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Penumbral lunar eclipse July 17, 1962 From Wikipedia, the free encyclopedia
A penumbral lunar eclipse occurred at the Moon’s descending node of orbit on Tuesday, July 17, 1962,[1] with an umbral magnitude of −0.5835. 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 days before perigee (on July 20, 1962, at 11:00 UTC), the Moon's apparent diameter was larger.[2]
| Penumbral eclipse | |||||||||
The Moon's hourly motion shown right to left | |||||||||
| Date | July 17, 1962 | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| Gamma | 1.3371 | ||||||||
| Magnitude | −0.5835 | ||||||||
| Saros cycle | 109 (70 of 73) | ||||||||
| Penumbral | 168 minutes, 16 seconds | ||||||||
| |||||||||
The eclipse was completely visible over Australia, Antarctica, and the Pacific Ocean, seen rising over east and southeast Asia and setting over much of North America and western South America.[3]
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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 | 0.39245 |
| Umbral Magnitude | −0.58347 |
| Gamma | 1.33712 |
| Sun Right Ascension | 07h45m18.8s |
| Sun Declination | +21°14'17.1" |
| Sun Semi-Diameter | 15'44.2" |
| Sun Equatorial Horizontal Parallax | 08.7" |
| Moon Right Ascension | 19h44m51.2s |
| Moon Declination | -19°55'25.0" |
| Moon Semi-Diameter | 16'07.5" |
| Moon Equatorial Horizontal Parallax | 0°59'10.9" |
| ΔT | 34.3 s |
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 17 Descending node (full moon) | July 31 Ascending node (new moon) | August 15 Descending node (full moon) |
|---|---|---|
|  |  |
| Penumbral lunar eclipse Lunar Saros 109 | Annular solar eclipse Solar Saros 135 | Penumbral lunar eclipse Lunar Saros 147 |
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.
| Lunar eclipse series sets from 1962 to 1965 | ||||||||
|---|---|---|---|---|---|---|---|---|
| Descending node | Ascending node | |||||||
| Saros | Date Viewing |
Type Chart |
Gamma | Saros | Date Viewing |
Type Chart |
Gamma | |
| 109 | 1962 Jul 17 |
Penumbral |
1.3371 | 114 | 1963 Jan 09 |
Penumbral |
−1.0128 | |
| 119 | 1963 Jul 06 |
Partial |
0.6197 | 124 | 1963 Dec 30 |
Total |
−0.2889 | |
| 129 | 1964 Jun 25 |
Total |
−0.1461 | 134 | 1964 Dec 19 |
Total |
0.3801 | |
| 139 | 1965 Jun 14 |
Partial |
−0.9006 | 144 | 1965 Dec 08 |
Penumbral |
1.0775 | |
This eclipse is a part of Saros series 109, repeating every 18 years, 11 days, and containing 71 or 72 events (depending on the source). The series started with a penumbral lunar eclipse on June 27, 736 AD. It contains partial eclipses from September 22, 880 AD through April 16, 1223; total eclipses from April 27, 1241 through October 17, 1529; and a second set of partial eclipses from October 28, 1547 through May 22, 1872. The series ends at member 71 as a penumbral eclipse on August 8, 1998, though some sources count a possible penumbral eclipse on August 18, 2016 as the last eclipse of the series.
The longest duration of totality was produced by member 35 at 99 minutes, 45 seconds on July 1, 1349. All eclipses in this series occur at the Moon’s descending node of orbit.[6]
| Greatest | First | |||
|---|---|---|---|---|
| The greatest eclipse of the series occurred on 1349 Jul 01, lasting 99 minutes, 45 seconds.[7] | Penumbral | Partial | Total | Central |
| 736 Jun 27 |
880 Sep 22 |
1241 Apr 27 |
1295 May 30 | |
| Last | ||||
| Central | Total | Partial | Penumbral | |
| 1421 Aug 13 |
1529 Oct 17 |
1872 May 22 |
1998 Aug 08 | |
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.
| Series members 61–72 occur between 1801 and 2016: | |||||
|---|---|---|---|---|---|
| 61 | 62 | 63 | |||
| 1818 Apr 21 | 1836 May 01 | 1854 May 12 | |||
| 64 | 65 | 66 | |||
| 1872 May 22 | 1890 Jun 03 | 1908 Jun 14 | |||
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| 67 | 68 | 69 | |||
| 1926 Jun 25 | 1944 Jul 06 | 1962 Jul 17 | |||
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| 70 | 71 | 72 | |||
| 1980 Jul 27 | 1998 Aug 08 | 2016 Aug 18 | |||
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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.
| Series members between 1886 and 2200 | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| 1886 Feb 18 (Saros 102) |
1897 Jan 18 (Saros 103) |
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| 1951 Aug 17 (Saros 108) |
1962 Jul 17 (Saros 109) |
1973 Jun 15 (Saros 110) |
1984 May 15 (Saros 111) | ||||||
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| 1995 Apr 15 (Saros 112) |
2006 Mar 14 (Saros 113) |
2017 Feb 11 (Saros 114) |
2028 Jan 12 (Saros 115) |
2038 Dec 11 (Saros 116) | |||||
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| 2049 Nov 09 (Saros 117) |
2060 Oct 09 (Saros 118) |
2071 Sep 09 (Saros 119) |
2082 Aug 08 (Saros 120) |
2093 Jul 08 (Saros 121) | |||||
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| 2104 Jun 08 (Saros 122) |
2115 May 08 (Saros 123) |
2126 Apr 07 (Saros 124) |
2137 Mar 07 (Saros 125) |
2148 Feb 04 (Saros 126) | |||||
| 2159 Jan 04 (Saros 127) |
2169 Dec 04 (Saros 128) |
2180 Nov 02 (Saros 129) |
2191 Oct 02 (Saros 130) | ||||||
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 partial solar eclipses of Solar Saros 116.
| July 11, 1953 | July 22, 1971 |
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