Solar eclipse of July 13, 2018 (original) (raw)

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21st-century partial solar eclipse

Solar eclipse of July 13, 2018

Partial eclipse
From Melbourne, Australia
Map
Gamma −1.3542
Magnitude 0.3365
Maximum eclipse
Coordinates 67°54′S 127°24′E / 67.9°S 127.4°E / -67.9; 127.4
Times (UTC)
Greatest eclipse 3:02:16
References
Saros 117 (69 of 71)
Catalog # (SE5000) 9548
← February 15, 2018August 11, 2018 →

A partial solar eclipse occurred at the Moon's ascending node of orbit on Friday, July 13, 2018,[1][2][3] with a magnitude of 0.3365. 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 partial solar eclipse occurs in the polar regions of the Earth when the center of the Moon's shadow misses the Earth.

The moon's penumbra touched a small part of Antarctica, and southern Australia in Tasmania, where the eclipse was observed with a magnitude of about 0.1. The eclipse was also visible in Stewart Island, an island south of New Zealand.[4]

Places experiencing partial eclipse

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Solar Eclipse of July 13, 2018(Local Times)

Country or territory City or place Start of partial eclipse Maximum eclipse End of partial eclipse Duration of eclipse (hr:min) Maximum coverage
Antarctica Casey Station 10:47:12 (sunrise) 10:59:17 11:34:42 0:48 18.61%
Australia Port Lincoln 12:26:06 12:35:02 12:43:58 0:18 0.06%
Antarctica Dumont d'Urville Station 12:22:36 13:10:33 13:58:14 1:36 21.58%
Australia Mount Gambier 12:20:41 12:44:14 13:07:36 0:47 1.15%
Australia Horsham 13:01:39 13:16:44 13:31:43 0:30 0.29%
Australia Warrnambool 12:53:21 13:17:12 13:40:48 0:47 1.21%
Australia Ararat 13:00:29 13🔞00 13:35:23 0:35 0.47%
Australia St Arnaud 13:07:01 13🔞35 13:30:05 0:23 0.13%
Australia Currie 12:51:27 13:19:26 13:47:02 0:56 2.05%
Australia Ballarat 13:02:13 13:19:38 13:36:53 0:35 0.46%
Australia Bendigo 13:10:40 13:20:22 13:30:01 0:19 0.08%
Australia Geelong 13:00:31 13:20:25 13:40:07 0:40 0.71%
Australia Kyneton 13:06:44 13:20:38 13:34:26 0:28 0.23%
Australia Melton 13:04:05 13:20:49 13:37:25 0:33 0.42%
Australia Melbourne 13:04:43 13:21:28 13:38:04 0:33 0.42%
Australia Frankston 13:03:17 13:21:42 13:39:57 0:37 0.56%
Australia Warragul 13:06:13 13:23:04 13:39:45 0:34 0.43%
Australia Traralgon 13:08:26 13:24:04 13:39:33 0:31 0.35%
Australia Hobart 12:52:04 13:24:31 13:56:21 1:04 3.52%
Australia Launceston 12:55:45 13:24:31 13:52:49 0:57 2.36%
Australia Bairnsdale 13:17:13 13:25:56 13:34:34 0:17 0.06%
Australia Macquarie Island 12:54:09 13:33:42 14:12:10 1:18 9.20%
New Zealand Oban 15:43:43 15:48:29 15:53:13 0:10 0.01%
References: [1]

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.[5]

July 13, 2018 Solar Eclipse Times

Event Time (UTC)
First Penumbral External Contact 2018 July 13 at 01:49:32.3 UTC
Ecliptic Conjunction 2018 July 13 at 02:49:01.2 UTC
Greatest Eclipse 2018 July 13 at 03:02:16.1 UTC
Equatorial Conjunction 2018 July 13 at 03:10:13.3 UTC
Last Penumbral External Contact 2018 July 13 at 04:14:55.9 UTC

July 13, 2018 Solar Eclipse Parameters

Parameter Value
Eclipse Magnitude 0.33654
Eclipse Obscuration 0.22578
Gamma −1.35423
Sun Right Ascension 07h29m31.1s
Sun Declination +21°50'30.6"
Sun Semi-Diameter 15'44.0"
Sun Equatorial Horizontal Parallax 08.7"
Moon Right Ascension 07h29m10.9s
Moon Declination +20°27'46.1"
Moon Semi-Diameter 16'42.8"
Moon Equatorial Horizontal Parallax 1°01'20.4"
ΔT 69.2 s

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 July–August 2018

July 13Ascending node (new moon) July 27Descending node (full moon) August 11Ascending node (new moon)
Partial solar eclipseSolar Saros 117 Total lunar eclipseLunar Saros 129 Partial solar eclipseSolar Saros 155

Solar eclipses of 2018–2021

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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.[6]

The partial solar eclipses on February 15, 2018 and August 11, 2018 occur in the previous lunar year eclipse set.

Solar eclipse series sets from 2018 to 2021
Ascending node Descending node
Saros Map Gamma Saros Map Gamma
117Partial in Melbourne, Australia July 13, 2018Partial −1.35423 122Partial in Nakhodka, Russia January 6, 2019Partial 1.14174
127Totality in La Serena, Chile July 2, 2019Total −0.64656 132 Annularity in Jaffna, Sri Lanka December 26, 2019Annular 0.41351
137Annularity in Beigang, Yunlin, Taiwan June 21, 2020Annular 0.12090 142Totality in Gorbea, Chile December 14, 2020Total −0.29394
147Partial in Halifax, Canada June 10, 2021Annular 0.91516 152From HMS Protector off South Georgia December 4, 2021Total −0.95261

This eclipse is a part of Saros series 117, repeating every 18 years, 11 days, and containing 71 events. The series started with a partial solar eclipse on June 24, 792 AD. It contains annular eclipses from September 18, 936 AD through May 14, 1333; hybrid eclipses from May 25, 1351 through July 8, 1423; and total eclipses from July 18, 1441 through May 19, 1928. The series ends at member 71 as a partial eclipse on August 3, 2054. 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 16 at 9 minutes, 26 seconds on December 3, 1062, and the longest duration of totality was produced by member 62 at 4 minutes, 19 seconds on April 26, 1892. All eclipses in this series occur at the Moon’s ascending node of orbit.[7]

Series members 57–71 occur between 1801 and 2054:
57 58 59
March 4, 1802 March 14, 1820 March 25, 1838
60 61 62
April 5, 1856 April 16, 1874 April 26, 1892
63 64 65
May 9, 1910 May 19, 1928 May 30, 1946
66 67 68
June 10, 1964 June 21, 1982 July 1, 2000
69 70 71
July 13, 2018 July 23, 2036 August 3, 2054

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 July 13, 2018 and July 12, 2094
July 12–13 April 30–May 1 February 16–17 December 5–6 September 22–23
117 119 121 123 125
July 13, 2018 April 30, 2022 February 17, 2026 December 5, 2029 September 23, 2033
127 129 131 133 135
July 13, 2037 April 30, 2041 February 16, 2045 December 5, 2048 September 22, 2052
137 139 141 143 145
July 12, 2056 April 30, 2060 February 17, 2064 December 6, 2067 September 23, 2071
147 149 151 153 155
July 13, 2075 May 1, 2079 February 16, 2083 December 6, 2086 September 23, 2090
157
July 12, 2094

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 2018 and 2200
July 13, 2018(Saros 117) June 12, 2029(Saros 118) May 11, 2040(Saros 119) April 11, 2051(Saros 120) March 11, 2062(Saros 121)
February 7, 2073(Saros 122) January 7, 2084(Saros 123) December 7, 2094(Saros 124) November 6, 2105(Saros 125) October 6, 2116(Saros 126)
September 6, 2127(Saros 127) August 5, 2138(Saros 128) July 5, 2149(Saros 129) June 4, 2160(Saros 130) May 5, 2171(Saros 131)
April 3, 2182(Saros 132) March 3, 2193(Saros 133)

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 1844 and 2200
November 10, 1844(Saros 111)
September 12, 1931(Saros 114)
July 13, 2018(Saros 117) June 23, 2047(Saros 118) June 1, 2076(Saros 119)
May 14, 2105(Saros 120) April 24, 2134(Saros 121) April 3, 2163(Saros 122)
March 13, 2192(Saros 123)
  1. ^ a b "July 13, 2018 Partial Solar Eclipse". timeanddate. Retrieved 12 August 2024.
  2. ^ "A Supermoon Partial Eclipse Is Happening Just in Time for Friday the 13th". Popular Mechanics. July 13, 2018.
  3. ^ Padgett, Lauren. "Friday the 13th solar eclipse only visible to rare few". The Atlanta Journal-Constitution – via AJC.com.
  4. ^ "Partial Solar Eclipse on July 13, 2018". www.timeanddate.com. Retrieved July 13, 2018.
  5. ^ "Partial Solar Eclipse of 2018 Jul 13". EclipseWise.com. Retrieved 12 August 2024.
  6. ^ 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.
  7. ^ "NASA - Catalog of Solar Eclipses of Saros 117". eclipse.gsfc.nasa.gov.