| Total eclipse | |||||||||||||||||
 The Moon's hourly motion shown right to left | |||||||||||||||||
| Date | January 22, 2084 | ||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Gamma | −0.3610 | ||||||||||||||||
| Magnitude | 1.1531 | ||||||||||||||||
| Saros cycle | 135 (27 of 71) | ||||||||||||||||
| Totality | 60 minutes, 32 seconds | ||||||||||||||||
| Partiality | 216 minutes, 16 seconds | ||||||||||||||||
| Penumbral | 362 minutes, 0 seconds | ||||||||||||||||
| |||||||||||||||||
July 2084 → | |||||||||||||||||
A totallunar eclipse will occur at the Moon’sdescending node of orbit on Saturday, January 22, 2084,[1] with an umbralmagnitude of 1.1531. 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 4 days afterapogee (on January 18, 2084, at 23:50 UTC), the Moon's apparent diameter will be smaller.[2]
This lunar eclipse will be the third of analmost tetrad, with the others being onFebruary 2, 2083 (total);July 29, 2083 (total); andJuly 17, 2084 (partial).
The eclipse will be completely visible overAfrica,Europe, andwest andcentral Asia, seen rising overNorth andSouth America and setting oversouth andeast Asia and westernAustralia.[3]
 |
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 | 2.24251 |
| Umbral Magnitude | 1.15312 |
| Gamma | −0.36098 |
| Sun Right Ascension | 20h20m36.4s |
| Sun Declination | -19°30'37.0" |
| Sun Semi-Diameter | 16'15.1" |
| Sun Equatorial Horizontal Parallax | 08.9" |
| Moon Right Ascension | 08h20m09.1s |
| Moon Declination | +19°11'55.7" |
| Moon Semi-Diameter | 14'55.1" |
| Moon Equatorial Horizontal Parallax | 0°54'45.0" |
| ΔT | 111.5 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.
| January 7 Ascending node (new moon) | January 22 Descending node (full moon) |
|---|---|
 | |
| Partial solar eclipse Solar Saros 123 | Total lunar eclipse Lunar Saros 135 |
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.[5]
The penumbral lunar eclipses onJune 8, 2085 andDecember 1, 2085 occur in the next lunar year eclipse set.
| Lunar eclipse series sets from 2082 to 2085 | ||||||||
|---|---|---|---|---|---|---|---|---|
| Descending node | Ascending node | |||||||
| Saros | Date Viewing | Type Chart | Gamma | Saros | Date Viewing | Type Chart | Gamma | |
| 115 | 2082 Feb 13 | Partial | 1.0101 | 120 | 2082 Aug 08 | Penumbral | −1.0203 | |
| 125 | 2083 Feb 02 | Total | 0.3463 | 130 | 2083 Jul 29 | Total | −0.2143 | |
| 135 | 2084 Jan 22 | Total | −0.3610 | 140 | 2084 Jul 17 | Partial | 0.5312 | |
| 145 | 2085 Jan 10 | Penumbral | −1.0453 | 150 | 2085 Jul 07 | Penumbral | 1.2694 | |
This eclipse is a part ofSaros series 135, repeating every 18 years, 11 days, and containing 71 events. The series started with a penumbral lunar eclipse on April 13, 1615. It contains partial eclipses from July 20, 1777 throughOctober 28, 1939; total eclipses fromNovember 7, 1957 through July 6, 2354; and a second set of partial eclipses from July 16, 2372 through September 19, 2480. The series ends at member 71 as a penumbral eclipse on May 18, 2877.
The longest duration of totality will be produced by member 37 at 106 minutes, 13 seconds on May 12, 2264. All eclipses in this series occur at the Moon’sdescending node of orbit.[6]
| Greatest | First | |||
|---|---|---|---|---|
| The greatest eclipse of the series will occur on2264 May 12, lasting 106 minutes, 13 seconds.[7] | Penumbral | Partial | Total | Central |
| 1615 Apr 13 | 1777 Jul 20 | 1957 Nov 07 | 2174 Mar 18 | |
| Last | ||||
| Central | Total | Partial | Penumbral | |
| 2318 Jun 14 | 2354 Jul 06 | 2480 Sep 19 | 2877 May 18 | |
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 12–33 occur between 1801 and 2200: | |||||
|---|---|---|---|---|---|
| 12 | 13 | 14 | |||
| 1813 Aug 12 | 1831 Aug 23 | 1849 Sep 02 | |||
| 15 | 16 | 17 | |||
| 1867 Sep 14 | 1885 Sep 24 | 1903 Oct 06 | |||
 |  | ||||
| 18 | 19 | 20 | |||
| 1921 Oct 16 | 1939 Oct 28 | 1957 Nov 07 | |||
 |  |  |  | |  |
| 21 | 22 | 23 | |||
| 1975 Nov 18 | 1993 Nov 29 | 2011 Dec 10 | |||
 |  |  |  |  |  |
| 24 | 25 | 26 | |||
| 2029 Dec 20 | 2048 Jan 01 | 2066 Jan 11 | |||
 |  |  |  |  |  |
| 27 | 28 | 29 | |||
| 2084 Jan 22 | 2102 Feb 03 | 2120 Feb 14 | |||
| | ||||
| 30 | 31 | 32 | |||
| 2138 Feb 24 | 2156 Mar 07 | 2174 Mar 18 | |||
| 33 | |||||
| 2192 Mar 28 | |||||
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 | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| 1811 Mar 10 (Saros 110) | 1822 Feb 06 (Saros 111) | 1833 Jan 06 (Saros 112) | 1843 Dec 07 (Saros 113) | 1854 Nov 04 (Saros 114) | |||||
| 1865 Oct 04 (Saros 115) | 1876 Sep 03 (Saros 116) | 1887 Aug 03 (Saros 117) | 1898 Jul 03 (Saros 118) | 1909 Jun 04 (Saros 119) | |||||
 |  | ||||||||
| 1920 May 03 (Saros 120) | 1931 Apr 02 (Saros 121) | 1942 Mar 03 (Saros 122) | 1953 Jan 29 (Saros 123) | 1963 Dec 30 (Saros 124) | |||||
 |  |  |  |  |  |  |  |  |  |
| 1974 Nov 29 (Saros 125) | 1985 Oct 28 (Saros 126) | 1996 Sep 27 (Saros 127) | 2007 Aug 28 (Saros 128) | 2018 Jul 27 (Saros 129) | |||||
 |  |  |  |  |  |  |  |  |  |
| 2029 Jun 26 (Saros 130) | 2040 May 26 (Saros 131) | 2051 Apr 26 (Saros 132) | 2062 Mar 25 (Saros 133) | 2073 Feb 22 (Saros 134) | |||||
 |  |  |  |  |  | ||||
| 2084 Jan 22 (Saros 135) | 2094 Dec 21 (Saros 136) | 2105 Nov 21 (Saros 137) | 2116 Oct 21 (Saros 138) | 2127 Sep 20 (Saros 139) | |||||
| |  |  | ||||||
| 2138 Aug 20 (Saros 140) | 2149 Jul 20 (Saros 141) | 2160 Jun 18 (Saros 142) | 2171 May 19 (Saros 143) | 2182 Apr 18 (Saros 144) | |||||
| 2193 Mar 17 (Saros 145) | |||||||||
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 | |||||
|---|---|---|---|---|---|
| 1823 Jul 23 (Saros 126) | 1852 Jul 01 (Saros 127) | 1881 Jun 12 (Saros 128) | |||
| 1910 May 24 (Saros 129) | 1939 May 03 (Saros 130) | 1968 Apr 13 (Saros 131) | |||
 |  |  |  |  |  |
| 1997 Mar 24 (Saros 132) | 2026 Mar 03 (Saros 133) | 2055 Feb 11 (Saros 134) | |||
 |  |  |  |  |  |
| 2084 Jan 22 (Saros 135) | 2113 Jan 02 (Saros 136) | 2141 Dec 13 (Saros 137) | |||
| | ||||
| 2170 Nov 23 (Saros 138) | 2199 Nov 02 (Saros 139) | ||||
A lunar eclipse will be preceded and followed by solar eclipses by 9 years and 5.5 days (ahalf saros).[8] This lunar eclipse is related to two total solar eclipses ofSolar Saros 142.
| January 16, 2075 | January 27, 2093 |
|---|---|
 |  |
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