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Total lunar eclipse of 21 January 2000 From Wikipedia, the free encyclopedia
A total lunar eclipse occurred at the Moon’s ascending node of orbit on Friday, January 21, 2000,[1] with an umbral magnitude of 1.3246. 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 1.5 days after perigee (on January 19, 2000, at 17:50 UTC), the Moon's apparent diameter was larger.[2]
| Total eclipse | |||||||||||||||||
.jpg) Partial from Buenos Aires, 3:20 UTC | |||||||||||||||||
| Date | January 21, 2000 | ||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Gamma | −0.2957 | ||||||||||||||||
| Magnitude | 1.3246 | ||||||||||||||||
| Saros cycle | 124 (48 of 74) | ||||||||||||||||
| Totality | 76 minutes, 59 seconds | ||||||||||||||||
| Partiality | 203 minutes, 19 seconds | ||||||||||||||||
| Penumbral | 318 minutes, 12 seconds | ||||||||||||||||
| |||||||||||||||||
The eclipse was completely visible over most of North America, South America, and western Europe, seen rising over the Pacific Ocean and setting over Africa, Europe, and west Asia.[3]
 |
 Hourly motion shown right to left |
Shown below is a table displaying details about this particular solar eclipse. It describes various parameters pertaining to this eclipse.[4]
| Parameter | Value |
|---|---|
| Penumbral Magnitude | 2.30601 |
| Umbral Magnitude | 1.32459 |
| Gamma | −0.29571 |
| Sun Right Ascension | 20h10m32.9s |
| Sun Declination | -20°03'20.2" |
| Sun Semi-Diameter | 16'15.2" |
| Sun Equatorial Horizontal Parallax | 08.9" |
| Moon Right Ascension | 08h10m24.0s |
| Moon Declination | +19°45'29.3" |
| Moon Semi-Diameter | 16'33.7" |
| Moon Equatorial Horizontal Parallax | 1°00'46.8" |
| ΔT | 63.8 s |
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.
| January 21 Ascending node (full moon) | February 5 Descending node (new moon) |
|---|---|
|  |
| Total lunar eclipse Lunar Saros 124 | Partial solar eclipse Solar Saros 150 |
| Lunar eclipse series sets from 1998–2002 | ||||||||
|---|---|---|---|---|---|---|---|---|
| Descending node | Ascending node | |||||||
| Saros | Date Viewing |
Type Chart |
Gamma | Saros | Date Viewing |
Type Chart |
Gamma | |
| 109 | 1998 Aug 08 |
penumbral |
1.4876 | 114 | 1999 Jan 31 |
penumbral |
−1.0190 | |
| 119 | 1999 Jul 28 |
partial |
0.7863 | 124 |
2000 Jan 21 |
total |
−0.2957 | |
| 129 | 2000 Jul 16 |
total |
0.0302 | 134_(cropped).jpg) |
2001 Jan 09 |
total |
0.3720 | |
| 139 | 2001 Jul 05 |
partial |
−0.7287 | 144 | 2001 Dec 30 |
penumbral |
1.0732 | |
| 149 | 2002 Jun 24 |
penumbral |
−1.4440 | |||||
| Last set | 1998 Sep 06 | Last set | 1998 Mar 13 | |||||
| Next set | 2002 May 26 | Next set | 2002 Nov 20 | |||||
The tritos series repeats 31 days short of 11 years at alternating nodes. Sequential events have incremental Saros cycle indices.
This series produces 20 total eclipses between April 24, 1967 and August 11, 2185, only being partial on November 19, 2021.
| Tritos eclipse series (subset 1901–2087) | ||||||
|---|---|---|---|---|---|---|
| Descending node | Ascending node | |||||
| Saros | Date Viewing |
Type chart |
Saros | Date Viewing |
Type chart | |
| 115 | 1901 Oct 27 |
Partial |
116 | 1912 Sep 26 |
Partial | |
| 117 | 1923 Aug 26 |
Partial |
118 | 1934 Jul 26 |
Partial | |
| 119 | 1945 Jun 25 |
Partial |
120 | 1956 May 24 |
Partial | |
| 121 | 1967 Apr 24 |
Total |
122 | 1978 Mar 24 |
Total | |
| 123 | 1989 Feb 20 |
Total |
124 | 2000 Jan 21 |
Total | |
| 125 | 2010 Dec 21 |
Total |
126 | 2021 Nov 19 |
Partial | |
| 127 | 2032 Oct 18 |
Total |
128 | 2043 Sep 19 |
Total | |
| 129 | 2054 Aug 18 |
Total |
130 | 2065 Jul 17 |
Total | |
| 131 | 2076 Jun 17 |
Total |
132 | 2087 May 17 |
Total | |
| 133 | 2098 Apr 15 |
Total | ||||
A lunar eclipse will be preceded and followed by solar eclipses by 9 years and 5.5 days (a half-saros).[5] This lunar eclipse is related to two annular solar eclipses of Solar Saros 131.
| January 15, 1991 | January 26, 2009 |
|---|---|
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