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January 1934 lunar eclipse

A partial lunar eclipse occurred at the Moon’s descending node of orbit on Tuesday, January 30, 1934,[1] with an umbral magnitude of 0.1120. A lunar eclipse occurs when the Moon moves into the Earth's shadow, causing the Moon to be darkened. A partial lunar eclipse occurs when one part of the Moon is in the Earth's umbra, while the other part is in 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 2.9 days after apogee (on January 27, 1934, at 18:55 UTC), the Moon's apparent diameter was smaller.[2]

January 1934 lunar eclipse
Partial eclipse
The Moon's hourly motion shown right to left
DateJanuary 30, 1934
Gamma0.9258
Magnitude0.1120
Saros cycle113 (59 of 71)
Partiality80 minutes, 55 seconds
Penumbral304 minutes, 16 seconds
Contacts (UTC)
P114:10:10
U116:01:54
Greatest16:42:18
U417:22:49
P419:14:26

Visibility

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The eclipse was completely visible over Asia and Australia, seen rising over Africa and Europe and setting over western North America and the central 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 30, 1934 Lunar Eclipse Parameters
Parameter Value
Penumbral Magnitude 1.20734
Umbral Magnitude 0.11204
Gamma 0.92581
Sun Right Ascension 20h50m17.7s
Sun Declination -17°42'54.6"
Sun Semi-Diameter 16'14.0"
Sun Equatorial Horizontal Parallax 08.9"
Moon Right Ascension 08h51m34.9s
Moon Declination 18°29'48.4"
Moon Semi-Diameter 14'49.3"
Moon Equatorial Horizontal Parallax 0°54'23.7"
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.

Eclipse season of January–February 1934
January 30
Descending node (full moon)		 February 14
Ascending node (new moon)
   
Partial lunar eclipse
Lunar Saros 113		 Total solar eclipse
Solar Saros 139
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Eclipses in 1934

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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 113

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Inex

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Triad

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Lunar eclipses of 1933–1936

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Lunar eclipse series sets from 1933–1936
Descending node   Ascending node
Saros Date
Viewing 		Type
Chart 		Saros Date
Viewing 		Type
Chart
103 1933 Feb 10
  		Penumbral
  		108 1933 Aug 05
  		Penumbral
 
113 1934 Jan 30
  		Partial
  		118 1934 Jul 26
  		Partial
 
123 1935 Jan 19
  		Total
  		128 1935 Jul 16
  		Total
 
133 1936 Jan 08
  		Total
  		138 1936 Jul 04
  		Partial
 
143 1936 Dec 28
  		Penumbral
 

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).[5] This lunar eclipse is related to two total solar eclipses of Solar Saros 120.

January 24, 1925 February 4, 1943
   

See also

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Notes

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  1. ^ "January 30–31, 1934 Partial Lunar Eclipse". timeanddate. Retrieved 17 December 2024.
  2. ^ "Moon Distances for London, United Kingdom, England". timeanddate. Retrieved 17 December 2024.
  3. ^ "Partial Lunar Eclipse of 1934 Jan 30" (PDF). NASA. Retrieved 17 December 2024.
  4. ^ "Partial Lunar Eclipse of 1934 Jan 30". EclipseWise.com. Retrieved 17 December 2024.
  5. ^ Mathematical Astronomy Morsels, Jean Meeus, p.110, Chapter 18, The half-saros
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