A penumbral

lunar eclipse A lunar eclipse is an astronomical event that occurs when the Moon moves into the Earth's shadow, causing the Moon to be darkened. Such an alignment occurs during an eclipse season, approximately every six months, during the full moon phase, ...

occurred at the Moon’s

ascending node An orbital node is either of the two points where an orbit intersects a plane of reference to which it is inclined. A non-inclined orbit, which is contained in the reference plane, has no nodes. Planes of reference Common planes of referenc ...

of orbit on Monday, September 4, 1933, with an umbral

magnitude Magnitude may refer to: Mathematics *Euclidean vector, a quantity defined by both its magnitude and its direction *Magnitude (mathematics), the relative size of an object *Norm (mathematics), a term for the size or length of a vector *Order of ...

of −0.7336. A lunar eclipse occurs when the

Moon The Moon is Earth's only natural satellite. It Orbit of the Moon, orbits around Earth at Lunar distance, an average distance of (; about 30 times Earth diameter, Earth's diameter). The Moon rotation, rotates, with a rotation period (lunar ...

moves into the Earth's shadow, causing the Moon to be darkened. A penumbral lunar eclipse occurs when part or all of the Moon's near side passes into the Earth's penumbra. Unlike a

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 Earth, totally or partially. Such an alignment occurs approximately every six months, during the eclipse season i ...

, which can only be viewed from a relatively small area of the world, a lunar eclipse may be viewed from anywhere on the

night Night, or nighttime, is the period of darkness when the Sun is below the horizon. Sunlight illuminates one side of the Earth, leaving the other in darkness. The opposite of nighttime is daytime. Earth's rotation causes the appearance of ...

side of Earth. Occurring about 3.9 days after

perigee An apsis (; ) is the farthest or nearest point in the orbit of a planetary body about its primary body. The line of apsides (also called apse line, or major axis of the orbit) is the line connecting the two extreme values. Apsides perta ...

(on August 31, 1933, at 6:30 UTC), the Moon's apparent diameter was larger. This eclipse was the last of four penumbral lunar eclipses in 1933, with the others occurring on

February 10 Events Pre-1600 * 1258 – The Siege of Baghdad ends with the surrender of the last Abbasid caliph to Hulegu Khan, a prince of the Mongol Empire. * 1306 – In front of the high altar of Greyfriars Church in Dumfries, Robert the Bru ...

March 12 Events Pre-1600 * 538 – Vitiges, king of the Ostrogoths ends his siege of Rome and retreats to Ravenna, leaving the city to the victorious Byzantine general, Belisarius. * 1088 – Election of Urban II as the 159th Pope of th ...

, and

August 5 Events Pre-1600 * AD 25 – Guangwu claims the throne as Emperor of China, restoring the Han dynasty after the collapse of the short-lived Xin dynasty. * 70 – Fires resulting from the destruction of the Second Temple in Jerusalem are ...

Visibility

The eclipse was completely visible over much of

North North is one of the four compass points or cardinal directions. It is the opposite of south and is perpendicular to east and west. ''North'' is a noun, adjective, or adverb indicating Direction (geometry), direction or geography. Etymology T ...

and

South America South America is a continent entirely in the Western Hemisphere and mostly in the Southern Hemisphere, with a considerably smaller portion in the Northern Hemisphere. It can also be described as the southern Subregion#Americas, subregion o ...

, seen rising over northwestern North America and the central

Pacific Ocean The Pacific Ocean is the largest and deepest of Earth's five Borders of the oceans, oceanic divisions. It extends from the Arctic Ocean in the north to the Southern Ocean, or, depending on the definition, to Antarctica in the south, and is ...

and setting over

Africa Africa is the world's second-largest and second-most populous continent after Asia. At about 30.3 million km2 (11.7 million square miles) including adjacent islands, it covers 20% of Earth's land area and 6% of its total surfac ...

and

Europe Europe is a continent located entirely in the Northern Hemisphere and mostly in the Eastern Hemisphere. It is bordered by the Arctic Ocean to the north, the Atlantic Ocean to the west, the Mediterranean Sea to the south, and Asia to the east ...

Eclipse details

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

Eclipse season

This eclipse is part of an

eclipse season An eclipse season is a period, roughly every six months, when eclipses occur. Eclipse seasons are the result of the axial parallelism of the Orbit of the Moon, Moon's orbital plane (orbital inclination, tilted five degrees to the ecliptic, Earth ...

, 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 A fortnight is a unit of time equal to 14 days (two weeks). The word derives from the Old English term , meaning "" (or "fourteen days", since the Anglo-Saxons counted by nights). Astronomy and tides In astronomy, a ''lunar fortnight'' is hal ...

. The first and last eclipse in this sequence is separated by one

synodic month In lunar calendars, a lunar month is the time between two successive Syzygy (astronomy), syzygies of the same type: new moons or full moons. The precise definition varies, especially for the beginning of the month. Variations In Shona people, S ...

Related eclipses

Eclipses in 1933

* A penumbral lunar eclipse on February 10. * An annular solar eclipse on February 24. * A penumbral lunar eclipse on March 12. * A penumbral lunar eclipse on August 5. * An annular solar eclipse on August 21. * A penumbral lunar eclipse on September 4.

Metonic

* Preceded by: Lunar eclipse of November 17, 1929

Tzolkinex

* Preceded by: Lunar eclipse of July 25, 1926 * Followed by: Lunar eclipse of October 16, 1940

Half-Saros

* Preceded by: Solar eclipse of August 30, 1924 * Followed by: Solar eclipse of September 10, 1942

Tritos

* Preceded by: Lunar eclipse of October 6, 1922 * Followed by: Lunar eclipse of August 4, 1944

Lunar Saros 146

* Preceded by: Lunar eclipse of August 24, 1915 * Followed by: Lunar eclipse of September 15, 1951

Inex

* Preceded by: Lunar eclipse of September 24, 1904 * Followed by: Lunar eclipse of August 15, 1962

Triad

* Preceded by: Lunar eclipse of November 3, 1846 * Followed by: Lunar eclipse of July 5, 2020

Lunar eclipses of 1930–1933

Saros 146

Tritos series

Inex 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 total solar eclipses of Solar Saros 153.

References

External links

Saros series 146
* {{DEFAULTSORT:Lunar eclipse 1933-09 1933-09 1933 in science