September 2042 lunar eclipse
| Penumbral eclipse | |||||||||
| File:Lunar eclipse chart close-2042Sep29.png The Moon's hourly motion shown right to left | |||||||||
| Date | September 29, 2042 | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| Gamma | −1.0261 | ||||||||
| Magnitude | −0.0011 | ||||||||
| Saros cycle | 118 (53 of 73) | ||||||||
| Penumbral | 238 minutes, 32 seconds | ||||||||
| |||||||||
A penumbral lunar eclipse will occur at the Moon’s ascending node of orbit on Monday, September 29, 2042,[1] with an umbral magnitude of −0.0011. 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 only about 9 hours before perigee (on September 29, 2042, at 19:45 UTC), the Moon's apparent diameter will be larger.[2]
Earlier sources compute this as a 0.3% partial eclipse lasting under 12 minutes,[3] but newer calculations list it as a penumbral eclipse that never enters the umbral shadow.
Visibility
[edit | edit source]The eclipse will be completely visible over eastern Australia, northeast Asia, and western North America, seen rising over east Asia and western Australia and setting over eastern North America and South America.[4]
| File:Lunar eclipse from moon-2042Sep29.png File:Lunar eclipse chart close-2042Sep29.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.[5]
| Parameter | Value |
|---|---|
| Penumbral Magnitude | 0.95481 |
| Umbral Magnitude | −0.00105 |
| Gamma | −1.02617 |
| Sun Right Ascension | 12h23m37.3s |
| Sun Declination | -02°33'13.4" |
| Sun Semi-Diameter | 15'57.9" |
| Sun Equatorial Horizontal Parallax | 08.8" |
| Moon Right Ascension | 00h25m38.7s |
| Moon Declination | +01°38'07.3" |
| Moon Semi-Diameter | 16'42.1" |
| Moon Equatorial Horizontal Parallax | 1°01'18.0" |
| ΔT | 80.7 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.
| September 29 Ascending node (full moon) |
October 14 Descending node (new moon) |
October 28 Ascending node (full moon) |
|---|---|---|
| File:Lunar eclipse chart close-2042Sep29.png | File:SE2042Oct14A.png | File:Lunar eclipse chart close-2042Oct28.png |
| Penumbral lunar eclipse Lunar Saros 118 |
Annular solar eclipse Solar Saros 144 |
Penumbral lunar eclipse Lunar Saros 156 |
Related eclipses
[edit | edit source]Eclipses in 2042
[edit | edit source]- A penumbral lunar eclipse on April 5.
- A total solar eclipse on April 20.
- A penumbral lunar eclipse on September 29.
- An annular solar eclipse on October 14.
- A penumbral lunar eclipse on October 28.
Metonic
[edit | edit source]- Preceded by: Lunar eclipse of December 11, 2038
- Followed by: Lunar eclipse of July 18, 2046
Tzolkinex
[edit | edit source]- Preceded by: Lunar eclipse of August 19, 2035
- Followed by: Lunar eclipse of November 9, 2049
Half-Saros
[edit | edit source]- Preceded by: Solar eclipse of September 23, 2033
- Followed by: Solar eclipse of October 4, 2051
Tritos
[edit | edit source]- Preceded by: Lunar eclipse of October 30, 2031
- Followed by: Lunar eclipse of August 29, 2053
Lunar Saros 118
[edit | edit source]- Preceded by: Lunar eclipse of September 18, 2024
- Followed by: Lunar eclipse of October 9, 2060
Inex
[edit | edit source]- Preceded by: Lunar eclipse of October 18, 2013
- Followed by: Lunar eclipse of September 9, 2071
Triad
[edit | edit source]- Preceded by: Lunar eclipse of November 29, 1955
- Followed by: Lunar eclipse of July 31, 2129
Lunar eclipses of 2042–2045
[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.[6]
The penumbral lunar eclipse on October 28, 2042 occurs in the previous lunar year eclipse set.
Saros 118
[edit | edit source]This eclipse is a part of Saros series 118, repeating every 18 years, 11 days, and containing 73 events. The series started with a penumbral lunar eclipse on March 2, 1105. It contains partial eclipses from June 8, 1267 through August 12, 1375; total eclipses from August 22, 1393 through June 22, 1880; and a second set of partial eclipses from July 3, 1898 through September 18, 2024. The series ends at member 73 as a penumbral eclipse on May 7, 2403.
The longest duration of totality was produced by member 37 at 99 minutes, 22 seconds on April 7, 1754. All eclipses in this series occur at the Moon’s ascending node of orbit.[7]
| Greatest | First | |||
|---|---|---|---|---|
| The greatest eclipse of the series occurred on 1754 Apr 07, lasting 99 minutes, 22 seconds.[8] | Penumbral | Partial | Total | Central |
| 1105 Mar 02 |
1267 Jun 08 |
1393 Aug 22 |
1465 Oct 04 | |
| Last | ||||
| Central | Total | Partial | Penumbral | |
| 1826 May 21 |
1880 Jun 22 |
2024 Sep 18 File:Lunar eclipse chart close-2024Sep18.png |
2403 May 07 | |
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 | |||||
|---|---|---|---|---|---|
| 1811 Mar 10 (Saros 110) |
1840 Feb 17 (Saros 111) |
1869 Jan 28 (Saros 112) | |||
| 1898 Jan 08 (Saros 113) |
1926 Dec 19 (Saros 114) |
1955 Nov 29 (Saros 115) | |||
| File:Lunar eclipse chart close-1926Dec19.png | File:Lunar eclipse from moon-1926Dec19.png | File:Lunar eclipse chart close-1955Nov29.png | File:Lunar eclipse from moon-1955Nov29.png | ||
| 1984 Nov 08 (Saros 116) |
2013 Oct 18 (Saros 117) |
2042 Sep 29 (Saros 118) | |||
| File:Lunar eclipse chart close-1984Nov08.png | File:Lunar eclipse from moon-1984Nov08.png | File:Lunar eclipse chart close-2013Oct18.png | File:Lunar eclipse from moon-2013Oct18.png | File:Lunar eclipse chart close-2042Sep29.png | File:Lunar eclipse from moon-2042Sep29.png |
| 2071 Sep 09 (Saros 119) |
2100 Aug 19 (Saros 120) |
2129 Jul 31 (Saros 121) | |||
| 2158 Jul 11 (Saros 122) |
2187 Jun 20 (Saros 123) | ||||
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).[9] This lunar eclipse is related to two annular solar eclipses of Solar Saros 125.
| September 23, 2033 | October 4, 2051 |
|---|---|
| File:SE2033Sep23P.png | File:SE2051Oct04P.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).
- ^ Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
- ^ Listing of Eclipses of series 118
- ^ Mathematical Astronomy Morsels, Jean Meeus, p.110, Chapter 18, The half-saros
External links
[edit | edit source]- 2042 Sep 29 chart: Eclipse Predictions by Fred Espenak, NASA/GSFC
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