An annular

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, November 23, 1965, 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 0.9656. 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. An annular solar eclipse occurs when the Moon's

apparent diameter The angular diameter, angular size, apparent diameter, or apparent size is an angular separation (in units of angle) describing how large a sphere or circle appears from a given point of view. In the vision sciences, it is called the '' visual ...

is smaller than the Sun's, blocking most of the Sun's light and causing the Sun to look like an

annulus Annulus (or anulus) or annular indicates a ring- or donut-shaped area or structure. It may refer to: Human anatomy * ''Anulus fibrosus disci intervertebralis'', spinal structure * Annulus of Zinn, a.k.a. annular tendon or ''anulus tendineus comm ...

(ring). An annular eclipse appears as a partial eclipse over a region of the Earth thousands of kilometres wide. Occurring about 6.3 days before

apogee 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 November 29, 1965, at 12:00 UTC), the Moon's apparent diameter was smaller. Annularity was visible from the

Soviet Union The Union of Soviet Socialist Republics. (USSR), commonly known as the Soviet Union, was a List of former transcontinental countries#Since 1700, transcontinental country that spanned much of Eurasia from 1922 until Dissolution of the Soviet ...

(today's eastern

Turkmenistan Turkmenistan is a landlocked country in Central Asia bordered by Kazakhstan to the northwest, Uzbekistan to the north, east and northeast, Afghanistan to the southeast, Iran to the south and southwest and the Caspian Sea to the west. Ash ...

, southern

Uzbekistan , image_flag = Flag of Uzbekistan.svg , image_coat = Emblem of Uzbekistan.svg , symbol_type = Emblem of Uzbekistan, Emblem , national_anthem = "State Anthem of Uzbekistan, State Anthem of the Republ ...

and southwestern

Tajikistan Tajikistan, officially the Republic of Tajikistan, is a landlocked country in Central Asia. Dushanbe is the capital city, capital and most populous city. Tajikistan borders Afghanistan to the Afghanistan–Tajikistan border, south, Uzbekistan to ...

Afghanistan Afghanistan, officially the Islamic Emirate of Afghanistan, is a landlocked country located at the crossroads of Central Asia and South Asia. It is bordered by Pakistan to the Durand Line, east and south, Iran to the Afghanistan–Iran borde ...

West Pakistan West Pakistan was the western province of Pakistan between One Unit, 1955 and Legal Framework Order, 1970, 1970, covering the territory of present-day Pakistan. Its land borders were with Afghanistan, India and Iran, with a maritime border wit ...

India India, officially the Republic of India, is a country in South Asia. It is the List of countries and dependencies by area, seventh-largest country by area; the List of countries by population (United Nations), most populous country since ...

China China, officially the People's Republic of China (PRC), is a country in East Asia. With population of China, a population exceeding 1.4 billion, it is the list of countries by population (United Nations), second-most populous country after ...

Nepal Nepal, officially the Federal Democratic Republic of Nepal, is a landlocked country in South Asia. It is mainly situated in the Himalayas, but also includes parts of the Indo-Gangetic Plain. It borders the Tibet Autonomous Region of China Ch ...

(including the capital city

Kathmandu Kathmandu () is the capital and largest city of Nepal, situated in the central part of the country within the Kathmandu Valley. As per the 2021 Nepal census, it has a population of 845,767 residing in 105,649 households, with approximately 4 mi ...

), southwestern

Sikkim Sikkim ( ; ) is a States and union territories of India, state in northeastern India. It borders the Tibet Autonomous Region of China in the north and northeast, Bhutan in the east, Koshi Province of Nepal in the west, and West Bengal in the ...

(now merged with India),

East Pakistan East Pakistan was the eastern province of Pakistan between 1955 and 1971, restructured and renamed from the province of East Bengal and covering the territory of the modern country of Bangladesh. Its land borders were with India and Burma, wit ...

(today's

Bangladesh Bangladesh, officially the People's Republic of Bangladesh, is a country in South Asia. It is the List of countries and dependencies by population, eighth-most populous country in the world and among the List of countries and dependencies by ...

Union of Burma Union commonly refers to: * Trade union, an organization of workers * Union (set theory), in mathematics, a fundamental operation on sets Union may also refer to: Arts and entertainment Music * Union (band), an American rock group ** ''Unio ...

(today's

Myanmar Myanmar, officially the Republic of the Union of Myanmar; and also referred to as Burma (the official English name until 1989), is a country in northwest Southeast Asia. It is the largest country by area in Mainland Southeast Asia and has ...

), southwestern tip of Sainyabuli Province in

Laos Laos, officially the Lao People's Democratic Republic (LPDR), is the only landlocked country in Southeast Asia. It is bordered by Myanmar and China to the northwest, Vietnam to the east, Cambodia to the southeast, and Thailand to the west and ...

Cambodia Cambodia, officially the Kingdom of Cambodia, is a country in Southeast Asia on the Mainland Southeast Asia, Indochinese Peninsula. It is bordered by Thailand to the northwest, Laos to the north, and Vietnam to the east, and has a coastline ...

South Vietnam South Vietnam, officially the Republic of Vietnam (RVN; , VNCH), was a country in Southeast Asia that existed from 1955 to 1975. It first garnered Diplomatic recognition, international recognition in 1949 as the State of Vietnam within the ...

(now belonging to

Vietnam Vietnam, officially the Socialist Republic of Vietnam (SRV), is a country at the eastern edge of mainland Southeast Asia, with an area of about and a population of over 100 million, making it the world's List of countries and depende ...

Spratly Islands The Spratly Islands (; zh, s=南沙群岛, t=南沙群島, p=Nánshā Qúndǎo; ; ) are a disputed archipelago in the South China Sea. Composed of islands, islets, cays, and more than 100 reefs, sometimes grouped in submerged old atoll ...

Brunei Brunei, officially Brunei Darussalam, is a country in Southeast Asia, situated on the northern coast of the island of Borneo. Apart from its coastline on the South China Sea, it is completely surrounded by the Malaysian state of Sarawak, with ...

Malaysia Malaysia is a country in Southeast Asia. Featuring the Tanjung Piai, southernmost point of continental Eurasia, it is a federation, federal constitutional monarchy consisting of States and federal territories of Malaysia, 13 states and thre ...

Indonesia Indonesia, officially the Republic of Indonesia, is a country in Southeast Asia and Oceania, between the Indian Ocean, Indian and Pacific Ocean, Pacific oceans. Comprising over List of islands of Indonesia, 17,000 islands, including Sumatra, ...

, the Territory of Papua New Guinea (today's

Papua New Guinea Papua New Guinea, officially the Independent State of Papua New Guinea, is an island country in Oceania that comprises the eastern half of the island of New Guinea and offshore islands in Melanesia, a region of the southwestern Pacific Ocean n ...

), and

Gilbert and Ellice Islands The Gilbert and Ellice Islands (GEIC as a colony) in the Pacific Ocean was part of the British Empire from 1892 to 1976. It was a British protectorate, protectorate from 1892 to 12 January 1916, and then a crown colony, colony until 1 January 1 ...

(the part now belonging to

Kiribati Kiribati, officially the Republic of Kiribati, is an island country in the Micronesia subregion of Oceania in the central Pacific Ocean. Its permanent population is over 119,000 as of the 2020 census, and more than half live on Tarawa. The st ...

). 8 of the 14

eight-thousander The eight-thousanders are the 14 mountains recognized by the International Mountaineering and Climbing Federation (UIAA) as being more than in height above sea level, and sufficiently independent of neighbouring peaks. There is no precise defin ...

s—

Dhaulagiri Dhaulagiri, located in Nepal, is the seventh highest mountain in the world at above sea level, and the highest mountain within the borders of a single country. It was first climbed on 13 May 1960 by a Swiss-Austrian-Nepali expedition. Annapur ...

Annapurna Annapurna (; ) is a mountain situated in the Annapurna mountain range of Gandaki Province, north-central Nepal. It is the 10th highest mountain in the world at above sea level and is well known for the difficulty and danger involved in its as ...

Manaslu Manaslu (; , also known as Kutang) is the List of highest mountains#List, eighth-highest mountain in the world at above sea level. It is in the Mansiri Himal, part of the Nepalese Himalayas, in west-central Nepal. Manaslu means "mountain of the ...

Shishapangma Shishapangma, or Shishasbangma or Xixiabangma ( zh, s=希夏邦马, p=Xī xià bāng mǎ), is the 14th-highest mountain in the world, at above sea level. The lowest 8,000 metre peak, it is located entirely within Tibet. Name Geologist Toni H ...

Cho Oyu Cho Oyu ( Nepali: चोयु; ; ) is the sixth-highest mountain in the world at above sea level. Cho Oyu means " Turquoise Goddess" in Tibetan. The mountain is the westernmost major peak of the '' Khumbu'' sub-section of the Mahalangur Him ...

Everest Mount Everest (), known locally as Sagarmatha in Nepal and Qomolangma in Tibet, is Earth's highest mountain above sea level. It lies in the Mahalangur Himal sub-range of the Himalayas and marks part of the China–Nepal border at its ...

Lhotse Lhotse ( ; ; ) is the List of highest mountains#List, fourth-highest mountain on Earth, after Mount Everest, K2, and Kangchenjunga. At an elevation of above sea level, the main summit is on the border between Tibet Autonomous Region of Chin ...

and

Makalu Makalu (; ) is the fifth-highest mountain on Earth, with a summit at an elevation of AMSL. It is located in the Mahalangur Himalayas southeast of Mount Everest, on the China–Nepal border. One of the eight-thousanders, Makalu is an isolat ...

, as well as the highest peak of

Oceania Oceania ( , ) is a region, geographical region including Australasia, Melanesia, Micronesia, and Polynesia. Outside of the English-speaking world, Oceania is generally considered a continent, while Mainland Australia is regarded as its co ...

Puncak Jaya Puncak Jaya (; literally "Victorious Peak", Amungme: ''Nemangkawi Ninggok'') or Carstensz Pyramid (, , ) on the island of New Guinea, with an elevation of , is the highest mountain peak of an island on Earth, and the highest peak in Indones ...

, lie in the path of annularity. A partial eclipse was visible for most of

Asia Asia ( , ) is the largest continent in the world by both land area and population. It covers an area of more than 44 million square kilometres, about 30% of Earth's total land area and 8% of Earth's total surface area. The continent, which ...

Australia Australia, officially the Commonwealth of Australia, is a country comprising mainland Australia, the mainland of the Australia (continent), Australian continent, the island of Tasmania and list of islands of Australia, numerous smaller isl ...

, and

Observation

An observation team of the

Lockheed Corporation The Lockheed Corporation was an American aerospace manufacturer. Lockheed was founded in 1926 and merged in 1995 with Martin Marietta to form Lockheed Martin. Its founder, Allan Lockheed, had earlier founded the similarly named but otherwise-u ...

and the

United States Air Force The United States Air Force (USAF) is the Air force, air service branch of the United States Department of Defense. It is one of the six United States Armed Forces and one of the eight uniformed services of the United States. Tracing its ori ...

observed the annular eclipse near

Chiang Mai Chiang Mai, sometimes written as Chiengmai or Chiangmai, is the largest city in northern Thailand, the capital of Chiang Mai province and the List of municipalities in Thailand#Largest cities by urban population, second largest city in Thailan ...

Thailand Thailand, officially the Kingdom of Thailand and historically known as Siam (the official name until 1939), is a country in Southeast Asia on the Mainland Southeast Asia, Indochinese Peninsula. With a population of almost 66 million, it spa ...

's second largest city. They calculated the relationship between the

angular diameter The angular diameter, angular size, apparent diameter, or apparent size is an angular separation (in units of angle) describing how large a sphere or circle appears from a given point of view. In the vision sciences, it is called the ''visual an ...

s of the moon and the sun during annularity, and the

flattening Flattening is a measure of the compression of a circle or sphere along a diameter to form an ellipse or an ellipsoid of revolution (spheroid) respectively. Other terms used are ellipticity, or oblateness. The usual notation for flattening is f ...

of the moon based on the results.

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 ...

Related eclipses

Eclipses in 1965

* A total solar eclipse on May 30. * A partial lunar eclipse on June 14. * An annular solar eclipse on November 23. * A penumbral lunar eclipse on December 8.

Metonic

* Preceded by: Solar eclipse of February 5, 1962 * Followed by: Solar eclipse of September 11, 1969

Tzolkinex

* Preceded by:

Solar eclipse of October 12, 1958 A total solar eclipse occurred at the Moon's ascending node of orbit on Sunday, October 12, 1958, with a magnitude of 1.0608. A solar eclipse occurs when the Moon passes between Earth and the Sun, thereby totally or partly obscuring the image of t ...

* Followed by:

Solar eclipse of January 4, 1973 An annular solar eclipse occurred at the Moon's ascending node of orbit on Thursday, January 4, 1973, with a magnitude of 0.9303. A solar eclipse occurs when the Moon passes between Earth and the Sun, thereby totally or partly obscuring the image ...

Half-Saros

* Preceded by: Lunar eclipse of November 18, 1956 * Followed by: Lunar eclipse of November 29, 1974

Tritos

* Preceded by: Solar eclipse of December 25, 1954 * Followed by:

Solar eclipse of October 23, 1976 A total solar eclipse occurred at the Moon's Lunar node, ascending node of orbit on Saturday, October 23, 1976, with a Magnitude of eclipse, magnitude of 1.0572. A solar eclipse occurs when the Moon passes between Earth and the Sun, thereby totall ...

Solar Saros 132

* Preceded by: Solar eclipse of November 12, 1947 * Followed by: Solar eclipse of December 4, 1983

Inex

* Preceded by:

Solar eclipse of December 13, 1936 An annular solar eclipse occurred at the Moon's ascending node of orbit between Sunday, December 13 and Monday, December 14, 1936, with a magnitude of 0.9349. A solar eclipse occurs when the Moon passes between Earth and the Sun, thereby totally o ...

* Followed by: Solar eclipse of November 3, 1994

Triad

* Preceded by:

Solar eclipse of January 22, 1879 An annular solar eclipse occurred at the Moon's Lunar node, ascending node of orbit on Wednesday January 22, 1879, with a Magnitude of eclipse, magnitude of 0.9700. A solar eclipse occurs when the Moon passes between Earth and the Sun, thereby tot ...

* Followed by:

Solar eclipse of September 22, 2052 An annular solar eclipse will occur at the Moon's ascending node of orbit between Sunday, September 22 and Monday, September 23, 2052, with a magnitude of 0.9734. A solar eclipse occurs when the Moon passes between Earth and the Sun, thereby total ...

Solar eclipses of 1964–1967

Saros 132

Metonic series

Tritos series

Inex series

Notes

References

{{Solar eclipses 1965 11 23 1965 in science 1965 11 23 November 1965