Solar Eclipse Prime Page

Annular Solar Eclipse of 2020 Jun 21

Fred Espenak

Introduction


The Annular Solar Eclipse of 2020 Jun 21 is visible from the following geographic regions:

  • Partial Eclipse: Africa, southeast Europe, Asia
  • Annular Eclipse: central Africa, south Asia, China, Pacific

The map to the right depicts the geographic regions of eclipse visibility. Click on the map to enlarge it. For an explanation of the features appearing in the map, see Key to Solar Eclipse Maps.

The instant of greatest eclipse takes place on 2020 Jun 21 at 06:41:15 TD (06:40:06 UT1). This is 6.2 days after the Moon reaches apogee. During the eclipse, the Sun is in the constellation Taurus. The synodic month in which the eclipse takes place has a Brown Lunation Number of 1206.

The eclipse belongs to Saros 137 and is number 36 of 70 eclipses in the series. All eclipses in this series occur at the Moon’s ascending node. The Moon moves southward with respect to the node with each succeeding eclipse in the series and gamma decreases.

The annular solar eclipse of 2020 Jun 21 is preceded two weeks earlier by a penumbral lunar eclipse on 2020 Jun 05, and it is followed two weeks later by a penumbral lunar eclipse on 2020 Jul 05.

These eclipses all take place during a single eclipse season.

The eclipse predictions are given in both Terrestrial Dynamical Time (TD) and Universal Time (UT1). The parameter ΔT is used to convert between these two times (i.e., UT1 = TD - ΔT). ΔT has a value of 69.7 seconds for this eclipse.

The following links provide maps and data for the eclipse.

The tables below contain detailed predictions and additional information on the Annular Solar Eclipse of 2020 Jun 21 .


Eclipse Data: Annular Solar Eclipse of 2020 Jun 21

Eclipse Characteristics
Parameter Value
Eclipse Magnitude 0.99401
Eclipse Obscuration 0.98806
Gamma 0.12090
Conjunction Times
Event Calendar Date & Time Julian Date
Greatest Eclipse 2020 Jun 21 at 06:41:15.4 TD (06:40:05.7 UT1) 2459021.777844
Ecliptic Conjunction 2020 Jun 21 at 06:42:36.6 TD (06:41:27.0 UT1) 2459021.778784
Equatorial Conjunction 2020 Jun 21 at 06:42:34.5 TD (06:41:24.8 UT1) 2459021.778759
Geocentric Coordinates of Sun and Moon
2020 Jun 21 at 06:41:15.4 TD (06:40:05.7 UT1)
Coordinate Sun Moon
Right Ascension06h01m33.0s06h01m30.2s
Declination+23°26'09.7"+23°32'56.7"
Semi-Diameter 15'44.2" 15'24.0"
Eq. Hor. Parallax 08.7" 0°56'31.1"
Geocentric Libration of Moon
Angle Value
l -5.0°
b -0.1°
c 1.7°
Prediction Paramaters
Paramater Value
Ephemerides JPL DE406
ΔT 69.7 s
k (penumbra) 0.2725076
k (umbra) 0.2722810
Saros Series 137 (36/70)

Explanation of Solar Eclipse Data Tables

Penumbral Shadow Contacts and Extremes: Annular Solar Eclipse of 2020 Jun 21

Contacts of Penumbral Shadow with Earth
Contact Event Contact Time
TD
Time
UT1
Latitude Longitude
First External ContactP103:47:09.903:46:00.301°02.1'S034°24.6'E
First Internal ContactP205:52:48.705:51:39.009°20.0'N001°32.0'W
Last Internal ContactP307:29:41.207:28:31.619°28.7'N167°09.2'E
Last External ContactP409:35:13.909:34:04.209°10.6'N130°57.9'E
Extreme Northern and Southern Path Limits of Penumbra
Contact Event Contact Time
TD
Time
UT1
Latitude Longitude
North Extreme Path Limit 1N105:25:38.405:24:28.833°11.9'N007°08.1'W
South Extreme Path Limit 1S104:47:26.504:46:16.827°53.5'S032°09.4'E
North Extreme Path Limit 2N207:56:47.307:55:37.742°45.2'N175°11.1'E
South Extreme Path Limit 2S208:35:06.508:33:56.817°50.3'S133°57.7'E

Explanation of Penumbral Shadow Contacts and Extremes Tables

Umbral Shadow Contacts and Extremes: Annular Solar Eclipse of 2020 Jun 21

Contacts of Umbral Shadow with Earth
Contact Event Contact Time
TD
Time
UT1
Latitude Longitude
First External ContactU104:48:54.204:47:44.501°13.7'N017°59.7'E
First Internal ContactU204:50:20.704:49:11.001°18.6'N017°36.0'E
Last Internal ContactU308:32:11.308:31:01.711°30.5'N147°46.4'E
Last External ContactU408:33:32.008:32:22.411°25.9'N147°24.1'E
Extreme Northern and Southern Path Limits of Umbra
Contact Event Contact Time
TD
Time
UT1
Latitude Longitude
North Extreme Path Limit 1N104:49:50.604:48:40.901°36.1'N017°35.9'E
South Extreme Path Limit 1S104:49:24.304:48:14.600°56.1'N017°59.8'E
North Extreme Path Limit 2N208:32:39.408:31:29.711°46.8'N147°46.8'E
South Extreme Path Limit 2S208:33:04.008:31:54.311°09.7'N147°23.8'E

Explanation of Umbral Shadow Contacts and Extremes Tables

Central Line Extremes and Duration: Annular Solar Eclipse of 2020 Jun 21

Extreme Limits of the Central Line
Contact Event Contact Time
TD
Time
UT1
Latitude Longitude
Extreme Central Line Limit 1C104:49:37.404:48:27.701°16.1'N017°47.9'E
Extreme Central Line Limit 2C208:32:51.708:31:42.011°28.2'N147°35.3'E

Explanation of Central Line Extremes Table

Greatest Eclipse and Greatest Duration
Event Time
TD
Time
UT1
Latitude Longitude Sun
Altitude
Sun
Azimuth
Path Width Central
Duration
Greatest Eclipse06:41:15.406:40:05.730°31.2'N079°22.5'E 82.9° 174.2° 21.2 km00m38.21s
Greatest Duration04:49:37.404:48:27.701°16.1'N017°47.9'E 0.0° 66.6° 85.2 km01m22.41s

Explanation of Greatest Eclipse and Greatest Duration

Polynomial Besselian Elements: Annular Solar Eclipse of 2020 Jun 21

Polynomial Besselian Elements
2020 Jun 21 at 07:00:00.0 TD (=t0)
n x y d l1 l2 μ
0 0.15426 0.13640 23.4357 0.55234 0.00615 284.5356
1 0.53115 0.05139 -0.0002 -0.00012 -0.00012 14.9991
2 0.00003 -0.00016 -0.0000 -0.00001 -0.00001 0.0000
3 -0.00001 -0.00000 - - - -
Tan ƒ1 0.0046009
Tan ƒ2 0.0045780

At time t1 (decimal hours), each besselian element is evaluated by:

x = x0 + x1*t + x2*t2 + x3*t3 (or x = Σ [xn*tn]; n = 0 to 3)

where: t = t1 - t0 (decimal hours) and t0 = 7.000

Explanation of Polynomial Besselian Elements

Links for the Annular Solar Eclipse of 2020 Jun 21

Links to Additional Solar Eclipse Information

Eclipse Predictions

Predictions for the Annular Solar Eclipse of 2020 Jun 21 were generated using the JPL DE406 solar and lunar ephemerides. The lunar coordinates were calculated with respect to the Moon's Center of Mass. The predictions are given in both Terrestrial Dynamical Time (TD) and Universal Time (UT1). The parameter ΔT is used to convert between these two times (i.e., UT1 = TD - ΔT). ΔT has a value of 69.7 seconds for this eclipse.

Acknowledgments

Some of the content on this website is based on the book Thousand Year Canon of Solar Eclipses 1501 to 2500. All eclipse calculations are by Fred Espenak, and he assumes full responsibility for their accuracy.

Permission is granted to reproduce eclipse data when accompanied by a link to this page and an acknowledgment:

"Eclipse Predictions by Fred Espenak, www.EclipseWise.com"

The use of diagrams and maps is permitted provided that they are NOT altered (except for re-sizing) and the embedded credit line is NOT removed or covered.