Solar Eclipse Prime Page

Partial Solar Eclipse of 2018 Jul 13

Fred Espenak

Key to Solar Eclipse Figure (below)

Introduction


The Partial Solar Eclipse of 2018 Jul 13 is visible from the following geographic regions:

  • Partial Eclipse: south Australia

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 2018 Jul 13 at 03:02:16 TD (03:01:07 UT1). This is 0.2 days before 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 1182.

The eclipse belongs to Saros 117 and is number 69 of 71 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.

This is a very deep partial eclipse. It has an eclipse magnitude of 0.3365, while Gamma has a value of -1.3542.

The partial solar eclipse of 2018 Jul 13 is followed two weeks later by a total lunar eclipse on 2018 Jul 27.

Another solar eclipse occurs one synodic month after the 2018 Jul 13 eclipse. It is the partial solar eclipse of 2018 Aug 11.

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 69.2 seconds for this eclipse.

The following links provide maps and data for the eclipse.

Global Map Animation of Solar Eclipse

Michael Zeiler GreatAmericanEclipse.com and
Fred Espenak EclipseWise.com have created a series of eclipse animations - one for every solar eclipse during the 21st Century.

The animation of the Partial Solar Eclipse of 2018 Jul 13 shows the path of the Moon's penumbral shadow as it sweeps across a global map of Earth (an orthographic projection). The vantage point of the animation is as seen from the Moon. The daylight hemisphere of Earth then faces the Moon and the lunar shadows appear perfectly circular with no distorted projection effects as they race across Earth.

The Moon's large penumbral shadow is lightly shaded and is outlined with a solid black edge. A partial eclipse is visible from within the penumbra.

The map to the right shows a single frame from the medium size animation for the Partial Solar Eclipse of 2018 Jul 13 . In the upper left corner is the type of eclipse and the eclipse date. To the upper right is the Universal Time. The lower left corner is not used for partial solar eclipses. To the lower right is the credit for the animation.

Animations for the Partial Solar Eclipse of 2018 Jul 13 are available in three sizes/resolutions: small, medium, and large. They can be viewed through the following links:


Creative Commons License
These animations may be freely used and shared through Creative Commons.
You may use and distribute these eclipse animations as long as they are not modified and you include an attribution.
Solar Eclipse Global Animation by Fred Espenak and Michael Zeiler is licensed under a Creative Commons Attribution-NoDerivatives 4.0 International License. Based on work at EclipseWise.com and GreatAmericanEclipse.com

Attribution: "Global Map Animation of Eclipse courtesy of Michael Zeiler (GreatAmericanEclipse.com) and Fred Espenak (EclipseWise.com)".

Eclipse Data: Partial Solar Eclipse of 2018 Jul 13

Eclipse Characteristics
Parameter Value
Eclipse Magnitude 0.33654
Eclipse Obscuration 0.22578
Gamma-1.35423
Conjunction Times
Event Calendar Date and Time Julian Date
Greatest Eclipse 2018 Jul 13 at 03:02:16.1 TD (03:01:07.0 UT1) 2458312.625775
Ecliptic Conjunction 2018 Jul 13 at 02:49:01.2 TD (02:47:52.1 UT1) 2458312.616575
Equatorial Conjunction 2018 Jul 13 at 03:10:13.3 TD (03:09:04.1 UT1) 2458312.631298
Geocentric Coordinates of Sun and Moon
2018 Jul 13 at 03:02:16.1 TD (03:01:07.0 UT1)
Coordinate Sun Moon
Right Ascension07h29m31.1s07h29m10.9s
Declination+21°50'30.6"+20°27'46.1"
Semi-Diameter 15'44.0" 16'42.8"
Eq. Hor. Parallax 08.7" 1°01'20.4"
Geocentric Libration of Moon
Angle Value
l -0.4°
b 1.8°
c 10.1°
Prediction Parameters
Paramater Value
Ephemerides JPL DE405
ΔT 69.2 s
k (penumbra) 0.2725076
k (umbra) 0.2722810
Saros Series 117 (69/71)

Explanation of Solar Eclipse Data Tables

Penumbral Shadow Contacts and Extremes: Partial Solar Eclipse of 2018 Jul 13

Contacts of Penumbral Shadow with Earth
Contact Event Contact Time
TD
Time
UT1
Latitude Longitude
First External ContactP101:49:32.301:48:23.152°56.3'S096°24.4'E
Last External ContactP404:14:55.904:13:46.857°52.3'S168°19.9'E
Extreme Northern and Southern Path Limits of Penumbra
Contact Event Contact Time
TD
Time
UT1
Latitude Longitude
North Extreme Path Limit 1N102:10:38.502:09:29.447°42.7'S085°13.0'E
South Extreme Path Limit 1S103:53:49.803:52:40.753°02.0'S178°54.8'W

Explanation of Penumbral Shadow Contacts and Extremes Tables

Polynomial Besselian Elements: Partial Solar Eclipse of 2018 Jul 13

Polynomial Besselian Elements
2018 Jul 13 at 03:00:00.0 TD (=t0)
n x y d l1 l2 μ
0 -0.09929 -1.35076 21.8453 0.53019 -0.01589 223.5708
1 0.58281 -0.03329 -0.0059 -0.00001 -0.00001 15.0002
2 -0.00000 -0.00008 -0.0000 -0.00001 -0.00001 0.0000
3 -0.00001 0.00000 - - - -
Tan ƒ1 0.0045988
Tan ƒ2 0.0045759

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 = 3.000

Explanation of Polynomial Besselian Elements

Eclipse Publications

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For more visit: AstroPixels Publishing

Links for the Partial Solar Eclipse of 2018 Jul 13

Links to Additional Solar Eclipse Information

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

Decade Tables of Solar Eclipses:
| 1901 - 1910 | 1911 - 1919 | 1921 - 1930 | 1931 - 1940 | 1941 - 1950 |
| 1951 - 1960 | 1961 - 1970 | 1971 - 1980 | 1981 - 1990 | 1991 - 2000 |
| 2001 - 2010 | 2011 - 2020 | 2021 - 2030 | 2031 - 2040 | 2041 - 2050 |
| 2051 - 2060 | 2061 - 2070 | 2071 - 2080 | 2081 - 2090 | 2091 - 2100 |

Solar Eclipse Publications

Eclipse Publications

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For more visit: AstroPixels Publishing

Eclipse Predictions

Predictions for the Partial Solar Eclipse of 2018 Jul 13 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 69.2 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.