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Solar eclipse of February 16, 1999

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Solar eclipse of February 16, 1999
Map
Type of eclipse
NatureAnnular
Gamma−0.4726
Magnitude0.9928
Maximum eclipse
Duration40 s (0 min 40 s)
Coordinates39°48′S 93°54′E / 39.8°S 93.9°E / -39.8; 93.9
Max. width of band29 km (18 mi)
Times (UTC)
Greatest eclipse6:34:38
References
Saros140 (28 of 71)
Catalog # (SE5000)9505

An annular solar eclipse occurred at the Moon’s descending node of orbit on Tuesday, February 16, 1999,[1] with a magnitude of 0.9928. 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 (ring). An annular eclipse appears as a partial eclipse over a region of the Earth thousands of kilometres wide. The Moon's apparent diameter was near the average diameter because it occurred 7.9 days after apogee (on February 8, 1999, at 8:50 UTC) and 4.3 days before perigee (on February 20, 1999, at 14:30 UTC).[2]

Annularity was visible in the southern Indian Ocean including the Prince Edward Islands, South Africa (the northern part of Marion Island and the whole Prince Edward Island), and Australia. A partial eclipse was visible for parts of Southern Africa, Antarctica, Australia, Indonesia, the Philippines, and western Oceania.

Images

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Eclipse details

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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.[3]

February 16, 1999 Solar Eclipse Times
Event Time (UTC)
First Penumbral External Contact 1999 February 16 at 03:53:02.3 UTC
First Umbral External Contact 1999 February 16 at 04:57:41.2 UTC
First Central Line 1999 February 16 at 04:58:28.2 UTC
Greatest Duration 1999 February 16 at 04:58:28.2 UTC
First Umbral Internal Contact 1999 February 16 at 04:59:15.2 UTC
Equatorial Conjunction 1999 February 16 at 06:21:25.3 UTC
Greatest Eclipse 1999 February 16 at 06:34:38.1 UTC
Ecliptic Conjunction 1999 February 16 at 06:39:45.2 UTC
Last Umbral Internal Contact 1999 February 16 at 08:10:12.8 UTC
Last Central Line 1999 February 16 at 08:10:56.9 UTC
Last Umbral External Contact 1999 February 16 at 08:11:40.9 UTC
Last Penumbral External Contact 1999 February 16 at 09:16:13.6 UTC
February 16, 1999 Solar Eclipse Parameters
Parameter Value
Eclipse Magnitude 0.99276
Eclipse Obscuration 0.98557
Gamma −0.47260
Sun Right Ascension 21h57m21.0s
Sun Declination -12°28'00.1"
Sun Semi-Diameter 16'11.4"
Sun Equatorial Horizontal Parallax 08.9"
Moon Right Ascension 21h57m48.9s
Moon Declination -12°54'33.4"
Moon Semi-Diameter 15'50.7"
Moon Equatorial Horizontal Parallax 0°58'09.2"
ΔT 63.5 s

Eclipse season

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This eclipse is part of an eclipse season, 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.

Eclipse season of January–February 1999
January 31
Ascending node (full moon)
February 16
Descending node (new moon)
Penumbral lunar eclipse
Lunar Saros 114
Annular solar eclipse
Solar Saros 140
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Eclipses in 1999

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Metonic

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Tzolkinex

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Half-Saros

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Tritos

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Solar Saros 140

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Inex

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Triad

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Solar eclipses of 1997–2000

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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.[4]

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 140

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This eclipse is a part of Saros series 140, repeating every 18 years, 11 days, and containing 71 events. The series started with a partial solar eclipse on April 16, 1512. It contains total eclipses from July 21, 1656 through November 9, 1836; hybrid eclipses from November 20, 1854 through December 23, 1908; and annular eclipses from January 3, 1927 through December 7, 2485. The series ends at member 71 as a partial eclipse on June 1, 2774. 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 11 at 4 minutes, 10 seconds on August 12, 1692, and the longest duration of annularity will be produced by member 53 at 7 minutes, 35 seconds on November 15, 2449. All eclipses in this series occur at the Moon’s descending node of orbit.[5]

Series members 18–39 occur between 1801 and 2200:
18 19 20

October 29, 1818

November 9, 1836

November 20, 1854
21 22 23

November 30, 1872

December 12, 1890

December 23, 1908
24 25 26

January 3, 1927

January 14, 1945

January 25, 1963
27 28 29

February 4, 1981

February 16, 1999

February 26, 2017
30 31 32

March 9, 2035

March 20, 2053

March 31, 2071
33 34 35

April 10, 2089

April 23, 2107

May 3, 2125
36 37 38

May 14, 2143

May 25, 2161

June 5, 2179
39

June 15, 2197

Metonic series

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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 descending node.

21 eclipse events between July 11, 1953 and July 11, 2029
July 10–11 April 29–30 February 15–16 December 4 September 21–23
116 118 120 122 124

July 11, 1953

April 30, 1957

February 15, 1961

December 4, 1964

September 22, 1968
126 128 130 132 134

July 10, 1972

April 29, 1976

February 16, 1980

December 4, 1983

September 23, 1987
136 138 140 142 144

July 11, 1991

April 29, 1995

February 16, 1999

December 4, 2002

September 22, 2006
146 148 150 152 154

July 11, 2010

April 29, 2014

February 15, 2018

December 4, 2021

September 21, 2025
156

July 11, 2029

Tritos series

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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.

Series members between 1801 and 2200

August 28, 1802
(Saros 122)

July 27, 1813
(Saros 123)

June 26, 1824
(Saros 124)

May 27, 1835
(Saros 125)

April 25, 1846
(Saros 126)

March 25, 1857
(Saros 127)

February 23, 1868
(Saros 128)

January 22, 1879
(Saros 129)

December 22, 1889
(Saros 130)

November 22, 1900
(Saros 131)

October 22, 1911
(Saros 132)

September 21, 1922
(Saros 133)

August 21, 1933
(Saros 134)

July 20, 1944
(Saros 135)

June 20, 1955
(Saros 136)

May 20, 1966
(Saros 137)

April 18, 1977
(Saros 138)

March 18, 1988
(Saros 139)

February 16, 1999
(Saros 140)

January 15, 2010
(Saros 141)

December 14, 2020
(Saros 142)

November 14, 2031
(Saros 143)

October 14, 2042
(Saros 144)

September 12, 2053
(Saros 145)

August 12, 2064
(Saros 146)

July 13, 2075
(Saros 147)

June 11, 2086
(Saros 148)

May 11, 2097
(Saros 149)

April 11, 2108
(Saros 150)

March 11, 2119
(Saros 151)

February 8, 2130
(Saros 152)

January 8, 2141
(Saros 153)

December 8, 2151
(Saros 154)

November 7, 2162
(Saros 155)

October 7, 2173
(Saros 156)

September 4, 2184
(Saros 157)

August 5, 2195
(Saros 158)

Inex series

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This eclipse is a part of the long period inex cycle, repeating at alternating nodes, every 358 synodic months (≈ 10,571.95 days, or 29 years minus 20 days). Their appearance and longitude are irregular due to a lack of synchronization with the anomalistic month (period of perigee). However, groupings of 3 inex cycles (≈ 87 years minus 2 months) comes close (≈ 1,151.02 anomalistic months), so eclipses are similar in these groupings.

Series members between 1801 and 2200

June 16, 1825
(Saros 134)

May 26, 1854
(Saros 135)

May 6, 1883
(Saros 136)

April 17, 1912
(Saros 137)

March 27, 1941
(Saros 138)

March 7, 1970
(Saros 139)

February 16, 1999
(Saros 140)

January 26, 2028
(Saros 141)

January 5, 2057
(Saros 142)

December 16, 2085
(Saros 143)

November 27, 2114
(Saros 144)

November 7, 2143
(Saros 145)

October 17, 2172
(Saros 146)

Notes

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  1. ^ "February 16, 1999 Annular Solar Eclipse". timeanddate. Retrieved 10 August 2024.
  2. ^ "Moon Distances for London, United Kingdom, England". timeanddate. Retrieved 10 August 2024.
  3. ^ "Annular Solar Eclipse of 1999 Feb 16". EclipseWise.com. Retrieved 10 August 2024.
  4. ^ 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.
  5. ^ "NASA - Catalog of Solar Eclipses of Saros 140". eclipse.gsfc.nasa.gov.

References

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