A partial

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 ...

occurred at the Moon's

descending 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 Tuesday, June 19, 1917, with a

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 0.4729. A

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 ...

passes between

Earth Earth is the third planet from the Sun and the only astronomical object known to Planetary habitability, harbor life. This is enabled by Earth being an ocean world, the only one in the Solar System sustaining liquid surface water. Almost all ...

and the

Sun The Sun is the star at the centre of the Solar System. It is a massive, nearly perfect sphere of hot plasma, heated to incandescence by nuclear fusion reactions in its core, radiating the energy from its surface mainly as visible light a ...

, thereby totally or partly obscuring the image of the Sun for a viewer on Earth. A partial solar eclipse occurs in the polar regions of the Earth when the center of the Moon's shadow misses the Earth. This was the second of four solar eclipses in 1917, with the others occurring on

January 23 Events Pre-1600 * 393 – Roman emperor Theodosius I proclaims his eight-year-old son Honorius co-emperor. * 971 – Using crossbows, Song dynasty troops soundly defeat a war elephant corps of the Southern Han at Shao. * 1229 ...

July 19 Events Pre-1600 * AD 64 – The Great Fire of Rome causes widespread devastation and rages on for six days, destroying half of the city. * 484 – Leontius, Roman usurper, is crowned Eastern emperor at Tarsus (modern Turkey). He is ...

, and

December 14 Events Pre-1600 * 557 – Constantinople is severely damaged by an earthquake, which cracks the dome of Hagia Sophia. * 835 – Sweet Dew Incident: Emperor Wenzong of the Tang dynasty conspires to kill the powerful eunuchs of the ...

. A partial eclipse was visible for parts of northern

North America North America is a continent in the Northern Hemisphere, Northern and Western Hemisphere, Western hemispheres. North America is bordered to the north by the Arctic Ocean, to the east by the Atlantic Ocean, to the southeast by South Ameri ...

Northern Europe The northern region of Europe has several definitions. A restrictive definition may describe northern Europe as being roughly north of the southern coast of the Baltic Sea, which is about 54th parallel north, 54°N, or may be based on other ge ...

, and

North Asia North Asia or Northern Asia () is the northern region of Asia, which is defined in geography, geographical terms and consists of three federal districts of Russia: Ural Federal District, Ural, Siberian Federal District, Siberian, and the Far E ...

Eclipse details

Shown below are two tables displaying details about this particular solar eclipse. The first table outlines times at which the moon's penumbra or umbra attains the specific parameter, and the second table describes various other 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 1917

* A total lunar eclipse on January 8. * A partial solar eclipse on January 23. * A partial solar eclipse on June 19. * A total lunar eclipse on July 4. * A partial solar eclipse on July 19. * An annular solar eclipse on December 14. * A total lunar eclipse on December 28.

Metonic

* Preceded by: Solar eclipse of August 31, 1913 * Followed by: Solar eclipse of April 8, 1921

Tzolkinex

* Preceded by:

Solar eclipse of May 9, 1910 Solar may refer to: Astronomy * Of or relating to the Sun ** Solar telescope, a special purpose telescope used to observe the Sun ** A device that utilizes solar energy (e.g. "solar panels") ** Solar calendar, a calendar whose dates indicate t ...

* Followed by: Solar eclipse of July 31, 1924

Half-Saros

* Preceded by: Lunar eclipse of June 14, 1908 * Followed by: Lunar eclipse of June 25, 1926

Tritos

* Preceded by: Solar eclipse of July 21, 1906 * Followed by: Solar eclipse of May 19, 1928

Solar Saros 116

* Preceded by: Solar eclipse of June 8, 1899 * Followed by:

Solar eclipse of June 30, 1935 A partial solar eclipse occurred at the Moon's descending node of orbit on Sunday, June 30, 1935, with a magnitude of 0.3375. A solar eclipse occurs when the Moon passes between Earth and the Sun, thereby totally or partly obscuring the image of t ...

Inex

* Preceded by:

Solar eclipse of July 9, 1888 Solar may refer to: Astronomy * Of or relating to the Sun ** Solar telescope, a special purpose telescope used to observe the Sun ** A device that utilizes solar energy (e.g. "solar panels") ** Solar calendar, a calendar whose dates indicate t ...

* Followed by: Solar eclipse of May 30, 1946

Triad

* Preceded by:

Solar eclipse of August 18, 1830 During the 19th century, there were 242 solar eclipses of which 87 were Solar eclipse#Types, partial, 77 were annular, 63 were total and 15 were hybrids between total and annular eclipses. In the 19th century, the greatest number of eclipses in ...

* Followed by:

Solar eclipse of April 19, 2004 A partial solar eclipse occurred at the Moon's ascending node of orbit on Monday, April 19, 2004, with a magnitude of 0.7367. A solar eclipse occurs when the Moon passes between Earth and the Sun, thereby totally or partly obscuring the image of t ...

Solar eclipses of 1916–1920

Saros 116

Metonic series

Tritos series

Inex series

Notes

References

External links

{{Solar eclipses 1917 6 19 1917 in science 1917 6 19 June 1917