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Earth's surface, with the partial solar eclipse visible over a surrounding region thousands of kilometres wide.
{{Infobox solar eclipse|1999Aug11}}
A total [[solar eclipse]] occurred on 11 August 1999 with an [[magnitude of eclipse|eclipse magnitude]] of 1.029. 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.
The path of the [[Moon]]'s shadow began in the [[Atlantic Ocean]] and, before noon, was traversing the southern [[United Kingdom]], northern [[France]], [[Belgium]], [[Luxembourg]], southern [[Germany]], [[Austria]], [[Slovenia]], [[Croatia]], [[Hungary]], and northern [[FR Yugoslavia]] ([[Vojvodina]]). Its maximum was at 11:03 UTC at {{coord|45.1|N|24.3|E|}} in [[Romania]] (next to a town called [[Ocnele Mari]] near [[Râmnicu Vâlcea]]); and it continued across [[Bulgaria]], the [[Black Sea]], [[Turkey]], [[Iran]], southern [[Pakistan]] and [[Srikakulam]] in [[India]] and ended in the [[Bay of Bengal]].
The path of the [[Moon]]'s shadow began in the [[Atlantic Ocean]] and, before noon, was traversing the southern [[United Kingdom]], northern [[France]], [[Belgium]], [[Luxembourg]], southern [[Germany]], [[Austria]], [[Slovenia]], [[Croatia]], [[Hungary]], and northern [[FR Yugoslavia]] ([[Vojvodina]]). Its maximum was at 11:03 UTC at {{coord|45.1|N|24.3|E|}} in [[Romania]] (next to a town called [[Ocnele Mari]] near [[Râmnicu Vâlcea]]); and it continued across [[Bulgaria]], the [[Black Sea]], [[Turkey]], [[Iran]], southern [[Pakistan]] and [[Srikakulam]] in [[India]] and ended in the [[Bay of Bengal]].


Revision as of 22:18, 21 August 2017

  Earth's surface, with the partial solar eclipse visible over a surrounding region thousands of kilometres wide.

The path of the Moon's shadow began in the Atlantic Ocean and, before noon, was traversing the southern United Kingdom, northern France, Belgium, Luxembourg, southern Germany, Austria, Slovenia, Croatia, Hungary, and northern FR Yugoslavia (Vojvodina). Its maximum was at 11:03 UTC at 45°06′N 24°18′E / 45.1°N 24.3°E / 45.1; 24.3 in Romania (next to a town called Ocnele Mari near Râmnicu Vâlcea); and it continued across Bulgaria, the Black Sea, Turkey, Iran, southern Pakistan and Srikakulam in India and ended in the Bay of Bengal.

It was the first total eclipse visible from Europe since 22 July 1990, and the first visible in the United Kingdom since 29 June 1927.

Observations

The eclipse as seen from France

Because of the high population densities in areas of the path, this was one of the most-viewed total solar eclipses in human history;[1] although some areas in the path of totality (mainly in Western Europe) offered impaired visibility due to adverse weather conditions.

Some of the organized eclipse-watching parties along the path of totality set up video projectors on which people could watch the shadow as it raced towards them.[2] There was substantial coverage on International TV stations of the progress of the eclipse shadow. The Moon's shadow was also observed from the Russian Mir space station; during the eclipse, video from Mir was broadcast live on television.

  • The BBC concentrated its coverage efforts on the first landfall of the shadow across the western end of Cornwall (from St Ives to Lizard), which was packed with an extraordinary number of visitors, although Cornwall did not have nearly as many as expected leading to many specially organised events to be left with very small attendance. The veteran eclipse-watcher Patrick Moore was brought in to head a live programme, but the eclipse was clouded out. BBC One also produced a special version of their Balloon Idents for the event. The BBC did not have a presence at Goonhilly on the Lizard Peninsula, one of the few places in Cornwall where the clouds parted just in time for the total eclipse to be visible.
  • Some of the best viewing conditions were to be had mid-Channel, where ferries were halted in calm conditions to obtain an excellent view. Hundreds of people who gathered on the island of Alderney also experienced the event.
  • A gathering of several thousand people at the airport in Soissons, France, which was on the path of totality, were denied all but a few fleeting glimpses of the eclipse through the overcast sky. The clouds cleared completely just a few minutes after the eclipse.
  • In contrast, the overcast sky in Amiens, France, where thousands had gathered, cleared only minutes before the eclipse began.
  • Further inland, viewing conditions were also perfect at Vouziers, a French country town gridlocked by Belgian cars from day-visitors. The patchy cloud covering cleared a short time before the shadow arrived. Some photos from Vouziers were used on the subsequent BBC Sky at Night programme.
  • The San Francisco Exploratorium featured a live webcast from a crowded town square in Amasya, Turkey.
  • Doordarshan, the national TV channel in India broadcast a live coverage from Srikakulam, hosted by the renowned TV personality, Mona Bhattacharya.
  • A Bulgarian Air Force MiG-21 two-seater was used by the Bulgarian Academy of Sciences to study the solar corona. The MiG-21, flying at 1600–1700 km/h (M=1,4-1,5) at an altitude of 13,000 m, was able to stay in the moon's umbra for 6 min. The photographer, an air force pilot, used two film cameras, both fitted with 200 mm lenses and infrared filters, and one Digital8 video camera.
  • Hungary's most popular tourist destination, Lake Balaton and its surrounding area fell into the path of the eclipse entirely, which made the area even more popular for that day. The motorway leading there was crowded, many people had to watch the eclipse while caught in a traffic jam.
  • One French and two British Concordes briefly followed the eclipse with tourists on board[3]
  • The BBC was filming one of its episodes for its TV series Airport that day, and during the show, photographers Russell Clisby and Steve Meller took photographs of the eclipse at Heathrow Airport, as well as Aeroflot supervisor Jeremy Spake witnessing the eclipse on a special charter flight.
  • RTS, the national public broadcaster of Serbia, urged people to remain inside, citing dangers to public health. This caused the streets of all Serbian cities, towns and villages to be entirely deserted during the eclipse, with many opting to watch it on TV instead. [4]

Notable times and coordinates

Animated path
Special 2,000 lei note made for the 1999 total eclipse of the Sun, showing the eclipse path over the map of Romania
Event Time (UTC) Coordinates[5]
1st penumbral contact with earth surface (P1) 08:26:17
1st external umbral contact (U1) 09:29:55 41°2.0′N 65°5.4′W / 41.0333°N 65.0900°W / 41.0333; -65.0900
2nd internal umbral contact (U2) 09:30:53 43°0.1′N 57°55.8′W / 43.0017°N 57.9300°W / 43.0017; -57.9300
Greatest eclipse 11:03:07 45°4.8′N 24°17.3′E / 45.0800°N 24.2883°E / 45.0800; 24.2883[6]
3rd internal umbral contact (U3) 12:35:33 19°39.7′N 80°20.4′E / 19.6617°N 80.3400°E / 19.6617; 80.3400
4th external umbral contact (U4) 12:36:26 17°33.5′N 87°17.1′E / 17.5583°N 87.2850°E / 17.5583; 87.2850
4th penumbral contact with earth surface (P4) 13:40:08

Type of the eclipse

Nature of the eclipse Total
Gamma 0.5063
Magnitude 1.0286
Duration at greatest eclipse point 143 s (2 min 23 s) at 11:03:07 UTC, in Romania: 45°04′48″N 24°17′18″E / 45.08000°N 24.28833°E / 45.08000; 24.28833
Maximum pathwidth 112.3 km

Solar eclipses 1997–2000

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.[7]

The partial solar eclipses on July 1, 2000 and December 25, 2000 occur in the next lunar year eclipse set.

Solar eclipse series sets from 1997 to 2000
Descending node   Ascending node
Saros Map Gamma Saros Map Gamma
120

Totality in Chita, Russia 		March 9, 1997

Total 		0.9183 125 September 2, 1997

Partial 		−1.0352
130

Totality near Guadeloupe 		February 26, 1998

Total 		0.2391 135 August 22, 1998

Annular 		−0.2644
140 February 16, 1999

Annular 		−0.4726 145

Totality in France 		August 11, 1999

Total 		0.5062
150 February 5, 2000

Partial 		−1.2233 155 July 31, 2000

Partial 		1.2166

Saros 145

This eclipse is a part of Saros series 145, repeating every 18 years, 11 days, and containing 77 events. The series started with a partial solar eclipse on January 4, 1639. It contains an annular eclipse on June 6, 1891; a hybrid eclipse on June 17, 1909; and total eclipses from June 29, 1927 through September 9, 2648. The series ends at member 77 as a partial eclipse on April 17, 3009. 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 annularity was produced by member 15 at 6 seconds (by default) on June 6, 1891, and the longest duration of totality will be produced by member 50 at 7 minutes, 12 seconds on June 25, 2522. All eclipses in this series occur at the Moon’s ascending node of orbit.[8]

Series members 10–32 occur between 1801 and 2200:
10 11 12

April 13, 1801
April 24, 1819
May 4, 1837
13 14 15

May 16, 1855
May 26, 1873
June 6, 1891
16 17 18

June 17, 1909
June 29, 1927
July 9, 1945
19 20 21

July 20, 1963
July 31, 1981
August 11, 1999
22 23 24

August 21, 2017
September 2, 2035
September 12, 2053
25 26 27

September 23, 2071
October 4, 2089
October 16, 2107
28 29 30

October 26, 2125
November 7, 2143
November 17, 2161
31 32

November 28, 2179
December 9, 2197

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.

22 eclipse events between January 5, 1935 and August 11, 2018
January 4–5 October 23–24 August 10–12 May 30–31 March 18–19
111 113 115 117 119

January 5, 1935
August 12, 1942
May 30, 1946
March 18, 1950
121 123 125 127 129

January 5, 1954
October 23, 1957
August 11, 1961
May 30, 1965
March 18, 1969
131 133 135 137 139

January 4, 1973
October 23, 1976
August 10, 1980
May 30, 1984
March 18, 1988
141 143 145 147 149

January 4, 1992
October 24, 1995
August 11, 1999
May 31, 2003
March 19, 2007
151 153 155

January 4, 2011
October 23, 2014
August 11, 2018

See also

Notes

  1. ^ "Solar show in sky or on the Internet".
  2. ^ "ISMB 99". Bioinf.mpi-sb.mpg.de. Retrieved 2013-10-01.
  3. ^ Hatherill, Chris (9 March 2016). "When Astronomers Chased a Total Eclipse in a Concorde". Vice (magazine). Retrieved 10 March 2016.
  4. ^ "Atmosfear: Slobodan Milošević versus 1999 Solar Eclipse". Centre for the History of Science, Technology of Medicine. July 2010.
  5. ^ "Eclipse2017 - Total Solar Eclipse 2017". eclipse.gsfc.nasa.gov.
  6. ^ "Eclipse2017 - Total Solar Eclipse 2017". eclipse.gsfc.nasa.gov.
  7. ^ 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.
  8. ^ "NASA - Catalog of Solar Eclipses of Saros 145". eclipse.gsfc.nasa.gov.

References

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