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July 1982 lunar eclipse

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July 1982 lunar eclipse
Total eclipse
The Moon's hourly motion shown right to left
DateJuly 6, 1982
Gamma−0.0579
Magnitude1.7180
Saros cycle129 (36 of 71)
Totality105 minutes, 44 seconds
Partiality235 minutes, 35 seconds
Penumbral373 minutes, 51 seconds
Contacts (UTC)
P14:23:58
U15:33:07
U26:38:03
Greatest7:30:55
U38:23:47
U49:28:42
P410:37:49

A total lunar eclipse occurred at the Moon’s descending node of orbit on Tuesday, July 6, 1982,[1] with an umbral magnitude of 1.7180. It was a central lunar eclipse, in which part of the Moon passed through the center of the Earth's shadow. 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 1.2 days after apogee (on July 5, 1982, at 2:30 UTC), the Moon's apparent diameter was smaller.[2]

Visibility

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The eclipse was completely visible over western and central North America, western South America, and Antarctica, seen rising over northwestern North America, Australia, and the western Pacific Ocean and setting over northeastern North America, eastern South America, and west and southern 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 6, 1982 Lunar Eclipse Parameters
Parameter Value
Penumbral Magnitude 2.78600
Umbral Magnitude 1.71795
Gamma −0.05792
Sun Right Ascension 07h00m26.1s
Sun Declination +22°42'50.6"
Sun Semi-Diameter 15'43.9"
Sun Equatorial Horizontal Parallax 08.6"
Moon Right Ascension 19h00m26.1s
Moon Declination -22°45'58.4"
Moon Semi-Diameter 14'43.7"
Moon Equatorial Horizontal Parallax 0°54'03.4"
ΔT 52.6 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 1982
June 21
Ascending node (new moon)
 July 6
Descending node (full moon)
 July 20
Ascending node (new moon)
Partial solar eclipse
Solar Saros 117		 Total lunar eclipse
Lunar Saros 129		 Partial solar eclipse
Solar Saros 155
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Eclipses in 1982

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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 129

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Inex

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Triad

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Lunar eclipses of 1980–1984

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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 eclipses on March 1, 1980 and August 26, 1980 occur in the previous lunar year eclipse set, and the penumbral lunar eclipses on May 15, 1984 and November 8, 1984 occur in the next lunar year eclipse set.

Lunar eclipse series sets from 1980 to 1984
Descending node   Ascending node
Saros Date
Viewing 		Type
Chart 		Gamma Saros Date
Viewing 		Type
Chart 		Gamma
109 1980 Jul 27
 Penumbral
 1.4139 114 1981 Jan 20
 Penumbral
 −1.0142
119 1981 Jul 17
 Partial
 0.7045 124 1982 Jan 09
 Total
 −0.2916
129 1982 Jul 06
 Total
 −0.0579 134 1982 Dec 30
 Total
 0.3758
139 1983 Jun 25
 Partial
 −0.8152 144 1983 Dec 20
 Penumbral
 1.0747
149 1984 Jun 13
 Penumbral
 −1.5240

Saros 129

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This eclipse is a part of Saros series 129, repeating every 18 years, 11 days, and containing 71 events. The series started with a penumbral lunar eclipse on June 10, 1351. It contains partial eclipses from September 26, 1531 through May 11, 1892; total eclipses from May 24, 1910 through September 8, 2090; and a second set of partial eclipses from September 20, 2108 through April 26, 2469. The series ends at member 71 as a penumbral eclipse on July 24, 2613.

The longest duration of totality was produced by member 37 at 106 minutes, 24 seconds on July 16, 2000. All eclipses in this series occur at the Moon’s descending node of orbit.[6]

Greatest First

The greatest eclipse of the series occurred on 2000 Jul 16, lasting 106 minutes, 24 seconds.[7] 		Penumbral Partial Total Central
1351 Jun 10
 1531 Sep 26
 1910 May 24
 1946 Jun 14
Last
Central Total Partial Penumbral
2036 Aug 07
 2090 Sep 08
 2469 Apr 26
 2613 Jul 24

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.

Inex series

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The inex series repeats eclipses 20 days short of 29 years, repeating on average every 10571.95 days. This period is equal to 358 lunations (synodic months) and 388.5 draconic months. Saros series increment by one on successive Inex events and repeat at alternate ascending and descending lunar nodes.

This period is 383.6734 anomalistic months (the period of the Moon's elliptical orbital precession). Despite the average 0.05 time-of-day shift between subsequent events, the variation of the Moon in its elliptical orbit at each event causes the actual eclipse time to vary significantly. It is a part of Lunar Inex series 39.

All events in this series listed below and more are total lunar eclipses.

Inex series from 1000 to 2500 AD
Ascending node Descending node Ascending node Descending node
Saros Date Saros Date Saros Date Saros Date
96 1027 Apr 23 97 1056 Apr 2 98 1085 Mar 14 99 1114 Feb 21
100 1143 Feb 1 101 1172 Jan 13 102 1200 Dec 22 103 1229 Dec 2
104 1258 Nov 12 105 1287 Oct 22 106 1316 Oct 2 107 1345 Sep 12
108 1374 Aug 22 109 1403 Aug 2 110 1432 Jul 13 111 1461 Jun 22
112 1490 Jun 2 113 1519 May 14 114 1548 Apr 22 115 1577 Apr 2
116 1606 Mar 24 117 1635 Mar 3 118 1664 Feb 11 119 1693 Jan 22
120 1722 Jan 2 121 1750 Dec 13 122 1779 Nov 23 123 1808 Nov 3
124 1837 Oct 13 125 1866 Sep 24 126 1895 Sep 4 127 1924 Aug 14
128 1953 Jul 26
 129 1982 Jul 6
 130 2011 Jun 15
 131 2040 May 26
132 2069 May 6
 133 2098 Apr 15
 134 2127 Mar 28 135 2156 Mar 7
136 2185 Feb 14 137 2214 Jan 27 138 2243 Jan 7 139 2271 Dec 17
140 2300 Nov 27 141 2329 Nov 7 142 2358 Oct 18 143 2387 Sep 28
144 2416 Sep 7 145 2445 Aug 17 146 2474 Jul 29

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 total solar eclipses of Solar Saros 136.

June 30, 1973 July 11, 1991

See also

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Notes

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  1. ^ "July 5–6, 1982 Total Lunar Eclipse (Blood Moon)". timeanddate. Retrieved 6 January 2025.
  2. ^ "Moon Distances for London, United Kingdom, England". timeanddate. Retrieved 6 January 2025.
  3. ^ "Total Lunar Eclipse of 1982 Jul 06" (PDF). NASA. Retrieved 6 January 2025.
  4. ^ "Total Lunar Eclipse of 1982 Jul 06". EclipseWise.com. Retrieved 6 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 129". eclipse.gsfc.nasa.gov.
  7. ^ Listing of Eclipses of series 129
  8. ^ Mathematical Astronomy Morsels, Jean Meeus, p.110, Chapter 18, The half-saros
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References

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  • Bao-Lin Liu, Canon of Lunar Eclipses 1500 B.C.-A.D. 3000, 1992


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