Magnitude | 0.0689 |
| Maximum eclipse | |
| Coordinates | Lua error: callParserFunction: function "#coordinates" was not found. |
| Times (UTC) | |
| Greatest eclipse | 9:31:55 |
| References | |
| Saros | 116 (70 of 70) |
| Catalog # (SE5000) | 9446 |
A partial solar eclipse occurred at the Moon's descending node of orbit on Thursday, July 22, 1971,[1] with a magnitude of 0.0689. 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. A partial solar eclipse occurs in the polar regions of the Earth when the center of the Moon's shadow misses the Earth.
A partial eclipse was visible for parts of the eastern Soviet Union and northern Alaska. This was the 70th and final solar eclipse from Solar Saros 116.
Eclipse details
[edit | edit source]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.[2]
| Event | Time (UTC) |
|---|---|
| Equatorial Conjunction | 1971 July 22 at 08:38:38.2 UTC |
| First Penumbral External Contact | 1971 July 22 at 08:52:56.7 UTC |
| Ecliptic Conjunction | 1971 July 22 at 09:15:39.4 UTC |
| Greatest Eclipse | 1971 July 22 at 09:31:55.3 UTC |
| Last Penumbral External Contact | 1971 July 22 at 10:11:20.6 UTC |
| Parameter | Value |
|---|---|
| Eclipse Magnitude | 0.06899 |
| Eclipse Obscuration | 0.02136 |
| Gamma | 1.51298 |
| Sun Right Ascension | 08h04m17.6s |
| Sun Declination | +20°22'36.4" |
| Sun Semi-Diameter | 15'44.4" |
| Sun Equatorial Horizontal Parallax | 08.7" |
| Moon Right Ascension | 08h06m05.8s |
| Moon Declination | +21°43'24.7" |
| Moon Semi-Diameter | 15'17.0" |
| Moon Equatorial Horizontal Parallax | 0°56'05.5" |
| ΔT | 41.8 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.
| July 22 Descending node (new moon) |
August 6 Ascending node (full moon) |
August 20 Descending node (new moon) |
|---|---|---|
| File:SE1971Jul22P.png | File:Lunar eclipse chart close-1971Aug06.png | File:SE1971Aug20P.png |
| Partial solar eclipse Solar Saros 116 |
Total lunar eclipse Lunar Saros 128 |
Partial solar eclipse Solar Saros 154 |
Related eclipses
[edit | edit source]Eclipses in 1971
[edit | edit source]- A total lunar eclipse on February 10.
- A partial solar eclipse on February 25.
- A partial solar eclipse on July 22.
- A total lunar eclipse on August 6.
- A partial solar eclipse on August 20.
Metonic
[edit | edit source]- Followed by: Solar eclipse of May 11, 1975
Tzolkinex
[edit | edit source]- Preceded by: Solar eclipse of June 10, 1964
Half-Saros
[edit | edit source]- Preceded by: Lunar eclipse of July 17, 1962
- Followed by: Lunar eclipse of July 27, 1980
Tritos
[edit | edit source]- Followed by: Solar eclipse of June 21, 1982
Solar Saros 116
[edit | edit source]- Preceded by: Solar eclipse of July 11, 1953
Inex
[edit | edit source]- Preceded by: Solar eclipse of August 12, 1942
- Followed by: Solar eclipse of July 1, 2000
Triad
[edit | edit source]- Followed by: Solar eclipse of May 22, 2058
Solar eclipses of 1971–1974
[edit | edit source]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.[3]
The partial solar eclipses on February 25, 1971 and August 20, 1971 occur in the previous lunar year eclipse set.
| Solar eclipse series sets from 1971 to 1974 | ||||||
|---|---|---|---|---|---|---|
| Descending node | Ascending node | |||||
| Saros | Map | Gamma | Saros | Map | Gamma | |
| 116 | July 22, 1971 File:SE1971Jul22P.png Partial |
1.513 | 121 | January 16, 1972 File:SE1972Jan16A.png Annular |
−0.9365 | |
| 126 | July 10, 1972 File:SE1972Jul10T.png Total |
0.6872 | 131 | January 4, 1973 File:SE1973Jan04A.png Annular |
−0.2644 | |
| 136 | June 30, 1973 File:SE1973Jun30T.png Total |
−0.0785 | 141 | December 24, 1973 File:SE1973Dec24A.png Annular |
0.4171 | |
| 146 | June 20, 1974 File:SE1974Jun20T.png Total |
−0.8239 | 151 | December 13, 1974 File:SE1974Dec13P.png Partial |
1.0797 | |
Saros 116
[edit | edit source]This eclipse is a part of Saros series 116, repeating every 18 years, 11 days, and containing 70 events. The series started with a partial solar eclipse on June 23, 727 AD. It contains annular eclipses from October 10, 907 AD through May 6, 1845. There are no hybrid or total eclipses in this set. The series ends at member 70 as a partial eclipse on July 22, 1971. Its 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.
The longest duration of annularity was produced by member 51 at 12 minutes, 2 seconds on December 25, 1628. All eclipses in this series occur at the Moon’s descending node of orbit.[4]
| Series members 61–70 occur between 1801 and 1971: | ||
|---|---|---|
| 61 | 62 | 63 |
| File:SE1809Apr14A.png April 14, 1809 |
File:SE1827Apr26A.gif April 26, 1827 |
File:SE1845May06An.gif May 6, 1845 |
| 64 | 65 | 66 |
| File:SE1863May17P.gif May 17, 1863 |
File:SE1881May27P.gif May 27, 1881 |
File:SE1899Jun08P.gif June 8, 1899 |
| 67 | 68 | 69 |
| File:SE1917Jun19P.png June 19, 1917 |
File:SE1935Jun30P.png June 30, 1935 |
File:SE1953Jul11P.png July 11, 1953 |
| 70 | ||
| File:SE1971Jul22P.png July 22, 1971 | ||
Metonic series
[edit | edit source]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 descending node.
| 21 eclipse events between July 22, 1971 and July 22, 2047 | ||||
|---|---|---|---|---|
| July 22 | May 9–11 | February 26–27 | December 14–15 | October 2–3 |
| 116 | 118 | 120 | 122 | 124 |
| File:SE1971Jul22P.png July 22, 1971 |
File:SE1975May11P.png May 11, 1975 |
File:SE1979Feb26T.png February 26, 1979 |
File:SE1982Dec15P.png December 15, 1982 |
File:SE1986Oct03H.png October 3, 1986 |
| 126 | 128 | 130 | 132 | 134 |
| File:SE1990Jul22T.png July 22, 1990 |
File:SE1994May10A.png May 10, 1994 |
File:SE1998Feb26T.png February 26, 1998 |
File:SE2001Dec14A.png December 14, 2001 |
File:SE2005Oct03A.png October 3, 2005 |
| 136 | 138 | 140 | 142 | 144 |
| File:SE2009Jul22T.png July 22, 2009 |
File:SE2013May10A.png May 10, 2013 |
File:SE2017Feb26A.png February 26, 2017 |
File:SE2020Dec14T.png December 14, 2020 |
File:SE2024Oct02A.png October 2, 2024 |
| 146 | 148 | 150 | 152 | 154 |
| File:SE2028Jul22T.png July 22, 2028 |
File:SE2032May09A.png May 9, 2032 |
File:SE2036Feb27P.png February 27, 2036 |
File:SE2039Dec15T.png December 15, 2039 |
File:SE2043Oct03A.png October 3, 2043 |
| 156 | ||||
| File:SE2047Jul22P.png July 22, 2047 | ||||
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.
The partial solar eclipses on March 27, 1884 (part of Saros 108) and December 24, 1916 (part of Saros 111) are also a part of this series but are not included in the table below.
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 | ||
|---|---|---|
| File:SE1826Oct31P.gif October 31, 1826 (Saros 111) |
||
| File:SE1913Aug31P.png August 31, 1913 (Saros 114) |
File:SE1942Aug12P.png August 12, 1942 (Saros 115) |
File:SE1971Jul22P.png July 22, 1971 (Saros 116) |
| File:SE2000Jul01P.png July 1, 2000 (Saros 117) |
File:SE2029Jun12P.png June 12, 2029 (Saros 118) |
File:SE2058May22P.png May 22, 2058 (Saros 119) |
| File:SE2087May02P.png May 2, 2087 (Saros 120) |
File:Saros121 66van71 SE2116Apr13P.jpg April 13, 2116 (Saros 121) |
File:Saros122 65van70 SE2145Mar23P.jpg March 23, 2145 (Saros 122) |
| File:Saros123 62van70 SE2174Mar03P.jpg March 3, 2174 (Saros 123) |
||
References
[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).
External links
[edit | edit source]- Earth visibility chart and eclipse statistics Eclipse Predictions by Fred Espenak, NASA/GSFC
.jpg){kind=link}
