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May 1939 lunar eclipse

May 1939 lunar eclipse
Total eclipse
The Moon's hourly motion shown right to left
DateMay 3, 1939
Gamma0.3693
Magnitude1.1765
Saros cycle130 (30 of 72)
Totality62 minutes, 23 seconds
Partiality207 minutes, 3 seconds
Penumbral333 minutes, 31 seconds
Contacts (UTC)
P112:24:35
U113:27:45
U214:40:06
Greatest15:11:18
U315:42:28
U416:54:48
P417:58:06

A total lunar eclipse occurred at the Moon’s ascending node of orbit on Wednesday, May 3, 1939,[1] with an umbral magnitude of 1.1765. 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 5.2 days after perigee (on April 28, 1939, at 11:05 UTC), the Moon's apparent diameter was larger.[2]

This lunar eclipse was the third of an almost tetrad, with the others being on May 14, 1938 (total); November 7, 1938 (total); and October 28, 1939 (partial).

Visibility

The eclipse was completely visible over east Asia, Australia, and Antarctica, seen rising over central and east Africa, eastern Europe, and west, central, and south Asia and setting over western North America and the eastern Pacific Ocean.[3]

Eclipse details

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

May 3, 1939 Lunar Eclipse Parameters
Parameter Value
Penumbral Magnitude 2.18417
Umbral Magnitude 1.17649
Gamma 0.36934
Sun Right Ascension 02h39m22.9s
Sun Declination +15°31'43.2"
Sun Semi-Diameter 15'51.8"
Sun Equatorial Horizontal Parallax 08.7"
Moon Right Ascension 14h39m41.4s
Moon Declination -15°10'51.4"
Moon Semi-Diameter 15'44.6"
Moon Equatorial Horizontal Parallax 0°57'46.6"
ΔT 24.2 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 April–May 1939
April 19
Descending node (new moon)		 May 3
Ascending node (full moon)
Annular solar eclipse
Solar Saros 118		 Total lunar eclipse
Lunar Saros 130

Eclipses in 1939

Metonic

Tzolkinex

Half-Saros

Tritos

Lunar Saros 130

Inex

Triad

Lunar eclipses of 1937–1940

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 eclipse on March 23, 1940 occurs in the next lunar year eclipse set.

Lunar eclipse series sets from 1937 to 1940
Ascending node   Descending node
Saros Date
Viewing 		Type
Chart 		Gamma Saros Date
Viewing 		Type
Chart 		Gamma
110 1937 May 25
 Penumbral
 −1.1582 115 1937 Nov 18
 Partial
 0.9421
120 1938 May 14
 Total
 −0.3994 125 1938 Nov 07
 Total
 0.2739
130 1939 May 03
 Total
 0.3693 135 1939 Oct 28
 Partial
 −0.4581
140 1940 Apr 22
 Penumbral
 1.0741 145 1940 Oct 16
 Penumbral
 −1.1925

Saros 130

This eclipse is a part of Saros series 130, repeating every 18 years, 11 days, and containing 71 events. The series started with a penumbral lunar eclipse on June 10, 1416. It contains partial eclipses from September 4, 1560 through April 12, 1903; total eclipses from April 22, 1921 through September 11, 2155; and a second set of partial eclipses from September 21, 2173 through May 10, 2552. The series ends at member 71 as a penumbral eclipse on July 26, 2678.

The longest duration of totality will be produced by member 35 at 101 minutes, 53 seconds on June 26, 2029. All eclipses in this series occur at the Moon’s ascending node of orbit.[6]

Greatest First

The greatest eclipse of the series will occur on 2029 Jun 26, lasting 101 minutes, 53 seconds.[7] 		Penumbral Partial Total Central
1416 Jun 10
 1560 Sep 04
 1921 Apr 22
 1975 May 25
Last
Central Total Partial Penumbral
2083 Jul 29
 2155 Sep 11
 2552 May 10
 2678 Jul 26

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
1808 May 10
(Saros 118) 		1819 Apr 10
(Saros 119) 		1830 Mar 09
(Saros 120) 		1841 Feb 06
(Saros 121) 		1852 Jan 07
(Saros 122)
1862 Dec 06
(Saros 123) 		1873 Nov 04
(Saros 124) 		1884 Oct 04
(Saros 125) 		1895 Sep 04
(Saros 126) 		1906 Aug 04
(Saros 127)
1917 Jul 04
(Saros 128) 		1928 Jun 03
(Saros 129) 		1939 May 03
(Saros 130) 		1950 Apr 02
(Saros 131) 		1961 Mar 02
(Saros 132)
1972 Jan 30
(Saros 133) 		1982 Dec 30
(Saros 134) 		1993 Nov 29
(Saros 135) 		2004 Oct 28
(Saros 136) 		2015 Sep 28
(Saros 137)
2026 Aug 28
(Saros 138) 		2037 Jul 27
(Saros 139) 		2048 Jun 26
(Saros 140) 		2059 May 27
(Saros 141) 		2070 Apr 25
(Saros 142)
2081 Mar 25
(Saros 143) 		2092 Feb 23
(Saros 144) 		2103 Jan 23
(Saros 145) 		2113 Dec 22
(Saros 146) 		2124 Nov 21
(Saros 147)
2135 Oct 22
(Saros 148) 		2146 Sep 20
(Saros 149) 		2157 Aug 20
(Saros 150) 		2168 Jul 20
(Saros 151) 		2179 Jun 19
(Saros 152)
2190 May 19
(Saros 153)

Inex series

The inex series repeats eclipses 20 days short of 29 years, repeating on average every 10571.95 days. This period is equal to 358 lunations (synodic months) and 388.5 draconic months. Saros series increment by one on successive Inex events and repeat at alternate ascending and descending lunar nodes.

This period is 383.6734 anomalistic months (the period of the Moon's elliptical orbital precession). Despite the average 0.05 time-of-day shift between subsequent events, the variation of the Moon in its elliptical orbit at each event causes the actual eclipse time to vary significantly. It is a part of Lunar Inex series 35.

Series events from 1500–2500
Descending node Ascending node Descending node Ascending node
Saros Date
Chart 		Saros Date
Chart 		Saros Date
Chart 		Saros Date
Chart
115 1505 Feb 18
 116 1534 Jan 30
 117 1563 Jan 9 118 1591 Dec 30
119 1620 Dec 9 120 1649 Nov 19 121 1678 Oct 29 122 1707 Oct 11
123 1736 Sep 20 124 1765 Aug 30 125 1794 Aug 11 126 1823 Jul 23
127 1852 Jul 1 128 1881 Jun 12 129 1910 May 24
 130 1939 May 3
131 1968 Apr 13
 132 1997 Mar 24
 133 2026 Mar 3
 134 2055 Feb 11
135 2084 Jan 22
 136 2113 Jan 2 137 2141 Dec 13 138 2170 Nov 23
139 2199 Nov 2 140 2228 Oct 14 141 2257 Sep 24 142 2286 Sep 3
143 2315 Aug 16 144 2344 Jul 26 145 2373 Jul 5 146 2402 Jun 16
147 2431 May 27 148 2460 May 5
 149 2489 Apr 16

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 solar eclipses of Solar Saros 137.

April 28, 1930 May 9, 1948

See also

Notes

  1. ^ "May 3–4, 1939 Total Lunar Eclipse (Blood Moon)". timeanddate. Retrieved 18 December 2024.
  2. ^ "Moon Distances for London, United Kingdom, England". timeanddate. Retrieved 18 December 2024.
  3. ^ "Total Lunar Eclipse of 1939 May 03" (PDF). NASA. Retrieved 18 December 2024.
  4. ^ "Total Lunar Eclipse of 1939 May 03". EclipseWise.com. Retrieved 18 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 130". eclipse.gsfc.nasa.gov.
  7. ^ Listing of Eclipses of series 130
  8. ^ Mathematical Astronomy Morsels, Jean Meeus, p.110, Chapter 18, The half-saros


Quelle: Https://en.wikipedia.org/wiki/May_1939_lunar_eclipse