January 1936 lunar eclipse

January 1936 lunar eclipse
Total eclipse
The Moon's hourly motion shown right to left
DateJanuary 8, 1936
Gamma−0.4429
Magnitude1.0173
Saros cycle133 (22 of 71)
Totality20 minutes, 48 seconds
Partiality202 minutes, 31 seconds
Penumbral342 minutes, 5 seconds
Contacts (UTC)
P115:18:34
U116:28:17
U217:59:09
Greatest18:09:34
U318:19:56
U419:50:48
P421:00:40

A total lunar eclipse occurred at the Moon’s descending node of orbit on Wednesday, January 8, 1936,[1] with an umbral magnitude of 1.0173. 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 6.2 days before apogee (on January 14, 1936, at 23:50 UTC), the Moon's apparent diameter was smaller.[2]

Visibility

The eclipse was completely visible over eastern Europe, Asia, and western Australia, seen rising over Africa andwestern Europe and setting over eastern Australia, northwestern North America, and the central 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]

January 8, 1936 Lunar Eclipse Parameters
Parameter Value
Penumbral Magnitude 2.07396
Umbral Magnitude 1.01725
Gamma −0.44288
Sun Right Ascension 19h15m02.9s
Sun Declination -22°19'38.2"
Sun Semi-Diameter 16'15.9"
Sun Equatorial Horizontal Parallax 08.9"
Moon Right Ascension 07h14m38.5s
Moon Declination +21°55'15.9"
Moon Semi-Diameter 15'23.6"
Moon Equatorial Horizontal Parallax 0°56'29.6"
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 December 1935–January 1936
December 25
Ascending node (new moon)		 January 8
Descending node (full moon)
Annular solar eclipse
Solar Saros 121		 Total lunar eclipse
Lunar Saros 133

Eclipses in 1936

Metonic

Tzolkinex

Half-Saros

Tritos

Lunar Saros 133

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 133

This eclipse is a part of Saros series 133, repeating every 18 years, 11 days, and containing 71 events. The series started with a penumbral lunar eclipse on May 13, 1557. It contains partial eclipses from August 7, 1683 through December 17, 1899; total eclipses from December 28, 1917 through August 3, 2278; and a second set of partial eclipses from August 14, 2296 through March 11, 2639. The series ends at member 71 as a penumbral eclipse on June 29, 2819.

The longest duration of totality will be produced by member 35 at 101 minutes, 41 seconds on May 30, 2170. All eclipses in this series occur at the Moon’s descending node of orbit.[6]

Greatest First
The greatest eclipse of the series will occur on 2170 May 30, lasting 101 minutes, 41 seconds.[7] Penumbral Partial Total Central
1557 May 13
 1683 Aug 07
 1917 Dec 28
 2098 Apr 15
Last
Central Total Partial Penumbral
2224 Jul 01
 2278 Aug 03
 2639 Mar 11
 2819 Jun 29

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.

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 140.

January 3, 1927 January 14, 1945

See also

Notes

  1. ^ "January 8–9, 1936 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 1936 Jan 08" (PDF). NASA. Retrieved 17 December 2024.
  4. ^ "Total Lunar Eclipse of 1936 Jan 08". 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 133". eclipse.gsfc.nasa.gov.
  7. ^ Listing of Eclipses of series 133
  8. ^ Mathematical Astronomy Morsels, Jean Meeus, p.110, Chapter 18, The half-saros