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June 1955 lunar eclipse

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June 1955 lunar eclipse
Penumbral eclipse
The Moon's hourly motion shown right to left
DateJune 5, 1955
Gamma−1.2384
Magnitude−0.4498
Saros cycle110 (68 of 72)
Penumbral232 minutes, 18 seconds
Contacts (UTC)
P112:26:43
Greatest14:22:52
P416:19:01

A penumbral lunar eclipse occurred at the Moon’s ascending node of orbit on Sunday, June 5, 1955,[1] with an umbral magnitude of −0.4498. 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 only about 11 hours after apogee (on June 5, 1955, at 3:45 UTC), the Moon's apparent diameter was smaller.[2]

Visibility

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The eclipse was completely visible over east, Australia, and Antarctica, seen rising over the western half of Asia and east Africa and setting over the eastern Pacific Ocean.[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]

June 5, 1955 Lunar Eclipse Parameters
Parameter Value
Penumbral Magnitude 0.62181
Umbral Magnitude −0.44978
Gamma −1.23842
Sun Right Ascension 04h51m12.9s
Sun Declination +22°30'11.9"
Sun Semi-Diameter 15'45.8"
Sun Equatorial Horizontal Parallax 08.7"
Moon Right Ascension 16h51m07.1s
Moon Declination -23°37'02.2"
Moon Semi-Diameter 14'42.6"
Moon Equatorial Horizontal Parallax 0°53'59.1"
ΔT 31.2 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.

Eclipse season of June 1955
June 5
Ascending node (full moon)		 June 20
Descending node (new moon)
Penumbral lunar eclipse
Lunar Saros 110		 Total solar eclipse
Solar Saros 136
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Eclipses in 1955

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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 110

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Inex

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Triad

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Lunar eclipses of 1955–1958

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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 January 8, 1955 occurs in the previous lunar year eclipse set, and the penumbral lunar eclipse on April 4, 1958 occurs in the next lunar year eclipse set.

Lunar eclipse series sets from 1955 to 1958
Ascending node   Descending node
Saros Date
Viewing 		Type
Chart 		Gamma Saros Date
Viewing 		Type
Chart 		Gamma
110 1955 Jun 05
 Penumbral
 −1.2384 115 1955 Nov 29
 Partial
 0.9551
120 1956 May 24
 Partial
 −0.4726 125 1956 Nov 18
 Total
 0.2917
130 1957 May 13
 Total
 0.3046 135 1957 Nov 07
 Total
 −0.4332
140 1958 May 03
 Partial
 1.0188 145 1958 Oct 27
 Penumbral
 −1.1571

Saros 110

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This eclipse is a part of Saros series 110, repeating every 18 years, 11 days, and containing 72 events. The series started with a penumbral lunar eclipse on May 28, 747 AD. It contains partial eclipses from August 23, 891 AD through April 18, 1288; total eclipses from April 29, 1306 through September 5, 1522; and a second set of partial eclipses from September 16, 1540 through April 22, 1883. The series ends at member 72 as a penumbral eclipse on July 18, 2027.

The longest duration of totality was produced by member 38 at 103 minutes, 8 seconds on July 3, 1414. 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 1414 Jul 03, lasting 103 minutes, 8 seconds.[7] Penumbral Partial Total Central
747 May 28
 891 Aug 23
 1306 Apr 29
 1360 May 31
Last
Central Total Partial Penumbral
1468 Aug 04
 1522 Sep 05
 1883 Apr 22
 2027 Jul 18

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

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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 1835 and 2200
1835 May 12
(Saros 99) 		1846 Apr 11
(Saros 100) 		1868 Feb 08
(Saros 102) 		1879 Jan 08
(Saros 103)
1933 Aug 05
(Saros 108)
1944 Jul 06
(Saros 109) 		1955 Jun 05
(Saros 110) 		1966 May 04
(Saros 111) 		1977 Apr 04
(Saros 112) 		1988 Mar 03
(Saros 113)
1999 Jan 31
(Saros 114) 		2009 Dec 31
(Saros 115) 		2020 Nov 30
(Saros 116) 		2031 Oct 30
(Saros 117) 		2042 Sep 29
(Saros 118)
2053 Aug 29
(Saros 119) 		2064 Jul 28
(Saros 120) 		2075 Jun 28
(Saros 121) 		2086 May 28
(Saros 122) 		2097 Apr 26
(Saros 123)
2108 Mar 27
(Saros 124) 		2119 Feb 25
(Saros 125) 		2130 Jan 24
(Saros 126) 		2140 Dec 23
(Saros 127) 		2151 Nov 24
(Saros 128)
2162 Oct 23
(Saros 129) 		2173 Sep 21
(Saros 130) 		2184 Aug 21
(Saros 131) 		2195 Jul 22
(Saros 132)

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).[8] This lunar eclipse is related to two partial solar eclipses of Solar Saros 117.

May 30, 1946 June 10, 1964

See also

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Notes

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  1. ^ "June 5–6, 1955 Penumbral Lunar Eclipse". timeanddate. Retrieved 23 December 2024.
  2. ^ "Moon Distances for London, United Kingdom, England". timeanddate. Retrieved 23 December 2024.
  3. ^ "Penumbral Lunar Eclipse of 1955 Jun 05" (PDF). NASA. Retrieved 23 December 2024.
  4. ^ "Penumbral Lunar Eclipse of 1955 Jun 05". EclipseWise.com. Retrieved 23 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 110". eclipse.gsfc.nasa.gov.
  7. ^ Listing of Eclipses of series 110
  8. ^ Mathematical Astronomy Morsels, Jean Meeus, p.110, Chapter 18, The half-saros
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