Penumbral Lunar Eclipse of 2027 Jul 18

Fred Espenak

Introduction


The Penumbral Lunar Eclipse of 2027 Jul 18 is visible from the following geographic regions:

  • eastern Africa, Asia, Australia, Pacific

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 2027 Jul 18 at 16:04:11 TD (16:02:58 UT1). This is 0.8 days before the Moon reaches apogee. During the eclipse, the Moon is in the constellation Sagittarius. The synodic month in which the eclipse takes place has a Brown Lunation Number of 1293.

The eclipse belongs to Saros 110 and is number 72 of 72 eclipses in the series. Thus, the 2027 Jul 18 event is the last eclipse of 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 shallow penumbral eclipse. It has a penumbral eclipse magnitude of only 0.0015 and a penumbral eclipse duration of 12.1 minutes. Gamma has a value of -1.5759.

The penumbral lunar eclipse of 2027 Jul 18 is followed two weeks later by a total solar eclipse on 2027 Aug 02.

Another lunar eclipse occurs one synodic month after the 2027 Jul 18 eclipse. It is the penumbral lunar eclipse of 2027 Aug 17.

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 72.7 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 Penumbral Lunar Eclipse of 2027 Jul 18 .


Eclipse Data: Penumbral Lunar Eclipse of 2027 Jul 18

Eclipse Characteristics
Parameter Value
Penumbral Magnitude 0.00151
Umbral Magnitude-1.06789
Gamma-1.57588
Epsilon 1.4184°
Opposition Times
Event Calendar Date & Time Julian Date
Greatest Eclipse 2027 Jul 18 at 16:04:10.5 TD (16:02:57.8 UT1) 2461605.168724
Ecliptic Opposition 2027 Jul 18 at 15:46:04.5 TD (15:44:51.7 UT1) 2461605.156154
Equatorial Opposition 2027 Jul 18 at 15:09:46.9 TD (15:08:34.1 UT1) 2461605.130951
Geocentric Coordinates of Sun and Moon
2027 Jul 18 at 16:04:10.5 TD (16:02:57.8 UT1)
Coordinate Sun Moon
Right Ascension07h51m14.4s19h52m57.2s
Declination+20°58'43.6"-22°20'25.3"
Semi-Diameter 15'44.3" 14'43.0"
Eq. Hor. Parallax 08.7" 0°54'00.6"
Geocentric Libration of Moon
Angle Value
l 0.9°
b 1.9°
c -9.3°
Earth's Shadows
Parameter Value
Penumbral Radius 1.1739°
Umbral Radius 0.6493°
Prediction Paramaters
Paramater Value
Ephemerides JPL DE406
ΔT 72.7 s
Shadow Rule Danjon
Shadow Enlargement 1.010
Saros Series 110 (72/72)

Explanation of Lunar Eclipse Data Tables

Eclipse Contacts: Penumbral Lunar Eclipse of 2027 Jul 18

Lunar Eclipse Contacts
Eclipse Event Contact Time
TD
Time
UT1
Zenith Latitude Zenith Longitude Position Angle Axis Distance
Penumbral BeginsP115:58:05.415:56:52.722°21.2'S122°43.9'E 165.6° 1.4192°
Greatest EclipseGreatest16:04:10.516:02:57.822°20.4'S121°15.5'E 163.8° 1.4184°
Penumbral EndsP416:10:12.416:08:59.622°19.6'S119°47.9'E 161.9° 1.4191°
Eclipse Durations
Eclipse Phase Duration
Penumbral (P4 - P1)00h12m07.0s

Explanation of Lunar Eclipse Contacts Table

Polynomial Besselian Elements: Penumbral Lunar Eclipse of 2027 Jul 18

Polynomial Besselian Elements
2027 Jul 18 at 16:00:00.0 TD (=t0)
n x y d f1 f2 f3
0 0.36567 -1.37083 0.3662 1.17388 0.64928 0.24528
1 0.43683 0.12700 -0.0001 -0.00005 -0.00005 -0.00001
2 -0.00007 0.00016 -0.0000 0.00000 0.00000 0.00000
3 -0.00000 -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 = 16.000

Explanation of Besselian Elements

Links for the Penumbral Lunar Eclipse of 2027 Jul 18

Links to Additional Lunar Eclipse Information

Eclipse Predictions

Predictions for the Penumbral Lunar Eclipse of 2027 Jul 18 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 72.7 seconds for this eclipse.

Acknowledgments

Some of the content on this web site is based on the book Thousand Year Canon of Lunar 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.