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July 1934 lunar eclipse

July 1934 lunar eclipse
Partial eclipse
The Moon's hourly motion shown right to left
DateJuly 26, 1934
Gamma−0.6681
Magnitude0.6612
Saros cycle118 (47 of 74)
Partiality160 minutes, 49 seconds
Penumbral285 minutes, 41 seconds
Contacts (UTC)
P19:52:23
U110:54:49
Greatest12:15:14
U413:35:38
P414:38:04

A partial lunar eclipse occurred at the Moon’s ascending node of orbit on Thursday, July 26, 1934,[1] with an umbral magnitude of 0.6612. 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 only about an hour after perigee (on July 26, 1934, at 11:20 UTC), the Moon's apparent diameter was larger.[2]

Visibility

The eclipse was completely visible over Australia and Antarctica, seen rising over south and east Asia and setting over much of North and South America.[3]

Eclipse details

Shown below is a table displaying details about this particular solar eclipse. It describes various parameters pertaining to this eclipse.[4]

July 26, 1934 Lunar Eclipse Parameters
Parameter Value
Penumbral Magnitude 1.60248
Umbral Magnitude 0.66121
Gamma −0.66811
Sun Right Ascension 08h20m22.6s
Sun Declination +19°32'24.6"
Sun Semi-Diameter 15'44.9"
Sun Equatorial Horizontal Parallax 08.7"
Moon Right Ascension 20h21m19.0s
Moon Declination -20°11'13.8"
Moon Semi-Diameter 16'43.9"
Moon Equatorial Horizontal Parallax 1°01'24.3"
ΔT 23.8 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 July–August 1934
July 26
Ascending node (full moon)		 August 10
Descending node (new moon)
Partial lunar eclipse
Lunar Saros 118		 Annular solar eclipse
Solar Saros 144

Eclipses in 1934

Metonic

Tzolkinex

Half-Saros

Tritos

Lunar Saros 118

Inex

Triad

Lunar eclipses of 1933–1936

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 118

This eclipse is a part of Saros series 118, repeating every 18 years, 11 days, and containing 73 events. The series started with a penumbral lunar eclipse on March 2, 1105. It contains partial eclipses from June 8, 1267 through August 12, 1375; total eclipses from August 22, 1393 through June 22, 1880; and a second set of partial eclipses from July 3, 1898 through September 18, 2024. The series ends at member 73 as a penumbral eclipse on May 7, 2403.

The longest duration of totality was produced by member 37 at 99 minutes, 22 seconds on April 7, 1754. All eclipses in this series occur at the Moon’s ascending node of orbit.[6]

Greatest First
The greatest eclipse of the series occurred on 1754 Apr 07, lasting 99 minutes, 22 seconds.[7] Penumbral Partial Total Central
1105 Mar 02
 1267 Jun 08
 1393 Aug 22
 1465 Oct 04
Last
Central Total Partial Penumbral
1826 May 21
 1880 Jun 22
 2024 Sep 18
 2403 May 07

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

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
1803 Aug 03
(Saros 106) 		1814 Jul 02
(Saros 107) 		1825 Jun 01
(Saros 108) 		1836 May 01
(Saros 109) 		1847 Mar 31
(Saros 110)
1858 Feb 27
(Saros 111) 		1869 Jan 28
(Saros 112) 		1879 Dec 28
(Saros 113) 		1890 Nov 26
(Saros 114) 		1901 Oct 27
(Saros 115)
1912 Sep 26
(Saros 116) 		1923 Aug 26
(Saros 117) 		1934 Jul 26
(Saros 118) 		1945 Jun 25
(Saros 119) 		1956 May 24
(Saros 120)
1967 Apr 24
(Saros 121) 		1978 Mar 24
(Saros 122) 		1989 Feb 20
(Saros 123) 		2000 Jan 21
(Saros 124) 		2010 Dec 21
(Saros 125)
2021 Nov 19
(Saros 126) 		2032 Oct 18
(Saros 127) 		2043 Sep 19
(Saros 128) 		2054 Aug 18
(Saros 129) 		2065 Jul 17
(Saros 130)
2076 Jun 17
(Saros 131) 		2087 May 17
(Saros 132) 		2098 Apr 15
(Saros 133) 		2109 Mar 17
(Saros 134) 		2120 Feb 14
(Saros 135)
2131 Jan 13
(Saros 136) 		2141 Dec 13
(Saros 137) 		2152 Nov 12
(Saros 138) 		2163 Oct 12
(Saros 139) 		2174 Sep 11
(Saros 140)
2185 Aug 11
(Saros 141) 		2196 Jul 10
(Saros 142)

Half-Saros cycle

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 125.

July 20, 1925 August 1, 1943

See also

Notes

  1. ^ "July 26, 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 Jul 26" (PDF). NASA. Retrieved 17 December 2024.
  4. ^ "Partial Lunar Eclipse of 1934 Jul 26". 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 118". eclipse.gsfc.nasa.gov.
  7. ^ Listing of Eclipses of series 118
  8. ^ Mathematical Astronomy Morsels, Jean Meeus, p.110, Chapter 18, The half-saros
Quelle: https://en.wikipedia.org/wiki/July_1934_lunar_eclipse