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May 2023 lunar eclipse

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May 2023 lunar eclipse
Penumbral eclipse
From Surabaya, Indonesia at 17:22 UTC
DateMay 5, 2023
Gamma−1.0349
Magnitude−0.0438
Saros cycle141 (24 of 73)
Penumbral257 minutes, 31 seconds
Contacts (UTC)
P115:14:10
Greatest17:22:51
P419:31:41

A penumbral lunar eclipse occurred at the Moon’s descending node of orbit on Friday, May 5, 2023,[1] with an umbral magnitude of −0.0438. 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 5.2 days before perigee (on May 11, 2023, at 1:05 UTC), the Moon's apparent diameter was larger.[2]

This was the deepest penumbral eclipse (with –0.0438 magnitude) since February 2017 and until September 2042.[3]

Visibility

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The eclipse was completely visible over Asia, Australia, and Antarctica, seen rising over Africa and Europe and setting over the central Pacific Ocean.[4]


Visibility map
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Eclipse details

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

May 5, 2023 Lunar Eclipse Parameters
Parameter Value
Penumbral Magnitude 0.96551
Umbral Magnitude −0.04378
Gamma −1.03495
Sun Right Ascension 02h49m59.7s
Sun Declination +16°19'27.9"
Sun Semi-Diameter 15'51.6"
Sun Equatorial Horizontal Parallax 08.7"
Moon Right Ascension 14h48m23.5s
Moon Declination -17°14'31.7"
Moon Semi-Diameter 15'42.8"
Moon Equatorial Horizontal Parallax 0°57'40.1"
ΔT 70.9 s

Eclipse season

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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–May 2023
April 20
Ascending node (new moon)
 May 5
Descending node (full moon)
Hybrid solar eclipse
Solar Saros 129		 Penumbral lunar eclipse
Lunar Saros 141
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Eclipses in 2023

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Metonic

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Tzolkinex

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Half-Saros

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Tritos

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Lunar Saros 141

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Inex

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Triad

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Lunar eclipses of 2020–2023

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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 eclipses on January 10, 2020 and July 5, 2020 occur in the previous lunar year eclipse set.

Lunar eclipse series sets from 2020 to 2023
Descending node   Ascending node
Saros Date
Viewing 		Type
Chart 		Gamma Saros Date
Viewing 		Type
Chart 		Gamma
111
 2020 Jun 05
 Penumbral
 1.2406 116
 2020 Nov 30
 Penumbral
 −1.1309
121
 2021 May 26
 Total
 0.4774 126
 2021 Nov 19
 Partial
 −0.4553
131
 2022 May 16
 Total
 −0.2532 136
 2022 Nov 08
 Total
 0.2570
141
 2023 May 05
 Penumbral
 −1.0350 146
 2023 Oct 28
 Partial
 0.9472

Metonic series

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The metonic cycle repeats nearly exactly every 19 years and represents a Saros cycle plus one lunar year. Because it occurs on the same calendar date, the Earth's shadow will in nearly the same location relative to the background stars.

Metonic events: May 4 and October 28
Descending node Ascending node
  1. 1966 May 4 - Penumbral (111)
  2. 1985 May 4 - Total (121)
  3. 2004 May 4 - Total (131)
  4. 2023 May 5 - Penumbral (141)
  1. 1966 Oct 29 - Penumbral (116)
  2. 1985 Oct 28 - Total (126)
  3. 2004 Oct 28 - Total (136)
  4. 2023 Oct 28 - Partial (146)
  5. 2042 Oct 28 - Penumbral (156)

Saros 141

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This eclipse is a part of Saros series 141, repeating every 18 years, 11 days, and containing 72 events. The series started with a penumbral lunar eclipse on August 25, 1608. It contains partial eclipses from May 16, 2041 through July 20, 2149; total eclipses from August 1, 2167 through May 1, 2618; and a second set of partial eclipses from May 12, 2636 through July 16, 2744. The series ends at member 72 as a penumbral eclipse on October 11, 2888.

The longest duration of totality will be produced by member 39 at 104 minutes, 36 seconds on October 16, 2293. All eclipses in this series occur at the Moon’s descending node of orbit.[7]

Greatest First
The greatest eclipse of the series will occur on 2293 Oct 16, lasting 104 minutes, 36 seconds.[8] Penumbral Partial Total Central
1608 Aug 25
 2041 May 16
 2167 Aug 01
 2221 Sep 02
Last
Central Total Partial Penumbral
2546 Mar 18
 2618 May 01
 2744 Jul 16
 2888 Oct 11

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

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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 1801 and 2187
1805 Jan 15
(Saros 121) 		1815 Dec 16
(Saros 122) 		1826 Nov 14
(Saros 123) 		1837 Oct 13
(Saros 124) 		1848 Sep 13
(Saros 125)
1859 Aug 13
(Saros 126) 		1870 Jul 12
(Saros 127) 		1881 Jun 12
(Saros 128) 		1892 May 11
(Saros 129) 		1903 Apr 12
(Saros 130)
1914 Mar 12
(Saros 131) 		1925 Feb 08
(Saros 132) 		1936 Jan 08
(Saros 133) 		1946 Dec 08
(Saros 134) 		1957 Nov 07
(Saros 135)
1968 Oct 06
(Saros 136) 		1979 Sep 06
(Saros 137) 		1990 Aug 06
(Saros 138) 		2001 Jul 05
(Saros 139) 		2012 Jun 04
(Saros 140)
2023 May 05
(Saros 141) 		2034 Apr 03
(Saros 142) 		2045 Mar 03
(Saros 143) 		2056 Feb 01
(Saros 144) 		2066 Dec 31
(Saros 145)
2077 Nov 29
(Saros 146) 		2088 Oct 30
(Saros 147) 		2099 Sep 29
(Saros 148) 		2110 Aug 29
(Saros 149) 		2121 Jul 30
(Saros 150)
2132 Jun 28
(Saros 151) 		2143 May 28
(Saros 152) 		2154 Apr 28
(Saros 153)
2187 Jan 24
(Saros 156)

Half-Saros cycle

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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 148.

April 29, 2014 May 9, 2032

See also

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References

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  1. ^ "May 5–6, 2023 Penumbral Lunar Eclipse". timeanddate. Retrieved 18 November 2024.
  2. ^ "Moon Distances for London, United Kingdom, England". timeanddate. Retrieved 18 November 2024.
  3. ^ "Penumbral Lunar Eclipse on May 5–6, 2023 – Where and when to See".
  4. ^ "Penumbral Lunar Eclipse of 2023 May 05" (PDF). NASA. Retrieved 18 November 2024.
  5. ^ "Penumbral Lunar Eclipse of 2023 May 05". EclipseWise.com. Retrieved 18 November 2024.
  6. ^ van Gent, R.H. "Solar- and Lunar-Eclipse Predictions from Antiquity to the Present". A Catalogue of Eclipse Cycles. Utrecht University. Retrieved 6 October 2018.
  7. ^ "NASA - Catalog of Lunar Eclipses of Saros 141". eclipse.gsfc.nasa.gov.
  8. ^ Listing of Eclipses of series 141
  9. ^ Mathematical Astronomy Morsels, Jean Meeus, p.110, Chapter 18, The half-saros
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