Total penumbral lunar eclipse

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The penumbral lunar eclipse on March 14, 2006 was a total penumbral eclipse.

A total penumbral eclipse is a lunar eclipse that occurs when the moon becomes completely immersed in the penumbral cone of the Earth without touching the umbra. [1]

It is a narrow path for the moon to pass within the penumbra and outside the umbra. It can happen on the Earth's northern or southern penumbral edges. In addition, the size of the penumbra is sometimes too small where the moon enters it to contain the moon. The width of the Earth's penumbra is determined by the sun's angular diameter at the time of the eclipse, and the moon's angular diameter is larger than the sun over part of its elliptical orbit, depending on whether the eclipse occurs at its nearest (perigee) or farthest point (apogee) in its orbit around the earth. The majority of the time, the size of the moon and the size of the Earth's penumbra where the moon crosses it mean that most eclipses will not be total penumbral in nature.

Frequency[edit]

Such eclipses constitute a relatively small fraction of lunar eclipses, and the distribution of these events is uneven, occurring between 0 and 9 times per century. The period of this variation is about 600 years and also correlates with the frequency of total umbral eclipses and tetrads.

Summary frequency of total penumbral, total umbral and tetrad events 501–2500[edit]

The frequency of total penumbral lunar eclipses varies by century with the frequency of total umbral eclipses.
A tetrad is a set of 4 total umbral eclipses within 2 years.
Century Total
penumbral
Total
umbral
Tetrads
501–600 1 63 0
601–700 2 58 0
701–800 2 69 3
801–900 5 88 8
901–1000 3 78 6
1001–1100 3 62 0
1101–1200 0 60 0
1201–1300 1 60 0
1301–1400 8 77 6
1401–1500 4 83 4
1501–1600 2 76 6
1601–1700 2 61 0
1701–1800 0 60 0
1801–1900 2 62 0
1901–2000 9 81 5
2001–2100 5 84 7
2101–2200 5 69 4
2201–2300 1 61 0
2301–2400 0 60 0
2401–2500 6 69 4

List of total penumbral lunar eclipse events 1901–2100[edit]

Ascending nodes Descending nodes
Saros Date Viewing Chart Saros Date Viewing Chart
110 1901 May 03 Lunar eclipse from moon-1901May03.png Lunar eclipse chart close-1901May03.png
114 1908 Dec 07 Lunar eclipse from moon-1908Jan18.png Lunar eclipse chart close-1908Dec07.png
114 1926 Dec 19 Lunar eclipse from moon-1926Dec19.png Lunar eclipse chart close-1926Dec19.png
114 1944 Dec 29 Lunar eclipse from moon-1944Dec29.png Lunar eclipse chart close-1944Dec29.png
116 1948 Oct 18 Lunar eclipse from moon-1948Oct18.png Lunar eclipse chart close-1948Oct18.png
114 1963 Jan 09 Lunar eclipse from moon-1963Jan09.png Lunar eclipse chart close-1963Jan09.png
114 1981 Jan 20 Lunar eclipse from moon-1981Jan20.png Lunar eclipse chart close-1981Jan20.png 113 1988 Mar 03 Lunar eclipse from moon-1988Mar03.png Lunar eclipse chart close-1988Mar03.png
114 1999 Jan 31 Lunar eclipse from moon-1999Jan31.png Lunar eclipse chart close-1999Jan31.png 113 2006 Mar 14 Lunar eclipse from moon-2006Mar14.png Lunar eclipse chart close-06mar14.png
119 2053 Aug 29 Lunar eclipse chart close-2053Aug29.png
142 2070 Apr 25 Lunar eclipse from moon-2070Apr25.png Lunar eclipse chart close-2070Apr25.png
120 2082 Aug 08 Lunar eclipse from moon-2082Aug08.png Lunar eclipse chart close-2082Aug08.png
148 2099 Sep 29 Lunar eclipse from moon-2099Sep29.png Lunar eclipse chart close-2099Sep29.png

See also[edit]

Notes[edit]