January 2000 lunar eclipse

January 2000 lunar eclipse
Total eclipse
Partial from Buenos Aires, 3:20 UTC
DateJanuary 21, 2000
Gamma−0.2957
Magnitude1.3246
Saros cycle124 (48 of 74)
Totality76 minutes, 59 seconds
Partiality203 minutes, 19 seconds
Penumbral318 minutes, 12 seconds
Contacts (UTC)
P102:04:26
U103:01:50
U204:05:01
Greatest04:43:31
U305:22:00
U406:25:09
P407:22:38

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]

Visibility

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

Eclipse details

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

January 21, 2000 Lunar Eclipse Parameters
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

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 January–February 2000
January 21
Ascending node (full moon)
 February 5
Descending node (new moon)
Total lunar eclipse
Lunar Saros 124		 Partial solar eclipse
Solar Saros 150

Eclipses in 2000

Metonic

Tzolkinex

Half-Saros

Tritos

Lunar Saros 124

Inex

Triad

Lunar eclipses of 1998–2002

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 13, 1998 and September 6, 1998 occur in the previous lunar year eclipse set, and the penumbral lunar eclipses on May 26, 2002 and November 20, 2002 occur in the next lunar year eclipse set.

Lunar eclipse series sets from 1998 to 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
 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

Tritos series

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

Half-Saros cycle

A 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 15, 1991 January 26, 2009

See also

References

  1. ^ "January 20–21, 2000 Total Lunar Eclipse (Blood Moon)". timeanddate. Retrieved 12 November 2024.
  2. ^ "Moon Distances for London, United Kingdom, England". timeanddate. Retrieved 12 November 2024.
  3. ^ "Total Lunar Eclipse of 2000 Jan 21" (PDF). NASA. Retrieved 12 November 2024.
  4. ^ "Total Lunar Eclipse of 2000 Jan 21". EclipseWise.com. Retrieved 12 November 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. ^ Mathematical Astronomy Morsels, Jean Meeus, p.110, Chapter 18, The half-saros
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