A total

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 between Saturday, March 8 and Sunday, March 9, 1997, 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 1.042. 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 total 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 larger than the Sun's, blocking all direct sunlight, turning day into darkness. Totality occurs in a narrow path across Earth's surface, with the partial solar eclipse visible over a surrounding region thousands of kilometres wide. Occurring about 18.5 hours 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 March 8, 1997, at 9:00 UTC), the Moon's apparent diameter was larger. Totality was visible in eastern

Russia Russia, or the Russian Federation, is a country spanning Eastern Europe and North Asia. It is the list of countries and dependencies by area, largest country in the world, and extends across Time in Russia, eleven time zones, sharing Borders ...

, northern

Mongolia Mongolia is a landlocked country in East Asia, bordered by Russia to the north and China to the south and southeast. It covers an area of , with a population of 3.5 million, making it the world's List of countries and dependencies by po ...

, the northern tip of

Xinjiang Xinjiang,; , SASM/GNC romanization, SASM/GNC: Chinese postal romanization, previously romanized as Sinkiang, officially the Xinjiang Uygur Autonomous Region (XUAR), is an Autonomous regions of China, autonomous region of the China, People' ...

and

Northeastern China Northeast China () is a geographical region of China, consisting officially of three provinces Liaoning, Jilin and Heilongjiang. The heartland of the region is the Northeast China Plain, the largest plain in China with an area of over . The regi ...

and the eastern tip of

Kazakhstan Kazakhstan, officially the Republic of Kazakhstan, is a landlocked country primarily in Central Asia, with a European Kazakhstan, small portion in Eastern Europe. It borders Russia to the Kazakhstan–Russia border, north and west, China to th ...

. A partial eclipse was visible for parts of

Southeast Asia Southeast Asia is the geographical United Nations geoscheme for Asia#South-eastern Asia, southeastern region of Asia, consisting of the regions that are situated south of China, east of the Indian subcontinent, and northwest of the Mainland Au ...

East Asia East Asia is a geocultural region of Asia. It includes China, Japan, Mongolia, North Korea, South Korea, and Taiwan, plus two special administrative regions of China, Hong Kong and Macau. The economies of Economy of China, China, Economy of Ja ...

Alaska Alaska ( ) is a non-contiguous U.S. state on the northwest extremity of North America. Part of the Western United States region, it is one of the two non-contiguous U.S. states, alongside Hawaii. Alaska is also considered to be the north ...

, and western

Canada Canada is a country in North America. Its Provinces and territories of Canada, ten provinces and three territories extend from the Atlantic Ocean to the Pacific Ocean and northward into the Arctic Ocean, making it the world's List of coun ...

Unusual gravity variations

This solar eclipse is somewhat special in the sense that some unexplained gravity anomalies of about 7

\times

10⁻⁸ m/s² during the solar eclipse were observed. Attempts (e.g., Van Flandern–Yang hypothesis) to explain these anomalies have not been able to reach a definite conclusion.

Observations

Russia

Russian Academy of Sciences The Russian Academy of Sciences (RAS; ''Rossíyskaya akadémiya naúk'') consists of the national academy of Russia; a network of scientific research institutes from across the Russian Federation; and additional scientific and social units such ...

sent an observation team near

Lake Baikal Lake Baikal is a rift lake and the deepest lake in the world. It is situated in southern Siberia, Russia between the Federal subjects of Russia, federal subjects of Irkutsk Oblast, Irkutsk Oblasts of Russia, Oblast to the northwest and the Repu ...

to study multiple aspects of the

solar corona In astronomy, a corona (: coronas or coronae) is the outermost layer of a star's Stellar atmosphere, atmosphere. It is a hot but relatively luminosity, dim region of Plasma (physics), plasma populated by intermittent coronal structures such as so ...

, providing complement to the imperfections of the corona observation of the

Solar and Heliospheric Observatory The Solar and Heliospheric Observatory (SOHO) is a European Space Agency (ESA) spacecraft built by a European industrial consortium led by Matra Marconi Space (now Airbus Defence and Space) that was launched on a Lockheed Martin Atlas IIAS la ...

spacecraft.

China

In China, only a partial eclipse was visible from most areas. The path of totality covered only two narrow areas not adjacent to each other. In

Northwestern China Northwestern China () is a region in the People's Republic of China. It consists of five provincial administrative regions, namely Shaanxi, Gansu, Qinghai, Ningxia, and Xinjiang. The region is characterized by a (semi-)arid continental climate. ...

, it covered the northern part of

Altay Prefecture Altay Prefecture is located in Northern Xinjiang, People's Republic of China. It has an area of and a population of 561,667 (2000). It is a part of the Ili Kazakh Autonomous Prefecture. As of the 2000 census, Altay was the only major subdivisi ...

. In

Northeast China Northeast China () is a geographical region of China, consisting officially of three provinces Liaoning, Jilin and Heilongjiang. The heartland of the region is the Northeast China Plain, the largest plain in China with an area of over . The regi ...

, it covered the northern part of

Hulunbuir Hulunbuir or Hulun Buir, ''Hūlúnbèi'ěr''; , ''Khulunbuir'' is a prefecture-level city in northeastern Inner Mongolia, China. Its administrative center is located at Hailar District, its largest urban area. Major scenic features are the high ...

League (now the city of Hulumbuir),

Inner Mongolia Inner Mongolia, officially the Inner Mongolia Autonomous Region, is an Autonomous regions of China, autonomous region of China. Its border includes two-thirds of the length of China's China–Mongolia border, border with the country of Mongolia. ...

and the northern part of neighbouring

Daxing'anling Prefecture Daxing'anling (), also known as Da Hinggan Ling, is the northernmost Chinese prefecture-level division, located in northwestern Heilongjiang Province. It covers and had a population of 520,000, as of 2004. It is named after the Greater Khinga ...

Heilongjiang Heilongjiang is a province in northeast China. It is the northernmost and easternmost province of the country and contains China's northernmost point (in Mohe City along the Amur) and easternmost point (at the confluence of the Amur and Us ...

. Therefore, observations of the total eclipse in China are concentrated in these two areas. In Altay Prefecture, Xinjiang, the total phase occurred right after sunrise. By observing the change in the brightness in Altay, the

Xia–Shang–Zhou Chronology Project The Xia–Shang–Zhou Chronology Project () was a multi-disciplinary project commissioned by the People's Republic of China in 1996 to determine with accuracy the location and time frame of the Xia, Shang, and Zhou dynasties. The project was d ...

concluded that the phrase of "day dawned twice in Zheng" in the ancient chronicle ''

Bamboo Annals The ''Bamboo Annals'' ( zh, t=竹書紀年, p=Zhúshū Jìnián), also known as the ''Ji Tomb Annals'' ( zh, t=汲冢紀年, p=Jí Zhǒng Jìnián), is a chronicle of ancient China. It begins in the earliest legendary time (the age of the Yellow E ...

'' referred to a solar eclipse on April 21, 899 BC which also occurred right after sunrise, thus determining the year of the

Battle of Muye The Battle of Muye, Mu, or Muh () was fought between forces of the ancient Chinese Shang dynasty led by King Zhou of Shang and the rebel state of Zhou led by King Wu. The Zhou defeated the Shang at Muye and captured the Shang capital Yin, ...

and the starting year of the

Zhou dynasty The Zhou dynasty ( ) was a royal dynasty of China that existed for 789 years from until 256 BC, the longest span of any dynasty in Chinese history. During the Western Zhou period (771 BC), the royal house, surnamed Ji, had military ...

. However, doubts also exist on this conclusion. For example, Douglas J. Keenan published on the journal '' East Asian History'', stating that calculations show that the eclipse in 899 BC reduced the brightness perceived subjectively by a human observer by less than 25%, and clouds can even cause the same effect very often, thus questioning the conclusion. Mohe County (now

Mohe City Mohe () is a county-level city in Daxing'anling Prefecture, Heilongjiang province. It is the northernmost city in China. As of the 2020 Chinese Census, it has a population of 54,036. Administrative divisions Mohe City is divided into 6 towns ...

), Heilongjiang, the northernmost county in China, was considered the best observation site in China due to the high

solar zenith angle The solar zenith angle is the zenith angle of the sun, i.e., the angle between the sun’s rays and the vertical direction. It is the complement to the solar altitude or solar elevation, which is the altitude angle or elevation angle between the ...

and the long duration of totality. Within the county, the longest duration occurred in Mohe Township (now Beiji Township), the northernmost township in China.

Comet Hale–Bopp Comet Hale–Bopp (formally designated C/1995 O1) is a long-period comet that was one of the most widely observed of the 20th century and one of the brightest seen for many decades. Alan Hale (astronomer), Alan Hale and Thomas Bopp disc ...

also appeared during totality, which also attracted many Chinese to travel to this northernmost town. In addition, the first amateur radio communication experiment during a total solar eclipse in mainland China, and

China Central Television China Central Television (CCTV) is the State media, national television broadcaster of China, established in 1958. CCTV is operated by the National Radio and Television Administration which reports directly to the Publicity Department of th ...

's first live broadcast of a solar eclipse were also completed there.

Images

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 1997

* A total solar eclipse on March 9. * A partial lunar eclipse on March 24. * A partial solar eclipse on September 2. * A total lunar eclipse on September 16.

Metonic

* Preceded by: Solar eclipse of May 21, 1993 * Followed by:

Solar eclipse of December 25, 2000 A partial solar eclipse occurred at the Moon’s descending node of orbit on Monday, December 25, 2000 (also known as the "Christmas 2000 Solar Eclipse"), with a magnitude of 0.7228. It was the first solar eclipse to fall on Christmas since 1954 ...

Tzolkinex

* Preceded by: Solar eclipse of January 26, 1990 * Followed by: Solar eclipse of April 19, 2004

Half-Saros

* Preceded by: Lunar eclipse of March 3, 1988 * Followed by: Lunar eclipse of March 14, 2006

Tritos

* Preceded by: Solar eclipse of April 9, 1986 * Followed by: Solar eclipse of February 7, 2008

Solar Saros 120

* Preceded by: Solar eclipse of February 26, 1979 * Followed by:

Solar eclipse of March 20, 2015 A total solar eclipse occurred at the Moon's descending node of orbit on Friday, March 20, 2015, with a magnitude of 1.0445. A solar eclipse occurs when the Moon passes between Earth and the Sun, thereby totally or partly obscuring the image of th ...

Inex

* Preceded by: Solar eclipse of March 28, 1968 * Followed by: Solar eclipse of February 17, 2026

Triad

* 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 January 7, 2084

Solar eclipses of 1997–2000

Saros 120

Metonic series

Tritos series

Inex series

References

External links

solar-eclipse.de: ''The total solar eclipse of 03/09/1997''
Photos:
In Russia
* http://www.izmiran.ru/info/personalia/molodensky/Eclips97.html

{{DEFAULTSORT:Solar Eclipse Of March 9, 1997 1997 03 09 1997 in science 1997 03 09 March 1997 1997 in Mongolia 1997 in Russia