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July 1935 lunar eclipse

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July 1935 lunar eclipse
Total eclipse
The Moon's hourly motion shown right to left
DateJuly 16, 1935
Gamma0.0672
Magnitude1.7542
Saros cycle128 (36 of 71)
Totality99 minutes, 37 seconds
Partiality214 minutes, 48 seconds
Penumbral325 minutes, 1 seconds
Contacts (UTC)
P12:17:08
U13:12:18
U24:09:53
Greatest4:59:41
U35:49:30
U46:47:06
P47:42:10

A total lunar eclipse occurred at the Moon’s ascending node of orbit on Tuesday, July 16, 1935,[1] with an umbral magnitude of 1.7542. 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 1.9 days before perigee (on July 18, 1935, at 3:35 UTC), the Moon's apparent diameter was larger.[2]

This was a central lunar eclipse, passing through the darkest part of the Moon's shadow.

Visibility

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The eclipse was completely visible over eastern North America, South America, and Antarctica, seen rising over western North America, the central Pacific Ocean, and eastern Australia and setting over much of Europe and Africa.[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]

July 16, 1935 Lunar Eclipse Parameters
Parameter Value
Penumbral Magnitude 2.71461
Umbral Magnitude 1.75423
Gamma 0.06723
Sun Right Ascension 07h38m13.5s
Sun Declination +21°31'47.9"
Sun Semi-Diameter 15'44.1"
Sun Equatorial Horizontal Parallax 08.7"
Moon Right Ascension 19h38m08.9s
Moon Declination -21°27'53.8"
Moon Semi-Diameter 16'23.1"
Moon Equatorial Horizontal Parallax 1°00'08.0"
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 June–July 1935
June 30
Descending node (new moon)		 July 16
Ascending node (full moon)		 July 30
Descending node (new moon)
Partial solar eclipse
Solar Saros 116		 Total lunar eclipse
Lunar Saros 128		 Partial solar eclipse
Solar Saros 154
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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 128

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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

Saros 128

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Lunar saros series 128, repeating every 18 years and 11 days, has a total of 71 lunar eclipse events including 57 umbral eclipses (42 partial lunar eclipses and 15 total lunar eclipses). Solar Saros 135 interleaves with this lunar saros with an event occurring every 9 years 5 days alternating between each saros series.

Greatest First

The greatest eclipse of the series occurred on 1953 Jul 26, lasting 100.7 minutes.[5] 		Penumbral Partial Total Central
1304 Jun 18 1430 Sep 2 1845 May 21 1899 Jun 23
Last
Central Total Partial Penumbral
2007 Aug 28 2097 May 21 2440 May 17 2566 Aug 2
1901–2100
1917 Jul 4 1935 Jul 16 1953 Jul 26
1971 Aug 6 1989 Aug 17 2007 Aug 28
2025 Sep 7 2043 Sep 19 2061 Sep 29
2079 Oct 10 2097 Oct 21

Lunar Saros 128 contains 15 total lunar eclipses between 1845 and 2097 (in years 1845, 1863, 1881, 1899, 1917, 1935, 1953, 1971, 1989, 2007, 2025, 2043, 2061, 2079 and 2097). Solar Saros 135 interleaves with this lunar saros with an event occurring every 9 years 5 days alternating between each saros series.

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).[6] This lunar eclipse is related to two annular solar eclipses of Solar Saros 135.

July 9, 1926 July 20, 1944

See also

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Notes

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  1. ^ "July 15–16, 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 Jul 16" (PDF). NASA. Retrieved 17 December 2024.
  4. ^ "Total Lunar Eclipse of 1935 Jul 16". EclipseWise.com. Retrieved 17 December 2024.
  5. ^ Listing of Eclipses of cycle 128
  6. ^ Mathematical Astronomy Morsels, Jean Meeus, p.110, Chapter 18, The half-saros
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