A total lunar eclipse will occur at the Moon’s ascending node of orbit on Wednesday, June 9, 2123, with an umbral magnitude of 1.7488. It will be a central lunar eclipse, in which part of the Moon will pass through the center of the Earth's shadow. A lunar eclipse occurs when the Moon moves into the Earth'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 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. 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's shadow is smaller. Occurring about 1.4 days after apogee (on June 7, 2123, at 19:20 UTC), the Moon's apparent diameter will be smaller.

This dramatic total eclipse, lasting 106 minutes and 6 seconds, will plunge the full Moon into deep darkness as it passes right through the center 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 since July 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. This will also be the longest of the 22nd century and the second longest of the 3rd millennium. 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).

Visibility The eclipse will be completely visible over eastern and central North America, South America, and Antarctica, seen rising over western North America, eastern Australia, and the central Pacific Ocean and setting over Europe, Africa, and the Middle East.

Eclipse details Shown below is a table displaying details about this particular solar eclipse. It describes various parameters pertaining to this eclipse.

+June 9, 2123 Lunar Eclipse Parameters 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

Eclipse season

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.

+ Eclipse season of May–June 2123 May 25Descending node (new moon) June 9Ascending node (full moon) June 23Descending node (new moon) Partial solar eclipseSolar Saros 120 Total lunar eclipseLunar Saros 132 Partial solar eclipseSolar Saros 158

Related eclipses Eclipses in 2123 A partial solar eclipse on May 25. A total lunar eclipse on June 9. A partial solar eclipse on June 23. A partial solar eclipse on November 18. A total lunar eclipse on December 3.

Metonic Preceded by: Lunar eclipse of August 20, 2119 Followed by: Lunar eclipse of March 28, 2127

Tzolkinex Preceded by: Lunar eclipse of April 27, 2116 Followed by: Lunar eclipse of July 21, 2130

Half-Saros Preceded by: Solar eclipse of June 3, 2114 Followed by: Solar eclipse of June 13, 2132

Tritos Preceded by: Lunar eclipse of July 9, 2112 Followed by: Lunar eclipse of May 8, 2134

Lunar Saros 132 Preceded by: Lunar eclipse of May 28, 2105 Followed by: Lunar eclipse of June 19, 2141

Inex Preceded by: Lunar eclipse of June 28, 2094 Followed by: Lunar eclipse of May 18, 2152

Triad Preceded by: Lunar eclipse of August 7, 2036 Followed by: Lunar eclipse of April 10, 2210

Lunar eclipses of 2121–2125 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.

The penumbral lunar eclipses on February 2, 2121 and July 30, 2121 occur in the previous lunar year eclipse set, and the penumbral lunar eclipses on April 18, 2125 and October 12, 2125 occur in the next lunar year eclipse set.

Lunar eclipse series sets from 2121 to 2125 Ascending node  Descending node Saros DateViewing TypeChart Gamma Saros DateViewing TypeChart Gamma 112 2121 Jun 30Penumbral −1.4272 117 2121 Dec 24Penumbral 1.2261 122 2122 Jun 20Partial −0.7177 127 2122 Dec 13Partial 0.4979 1322123 Jun 09Total 0.0406 1372123 Dec 03Total −0.1755 142 2124 May 28Partial 0.7913 147 2124 Nov 21Partial −0.8808 152 2125 May 17Penumbral 1.4923

Saros 132

Tritos series

Inex series

Half-Saros cycle A lunar eclipse will be preceded and followed by solar eclipses by 9 years and 5.5 days (a half saros).Mathematical Astronomy Morsels, Jean Meeus, p.110, Chapter 18, The half-saros This lunar eclipse is related to two total solar eclipses of Solar Saros 139.

June 3, 2114June 13, 2132

References