Solar eclipse of August 17, 1803

Last updated
Solar eclipse of August 17, 1803
SE1803Aug17A.png
Map
Type of eclipse
NatureAnnular
Gamma −0.0048
Magnitude 0.9657
Maximum eclipse
Duration227 s (3 min 47 s)
Coordinates 13°36′N54°42′E / 13.6°N 54.7°E / 13.6; 54.7
Max. width of band124 km (77 mi)
Times (UTC)
Greatest eclipse8:25:03
References
Saros 132 (34 of 71)
Catalog # (SE5000) 9048

An annular solar eclipse occurred at the Moon's descending node of orbit on Wednesday, August 17, 1803, with a magnitude of 0.9657. 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. Occurring about 4.5 days before apogee (on August 21, 1803, at 19:20 UTC), the Moon's apparent diameter was smaller. [1]

Contents

The path of annularity was visible from parts of modern-day Western Sahara, Mauritania, far northern Mali, Algeria, Libya, Egypt, Saudi Arabia, and Yemen. A partial solar eclipse was also visible for parts of Europe, North Africa, Central Africa, the Middle East, South Asia, and Southeast Asia. [2] It was the first solar eclipse to be subject to detailed spectroscopic study. [3]

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. [4]

August 17, 1803 Solar Eclipse Times
EventTime (UTC)
First Penumbral External Contact1803 August 17 at 05:24:35.4 UTC
First Umbral External Contact1803 August 17 at 06:27:46.8 UTC
First Central Line1803 August 17 at 06:29:24.5 UTC
First Umbral Internal Contact1803 August 17 at 06:31:02.3 UTC
First Penumbral Internal Contact1803 August 17 at 07:34:15.4 UTC
Greatest Duration1803 August 17 at 07:56:21.3 UTC
Greatest Eclipse1803 August 17 at 08:25:03.0 UTC
Ecliptic Conjunction1803 August 17 at 08:25:06.3 UTC
Equatorial Conjunction1803 August 17 at 08:25:18.6 UTC
Last Penumbral Internal Contact1803 August 17 at 09:15:49.4 UTC
Last Umbral Internal Contact1803 August 17 at 10:19:01.8 UTC
Last Central Line1803 August 17 at 10:20:42.0 UTC
Last Umbral External Contact1803 August 17 at 10:22:22.3 UTC
Last Penumbral External Contact1803 August 17 at 11:25:36.2 UTC
August 17, 1803 Solar Eclipse Parameters
ParameterValue
Eclipse Magnitude0.96571
Eclipse Obscuration0.93259
Gamma−0.00483
Sun Right Ascension09h43m00.2s
Sun Declination+13°43'47.1"
Sun Semi-Diameter15'48.3"
Sun Equatorial Horizontal Parallax08.7"
Moon Right Ascension09h42m59.7s
Moon Declination+13°43'32.7"
Moon Semi-Diameter15'01.8"
Moon Equatorial Horizontal Parallax0°55'09.5"
ΔT12.4 s

Eclipse season

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. The first and last eclipse in this sequence is separated by one synodic month.

Eclipse season of August–September 1803
August 3
Ascending node (full moon)
 August 17
Descending node (new moon)
 September 1
Ascending node (full moon)
SE1803Aug17A.png
Penumbral lunar eclipse
Lunar Saros 106		 Annular solar eclipse
Solar Saros 132		 Penumbral lunar eclipse
Lunar Saros 144

Eclipses in 1803

Metonic

Tzolkinex

Half-Saros

Tritos

Solar Saros 132

Inex

Triad

Solar eclipses of 1801–1805

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. [5]

The partial solar eclipses on April 13, 1801 and October 7, 1801 occur in the previous lunar year eclipse set, and the solar eclipses on January 1, 1805 (partial); June 26, 1805 (partial); and December 21, 1805 (annular) occur in the next lunar year eclipse set.

Solar eclipse series sets from 1801 to 1805
Ascending node Descending node
SarosMapGammaSarosMapGamma
107March 14, 1801
SE1801Mar14P.png
Partial		−1.4434112 September 8, 1801
SE1801Sep08P.png
Partial		1.4657
117 March 4, 1802
SE1802Mar04T.png
Total		−0.6943122 August 28, 1802
SE1802Aug28A.png
Annular		0.7569
127 February 21, 1803
SE1803Feb21T.png
Total		−0.0075132 August 17, 1803
SE1803Aug17A.png
Annular		−0.0048
137February 11, 1804
SE1804Feb11H.png
Hybrid		0.7053142August 5, 1804
SE1804Aug05T.gif
Total		−0.7622
147January 30, 1805
SE1805Jan30P.gif
Partial		1.4651152July 26, 1805
SE1805Jul26Pb.gif
Partial		−1.4571

Saros 132

This eclipse is a part of Saros series 132, repeating every 18 years, 11 days, and containing 71 events. The series started with a partial solar eclipse on August 13, 1208. It contains annular eclipses from March 17, 1569 through March 12, 2146; hybrid eclipses on March 23, 2164 and April 3, 2182; and total eclipses from April 14, 2200 through June 19, 2308. The series ends at member 71 as a partial eclipse on September 25, 2470. 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 25 at 6 minutes, 56 seconds on May 9, 1641, and the longest duration of totality will be produced by member 61 at 2 minutes, 14 seconds on June 8, 2290. All eclipses in this series occur at the Moon’s descending node of orbit. [6]

Series members 34–56 occur between 1801 and 2200:
343536
SE1803Aug17A.png
August 17, 1803 		SE1821Aug27A.png
August 27, 1821		 SE1839Sep07A.png
September 7, 1839
373839
SE1857Sep18A.png
September 18, 1857		 SE1875Sep29A.png
September 29, 1875		 SE1893Oct09A.png
October 9, 1893
404142
SE1911Oct22A.png
October 22, 1911 		SE1929Nov01A.png
November 1, 1929 		SE1947Nov12A.png
November 12, 1947
434445
SE1965Nov23A.png
November 23, 1965 		SE1983Dec04A.png
December 4, 1983 		SE2001Dec14A.png
December 14, 2001
464748
SE2019Dec26A.png
December 26, 2019 		SE2038Jan05A.png
January 5, 2038 		SE2056Jan16A.png
January 16, 2056
495051
SE2074Jan27A.png
January 27, 2074 		SE2092Feb07A.png
February 7, 2092 		SE2110Feb18A.png
February 18, 2110
525354
SE2128Mar01A.png
March 1, 2128		 SE2146Mar12A.png
March 12, 2146		 SE2164Mar23H.png
March 23, 2164
5556
SE2182Apr03H.png
April 3, 2182		 SE2200Apr14T.png
April 14, 2200

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 descending node.

24 eclipse events between August 17, 1803 and August 16, 1841
August 16–17June 5–6March 24January 9–10October 29
132134136138140
SE1803Aug17A.png
August 17, 1803 		SE1807Jun06H.gif
June 6, 1807		 SE1811Mar24T.gif
March 24, 1811		 SE1815Jan10A.gif
January 10, 1815		 SE1818Oct29T.gif
October 29, 1818
142144146148150
SE1822Aug16T.gif
August 16, 1822		 SE1826Jun05P.gif
June 5, 1826		 SE1830Mar24P.gif
March 24, 1830		 SE1834Jan09P.gif
January 9, 1834		 SE1837Oct29P.gif
October 29, 1837
152
SE1841Aug16P.gif
August 16, 1841

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.

Series members between 1801 and 2087
SE1803Aug17A.png
August 17, 1803
(Saros 132)		 SE1814Jul17T.png
July 17, 1814
(Saros 133)		 SE1825Jun16H.png
June 16, 1825
(Saros 134)		 SE1836May15A.png
May 15, 1836
(Saros 135)		 SE1847Apr15T.png
April 15, 1847
(Saros 136)
SE1858Mar15A.png
March 15, 1858
(Saros 137)		 SE1869Feb11A.png
February 11, 1869
(Saros 138)		 SE1880Jan11T.png
January 11, 1880
(Saros 139)		 SE1890Dec12H.png
December 12, 1890
(Saros 140)		 SE1901Nov11A.png
November 11, 1901
(Saros 141)
SE1912Oct10T.png
October 10, 1912
(Saros 142)		 SE1923Sep10T.png
September 10, 1923
(Saros 143)		 SE1934Aug10A.png
August 10, 1934
(Saros 144)		 SE1945Jul09T.png
July 9, 1945
(Saros 145)		 SE1956Jun08T.png
June 8, 1956
(Saros 146)
SE1967May09P.png
May 9, 1967
(Saros 147)		 SE1978Apr07P.png
April 7, 1978
(Saros 148)		 SE1989Mar07P.png
March 7, 1989
(Saros 149)		 SE2000Feb05P.png
February 5, 2000
(Saros 150)		 SE2011Jan04P.png
January 4, 2011
(Saros 151)
SE2021Dec04T.png
December 4, 2021
(Saros 152)		 SE2032Nov03P.png
November 3, 2032
(Saros 153)		 SE2043Oct03A.png
October 3, 2043
(Saros 154)		 SE2054Sep02P.png
September 2, 2054
(Saros 155)		 SE2065Aug02P.png
August 2, 2065
(Saros 156)
SE2076Jul01P.png
July 1, 2076
(Saros 157)		 SE2087Jun01P.png
June 1, 2087
(Saros 158)

Inex series

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
SE1803Aug17A.png
August 17, 1803
(Saros 132)		 SE1832Jul27T.gif
July 27, 1832
(Saros 133)		 SE1861Jul08A.gif
July 8, 1861
(Saros 134)
SE1890Jun17A.gif
June 17, 1890
(Saros 135)		 SE1919May29T.png
May 29, 1919
(Saros 136)		 SE1948May09A.png
May 9, 1948
(Saros 137)
SE1977Apr18A.png
April 18, 1977
(Saros 138)		 SE2006Mar29T.png
March 29, 2006
(Saros 139)		 SE2035Mar09A.png
March 9, 2035
(Saros 140)
SE2064Feb17A.png
February 17, 2064
(Saros 141)		 SE2093Jan27T.png
January 27, 2093
(Saros 142)		 SE2122Jan08A.png
January 8, 2122
(Saros 143)
SE2150Dec19A.png
December 19, 2150
(Saros 144)		 SE2179Nov28T.png
November 28, 2179
(Saros 145)

See also

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<span class="mw-page-title-main">Solar eclipse of February 21, 1803</span> Total solar eclipse February 21, 1803

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References

  1. ↑ "Moon Distances for London, United Kingdom, England". timeanddate. Retrieved 23 September 2024.
  2. ↑ "Solar eclipse of August 17, 1803". NASA . Retrieved June 18, 2012.
  3. ↑ Orchiston, Wayne; Orchiston, Darunee Lingling (2017). "King Rama IV and French Observations of the 18 August 1868 Total Solar Eclipse from Wah-koa, Siam". The Emergence of Astrophysics in Asia, Historical & Cultural Astronomy. Springer International Publishing AG. p. 291. Bibcode:2017eaa..book..291O. doi:10.1007/978-3-319-62082-4_12. ISBN   978-3-319-62080-0.
  4. ↑ "Annular Solar Eclipse of 1803 Aug 17". EclipseWise.com. Retrieved 23 September 2024.
  5. ↑ 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.
  6. ↑ "NASA - Catalog of Solar Eclipses of Saros 132". eclipse.gsfc.nasa.gov.
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