Solar Eclipse Prime Page

Annular Solar Eclipse of 1969 Sep 11

Fred Espenak

Key to Solar Eclipse Figure (below)

Introduction


The Annular Solar Eclipse of 1969 Sep 11 is visible from the following geographic regions:

  • Partial Eclipse: Americas
  • Annular Eclipse: Pacific, Peru, Bolivia, Brazil

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 1969 Sep 11 at 19:58:59 TD (19:58:19 UT1). This is 5.2 days after the Moon reaches apogee. During the eclipse, the Sun is in the constellation Leo. The synodic month in which the eclipse takes place has a Brown Lunation Number of 578.

The eclipse belongs to Saros 134 and is number 41 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 annular solar eclipse of 1969 Sep 11 is preceded two weeks earlier by a penumbral lunar eclipse on 1969 Aug 27, and it is followed two weeks later by a penumbral lunar eclipse on 1969 Sep 25.

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 39.9 seconds for this eclipse.

The following links provide maps and data for the eclipse.

Eclipse Data: Annular Solar Eclipse of 1969 Sep 11

Eclipse Characteristics
Parameter Value
Eclipse Magnitude 0.96904
Eclipse Obscuration 0.93904
Gamma 0.22014
Conjunction Times
Event Calendar Date and Time Julian Date
Greatest Eclipse 1969 Sep 11 at 19:58:58.7 TD (19:58:18.8 UT1) 2440476.332162
Ecliptic Conjunction 1969 Sep 11 at 19:56:27.0 TD (19:55:47.1 UT1) 2440476.330406
Equatorial Conjunction 1969 Sep 11 at 19:45:07.4 TD (19:44:27.6 UT1) 2440476.322541
Geocentric Coordinates of Sun and Moon
1969 Sep 11 at 19:58:58.7 TD (19:58:18.8 UT1)
Coordinate Sun Moon
Right Ascension11h19m09.2s11h19m32.8s
Declination+04°23'48.2"+04°34'30.9"
Semi-Diameter 15'53.5" 15'10.1"
Eq. Hor. Parallax 08.7" 0°55'40.1"
Geocentric Libration of Moon
Angle Value
l -4.2°
b -0.3°
c 21.5°
Prediction Parameters
Paramater Value
Ephemerides JPL DE405
ΔT 39.9 s
k (penumbra) 0.2725076
k (umbra) 0.2722810
Saros Series 134 (41/71)

Explanation of Solar Eclipse Data Tables

Penumbral Shadow Contacts and Extremes: Annular Solar Eclipse of 1969 Sep 11

Contacts of Penumbral Shadow with Earth
Contact Event Contact Time
TD
Time
UT1
Latitude Longitude
First External ContactP117:02:10.617:01:30.836°56.6'N169°35.0'W
First Internal ContactP219:15:35.419:14:55.558°50.1'N153°04.8'E
Last Internal ContactP320:42:42.520:42:02.701°11.8'N041°17.5'W
Last External ContactP422:55:46.422:55:06.620°44.1'S076°18.7'W
Extreme Northern and Southern Path Limits of Penumbra
Contact Event Contact Time
TD
Time
UT1
Latitude Longitude
North Extreme Path Limit 1N118:49:16.018:48:36.179°20.6'N142°45.7'E
South Extreme Path Limit 1S118:08:40.218:08:00.308°59.1'N176°26.2'E
North Extreme Path Limit 2N221:09:18.521:08:38.622°31.0'N046°13.1'W
South Extreme Path Limit 2S221:48:57.621:48:17.748°37.4'S062°55.6'W

Explanation of Penumbral Shadow Contacts and Extremes Tables

Umbral Shadow Contacts and Extremes: Annular Solar Eclipse of 1969 Sep 11

Contacts of Umbral Shadow with Earth
Contact Event Contact Time
TD
Time
UT1
Latitude Longitude
First External ContactU118:05:48.318:05:08.441°22.6'N173°56.7'E
First Internal ContactU218:08:57.118:08:17.241°43.4'N173°06.7'E
Last Internal ContactU321:49:10.921:48:31.015°56.9'S059°15.5'W
Last External ContactU421:52:14.221:51:34.416°17.2'S060°03.0'W
Extreme Northern and Southern Path Limits of Umbra
Contact Event Contact Time
TD
Time
UT1
Latitude Longitude
North Extreme Path Limit 1N118:07:47.718:07:07.842°19.9'N173°18.9'E
South Extreme Path Limit 1S118:06:58.618:06:18.740°45.9'N173°44.2'E
North Extreme Path Limit 2N221:50:18.921:49:39.015°21.2'S059°29.6'W
South Extreme Path Limit 2S221:51:05.521:50:25.616°53.0'S059°48.8'W

Explanation of Umbral Shadow Contacts and Extremes Tables

Central Line Extremes and Duration: Annular Solar Eclipse of 1969 Sep 11

Extreme Limits of the Central Line
Contact Event Contact Time
TD
Time
UT1
Latitude Longitude
Extreme Central Line Limit 1C118:07:22.618:06:42.841°32.9'N173°31.7'E
Extreme Central Line Limit 2C221:50:42.621:50:02.816°07.2'S059°39.3'W

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 Eclipse19:58:58.719:58:18.815°35.8'N114°08.0'W 77.2° 209.7° 113.7 km03m11.13s
Greatest Duration18:58:29.118:57:49.230°47.0'N129°50.1'W 55.0° 133.9° 122.1 km03m14.55s

Explanation of Greatest Eclipse and Greatest Duration

Polynomial Besselian Elements: Annular Solar Eclipse of 1969 Sep 11

Polynomial Besselian Elements
1969 Sep 11 at 20:00:00.0 TD (=t0)
n x y d l1 l2 μ
0 0.11380 0.18866 4.3960 0.55946 0.01323 120.8706
1 0.45900 -0.25213 -0.0153 -0.00010 -0.00010 15.0048
2 -0.00000 -0.00004 -0.0000 -0.00001 -0.00001 0.0000
3 -0.00001 0.00000 - - - -
Tan ƒ1 0.0046464
Tan ƒ2 0.0046233

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 = 20.000

Explanation of Polynomial Besselian Elements

Eclipse Publications

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For more visit: AstroPixels Publishing

Links for the Annular Solar Eclipse of 1969 Sep 11

Links to Additional Solar Eclipse Information

  • Home - home page of EclipseWise with predictions for both solar and lunar eclipses

Decade Tables of Solar Eclipses:
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| 1951 - 1960 | 1961 - 1970 | 1971 - 1980 | 1981 - 1990 | 1991 - 2000 |
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Solar Eclipse Publications

Eclipse Publications

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jpeg jpeg
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For more visit: AstroPixels Publishing

Eclipse Predictions

Predictions for the Annular Solar Eclipse of 1969 Sep 11 were generated using the JPL DE405 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 39.9 seconds for this eclipse.

Acknowledgments

Some of the content on this website is based on the books 21st Century Canon of Solar Eclipses and 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 concealed.