A total lunar eclipse occurred at the Moon’s ascending node of orbit on Saturday, January 9, 1982,[1] with an umbral magnitude of 1.3310. 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 1.3 days after perigee (on January 8, 1982, at 11:30 UTC), the Moon's apparent diameter was larger.[2]
| Total eclipse | |||||||||||||||||
 The Moon's hourly motion shown right to left | |||||||||||||||||
| Date | January 9, 1982 | ||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Gamma | −0.2916 | ||||||||||||||||
| Magnitude | 1.3310 | ||||||||||||||||
| Saros cycle | 124 (47 of 74) | ||||||||||||||||
| Totality | 77 minutes, 39 seconds | ||||||||||||||||
| Partiality | 203 minutes, 50 seconds | ||||||||||||||||
| Penumbral | 319 minutes, 6 seconds | ||||||||||||||||
| |||||||||||||||||
Visibility
editThe eclipse was completely visible over much of Africa, Europe, and Asia, seen rising over northeastern North America, eastern South America, and west Africa and setting over Australia and the western Pacific Ocean.[3]
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Eclipse details
editShown below is a table displaying details about this particular solar eclipse. It describes various parameters pertaining to this eclipse.[4]
| Parameter | Value |
|---|---|
| Penumbral Magnitude | 2.31475 |
| Umbral Magnitude | 1.33103 |
| Gamma | −0.29158 |
| Sun Right Ascension | 19h23m18.7s |
| Sun Declination | -22°03'36.2" |
| Sun Semi-Diameter | 16'15.8" |
| Sun Equatorial Horizontal Parallax | 08.9" |
| Moon Right Ascension | 07h23m15.4s |
| Moon Declination | +21°45'55.7" |
| Moon Semi-Diameter | 16'32.0" |
| Moon Equatorial Horizontal Parallax | 1°00'40.7" |
| ΔT | 52.3 s |
Eclipse season
editThis 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.
| January 9 Ascending node (full moon) |
January 25 Descending node (new moon) |
|---|---|
| |
|
| Total lunar eclipse Lunar Saros 124 |
Partial solar eclipse Solar Saros 150 |
Related eclipses
editEclipses in 1982
edit- A total lunar eclipse on January 9.
- A partial solar eclipse on January 25.
- A partial solar eclipse on June 21.
- A total lunar eclipse on July 6.
- A partial solar eclipse on July 20.
- A partial solar eclipse on December 15.
- A total lunar eclipse on December 30.
Metonic
edit- Preceded by: Lunar eclipse of March 24, 1978
- Followed by: Lunar eclipse of October 28, 1985
Tzolkinex
edit- Preceded by: Lunar eclipse of November 29, 1974
- Followed by: Lunar eclipse of February 20, 1989
Half-Saros
edit- Preceded by: Solar eclipse of January 4, 1973
- Followed by: Solar eclipse of January 15, 1991
Tritos
edit- Preceded by: Lunar eclipse of February 10, 1971
- Followed by: Lunar eclipse of December 9, 1992
Lunar Saros 124
edit- Preceded by: Lunar eclipse of December 30, 1963
- Followed by: Lunar eclipse of January 21, 2000
Inex
edit- Preceded by: Lunar eclipse of January 29, 1953
- Followed by: Lunar eclipse of December 21, 2010
Triad
edit- Preceded by: Lunar eclipse of March 11, 1895
- Followed by: Lunar eclipse of November 9, 2068
Lunar eclipses of 1980–1984
editThis 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 | |||||
Half-Saros cycle
editA lunar eclipse will be preceded and followed by solar eclipses by 9 years and 5.5 days (a half saros).[6] This lunar eclipse is related to two annular solar eclipses of Solar Saros 131.
| January 4, 1973 | January 15, 1991 |
|---|---|
|
|
See also
editNotes
edit- ^ "January 9–10, 1982 Total Lunar Eclipse (Blood Moon)". timeanddate. Retrieved 6 January 2025.
- ^ "Moon Distances for London, United Kingdom, England". timeanddate. Retrieved 6 January 2025.
- ^ "Total Lunar Eclipse of 1982 Jan 09" (PDF). NASA. Retrieved 6 January 2025.
- ^ "Total Lunar Eclipse of 1982 Jan 09". EclipseWise.com. Retrieved 6 January 2025.
- ^ 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.
- ^ Mathematical Astronomy Morsels, Jean Meeus, p.110, Chapter 18, The half-saros
External links
edit- 1982 Jan 09 chart Eclipse Predictions by Fred Espenak, NASA/GSFC
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