Solar Eclipse Prime Page

Partial Solar Eclipse of 1971 Jul 22

Fred Espenak

Introduction


The Partial Solar Eclipse of 1971 Jul 22 is visible from the following geographic regions:

  • Partial Eclipse: northeast Asia, north Alaska

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 1971 Jul 22 at 09:31:55 TD (09:31:14 UT1). This is 5.7 days before the Moon reaches apogee. During the eclipse, the Sun is in the constellation Cancer. The synodic month in which the eclipse takes place has a Brown Lunation Number of 601.

The eclipse belongs to Saros 116 and is number 70 of 70 eclipses in the series. Thus, the 1971 Jul 22 event is the last eclipse of 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.

This is a very deep partial eclipse. It has an eclipse magnitude of 0.0690, while Gamma has a value of 1.5130.

The partial solar eclipse of 1971 Jul 22 is followed two weeks later by a total lunar eclipse on 1971 Aug 06.

Another solar eclipse occurs one synodic month after the 1971 Jul 22 eclipse. It is the partial solar eclipse of 1971 Aug 20.

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 41.8 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 Partial Solar Eclipse of 1971 Jul 22 .


Eclipse Data: Partial Solar Eclipse of 1971 Jul 22

Eclipse Characteristics
Parameter Value
Eclipse Magnitude 0.06899
Eclipse Obscuration 0.02136
Gamma 1.51298
Conjunction Times
Event Calendar Date & Time Julian Date
Greatest Eclipse 1971 Jul 22 at 09:31:55.3 TD (09:31:13.5 UT1) 2441154.896684
Ecliptic Conjunction 1971 Jul 22 at 09:15:39.4 TD (09:14:57.6 UT1) 2441154.885389
Equatorial Conjunction 1971 Jul 22 at 08:38:38.2 TD (08:37:56.4 UT1) 2441154.859680
Geocentric Coordinates of Sun and Moon
1971 Jul 22 at 09:31:55.3 TD (09:31:13.5 UT1)
Coordinate Sun Moon
Right Ascension08h04m17.6s08h06m05.8s
Declination+20°22'36.4"+21°43'24.7"
Semi-Diameter 15'44.4" 15'17.0"
Eq. Hor. Parallax 08.7" 0°56'05.5"
Geocentric Libration of Moon
Angle Value
l 4.9°
b -1.8°
c 10.5°
Prediction Paramaters
Paramater Value
Ephemerides JPL DE406
ΔT 41.8 s
k (penumbra) 0.2725076
k (umbra) 0.2722810
Saros Series 116 (70/70)

Explanation of Solar Eclipse Data Tables

Penumbral Shadow Contacts and Extremes: Partial Solar Eclipse of 1971 Jul 22

Contacts of Penumbral Shadow with Earth
Contact Event Contact Time
TD
Time
UT1
Latitude Longitude
First External ContactP108:52:56.708:52:14.969°09.9'N144°01.3'W
Last External ContactP410:11:20.610:10:38.854°13.8'N149°56.6'E
Extreme Northern and Southern Path Limits of Penumbra
Contact Event Contact Time
TD
Time
UT1
Latitude Longitude
North Extreme Path Limit 1N108:58:26.108:57:44.369°34.7'N136°45.4'W
South Extreme Path Limit 1S110:05:55.610:05:13.951°40.4'N148°17.5'E

Explanation of Penumbral Shadow Contacts and Extremes Tables

Polynomial Besselian Elements: Partial Solar Eclipse of 1971 Jul 22

Polynomial Besselian Elements
1971 Jul 22 at 10:00:00.0 TD (=t0)
n x y d l1 l2 μ
0 0.68554 1.37127 20.3697 0.55454 0.00834 328.4145
1 0.50543 -0.15726 -0.0078 0.00010 0.00010 15.0008
2 -0.00008 -0.00018 -0.0000 -0.00001 -0.00001 0.0000
3 -0.00001 0.00000 - - - -
Tan ƒ1 0.0046021
Tan ƒ2 0.0045792

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 = 10.000

Explanation of Polynomial Besselian Elements

Links for the Partial Solar Eclipse of 1971 Jul 22

Links to Additional Solar Eclipse Information

Eclipse Predictions

Predictions for the Partial Solar Eclipse of 1971 Jul 22 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 41.8 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.