Solar Eclipse Prime Page

Total Solar Eclipse of 1973 Jun 30

Fred Espenak

Introduction


The Total Solar Eclipse of 1973 Jun 30 is visible from the following geographic regions:

  • Partial Eclipse: east South America, south Europe, Africa, Mid East
  • Total Eclipse: Guyana, Suriname, Mauritania, Mali, Niger, Chad, Sudan, Uganda, Kenya

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 1973 Jun 30 at 11:38:41 TD (11:37:57 UT1). This is 0.5 days after the Moon reaches perigee. During the eclipse, the Sun is in the constellation Gemini. The synodic month in which the eclipse takes place has a Brown Lunation Number of 625.

The eclipse belongs to Saros 136 and is number 35 of 71 eclipses in the series. All eclipses in this series occur at the Moon’s descending node. The Moon moves northward with respect to the node with each succeeding eclipse in the series and gamma increases.

The solar eclipse of 1973 Jun 30 is an exceptionally long total eclipse with a duration at greatest eclipse of 07m04s. It has an eclipse magnitude of 1.0792.

The total solar eclipse of 1973 Jun 30 is preceded two weeks earlier by a penumbral lunar eclipse on 1973 Jun 15, and it is followed two weeks later by a penumbral lunar eclipse on 1973 Jul 15.

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 43.8 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 Total Solar Eclipse of 1973 Jun 30 .


Eclipse Data: Total Solar Eclipse of 1973 Jun 30

Eclipse Characteristics
Parameter Value
Eclipse Magnitude 1.07921
Eclipse Obscuration 1.16470
Gamma-0.07853
Conjunction Times
Event Calendar Date & Time Julian Date
Greatest Eclipse 1973 Jun 30 at 11:38:40.6 TD (11:37:56.8 UT1) 2441863.984685
Ecliptic Conjunction 1973 Jun 30 at 11:39:28.6 TD (11:38:44.7 UT1) 2441863.985240
Equatorial Conjunction 1973 Jun 30 at 11:40:00.2 TD (11:39:16.4 UT1) 2441863.985606
Geocentric Coordinates of Sun and Moon
1973 Jun 30 at 11:38:40.6 TD (11:37:56.8 UT1)
Coordinate Sun Moon
Right Ascension06h37m08.4s06h37m05.0s
Declination+23°10'06.4"+23°05'22.3"
Semi-Diameter 15'43.8" 16'41.4"
Eq. Hor. Parallax 08.6" 1°01'15.1"
Geocentric Libration of Moon
Angle Value
l 1.1°
b 0.1°
c 2.2°
Prediction Paramaters
Paramater Value
Ephemerides JPL DE406
ΔT 43.8 s
k (penumbra) 0.2725076
k (umbra) 0.2722810
Saros Series 136 (35/71)

Explanation of Solar Eclipse Data Tables

Penumbral Shadow Contacts and Extremes: Total Solar Eclipse of 1973 Jun 30

Contacts of Penumbral Shadow with Earth
Contact Event Contact Time
TD
Time
UT1
Latitude Longitude
First External ContactP109:01:25.609:00:41.805°51.9'N046°48.5'W
First Internal ContactP210:51:03.810:50:20.000°17.3'S071°34.4'W
Last Internal ContactP312:26:15.212:25:31.417°29.4'S076°45.5'E
Last External ContactP414:15:56.214:15:12.411°22.1'S052°09.1'E
Extreme Northern and Southern Path Limits of Penumbra
Contact Event Contact Time
TD
Time
UT1
Latitude Longitude
North Extreme Path Limit 1N110:14:35.110:13:51.332°43.0'N078°32.2'W
South Extreme Path Limit 1S110:08:01.310:07:17.525°28.6'S049°10.1'W
North Extreme Path Limit 2N213:02:51.613:02:07.815°50.4'N082°19.7'E
South Extreme Path Limit 2S213:09:10.813:08:26.941°56.4'S051°09.9'E

Explanation of Penumbral Shadow Contacts and Extremes Tables

Umbral Shadow Contacts and Extremes: Total Solar Eclipse of 1973 Jun 30

Contacts of Umbral Shadow with Earth
Contact Event Contact Time
TD
Time
UT1
Latitude Longitude
First External ContactU109:54:30.609:53:46.804°30.0'N059°29.3'W
First Internal ContactU209:57:43.409:56:59.504°22.2'N060°14.2'W
Last Internal ContactU313:19:37.613:18:53.812°51.5'S065°33.5'E
Last External ContactU413:22:49.213:22:05.412°43.9'S064°49.1'E
Extreme Northern and Southern Path Limits of Umbra
Contact Event Contact Time
TD
Time
UT1
Latitude Longitude
North Extreme Path Limit 1N109:56:17.409:55:33.605°14.9'N060°15.4'W
South Extreme Path Limit 1S109:55:58.409:55:14.503°37.3'N059°28.6'W
North Extreme Path Limit 2N213:21:03.313:20:19.411°59.4'S065°35.6'E
South Extreme Path Limit 2S213:21:21.913:20:38.013°36.0'S064°47.3'E

Explanation of Umbral Shadow Contacts and Extremes Tables

Central Line Extremes and Duration: Total Solar Eclipse of 1973 Jun 30

Extreme Limits of the Central Line
Contact Event Contact Time
TD
Time
UT1
Latitude Longitude
Extreme Central Line Limit 1C109:56:07.009:55:23.204°26.1'N059°51.8'W
Extreme Central Line Limit 2C213:21:13.413:20:29.612°47.7'S065°11.3'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 Eclipse11:38:40.611:37:56.818°50.3'N005°26.8'E 85.6° 9.3° 256.5 km07m03.55s
Greatest Duration11:34:54.011:34:10.219°09.3'N004°22.5'E 85.1° 34.1° 256.6 km07m03.84s

Explanation of Greatest Eclipse and Greatest Duration

Polynomial Besselian Elements: Total Solar Eclipse of 1973 Jun 30

Polynomial Besselian Elements
1973 Jun 30 at 12:00:00.0 TD (=t0)
n x y d l1 l2 μ
0 0.19179 -0.11111 23.1678 0.53061 -0.01547 359.1132
1 0.57547 -0.09466 -0.0023 0.00002 0.00002 14.9994
2 -0.00004 -0.00016 -0.0000 -0.00001 -0.00001 0.0000
3 -0.00001 0.00000 - - - -
Tan ƒ1 0.0045982
Tan ƒ2 0.0045753

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 = 12.000

Explanation of Polynomial Besselian Elements

Links for the Total Solar Eclipse of 1973 Jun 30

Links to Additional Solar Eclipse Information

Eclipse Predictions

Predictions for the Total Solar Eclipse of 1973 Jun 30 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 43.8 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.