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A penumbral
lunar eclipse
A lunar eclipse occurs when the Moon moves into the Earth's shadow. Such alignment occurs during an eclipse season, approximately every six months, during the full moon phase, when the Moon's orbital plane is closest to the plane of the Eart ...
took place on Sunday, July 15, 1973, the third of four lunar eclipses in 1973. In this extremely marginal eclipse, the Moon barely clipped the edge of the Earth's penumbral shadow. This caused a microscopic darkening of just 10.468% of the Moon's disc for 1 hour, 39 minutes and 8 seconds, which was essentially impossible to see. This event marking the beginning of the 148th saros cycle for a lunar eclipse. The Moon was only 2.6 days after apogee (Apogee on Thursday, July 12, 1973), making it 5.9% smaller than average.
Visibility
This penumbral eclipse was visible over eastern Asia, Australia, Pacific, western Americas, seen rising over east in Asia, Australia, and setting over the Americas.
Relation to other lunar eclipses
Eclipses in 1973
* An annular solar eclipse on Thursday, 4 January 1973. * A penumbral lunar eclipse on Thursday, 18 January 1973. * A penumbral lunar eclipse on Friday, 15 June 1973. * A total solar eclipse on Saturday, 30 June 1973. * A penumbral lunar eclipse on Sunday, 15 July 1973. * A partial lunar eclipse on Monday, 10 December 1973. * An annular solar eclipse on Monday, 24 December 1973.Lunar year series
Half-Saros cycle
A lunar eclipse will be preceded and followed by solar eclipses by 9 years and 5.5 days (a half saros).Mathematical Astronomy Morsels, Jean Meeus, p.110, Chapter 18, ''The half-saros'' This lunar eclipse is related to two partial solar eclipses ofSolar Saros 155
Saros cycle series 155 for solar eclipse
A solar eclipse occurs when the Moon passes between Earth and the Sun, thereby obscuring the view of the Sun from a small part of the Earth, totally or partially. Such an alignment occurs during an ec ...
on the third and fourth columns.
See also
*List of lunar eclipses
There are several lists of lunar eclipses
On the Moon, by the Earth
; Type
* List of central lunar eclipses
* Total penumbral lunar eclipse
A total penumbral lunar eclipse is a lunar eclipse that occurs when the Moon becomes completely immersed ...
*List of 20th-century lunar eclipses
A total of 229 lunar eclipses took place in the 20th century: 83 penumbral, 65 partial and 81 total.
See also: Lists of lunar eclipses, List of 19th-century lunar eclipses and List of 21st-century lunar eclipses
List
Eclipses from 2001 to ...
Notes
External links
* 1973-07 1973 in science July 1973 events {{lunar-eclipse-stub