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January 1935 lunar eclipse

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January 1935 lunar eclipse
Total eclipse
The Moon's hourly motion shown right to left
DateJanuary 19, 1935
Gamma0.2498
Magnitude1.3500
Saros cycle123 (48 of 73)
Totality86 minutes, 16 seconds
Partiality226 minutes, 39 seconds
Penumbral372 minutes, 8 seconds
Contacts (UTC)
P112:41:08
U113:53:51
U215:04:03
Greatest15:47:11
U316:30:19
U417:40:30
P418:53:16

A total lunar eclipse occurred at the Moon’s descending node of orbit on Saturday, January 19, 1935,[1] with an umbral magnitude of 1.3500. It was a central lunar eclipse, in which part of the Moon passed 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 2.3 days before apogee (on January 21, 1935, at 22:10 UTC), the Moon's apparent diameter was smaller.[2]

Visibility

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The eclipse was completely visible over much of Asia and Australia, seen rising over Africa, Europe, and the Middle East and setting over North America and the eastern Pacific Ocean.[3]

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]

January 19, 1935 Lunar Eclipse Parameters
Parameter Value
Penumbral Magnitude 2.45023
Umbral Magnitude 1.34995
Gamma 0.24979
Sun Right Ascension 20h03m07.8s
Sun Declination -20°26'15.8"
Sun Semi-Diameter 16'15.3"
Sun Equatorial Horizontal Parallax 08.9"
Moon Right Ascension 08h03m25.2s
Moon Declination +20°39'10.5"
Moon Semi-Diameter 14'46.4"
Moon Equatorial Horizontal Parallax 0°54'13.1"
ΔT 23.8 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 January–February 1935
January 5
Ascending node (new moon)		 January 19
Descending node (full moon)		 February 3
Ascending node (new moon)
Partial solar eclipse
Solar Saros 111		 Total lunar eclipse
Lunar Saros 123		 Partial solar eclipse
Solar Saros 149
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Eclipses in 1935

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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 123

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Inex

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Triad

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Lunar eclipses of 1933–1936

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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 penumbral lunar eclipses on March 12, 1933 and September 4, 1933 occur in the previous lunar year eclipse set.

Lunar eclipse series sets from 1933 to 1936
Descending node   Ascending node
Saros Date
Viewing 		Type
Chart 		Gamma Saros Date
Viewing 		Type
Chart 		Gamma
103 1933 Feb 10
 Penumbral
 1.5600 108 1933 Aug 05
 Penumbral
 −1.4216
113 1934 Jan 30
 Partial
 0.9258 118 1934 Jul 26
 Partial
 −0.6681
123 1935 Jan 19
 Total
 0.2498 128 1935 Jul 16
 Total
 0.0672
133 1936 Jan 08
 Total
 −0.4429 138 1936 Jul 04
 Partial
 0.8642
143 1936 Dec 28
 Penumbral
 −1.0971

Saros 123

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This eclipse is a part of Saros series 123, repeating every 18 years, 11 days, and containing 72 events. The series started with a penumbral lunar eclipse on August 16, 1087. It contains partial eclipses from May 2, 1520 through July 6, 1610; total eclipses from July 16, 1628 through April 4, 2061; and a second set of partial eclipses from April 16, 2079 through July 2, 2205. The series ends at member 72 as a penumbral eclipse on October 8, 2367.

The longest duration of totality was produced by member 37 at 105 minutes, 58 seconds on September 20, 1736. All eclipses in this series occur at the Moon’s descending node of orbit.[6]

Greatest First
The greatest eclipse of the series occurred on 1736 Sep 20, lasting 105 minutes, 58 seconds.[7] Penumbral Partial Total Central
1087 Aug 16
 1520 May 02
 1628 Jul 16
 1682 Aug 18
Last
Central Total Partial Penumbral
1953 Jan 29
 2061 Apr 04
 2205 Jul 02
 2367 Oct 08

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
1804 Jan 26
(Saros 111) 		1814 Dec 26
(Saros 112) 		1825 Nov 25
(Saros 113) 		1836 Oct 24
(Saros 114) 		1847 Sep 24
(Saros 115)
1858 Aug 24
(Saros 116) 		1869 Jul 23
(Saros 117) 		1880 Jun 22
(Saros 118) 		1891 May 23
(Saros 119) 		1902 Apr 22
(Saros 120)
1913 Mar 22
(Saros 121) 		1924 Feb 20
(Saros 122) 		1935 Jan 19
(Saros 123) 		1945 Dec 19
(Saros 124) 		1956 Nov 18
(Saros 125)
1967 Oct 18
(Saros 126) 		1978 Sep 16
(Saros 127) 		1989 Aug 17
(Saros 128) 		2000 Jul 16
(Saros 129) 		2011 Jun 15
(Saros 130)
2022 May 16
(Saros 131) 		2033 Apr 14
(Saros 132) 		2044 Mar 13
(Saros 133) 		2055 Feb 11
(Saros 134) 		2066 Jan 11
(Saros 135)
2076 Dec 10
(Saros 136) 		2087 Nov 10
(Saros 137) 		2098 Oct 10
(Saros 138) 		2109 Sep 09
(Saros 139) 		2120 Aug 09
(Saros 140)
2131 Jul 10
(Saros 141) 		2142 Jun 08
(Saros 142) 		2153 May 08
(Saros 143) 		2164 Apr 07
(Saros 144) 		2175 Mar 07
(Saros 145)
2186 Feb 04
(Saros 146) 		2197 Jan 04
(Saros 147)

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 total solar eclipses of Solar Saros 130.

January 14, 1926 January 25, 1944

See also

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Notes

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  1. ^ "January 19–20, 1935 Total Lunar Eclipse (Blood Moon)". timeanddate. Retrieved 17 December 2024.
  2. ^ "Moon Distances for London, United Kingdom, England". timeanddate. Retrieved 17 December 2024.
  3. ^ "Total Lunar Eclipse of 1935 Jan 19" (PDF). NASA. Retrieved 17 December 2024.
  4. ^ "Total Lunar Eclipse of 1935 Jan 19". EclipseWise.com. Retrieved 17 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 123". eclipse.gsfc.nasa.gov.
  7. ^ Listing of Eclipses of series 123
  8. ^ Mathematical Astronomy Morsels, Jean Meeus, p.110, Chapter 18, The half-saros
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