September 1941 lunar eclipse
| Partial eclipse | |||||||||||||
| File:Lunar eclipse chart close-1941Sep05.png The Moon's hourly motion shown right to left | |||||||||||||
| Date | September 5, 1941 | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Gamma | 0.9747 | ||||||||||||
| Magnitude | 0.0511 | ||||||||||||
| Saros cycle | 117 (48 of 72) | ||||||||||||
| Partiality | 53 minutes, 21 seconds | ||||||||||||
| Penumbral | 279 minutes, 17 seconds | ||||||||||||
| |||||||||||||
A partial lunar eclipse occurred at the Moon’s descending node of orbit on Friday, September 5, 1941,[1] with an umbral magnitude of 0.0511. A lunar eclipse occurs when the Moon moves into the Earth's shadow, causing the Moon to be darkened. A partial lunar eclipse occurs when one part of the Moon is in the Earth's umbra, while the other part is in 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 5.9 days before apogee (on September 11, 1941, at 14:15 UTC), the Moon's apparent diameter was smaller.[2]
Visibility
[edit | edit source]The eclipse was completely visible over much of Asia, Australia, and Antarctica, seen rising over Africa and Europe and setting over northeast Asia and the central Pacific Ocean.[3]
| File:Lunar eclipse from moon-1941Sep05.png File:Lunar eclipse chart close-1941Sep05.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 | 1.08839 |
| Umbral Magnitude | 0.05110 |
| Gamma | 0.97469 |
| Sun Right Ascension | 10h56m24.2s |
| Sun Declination | +06°46'29.9" |
| Sun Semi-Diameter | 15'52.1" |
| Sun Equatorial Horizontal Parallax | 08.7" |
| Moon Right Ascension | 22h55m20.3s |
| Moon Declination | -05°54'07.9" |
| Moon Semi-Diameter | 15'17.9" |
| Moon Equatorial Horizontal Parallax | 0°56'08.6" |
| ΔT | 25.2 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.
| September 5 Descending node (full moon) |
September 21 Ascending node (new moon) |
|---|---|
| File:Lunar eclipse chart close-1941Sep05.png | File:SE1941Sep21T.png |
| Partial lunar eclipse Lunar Saros 117 |
Total solar eclipse Solar Saros 143 |
Related eclipses
[edit | edit source]Eclipses in 1941
[edit | edit source]- A partial lunar eclipse on March 13.
- An annular solar eclipse on March 27.
- A partial lunar eclipse on September 5.
- A total solar eclipse on September 21.
Metonic
[edit | edit source]- Preceded by: Lunar eclipse of November 18, 1937
- Followed by: Lunar eclipse of June 25, 1945
Tzolkinex
[edit | edit source]- Preceded by: Lunar eclipse of July 26, 1934
- Followed by: Lunar eclipse of October 18, 1948
Half-Saros
[edit | edit source]- Preceded by: Solar eclipse of August 31, 1932
- Followed by: Solar eclipse of September 12, 1950
Tritos
[edit | edit source]- Preceded by: Lunar eclipse of October 7, 1930
- Followed by: Lunar eclipse of August 5, 1952
Lunar Saros 117
[edit | edit source]- Preceded by: Lunar eclipse of August 26, 1923
- Followed by: Lunar eclipse of September 17, 1959
Inex
[edit | edit source]- Preceded by: Lunar eclipse of September 26, 1912
- Followed by: Lunar eclipse of August 17, 1970
Triad
[edit | edit source]- Preceded by: Lunar eclipse of November 4, 1854
- Followed by: Lunar eclipse of July 6, 2028
Lunar eclipses of 1940–1944
[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 April 22, 1940 and October 16, 1940 occur in the previous lunar year eclipse set, and the penumbral lunar eclipses on July 6, 1944 and December 29, 1944 occur in the next lunar year eclipse set.
Saros 117
[edit | edit source]This eclipse is a part of Saros series 117, repeating every 18 years, 11 days, and containing 71 events. The series started with a penumbral lunar eclipse on April 3, 1094. It contains partial eclipses from June 29, 1238 through September 23, 1382; total eclipses from October 3, 1400 through June 21, 1815; and a second set of partial eclipses from July 2, 1833 through September 5, 1941. The series ends at member 71 as a penumbral eclipse on May 15, 2356.
The longest duration of totality was produced by member 35 at 105 minutes, 43 seconds on April 17, 1707. 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 1707 Apr 17, lasting 105 minutes, 43 seconds.[7] | Penumbral | Partial | Total | Central |
| 1094 Apr 03 |
1238 Jun 29 |
1400 Oct 03 |
1563 Jan 09 | |
| Last | ||||
| Central | Total | Partial | Penumbral | |
| 1761 May 18 |
1815 Jun 21 |
1941 Sep 05 File:Lunar eclipse chart close-1941Sep05.png |
2356 May 15 | |
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 | |||||
|---|---|---|---|---|---|
| 1825 Nov 25 (Saros 113) |
1854 Nov 04 (Saros 114) |
1883 Oct 16 (Saros 115) | |||
| 1912 Sep 26 (Saros 116) |
1941 Sep 05 (Saros 117) |
1970 Aug 17 (Saros 118) | |||
| File:Lunar eclipse chart close-1912Sep26.png | File:Lunar eclipse from moon-1912Sep26.png | File:Lunar eclipse chart close-1941Sep05.png | File:Lunar eclipse from moon-1941Sep05.png | File:Lunar eclipse chart close-1970Aug17.png | File:Lunar eclipse from moon-1970Aug17.png |
| 1999 Jul 28 (Saros 119) |
2028 Jul 06 (Saros 120) |
2057 Jun 17 (Saros 121) | |||
| File:Lunar eclipse chart close-1999Jul28.png | File:Lunar eclipse from moon-1999Jul28.png | File:Lunar eclipse chart close-2028Jul06.png | File:Lunar eclipse from moon-2028Jul06.png | File:Lunar eclipse chart close-2057Jun17.png | File:Lunar eclipse from moon-2057Jun17.png |
| 2086 May 28 (Saros 122) |
2115 May 08 (Saros 123) |
2144 Apr 18 (Saros 124) | |||
| 2173 Mar 29 (Saros 125) | |||||
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 124.
| August 31, 1932 | September 12, 1950 |
|---|---|
| File:SE1932Aug31T.png | File:SE1950Sep12T.png |
See also
[edit | edit source]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).
- ^ 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 117
- ^ Mathematical Astronomy Morsels, Jean Meeus, p.110, Chapter 18, The half-saros
External links
[edit | edit source]- Saros series 117
- 1941 Sep 05 chart Eclipse Predictions by Fred Espenak, NASA/GSFC
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