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May 2170 lunar eclipse

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May 2170 lunar eclipse
Total eclipse
DateMay 30, 2170
Gamma0.0174
Magnitude1.8330
Saros cycle133 (35 of 71)
Totality101 minutes, 41 seconds
Partiality219 minutes, 22 seconds
Penumbral335 minutes, 22 seconds
Contacts (UTC)
P122:04:00
U123:01:56
U20:00:47
Greatest0:51:38
U31:42:28
U42:41:18
P43:39:22
← December 2169
November 2170 →

A total lunar eclipse will occur at the Moon’s descending node of orbit on Wednesday, May 30, 2170,[1] 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 3.6 days after perigee (on May 26, 2170, at 10:15 UTC), the Moon's apparent diameter will be larger.[2]

This will be the greatest lunar eclipse of Lunar Saros 133 as well as the largest and darkest lunar eclipse of the 22nd century.[3]

Visibility

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The eclipse will be completely visible over central and eastern South America, western Europe, and much of Africa, seen rising over western South America and much of North America and setting over eastern Europe, the western half of Asia, and western Australia.

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.[4]

May 30, 2170 Lunar Eclipse Parameters
Parameter Value
Penumbral Magnitude 2.81880
Umbral Magnitude 1.83301
Gamma 0.01743
Sun Right Ascension 04h28m29.8s
Sun Declination +21°45'15.5"
Sun Semi-Diameter 15'47.2"
Sun Equatorial Horizontal Parallax 08.7"
Moon Right Ascension 16h28m30.9s
Moon Declination -21°44'16.0"
Moon Semi-Diameter 16'00.8"
Moon Equatorial Horizontal Parallax 0°58'46.3"
ΔT 219.6 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. The first and last eclipse in this sequence is separated by one synodic month.

Eclipse season of May–June 2170
May 16
Ascending node (new moon)
 May 30
Descending node (full moon)
 June 14
Ascending node (new moon)
Partial solar eclipse
Solar Saros 121		 Total lunar eclipse
Lunar Saros 133		 Partial solar eclipse
Solar Saros 159
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Eclipses in 2170

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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 133

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Inex

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Triad

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Lunar eclipses of 2168–2172

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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.[5]

The lunar eclipses on January 24, 2168 (partial), July 20, 2168 (penumbral), and January 13, 2169 (penumbral) occur in the previous lunar year eclipse set, and the penumbral lunar eclipses on April 9, 2172 and October 2, 2172 occur in the next lunar year eclipse set.

Lunar eclipse series sets from 2168 to 2172
Ascending node   Descending node
Saros Date
Viewing 		Type
Chart 		Gamma Saros Date
Viewing 		Type
Chart 		Gamma
118 2168 Dec 14
 Penumbral
 −1.1945 123 2169 Jun 09
 Partial
 0.8158
128 2169 Dec 04
 Partial
 −0.5488 133 2170 May 30
 Total
 0.0174
138 2170 Nov 23
 Total
 0.1554 143 2171 May 19
 Partial
 −0.7166
148 2171 Nov 12
 Partial
 0.8584 153 2172 May 08
 Penumbral
 −1.4275
158 2172 Oct 31
 Penumbral
 1.5197

Saros 133

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This eclipse is a part of Saros series 133, repeating every 18 years, 11 days, and containing 71 events. The series started with a penumbral lunar eclipse on May 13, 1557. It contains partial eclipses from August 7, 1683 through December 17, 1899; total eclipses from December 28, 1917 through August 3, 2278; and a second set of partial eclipses from August 14, 2296 through March 11, 2639. The series ends at member 71 as a penumbral eclipse on June 29, 2819.

The longest duration of totality will be produced by member 35 at 101 minutes, 41 seconds on May 30, 2170. All eclipses in this series occur at the Moon’s descending node of orbit.[6]

Greatest First
The greatest eclipse of the series will occur on 2170 May 30, lasting 101 minutes, 41 seconds.[7] Penumbral Partial Total Central
1557 May 13
 1683 Aug 07
 1917 Dec 28
 2098 Apr 15
Last
Central Total Partial Penumbral
2224 Jul 01
 2278 Aug 03
 2639 Mar 11
 2819 Jun 29

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 2200
1810 Mar 21
(Saros 100) 		1821 Feb 17
(Saros 101) 		1832 Jan 17
(Saros 102) 		1842 Dec 17
(Saros 103)
1864 Oct 15
(Saros 105) 		1875 Sep 15
(Saros 106) 		1886 Aug 14
(Saros 107) 		1897 Jul 14
(Saros 108) 		1908 Jun 14
(Saros 109)
1919 May 15
(Saros 110) 		1930 Apr 13
(Saros 111) 		1941 Mar 13
(Saros 112) 		1952 Feb 11
(Saros 113) 		1963 Jan 09
(Saros 114)
1973 Dec 10
(Saros 115) 		1984 Nov 08
(Saros 116) 		1995 Oct 08
(Saros 117) 		2006 Sep 07
(Saros 118) 		2017 Aug 07
(Saros 119)
2028 Jul 06
(Saros 120) 		2039 Jun 06
(Saros 121) 		2050 May 06
(Saros 122) 		2061 Apr 04
(Saros 123) 		2072 Mar 04
(Saros 124)
2083 Feb 02
(Saros 125) 		2094 Jan 01
(Saros 126) 		2104 Dec 02
(Saros 127) 		2115 Nov 02
(Saros 128) 		2126 Oct 01
(Saros 129)
2137 Aug 30
(Saros 130) 		2148 Jul 31
(Saros 131) 		2159 Jun 30
(Saros 132) 		2170 May 30
(Saros 133) 		2181 Apr 29
(Saros 134)
2192 Mar 28
(Saros 135)

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).[8] This lunar eclipse is related to two annular solar eclipses of Solar Saros 140.

May 25, 2161 June 5, 2179

References

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  1. ^ "May 29–30, 2170 Total Lunar Eclipse (Blood Moon)". timeanddate. Retrieved 15 December 2024.
  2. ^ "Moon Distances for London, United Kingdom, England". timeanddate. Retrieved 15 December 2024.
  3. ^ "NASA - Catalog of Lunar Eclipses in Saros 133". eclipse.gsfc.nasa.gov. Retrieved 2021-01-24.
  4. ^ "Total Lunar Eclipse of 2170 May 30". EclipseWise.com. Retrieved 15 December 2024.
  5. ^ 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.
  6. ^ "NASA - Catalog of Lunar Eclipses of Saros 133". eclipse.gsfc.nasa.gov.
  7. ^ Listing of Eclipses of series 133
  8. ^ Mathematical Astronomy Morsels, Jean Meeus, p.110, Chapter 18, The half-saros


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