April 2042 lunar eclipse

A penumbral lunar eclipse will occur at the Moon’s descending node of orbit on Saturday, April 5, 2042,^[1] with an umbral magnitude of −0.2156. 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 about 1.6 days after apogee (on April 4, 2042, at 1:50 UTC), the Moon's apparent diameter will be smaller.^[2]

April 2042 lunar eclipse

Penumbral eclipse
The Moon's hourly motion shown right to left
Date	April 5, 2042
Gamma	1.1080
Magnitude	−0.2156
Saros cycle	113 (65 of 71)
Penumbral	268 minutes, 27 seconds
Contacts (UTC) P1 12:14:31 Greatest 14:28:45 P4 16:42:58
← November 2041 September 2042 →

It will occur on Easter Sunday (Gregorian only), the only such case for an eclipse between April 2015 and April 2164.^[3]: 152

Visibility

The eclipse will be completely visible over east Asia and Australia, seen rising over east Africa and west and central Asia and setting over western North America.^[4]

Eclipse details

Shown below is a table displaying details about this particular eclipse. It describes various parameters pertaining to this eclipse.^[5]

April 5, 2042 Lunar Eclipse Parameters

Parameter	Value
Penumbral Magnitude	0.87002
Umbral Magnitude	−0.21557
Gamma	1.10805
Sun Right Ascension	00h58m43.2s
Sun Declination	+06°16'08.8"
Sun Semi-Diameter	15'59.3"
Sun Equatorial Horizontal Parallax	08.8"
Moon Right Ascension	13h00m37.2s
Moon Declination	-05°23'23.8"
Moon Semi-Diameter	14'43.6"
Moon Equatorial Horizontal Parallax	0°54'03.0"
ΔT	80.4 s

Eclipse season

See also: Eclipse cycle

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.

Eclipse season of April 2042

April 5 Descending node (full moon)	April 20 Ascending node (new moon)
Penumbral lunar eclipse Lunar Saros 113	Total solar eclipse Solar Saros 139

Related eclipses

Eclipses in 2042

• 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

• Preceded by: Lunar eclipse of June 17, 2038
• Followed by: Lunar eclipse of January 22, 2046

Tzolkinex

• Preceded by: Lunar eclipse of February 22, 2035
• Followed by: Lunar eclipse of May 17, 2049

Half-Saros

• Preceded by: Solar eclipse of March 30, 2033
• Followed by: Solar eclipse of April 11, 2051

Tritos

• Preceded by: Lunar eclipse of May 7, 2031
• Followed by: Lunar eclipse of March 4, 2053

Lunar Saros 113

• Preceded by: Lunar eclipse of March 25, 2024
• Followed by: Lunar eclipse of April 15, 2060

Inex

• Preceded by: Lunar eclipse of April 25, 2013
• Followed by: Lunar eclipse of March 16, 2071

Triad

• Preceded by: Lunar eclipse of June 5, 1955
• Followed by: Lunar eclipse of February 4, 2129

Lunar eclipses of 2042–2045

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.

Lunar eclipse series sets from 2042 to 2045
Descending node					Ascending node
Saros	Date Viewing	Type Chart	Gamma		Saros	Date Viewing	Type Chart	Gamma
113	2042 Apr 05	Penumbral	1.1080		118	2042 Sep 29	Penumbral	−1.0261
123	2043 Mar 25	Total	0.3849		128	2043 Sep 19	Total	−0.3316
133	2044 Mar 13	Total	−0.3496		138	2044 Sep 07	Total	0.4318
143	2045 Mar 03	Penumbral	−1.0274		148	2045 Aug 27	Penumbral	1.2060

Saros 113

This eclipse is a part of Saros series 113, repeating every 18 years, 11 days, and containing 71 events. The series started with a penumbral lunar eclipse on April 29, 888 AD. It contains partial eclipses from July 14, 1014 through March 10, 1411; total eclipses from March 20, 1429 through August 7, 1645; and a second set of partial eclipses from August 18, 1663 through February 21, 1970. The series ends at member 71 as a penumbral eclipse on June 10, 2150.

The longest duration of totality was produced by member 38 at 103 minutes, 6 seconds on June 5, 1555. All eclipses in this series occur at the Moon’s descending node of orbit.^[7]

Greatest	First
The greatest eclipse of the series occurred on 1555 Jun 05, lasting 103 minutes, 6 seconds.[8]	Penumbral	Partial	Total	Central
	888 Apr 29	1014 Jul 14	1429 Mar 20	1483 Apr 22
	Last
	Central	Total	Partial	Penumbral
	1609 Jul 16	1645 Aug 07	1970 Feb 21	2150 Jun 10

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.

Series members 52–71 occur between 1801 and 2150:
52		53		54
1807 Nov 15		1825 Nov 25		1843 Dec 07
55		56		57
1861 Dec 17		1879 Dec 28		1898 Jan 08
58		59		60
1916 Jan 20		1934 Jan 30		1952 Feb 11
61		62		63
1970 Feb 21		1988 Mar 03		2006 Mar 14
64		65		66
2024 Mar 25		2042 Apr 05		2060 Apr 15
67		68		69
2078 Apr 27		2096 May 07		2114 May 19
70		71
2132 May 30		2150 Jun 10

Tritos series

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.

Series members between 1922 and 2200
1922 Mar 13 (Saros 102)		1933 Feb 10 (Saros 103)
				1998 Aug 08 (Saros 109)		2009 Jul 07 (Saros 110)		2020 Jun 05 (Saros 111)
2031 May 07 (Saros 112)		2042 Apr 05 (Saros 113)		2053 Mar 04 (Saros 114)		2064 Feb 02 (Saros 115)		2075 Jan 02 (Saros 116)
2085 Dec 01 (Saros 117)		2096 Oct 31 (Saros 118)		2107 Oct 02 (Saros 119)		2118 Aug 31 (Saros 120)		2129 Jul 31 (Saros 121)
2140 Jun 30 (Saros 122)		2151 May 30 (Saros 123)		2162 Apr 29 (Saros 124)		2173 Mar 29 (Saros 125)		2184 Feb 26 (Saros 126)
2195 Jan 26 (Saros 127)

Inex series

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
1810 Sep 13 (Saros 105)		1839 Aug 24 (Saros 106)		1868 Aug 03 (Saros 107)
1897 Jul 14 (Saros 108)		1926 Jun 25 (Saros 109)		1955 Jun 05 (Saros 110)
1984 May 15 (Saros 111)		2013 Apr 25 (Saros 112)		2042 Apr 05 (Saros 113)
2071 Mar 16 (Saros 114)		2100 Feb 24 (Saros 115)		2129 Feb 04 (Saros 116)
2158 Jan 14 (Saros 117)		2186 Dec 26 (Saros 118)

Half-Saros cycle

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 120.

March 30, 2033	April 11, 2051

See also

• List of lunar eclipses and List of 21st-century lunar eclipses