Solar eclipse of June 21, 2020
Annularity as seen from Beigang, Yunlin, Taiwan
Map
Type of eclipse
NatureAnnular
Gamma0.1209
Magnitude0.994
Maximum eclipse
Duration38 sec (0 m 38 s)
Coordinates30°30′N 79°42′E / 30.5°N 79.7°E / 30.5; 79.7
Max. width of band21 km (13 mi)
Times (UTC)
Greatest eclipse6:41:15
References
Saros137 (36 of 70)
Catalog # (SE5000)9553

An annular solar eclipse occurred on Sunday, June 21, 2020.[1][2][3][4][5] An annular solar eclipse is a solar eclipse whose presentation looks like a ring, or annulus; it occurs when the Moon's apparent diameter is smaller than the Sun's, blocking most, but not all, of the Sun's light. In this instance, the Moon's apparent diameter was 0.6% smaller than the Sun's.[6]

The effect of the solar eclipse (Moon shadow) on Terra satellite image In this photo, the shadow of the Moon has fallen over Iran, Pakistan and Afghanistan. date: 2020-06-21

Path

The path of this annular eclipse passed through parts of Central and Eastern Africa; southern Arabian Peninsula, including Yemen, Oman, and southern Saudi Arabia; parts of South Asia and the Himalayas, including southern Pakistan, northern India, and Nepal; parts of East Asia, including South China and Taiwan, and part of Micronesia, including Guam.[7] A partial eclipse was visible throughout much of the rest of Africa, southeastern Europe, most of Asia, and in New Guinea and northern Australia just before sunset. In Europe, the partial eclipse was visible to places southeast of the line passing through parts of Italy, Hungary, Ukraine, and southwestern Russia.[7]

Animated path of the eclipse
Animation of images from Himawari 8 showing the Moon's shadow moving across the Earth.

Eclipses of 2020

Tzolkinex

Half-Saros cycle

Tritos

Solar Saros 137

Inex

Triad

Solar eclipses of 2018–2021

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.[8]

Note: Partial solar eclipses on February 15, 2018, and August 11, 2018, occurred during the previous semester series.

Solar eclipse series sets from 2018–2021
Ascending node   Descending node
Saros Map Gamma Saros Map Gamma
117

Partial from Melbourne, Australia		 2018 July 13

Partial		 −1.35423 122

Partial from Nakhodka, Russia		 2019 January 6

Partial		 1.14174
127

La Serena, Chile		 2019 July 2

Total		 −0.64656 132

Jaffna, Sri Lanka		 2019 December 26

Annular		 0.41351
137

Beigang, Yunlin, Taiwan		 2020 June 21

Annular		 0.12090 142

Gorbea, Chile		 2020 December 14

Total		 −0.29394
147

Partial from Halifax, Canada		 2021 June 10

Annular		 0.91516 152

From HMS Protector off South Georgia		 2021 December 4

Total		 −0.95261

Saros 137

It is a part of Saros cycle 137, an eclipse series repeating every 18 years and 11 days, containing 70 events. The series started with the partial solar eclipse on May 25, 1389. It contains total eclipses from August 20, 1533, through December 6, 1695, the first set of hybrid eclipses from December 17, 1713, through February 11, 1804, the first set of annular eclipses from February 21, 1822, through March 25, 1876, a second set of hybrid eclipses from April 6, 1894, through April 28, 1930, and the second set of annular eclipses from May 9, 1948, through April 13, 2507. The series ends at member 70 as a partial eclipse on June 28, 2633. All eclipses in this series occurs at the Moon’s ascending node.

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. In the 18th century:

  • Solar Saros 127: Total Solar Eclipse of 1731 Jan 08
  • Solar Saros 128: Annular Solar Eclipse of 1759 Dec 19
  • Solar Saros 129: Annular Solar Eclipse of 1788 Nov 27
Inex series members between 1801 and 2200:
Near lunar perigee After lunar apogee
Before lunar perigee		 Before lunar apogee
After lunar perigee

November 9, 1817
(Saros 130)
October 20, 1846
(Saros 131)
September 29, 1875
(Saros 132)

September 9, 1904
(Saros 133)
August 21, 1933
(Saros 134)
July 31, 1962
(Saros 135)

July 11, 1991
(Saros 136)
June 21, 2020
(Saros 137)
May 31, 2049
(Saros 138)

May 11, 2078
(Saros 139)
April 23, 2107
(Saros 140)
April 1, 2136
(Saros 141)

March 12, 2165
(Saros 142)
February 21, 2194
(Saros 143)

In the 23rd century:

  • Solar Saros 144: Annular Solar Eclipse of 2223 Feb 01
  • Solar Saros 145: Total Solar Eclipse of 2252 Jan 12
  • Solar Saros 146: Annular Solar Eclipse of 2280 Dec 22

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
107 109 111 113 115
June 21, 1963 April 9, 1967 January 26, 1971 November 14, 1974 September 2, 1978
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

References

  1. ↑ Rao, Joe (June 20, 2020). "'Ring of fire' solar eclipse 2020: Here's how it works (and what to expect)". Space.com.
  2. ↑ Elassar, Alaa (June 21, 2020). "Astronauts are spending Father's Day in space watching the solar eclipse". CNN.
  3. ↑ Taylor, Alan. "Photos: A Solstice 'Ring of Fire' Solar Eclipse - The Atlantic". www.theatlantic.com.
  4. ↑ "Cloudy skies block view of annular solar eclipse in Hyderabad". June 22, 2020 – via The Economic Times - The Times of India.
  5. ↑ "Annular solar eclipse prompts excitement across Taiwan". Taiwan News. June 21, 2020.
  6. ↑ "Annular solar eclipse of 2020 Jun 21". Retrieved 2021-06-22.
  7. 1 2 "Annular Solar Eclipse on June 21, 2020". www.timeanddate.com. Retrieved 2019-12-26.
  8. ↑ 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.
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