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March 1979 lunar eclipse

March 1979 lunar eclipse
Partial eclipse
The Moon's hourly motion shown right to left
DateMarch 13, 1979
Gamma0.5254
Magnitude0.8538
Saros cycle132 (28 of 71)
Partiality197 minutes, 39 seconds
Penumbral350 minutes, 37 seconds
Contacts (UTC)
P118:12:42
U119:29:14
Greatest21:08:02
U422:46:53
P40:03:19

A partial lunar eclipse occurred at the Moon’s ascending node of orbit on Tuesday, March 13, 1979,[1] with an umbral magnitude of 0.8538. A lunar eclipse occurs when the Moon moves into the Earth's shadow, causing the Moon to be darkened. A partial lunar eclipse occurs when one part of the Moon is in the Earth's umbra, while the other part is in 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 3.5 days after apogee (on March 10, 1979, at 10:20 UTC), the Moon's apparent diameter was smaller.[2]

Visibility

The eclipse was completely visible over much of Africa, Europe, and the western half of Asia, seen rising over eastern North America, South America, and west Africa and setting over east and northeast Asia and Australia.[3]

Eclipse details

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

March 13, 1979 Lunar Eclipse Parameters
Parameter Value
Penumbral Magnitude 1.93496
Umbral Magnitude 0.85377
Gamma 0.52537
Sun Right Ascension 23h33m09.8s
Sun Declination -02°53'59.0"
Sun Semi-Diameter 16'05.4"
Sun Equatorial Horizontal Parallax 08.8"
Moon Right Ascension 11h33m44.4s
Moon Declination +03°21'20.5"
Moon Semi-Diameter 14'52.9"
Moon Equatorial Horizontal Parallax 0°54'36.9"
ΔT 49.7 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 February–March 1979
February 26
Descending node (new moon)
 March 13
Ascending node (full moon)
Total solar eclipse
Solar Saros 120		 Partial lunar eclipse
Lunar Saros 132

Eclipses in 1979

Metonic

Tzolkinex

Half-Saros

Tritos

Lunar Saros 132

Inex

Triad

Lunar eclipses of 1977–1980

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 July 27, 1980 occurs in the next lunar year eclipse set.

Lunar eclipse series sets from 1977 to 1980
Ascending node   Descending node
Saros Date
Viewing 		Type
Chart 		Gamma Saros Date
Viewing 		Type
Chart 		Gamma
112 1977 Apr 04
 Partial
 −0.9148 117 1977 Sep 27
 Penumbral
 1.0768
122 1978 Mar 24
 Total
 −0.2140 127 1978 Sep 16
 Total
 0.2951
132 1979 Mar 13
 Partial
 0.5254 137 1979 Sep 06
 Total
 −0.4305
142 1980 Mar 01
 Penumbral
 1.2270 147 1980 Aug 26
 Penumbral
 −1.1608

Saros 132

This eclipse is a part of Saros series 132, repeating every 18 years, 11 days, and containing 71 events. The series started with a penumbral lunar eclipse on May 12, 1492. It contains partial eclipses from August 16, 1636 through March 24, 1997; total eclipses from April 4, 2015 through August 2, 2213; and a second set of partial eclipses from August 13, 2231 through November 30, 2411. The series ends at member 71 as a penumbral eclipse on June 26, 2754.

The longest duration of totality will be produced by member 36 at 106 minutes, 6 seconds on June 9, 2123. 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 2123 Jun 09, lasting 106 minutes, 6 seconds.[7] 		Penumbral Partial Total Central
1492 May 12
 1636 Aug 16
 2015 Apr 04
 2069 May 06
Last
Central Total Partial Penumbral
2177 Jul 11
 2213 Aug 02
 2411 Nov 30
 2754 Jun 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
1804 Jul 22
(Saros 116) 		1815 Jun 21
(Saros 117) 		1826 May 21
(Saros 118) 		1837 Apr 20
(Saros 119) 		1848 Mar 19
(Saros 120)
1859 Feb 17
(Saros 121) 		1870 Jan 17
(Saros 122) 		1880 Dec 16
(Saros 123) 		1891 Nov 16
(Saros 124) 		1902 Oct 17
(Saros 125)
1913 Sep 15
(Saros 126) 		1924 Aug 14
(Saros 127) 		1935 Jul 16
(Saros 128) 		1946 Jun 14
(Saros 129) 		1957 May 13
(Saros 130)
1968 Apr 13
(Saros 131) 		1979 Mar 13
(Saros 132) 		1990 Feb 09
(Saros 133) 		2001 Jan 09
(Saros 134) 		2011 Dec 10
(Saros 135)
2022 Nov 08
(Saros 136) 		2033 Oct 08
(Saros 137) 		2044 Sep 07
(Saros 138) 		2055 Aug 07
(Saros 139) 		2066 Jul 07
(Saros 140)
2077 Jun 06
(Saros 141) 		2088 May 05
(Saros 142) 		2099 Apr 05
(Saros 143) 		2110 Mar 06
(Saros 144) 		2121 Feb 02
(Saros 145)
2132 Jan 02
(Saros 146) 		2142 Dec 03
(Saros 147) 		2153 Nov 01
(Saros 148) 		2164 Sep 30
(Saros 149) 		2175 Aug 31
(Saros 150)
2186 Jul 31
(Saros 151) 		2197 Jun 29
(Saros 152)

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 total solar eclipses of Solar Saros 139.

March 7, 1970 March 18, 1988

See also

Notes

  1. ^ "March 13–14, 1979 Partial Lunar Eclipse". timeanddate. Retrieved 4 January 2025.
  2. ^ "Moon Distances for London, United Kingdom, England". timeanddate. Retrieved 4 January 2025.
  3. ^ "Partial Lunar Eclipse of 1979 Mar 13" (PDF). NASA. Retrieved 4 January 2025.
  4. ^ "Partial Lunar Eclipse of 1979 Mar 13". EclipseWise.com. Retrieved 4 January 2025.
  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 132". eclipse.gsfc.nasa.gov.
  7. ^ Listing of Eclipses of series 132
  8. ^ Mathematical Astronomy Morsels, Jean Meeus, p.110, Chapter 18, The half-saros


Quelle: Https://en.wikipedia.org/wiki/March_1979_lunar_eclipse