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Solar eclipse of June 21, 2001

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Solar eclipse of June 21, 2001
Totality from Lusaka, Zambia by the Williams College eclipse expedition
Map
Type of eclipse
NatureTotal
Gamma−0.5701
Magnitude1.0495
Maximum eclipse
Duration297 s (4 min 57 s)
Coordinates11°18′S 2°42′E / 11.3°S 2.7°E / -11.3; 2.7
Max. width of band200 km (120 mi)
Times (UTC)
(P1) Partial begin9:33:04
(U1) Total begin10:35:59
Greatest eclipse12:04:46
(U4) Total end13:31:37
(P4) Partial end14:35:25
References
Saros127 (57 of 82)
Catalog # (SE5000)9511

A total solar eclipse took place on June 21, 2001, with a magnitude of 1.0495. It was the first solar eclipse of the 21st century. 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. A total solar eclipse occurs when the Moon's apparent diameter 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 2.2 days before perigee (June 23, 2001), the Moon's apparent diameter was larger.

Many people traveled to Africa to watch the eclipse;[1][2][3] the Daily Telegraph reported that "while some tribesmen watch a celestial crocodile eating the sun, the modern African will be counting the cash brought in by thousands of visitors".[4]

Visibility

It was visible from a narrow corridor in the southern Atlantic Ocean and southern Africa, including Angola, Zambia, Zimbabwe, Mozambique, the southern tip of Malawi, and Madagascar. A partial eclipse was seen from the much broader path of the Moon's penumbra, including eastern South America and most of Africa.

Observations

Within the path of totality, Angola got the best conditions with the highest solar zenith angle, longest duration and largest chance of clear weather. Sumbe, capital of Cuanza Sul Province, where the path first touched land, was the best in Angola with 4 minutes and 34 seconds of totality. However, the Angolan Civil War[5] prevented many from traveling to the county, and only about 500 people observed the eclipse there. Besides tourists, there were also scientists from the United States, France, Brazil, South Africa, the Czech Republic, Portugal and Hungary[6].

Zambia, though inferior to its neighbouring country Angola in the chance of clear weather, attracted many scientists and tourists due to its stable political situation and also the fact that its capital city Lusaka was also located within the path of totality[5]. The Zambian government made it a national holiday with one day off, and ZamPost also issues special postage stamps and first-day covers[7]. Scientists from the United States, the United Kingdom, Germany, Japan, South Korea and China observed it in Zambia[7]. The Chinese Academy of Sciences sent a team of 6 people, carrying 3 gravimeters, 2 nuclear gyromagnetometers, 4 digital acquisition systems and recording systems to study the gravity anomalies recorded by Indian scientists during the total solar eclipse of October 24, 1995 and by Chinese scientists during the total solar eclipse of March 9, 1997 in Mohe County[8][9]. With continuous observation for more than 10 years after that, China obtained the first observational evidence that the gravity field propagates at the speed of light[10].

Images

Eclipses of 2001

Tzolkinex

Half-Saros

Tritos

Solar Saros 127

Inex

Solar eclipses 2000–2003

This eclipse is a member of a semester series. An eclipse in a semester series of solar eclipses repeats approximately every 177 days and 4 hours (a semester) at alternating nodes of the Moon's orbit.[11]

The partial solar eclipses on February 5, 2000 and July 31, 2000 occur in the previous lunar year eclipse set.

Solar eclipse series sets from 2000 to 2003
Ascending node   Descending node
Saros Map Gamma Saros Map Gamma
117 July 1, 2000

Partial
−1.28214 122

Partial projection in Minneapolis, MN, USA
December 25, 2000

Partial
1.13669
127

Totality in Lusaka, Zambia
June 21, 2001

Total
−0.57013 132

Partial in Minneapolis, MN, USA
December 14, 2001

Annular
0.40885
137

Partial in Los Angeles, CA, USA
June 10, 2002

Annular
0.19933 142

Totality in Woomera, South Australia
December 4, 2002

Total
−0.30204
147

Annularity in Culloden, Scotland
May 31, 2003

Annular
0.99598 152
November 23, 2003

Total
−0.96381

Saros 127

This eclipse is a part of Saros series 127, repeating every 18 years, 11 days, and containing 82 events. The series started with a partial solar eclipse on October 10, 991 AD. It contains total eclipses from May 14, 1352 through August 15, 2091. There are no annular or hybrid eclipses in this set. The series ends at member 82 as a partial eclipse on March 21, 2452. Its eclipses are tabulated in three columns; every third eclipse in the same column is one exeligmos apart, so they all cast shadows over approximately the same parts of the Earth.

The longest duration of totality was produced by member 31 at 5 minutes, 40 seconds on August 30, 1532. All eclipses in this series occur at the Moon’s ascending node of orbit.[12]

Series members 46–68 occur between 1801 and 2200:
46 47 48

February 21, 1803

March 4, 1821

March 15, 1839
49 50 51

March 25, 1857

April 6, 1875

April 16, 1893
52 53 54

April 28, 1911

May 9, 1929

May 20, 1947
55 56 57

May 30, 1965

June 11, 1983

June 21, 2001
58 59 60

July 2, 2019

July 13, 2037

July 24, 2055
61 62 63

August 3, 2073

August 15, 2091

August 26, 2109
64 65 66

September 6, 2127

September 16, 2145

September 28, 2163
67 68

October 8, 2181

October 19, 2199

Tritos series

This eclipse is a part of a tritos cycle, repeating at alternating nodes every 135 synodic months (≈ 3986.63 days, or 11 years minus 1 month). Their appearance and longitude are irregular due to a lack of synchronization with the anomalistic month (period of perigee), but groupings of 3 tritos cycles (≈ 33 years minus 3 months) come close (≈ 434.044 anomalistic months), so eclipses are similar in these groupings.

Metonic series

The metonic series repeats eclipses every 19 years (6939.69 days), lasting about 5 cycles. Eclipses occur in nearly the same calendar date. In addition, the octon subseries repeats 1/5 of that or every 3.8 years (1387.94 days). All eclipses in this table occur at the Moon's ascending node.

21 eclipse events between June 21, 1982 and June 21, 2058
June 21 April 8–9 January 26 November 13–14 September 1–2
117 119 121 123 125

June 21, 1982

April 9, 1986

January 26, 1990

November 13, 1993

September 2, 1997
127 129 131 133 135

June 21, 2001

April 8, 2005

January 26, 2009

November 13, 2012

September 1, 2016
137 139 141 143 145

June 21, 2020

April 8, 2024

January 26, 2028

November 14, 2031

September 2, 2035
147 149 151 153 155

June 21, 2039

April 9, 2043

January 26, 2047

November 14, 2050

September 2, 2054
157

June 21, 2058

Notes

  1. ^ "Thousands gather in Zambia for total solar eclipse". The News and Advance. 2001-06-21. p. 5. Retrieved 2023-10-25 – via Newspapers.com.
  2. ^ "Solar eclipse: Day declared national holiday as thousands come to Zambia". Hickory Daily Record. 2001-06-22. p. 2. Retrieved 2023-10-25 – via Newspapers.com.
  3. ^ "First total eclipse of new millennium sweeps across Africa". Arizona Daily Sun. 2001-06-22. p. 7. Retrieved 2023-10-25 – via Newspapers.com.
  4. ^ "Tradition and tourism flourish in solar eclipse". The Daily Telegraph. 2001-06-21. p. 17. Retrieved 2023-10-25 – via Newspapers.com.
  5. ^ a b "2001年6月21日非洲日全食" (in Chinese). Beijing Planetarium. Archived from the original on 23 September 2015.
  6. ^ "各国科学家和游客云集安哥拉观看日全食". Xinhua News Agency (in Chinese). Sohu News. 21 June 2001. Archived from the original on 4 March 2016.
  7. ^ a b Zeng Wei (21 June 2001). "日全食搅热赞比亚". Beijing Youth Daily (in Chinese). People.cn. Archived from the original on 24 September 2015.
  8. ^ "宇宙起源理论可能改写 6科学家赴非观测日全食". Beijing Youth Daily (in Chinese). Sohu News. 15 June 2001. Archived from the original on 4 March 2016.
  9. ^ Chai Shikuan, Xiong Sihao (25 June 2001). "中科院日全食观测队获得高质量观测数据" (in Chinese). Xinhua News Agency. Archived from the original on 2003-11-03.
  10. ^ Sun Zifa (26 December 2012). "中国科学家全球首获引力场以光速传播的观测证据" (in Chinese). China News Service. Archived from the original on 24 September 2015.
  11. ^ van Gent, R.H. "Solar- and Lunar-Eclipse Predictions from Antiquity to the Present". A Catalogue of Eclipse Cycles. Utrecht University. Retrieved 6 October 2018.
  12. ^ "NASA - Catalog of Solar Eclipses of Saros 127". eclipse.gsfc.nasa.gov.

References

Photos: