| Total eclipse | |||||||||||||||||
 The Moon's hourly motion shown right to left | |||||||||||||||||
| Date | June 9, 2123 | ||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Gamma | 0.0406 | ||||||||||||||||
| Magnitude | 1.7488 | ||||||||||||||||
| Saros cycle | 132 (36 of 71) | ||||||||||||||||
| Totality | 106 minutes, 6 seconds | ||||||||||||||||
| Partiality | 235 minutes, 47 seconds | ||||||||||||||||
| Penumbral | 374 minutes, 23 seconds | ||||||||||||||||
| |||||||||||||||||
← December 2122 December 2123 → | |||||||||||||||||
A totallunar eclipse will occur at the Moon’sascending node of orbit on Wednesday, June 9, 2123,[1] with an umbralmagnitude of 1.7488. It will be acentral lunar eclipse, in which part of theMoon will pass through thecenter of theEarth's shadow. A lunar eclipse occurs when theMoon moves into theEarth's shadow, causing the Moon to be darkened. A total lunar eclipse occurs when the Moon's near side entirely passes into the Earth's umbral shadow. Unlike asolar eclipse, which can only be viewed from a relatively small area of the world, a lunar eclipse may be viewed from anywhere on thenight side of Earth. A total lunar eclipse can last up to nearly two hours, while a total solar eclipse lasts only a few minutes at any given place, because the Moon'sshadow is smaller. Occurring about 1.4 days afterapogee (on June 7, 2123, at 19:20 UTC), the Moon's apparent diameter will be smaller.[2]
This dramatic total eclipse, lasting 106 minutes and 6 seconds, will plunge the full Moon into deep darkness as it passes right through thecenter of the Earth's umbral shadow. While the visual effect of a total eclipse is variable, the Moon may be stained a deep orange or red colour at maximum eclipse. This will be a great spectacle for everyone who sees it. The partial eclipse will last for 3 hours and 56 minutes in total. The penumbral eclipse lasts for 6 hours and 14 minutes. This will be the longest total lunar eclipse sinceJuly 16, 2000 (106 minutes, 25 seconds), and the longest one until May 12, 2264 (106 minutes, 13 seconds) and July 27, 3107 (106 minutes, 21 seconds), though the eclipse on June 19, 2141 will be nearly identical in all aspects.[3] This will also be the longest of the22nd century and the second longest of the 3rd millennium.[4] The eclipse on June 19, 2141 will be the second longest of the 22nd century and the third longest of the third millennium (at 106 minutes 5 seconds).
The eclipse will be completely visible over eastern and centralNorth America,South America, andAntarctica, seen rising over western North America, easternAustralia, and the centralPacific Ocean and setting overEurope,Africa, and theMiddle East.
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 | 2.81895 |
| Umbral Magnitude | 1.74877 |
| Gamma | 0.04055 |
| Sun Right Ascension | 05h07m45.7s |
| Sun Declination | +22°52'47.0" |
| Sun Semi-Diameter | 15'45.7" |
| Sun Equatorial Horizontal Parallax | 08.7" |
| Moon Right Ascension | 17h07m45.6s |
| Moon Declination | -22°50'35.5" |
| Moon Semi-Diameter | 14'43.7" |
| Moon Equatorial Horizontal Parallax | 0°54'03.0" |
| ΔT | 153.5 s |
This eclipse is part of aneclipse 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 afortnight. The first and last eclipse in this sequence is separated by onesynodic month.
| May 25 Descending node (new moon) | June 9 Ascending node (full moon) | June 23 Descending node (new moon) |
|---|---|---|
 | |  |
| Partial solar eclipse Solar Saros 120 | Total lunar eclipse Lunar Saros 132 | Partial solar eclipse Solar Saros 158 |
This eclipse is a member of asemester series. An eclipse in a semester series of lunar eclipses repeats approximately every 177 days and 4 hours (a semester) at alternatingnodes of the Moon's orbit.[6]
The penumbral lunar eclipses onFebruary 2, 2121 andJuly 30, 2121 occur in the previous lunar year eclipse set, and the penumbral lunar eclipses onApril 18, 2125 andOctober 12, 2125 occur in the next lunar year eclipse set.
| Lunar eclipse series sets from 2121 to 2125 | ||||||||
|---|---|---|---|---|---|---|---|---|
| Ascending node | Descending node | |||||||
| Saros | Date Viewing | Type Chart | Gamma | Saros | Date Viewing | Type Chart | Gamma | |
| 112 | 2121 Jun 30 | Penumbral | −1.4272 | 117 | 2121 Dec 24 | Penumbral | 1.2261 | |
| 122 | 2122 Jun 20 | Partial | −0.7177 | 127 | 2122 Dec 13 | Partial | 0.4979 | |
| 132 | 2123 Jun 09 | Total | 0.0406 | 137 | 2123 Dec 03 | Total | −0.1755 | |
| 142 | 2124 May 28 | Partial | 0.7913 | 147 | 2124 Nov 21 | Partial | −0.8808 | |
| 152 | 2125 May 17 | Penumbral | 1.4923 | |||||
This eclipse is a part ofSaros series 132, repeating every 18 years, 11 days, and containing 71 events. The series started with a penumbral lunar eclipse on May 12, 1492. It contains partial eclipses from August 16, 1636 throughMarch 24, 1997; total eclipses fromApril 4, 2015 through August 2, 2213; and a second set of partial eclipses from August 13, 2231 through November 30, 2411. The series ends at member 71 as a penumbral eclipse on June 26, 2754.
The longest duration of totality will be produced by member 36 at 106 minutes, 6 seconds onJune 9, 2123. All eclipses in this series occur at the Moon’sascending node of orbit.[7]
| Greatest | First | |||
|---|---|---|---|---|
The greatest eclipse of the series will occur on2123 Jun 09, lasting 106 minutes, 6 seconds.[8] | Penumbral | Partial | Total | Central |
1492 May 12 | 1636 Aug 16 | 2015 Apr 04 | 2069 May 06 | |
| Last | ||||
| Central | Total | Partial | Penumbral | |
2177 Jul 11 | 2213 Aug 02 | 2411 Nov 30 | 2754 Jun 26 | |
Eclipses are tabulated in three columns; every third eclipse in the same column is oneexeligmos apart, so they all cast shadows over approximately the same parts of the Earth.
| Series members 19–40 occur between 1801 and 2200: | |||||
|---|---|---|---|---|---|
| 19 | 20 | 21 | |||
| 1816 Dec 04 | 1834 Dec 16 | 1852 Dec 26 | |||
| 22 | 23 | 24 | |||
| 1871 Jan 06 | 1889 Jan 17 | 1907 Jan 29 | |||
 |  | ||||
| 25 | 26 | 27 | |||
| 1925 Feb 08 | 1943 Feb 20 | 1961 Mar 02 | |||
 |  |  |  |  |  |
| 28 | 29 | 30 | |||
| 1979 Mar 13 | 1997 Mar 24 | 2015 Apr 04 | |||
 |  |  |  | |  |
| 31 | 32 | 33 | |||
| 2033 Apr 14 | 2051 Apr 26 | 2069 May 06 | |||
 |  |  |  | |  |
| 34 | 35 | 36 | |||
| 2087 May 17 | 2105 May 28 | 2123 Jun 09 | |||
 |  | | |||
| 37 | 38 | 39 | |||
| 2141 Jun 19 | 2159 Jun 30 | 2177 Jul 11 | |||
| 40 | |||||
| 2195 Jul 22 | |||||
This eclipse is a part of atritos cycle, repeating at alternating nodes every 135synodic months (≈ 3986.63 days, or 11 years minus 1 month). Their appearance and longitude are irregular due to a lack of synchronization with theanomalistic 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 1801 and 2200 | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| 1806 Nov 26 (Saros 103) | 1828 Sep 23 (Saros 105) | 1839 Aug 24 (Saros 106) | 1850 Jul 24 (Saros 107) | ||||||
| 1861 Jun 22 (Saros 108) | 1872 May 22 (Saros 109) | 1883 Apr 22 (Saros 110) | 1894 Mar 21 (Saros 111) | 1905 Feb 19 (Saros 112) | |||||
 |  | ||||||||
| 1916 Jan 20 (Saros 113) | 1926 Dec 19 (Saros 114) | 1937 Nov 18 (Saros 115) | 1948 Oct 18 (Saros 116) | 1959 Sep 17 (Saros 117) | |||||
 |  |  |  |  |  |  |  |  |  |
| 1970 Aug 17 (Saros 118) | 1981 Jul 17 (Saros 119) | 1992 Jun 15 (Saros 120) | 2003 May 16 (Saros 121) | 2014 Apr 15 (Saros 122) | |||||
 |  |  |  |  |  |  |  |  |  |
| 2025 Mar 14 (Saros 123) | 2036 Feb 11 (Saros 124) | 2047 Jan 12 (Saros 125) | 2057 Dec 11 (Saros 126) | 2068 Nov 09 (Saros 127) | |||||
 |  |  |  |  |  |  |  |  |  |
| 2079 Oct 10 (Saros 128) | 2090 Sep 08 (Saros 129) | 2101 Aug 09 (Saros 130) | 2112 Jul 09 (Saros 131) | 2123 Jun 09 (Saros 132) | |||||
 |  |  |  | | |||||
| 2134 May 08 (Saros 133) | 2145 Apr 07 (Saros 134) | 2156 Mar 07 (Saros 135) | 2167 Feb 04 (Saros 136) | 2178 Jan 04 (Saros 137) | |||||
| 2188 Dec 04 (Saros 138) | 2199 Nov 02 (Saros 139) | ||||||||
This eclipse is a part of the long periodinex cycle, repeating at alternating nodes, every 358synodic months (≈ 10,571.95 days, or 29 years minus 20 days). Their appearance and longitude are irregular due to a lack of synchronization with theanomalistic 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 | |||||
|---|---|---|---|---|---|
| 1805 Jan 15 (Saros 121) | 1833 Dec 26 (Saros 122) | 1862 Dec 06 (Saros 123) | |||
| 1891 Nov 16 (Saros 124) | 1920 Oct 27 (Saros 125) | 1949 Oct 07 (Saros 126) | |||
 |  |  |  | ||
| 1978 Sep 16 (Saros 127) | 2007 Aug 28 (Saros 128) | 2036 Aug 07 (Saros 129) | |||
 |  |  |  |  |  |
| 2065 Jul 17 (Saros 130) | 2094 Jun 28 (Saros 131) | 2123 Jun 09 (Saros 132) | |||
 |  |  |  | | |
| 2152 May 18 (Saros 133) | 2181 Apr 29 (Saros 134) | ||||
A lunar eclipse will be preceded and followed by solar eclipses by 9 years and 5.5 days (ahalf saros).[9] This lunar eclipse is related to two total solar eclipses ofSolar Saros 139.
| June 3, 2114 | June 13, 2132 |
|---|---|
 |  |
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