Partial Lunar Eclipse of 2023 Oct 28

Fred Espenak

Key to Lunar Eclipse Figure (below)

Introduction

The Partial Lunar Eclipse of 2023 Oct 28 is visible from the following geographic regions:

  • eastern Americas, Europe, Africa, Asia, Australia

The diagram to the right depicts the Moon's path with respect to Earth's umbral and penumbral shadows. Below it is a map showing the geographic regions of eclipse visibility. Click on the figure to enlarge it. For an explanation of the features appearing in the figure, see Key to Lunar Eclipse Figures.

The instant of greatest eclipse takes place on 2023 Oct 28 at 20:15:17 TD (20:14:06 UT1). This is 2.7 days after the Moon reaches perigee. During the eclipse, the Moon is in the constellation Aries. The synodic month in which the eclipse takes place has a Brown Lunation Number of 1247.

The eclipse belongs to Saros 146 and is number 11 of 72 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 partial lunar eclipse of 2023 Oct 28 is preceded two weeks earlier by a annular solar eclipse on 2023 Oct 14.

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., TD = UT1 + ΔT). ΔT has a value of 71.1 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 Lunar Eclipse of 2023 Oct 28 .

Eclipse Data: Partial Lunar Eclipse of 2023 Oct 28

Eclipse Characteristics
Parameter Value
Penumbral Magnitude 1.11997
Umbral Magnitude 0.12393
Gamma 0.94716
Epsilon 0.9362°
Opposition Times
Event Calendar Date & Time Julian Date
Greatest Eclipse 2023 Oct 28 at 20:15:17.0 TD (20:14:05.9 UT1) 2460246.343124
Ecliptic Opposition 2023 Oct 28 at 20:25:12.2 TD (20:24:01.2 UT1) 2460246.350013
Equatorial Opposition 2023 Oct 28 at 21:02:48.5 TD (21:01:37.4 UT1) 2460246.376128
Geocentric Coordinates of Sun and Moon
2023 Oct 28 at 20:15:17.0 TD (20:14:05.9 UT1)
Coordinate Sun Moon
Right Ascension14h11m25.9s02h09m47.6s
Declination-13°14'10.5"+14°05'01.6"
Semi-Diameter 16'05.9" 16'09.7"
Eq. Hor. Parallax 08.9" 0°59'18.9"
Geocentric Libration of Moon
Angle Value
l 4.4°
b -1.2°
c -18.1°
Earth's Shadows
Parameter Value
Penumbral Radius 1.2728°
Umbral Radius 0.7362°
Prediction Paramaters
Paramater Value
Ephemerides JPL DE430
ΔT 71.1 s
Shadow Rule Herald/Sinnott
Shadow Enlargement 1.000
Saros Series 146 (11/72)

Explanation of Lunar Eclipse Data Tables

Eclipse Contacts: Partial Lunar Eclipse of 2023 Oct 28

Lunar Eclipse Contacts
Eclipse Event Contact Time
TD		 Time
UT1		 Zenith Latitude Zenith Longitude Position Angle Axis Distance
Penumbral BeginsP118:02:27.718:01:16.613°31.6'N084°04.3'E 282.2° 1.5431°
Partial BeginsU119:35:52.519:34:41.413°55.2'N061°31.2'E 313.7° 1.0044°
Greatest EclipseGreatest20:15:17.020:14:05.914°05.0'N052°00.4'E 334.9° 0.9362°
Partial EndsU420:54:01.420:52:50.314°14.7'N042°39.3'E 355.8° 1.0021°
Penumbral EndsP422:27:44.122:26:33.014°37.9'N020°02.1'E 27.4° 1.5386°
Eclipse Durations
Eclipse Phase Duration
Penumbral (P4 - P1)04h25m16.3s
Partial (U4 - U1)01h18m08.9s

Explanation of Lunar Eclipse Contacts Table

Polynomial Besselian Elements: Partial Lunar Eclipse of 2023 Oct 28

Polynomial Besselian Elements
2023 Oct 28 at 20:00:00.0 TD (=t0)
n x y d f1 f2 f3
0 -0.52496 0.78794 -0.2310 1.27293 0.73634 0.26939
1 0.50165 0.23509 -0.0002 -0.00039 -0.00040 -0.00011
2 -0.00015 -0.00022 0.0000 -0.00000 -0.00000 -0.00000
3 -0.00001 -0.00000 - - - -

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 Besselian Elements

Eclipse Publications

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For more visit: AstroPixels Publishing


Links for the Partial Lunar Eclipse of 2023 Oct 28

Links to Additional Lunar Eclipse Information

• Decade Tables of Lunar 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 |

Lunar Eclipse Publications

Eclipse Predictions

Predictions for the Partial Lunar Eclipse of 2023 Oct 28 were generated using the JPL DE430 solar and lunar ephemerides. The lunar coordinates were calculated with respect to the Moon's Center of Mass.

The elliptical shape of Earth's umbral and penumbral shadows were calculated using the Herald/Sinnott method of modeling Earth's shadows to compensate for the opacity of the terrestrial atmosphere (including the oblateness of Earth).

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 71.1 seconds for this eclipse.

Acknowledgments

Some of the content on this web site is based on the book 21st Century Canon of Lunar Eclipses. 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.