December 1936 lunar eclipse

December 1936 lunar eclipse
Penumbral eclipse
The Moon's hourly motion shown right to left
DateDecember 28, 1936
Gamma−1.0971
Magnitude−0.1550
Saros cycle143 (14 of 73)
Penumbral235 minutes, 31 seconds
Contacts (UTC)
P11:50:57
Greatest3:48:45
P45:46:28

A penumbral lunar eclipse occurred at the Moon’s descending node of orbit on Monday, December 28, 1936,[1] with an umbral magnitude of −0.1550. A lunar eclipse occurs when the Moon moves into the Earth's shadow, causing the Moon to be darkened. A penumbral lunar eclipse occurs when part or all of the Moon's near side passes into 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 2.3 days after perigee (on December 25, 1936, at 20:45 UTC), the Moon's apparent diameter was larger.[2]

Visibility

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

Eclipse details

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

December 28, 1936 Lunar Eclipse Parameters
Parameter Value
Penumbral Magnitude 0.84510
Umbral Magnitude −0.15495
Gamma −1.09705
Sun Right Ascension 18h27m15.3s
Sun Declination -23°17'57.2"
Sun Semi-Diameter 16'16.0"
Sun Equatorial Horizontal Parallax 08.9"
Moon Right Ascension 06h26m34.6s
Moon Declination +22°13'08.7"
Moon Semi-Diameter 16'15.9"
Moon Equatorial Horizontal Parallax 0°59'41.6"
ΔT 23.9 s

Eclipse season

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 1936
December 13
Ascending node (new moon)
December 28
Descending node (full moon)
Annular solar eclipse
Solar Saros 131
Penumbral lunar eclipse
Lunar Saros 143

Eclipses in 1936

Metonic

Tzolkinex

Half-Saros

Tritos

Lunar Saros 143

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 143

This eclipse is a part of Saros series 143, repeating every 18 years, 11 days, and containing 72 events. The series started with a penumbral lunar eclipse on August 18, 1720. It contains partial eclipses from March 14, 2063 through June 21, 2225; total eclipses from July 2, 2243 through April 13, 2712; and a second set of partial eclipses from April 25, 2730 through July 9, 2856. The series ends at member 72 as a penumbral eclipse on October 5, 3000.

The longest duration of totality will be produced by member 36 at 99 minutes, 9 seconds on September 6, 2351. 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 2351 Sep 06, lasting 99 minutes, 9 seconds.[7] Penumbral Partial Total Central
1720 Aug 18
2063 Mar 14
2243 Jul 02
2297 Aug 03
Last
Central Total Partial Penumbral
2495 Dec 02
2712 Apr 13
2856 Jul 09
3000 Oct 05

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 2078
1806 Jan 05
(Saros 131)
1816 Dec 04
(Saros 132)
1827 Nov 03
(Saros 133)
1838 Oct 03
(Saros 134)
1849 Sep 02
(Saros 135)
1860 Aug 01
(Saros 136)
1871 Jul 02
(Saros 137)
1882 Jun 01
(Saros 138)
1893 Apr 30
(Saros 139)
1904 Mar 31
(Saros 140)
1915 Mar 01
(Saros 141)
1926 Jan 28
(Saros 142)
1936 Dec 28
(Saros 143)
1947 Nov 28
(Saros 144)
1958 Oct 27
(Saros 145)
1969 Sep 25
(Saros 146)
1980 Aug 26
(Saros 147)
1991 Jul 26
(Saros 148)
2002 Jun 24
(Saros 149)
2013 May 25
(Saros 150)
2078 Nov 19
(Saros 156)

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 partial solar eclipses of Solar Saros 150.

December 24, 1927 January 3, 1946

See also

Notes

  1. ^ "December 27–28, 1936 Penumbral Lunar Eclipse". timeanddate. Retrieved 17 December 2024.
  2. ^ "Moon Distances for London, United Kingdom, England". timeanddate. Retrieved 17 December 2024.
  3. ^ "Penumbral Lunar Eclipse of 1936 Dec 28" (PDF). NASA. Retrieved 17 December 2024.
  4. ^ "Penumbral Lunar Eclipse of 1936 Dec 28". 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 143". eclipse.gsfc.nasa.gov.
  7. ^ Listing of Eclipses of series 143
  8. ^ Mathematical Astronomy Morsels, Jean Meeus, p.110, Chapter 18, The half-saros

Information related to December 1936 lunar eclipse