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Tetrad

From HandWiki - Reading time: 2 min

Short description: A set of four total lunar eclipses within two years
Inex and saros for tetrads between AD 1000 and 2500, showing the tetradia
Total penumbral eclipse frequency by century.png

In astronomy, a tetrad is a set of four total lunar eclipses within two consecutive years.[1]

The frequency of tetrads varies by century with the frequency of total lunar eclipses. This repeating cycle is called a tetradia. See Eclipse cycle for more information.

List of tetrad events

1949–2000

Saros Date
Viewing
Type
Chart
Saros Date
Viewing
Type
Chart
1949–50
Descending node   Ascending node
121 1949 Apr 13
Lunar eclipse from moon-1949Apr13.png
Total
Lunar eclipse chart close-1949Apr13.png
126 1949 Oct 07
Lunar eclipse from moon-1949Oct07.png
Total
Lunar eclipse chart close-1949Oct07.png
131 1950 Apr 02
Lunar eclipse from moon-1950Apr02.png
Total
Lunar eclipse chart close-1950Apr02.png
136 1950 Sep 26
Lunar eclipse from moon-1950Sep26.png
Total
Lunar eclipse chart close-1950Sep26.png
1967–68
Descending node   Ascending node
121 1967 Apr 24
Lunar eclipse from moon-1967Apr24.png
Total
Lunar eclipse chart close-1967Apr24.png
126 1967 Oct 18
Lunar eclipse from moon-1967Oct18.png
Total
Lunar eclipse chart close-1967Oct18.png
131 1968 Apr 13
Lunar eclipse from moon-1968Apr13.png
Total
Lunar eclipse chart close-1968Apr13.png
136 1968 Oct 6
Lunar eclipse from moon-1968Oct06.png
Total
Lunar eclipse chart close-1968Oct06.png
1985–86
Descending node   Ascending node
121 1985 May 04
Lunar eclipse from moon-1985May04.png
Total
Lunar eclipse chart close-1985May04.png
126 1985 Oct 28
Lunar eclipse from moon-1985Oct28.png
Total
Lunar eclipse chart close-1985Oct28.png
131 1986 Apr 24
Lunar eclipse from moon-1986Apr24.png
Total
Lunar eclipse chart close-1986Apr24.png
136 1986 Oct 17
Lunar eclipse from moon-1986Oct17.png
Total
Lunar eclipse chart close-1986Oct17.png

2001–51

Saros Date
Viewing
Type
Chart
Saros Date
Viewing
Type
Chart
2003–04
Descending node   Ascending node
121
Lunar eclipse May 2003-TLR75.jpg
2003 May 16
Lunar eclipse from moon-2003May16.png
total
Lunar eclipse chart close-03may16.png
126
Lunar eclipse November 2003-TLR63.jpg
2003 Nov 09
Lunar eclipse from moon-2003Nov09.png
total
Lunar eclipse chart close-03nov09.png
131
Total lunar eclipse May 4 2004-Jpeter smith.jpg
2004 May 04
Lunar eclipse from moon-2004May04.png
total
Lunar eclipse chart close-04may04.png
136
Oct 28 2004 total lunar eclipse-espenak.png
2004 Oct 28
Lunar eclipse from moon-2004Oct28.png
total
Lunar eclipse chart close-04oct28.png
2014–15
Ascending node   Descending node
122
Lunar eclipse April 15 2014 California Alfredo Garcia Jr1.jpg
2014 Apr 15
Lunar eclipse from moon-2014Apr15.png
Total
Lunar eclipse chart close-2014Apr15.png
127
Lunar eclipse October 8 2014 California Alfredo Garcia Jr mideclipse.JPG
2014 Oct 08
Lunar eclipse from moon-2014Oct08.png
Total
Lunar eclipse chart close-2014Oct08.png
132
Lunar eclipse April 4 2015 greatest Alfredo Garcia Jr LA.jpg
2015 Apr 04
Lunar eclipse from moon-2015Apr04.png
Total
Lunar eclipse chart close-2015Apr04.png
137
Lunar eclipse September 27 2015 greatest Alfredo Garcia Jr.jpg
2015 Sep 28
Lunar eclipse from moon-2015Sep28.png
Total
Lunar eclipse chart close-2015Sep28.png
2032–33
Ascending node   Descending node
122 2032 Apr 25
Lunar eclipse from moon-2032Apr25.png
Total
Lunar eclipse chart close-2032Apr25.png
127 2032 Oct 18
Lunar eclipse from moon-2032Oct18.png
Total
Lunar eclipse chart close-2032Oct18.png
132 2033 Apr 14
Lunar eclipse from moon-2033Apr14.png
Total
Lunar eclipse chart close-2033Apr14.png
137 2033 Oct 08
Lunar eclipse from moon-2033Oct08.png
Total
Lunar eclipse chart close-2033Oct08.png
2043–44
Descending node   Ascending node
123 2043 Mar 25
Lunar eclipse from moon-2043Mar25.png
Total
Lunar eclipse chart close-2043Mar25.png
128 2043 Sep 19
Lunar eclipse from moon-2043Sep19.png
Total
Lunar eclipse chart close-2043Sep19.png
133 2044 Mar 13
Lunar eclipse from moon-2044Mar13.png
Total
Lunar eclipse chart close-2044Mar13.png
138 2044 Sep 07
Lunar eclipse from moon-2044Sep07.png
Total
Lunar eclipse chart close-2044Sep07.png
2050–51
Ascending node   Descending node
122 2050 May 06
Lunar eclipse from moon-2050May06.png
Total
Lunar eclipse chart close-2050May06.png
127 2050 Oct 30
Lunar eclipse from moon-2050Oct30.png
Total
Lunar eclipse chart close-2050Oct30.png
132 2051 Apr 26
Lunar eclipse from moon-2051Apr26.png
Total
Lunar eclipse chart close-2051Apr26.png
137 2051 Oct 19
Lunar eclipse from moon-2051Oct19.png
Total
Lunar eclipse chart close-2051Oct19.png

See also

References





Licensed under CC BY-SA 3.0 | Source: https://handwiki.org/wiki/Astronomy:Tetrad
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