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

occurred on December 14, 1955. A solar eclipse occurs when the Moon passes between Earth and the Sun, 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 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 com ...

(ring). An annular eclipse appears as a partial eclipse over a region of the Earth thousands of kilometres wide. Annularity was visible from French Equatorial Africa (the part now belonging to

Chad Chad (; ar, تشاد , ; french: Tchad, ), officially the Republic of Chad, '; ) is a landlocked country at the crossroads of North and Central Africa. It is bordered by Libya to the north, Sudan to the east, the Central African Republic ...

), Libya, Anglo-Egyptian Sudan (the part now belonging to

Sudan Sudan ( or ; ar, السودان, as-Sūdān, officially the Republic of the Sudan ( ar, جمهورية السودان, link=no, Jumhūriyyat as-Sūdān), is a country in Northeast Africa. It shares borders with the Central African Republic t ...

) including the capital city Khartoum,

French Somaliland French Somaliland (french: Côte française des Somalis, lit= French Coast of the Somalis so, Xeebta Soomaaliyeed ee Faransiiska) was a French colony in the Horn of Africa. It existed between 1884 and 1967, at which time it became the French Ter ...

(today's Djibouti) including the capital Djibouti City,

British Somaliland British Somaliland, officially the Somaliland Protectorate ( so, Dhulka Maxmiyada Soomaalida ee Biritishka), was a British Empire, British protectorate in present-day Somaliland. During its existence, the territory was bordered by Italian Soma ...

(today's

Somaliland Somaliland,; ar, صوماليلاند ', ' officially the Republic of Somaliland,, ar, جمهورية صوماليلاند, link=no ''Jumhūrīyat Ṣūmālīlānd'' is a ''de facto'' sovereign state in the Horn of Africa, still conside ...

) including the capital city Hargeisa, the Trust Territory of Somaliland (today's Somalia), the Maldives, Andaman and Nicobar Islands, Burma, Thailand including the capital city Bangkok, Cambodia,

Laos Laos (, ''Lāo'' )), officially the Lao People's Democratic Republic ( Lao: ສາທາລະນະລັດ ປະຊາທິປະໄຕ ປະຊາຊົນລາວ, French: République démocratique populaire lao), is a socialist ...

, North Vietnam and

South Vietnam South Vietnam, officially the Republic of Vietnam ( vi, Việt Nam Cộng hòa), was a state in Southeast Asia that existed from 1955 to 1975, the period when the southern portion of Vietnam was a member of the Western Bloc during part of th ...

(now belonging to Vietnam),

China China, officially the People's Republic of China (PRC), is a country in East Asia. It is the world's most populous country, with a population exceeding 1.4 billion, slightly ahead of India. China spans the equivalent of five time zones and ...

British Hong Kong Hong Kong was a colony and later a dependent territory of the British Empire from 1841 to 1997, apart from a period of occupation under the Japanese Empire from 1941 to 1945 during the Pacific War. The colonial period began with the Briti ...

, Taiwan, and Ryukyu Islands. It was the third central solar eclipse visible from Bangkok from

1948 Events January * January 1 ** The General Agreement on Tariffs and Trade (GATT) is inaugurated. ** The Constitution of New Jersey (later subject to amendment) goes into effect. ** The railways of Britain are nationalized, to form British ...

1958 Events January * January 1 – The European Economic Community (EEC) comes into being. * January 3 – The West Indies Federation is formed. * January 4 ** Edmund Hillary's Commonwealth Trans-Antarctic Expedition completes the third ...

, where it is rare for a large city to witness four central solar eclipses in just 9.945 years. This was the 20th member Solar Saros 141, and the last of first set of solar eclipses without a penumbral internal contact (without a penumbra northern limit), the next event is the 1973 Dec 24 event, which is the first of 19 solar eclipses with a penumbral internal contact (has penumbral northern and southern limits) until 2298 Jul 09. Occurring only one day before apogee (December 15, 1955), the Moon's apparent diameter was smaller. The duration of annularity at maximum eclipse (closest to but slightly shorter than the longest duration) was 12 minutes, 9.17 seconds in the Indian Ocean. It was the longest annular solar eclipse from December 17, 168 to January 14, 3080. Among all the 23740 solar eclipses from 4000 BC to 6000 AD, 7881 are annular, and only 3 of them are longer than this one.

More details

Eclipse Magnitude: 0.91764 Eclipse Obscuration: 0.84206 Gamma: 0.42658 Saros Series: 141st (20 of 70) Greatest Eclipse: 14 Dec 1955 07:01:53.7 UTC (07:02:25.1 TD) Ecliptic Conjunction: 14 Dec 1955 07:07:02.4 UTC (07:07:33.8 TD) Equatorial Conjunction: 14 Dec 1955 07:03:46.6 UTC (07:04:18.1 TD) Sun right ascension: 17.38 Moon right ascension: 17.38 Earth's shadow right ascension: 5.38 Sun declination: -23.2 Moon declination: -22.8 Earth's shadow declination: 23.2 Sun diameter: 1949.8 arcseconds Moon diameter: 1765.0 arcseconds Path Width at Greatest Eclipse: 345.7 km (214.8 mi) Path Width at Greatest Duration: 345.8 km (214.9 mi) Central Duration at Greatest Eclipse: 12 minutes, 9.17 seconds Central Duration at Greatest Duration: 12 minutes, 9.23 seconds

Extreme duration

With a maximum length of annularity duration of 12 minutes and 9.17 seconds, this is the longest solar eclipse in the millennium, as well as the longest duration in Saros 141 and one of the longest eclipses ever observed. The annular path begins in northern Africa, then passing Maldives (near the maximum eclipse), then crosses just southern edge of

Sri Lanka Sri Lanka (, ; si, ශ්‍රී ලංකා, Śrī Laṅkā, translit-std=ISO (); ta, இலங்கை, Ilaṅkai, translit-std=ISO ()), formerly known as Ceylon and officially the Democratic Socialist Republic of Sri Lanka, is an ...

, then the track continues to some countries in Indochina and the track ends just slightly after the track passes Taiwan.

Related eclipses

Solar eclipses of 1953–1956

Saros 141

Inex series

Metonic series

Notes

References

{{Solar eclipses 1955 12 14 1955 in science 1955 12 14 December 1955 events