A total eclipse of the Moon occurs on Thursday 17 August, 2073 UT, with maximum eclipse at 17:40 UT. A shallow total eclipse will see the Moon in relative darkness for 50 minutes and 6 seconds. The Moon will be 10% of its diameter into the Earth's umbral shadow, and should be significantly darkened. The partial eclipse will last for 3 hours and 32 minutes in total.

The penumbral eclipse lasts for 5 hours and 51 minutes. The partial eclipse lasts for 3 hours and 32 minutes. The total eclipse lasts for 50 minutes and 6 seconds. Maximum eclipse is at 17:40:18 UT.

During this eclipse the Moon will be 11 days after perigee and 5 days before apogee. At maximum eclipse it will be 0.511° in apparent diameter, which is 3.8% smaller than average. The statistics page has information on the ranges of the sizes of the Sun and Moon.

Interactive Map

This map shows the visibility of the eclipse at maximum eclipse, when it will be visible within the bright area on the map. Note that the map is approximate, and if you are near the edge of the area of visibility, the moon will be very close to the horizon and may not be practically visible.

You can use the zoom controls to zoom in and out, and pan to see areas of interest. The green marker in the centre shows where the Moon will be directly overhead at maximum eclipse.

Overview Map

This map sourced from NASA's Eclipse Web Site shows the visibility of the eclipse. (Click on it for the full-sized version.)

Eclipse Season and Saros Series

This eclipse season contains 2 eclipses:

This is the 24th eclipse in lunar Saros series 139.The surrounding eclipses in this Saros series are:

Eclipse Parameters

UT Date/time (max) 17:40:18 on 17 Aug UT TDT Date/time (max) 17:42:41 on 17 Aug TDT
Saros Series 139 Number in Series 23
Penumbral Magnitiude 2.1479 Central Magnitiude 1.1013
Gamma -0.3998 Path Width (km)
Delta T 2m23s Error ± 0m56s (95%)
Penumbral Duration 5h51m Partial Duration 3h32m
Total Duration 50m06s
Partial Rating Total Rating
Sun Distance 151445309 km (90.0%) Moon Distance 395797 km (78.3%)
Sun Diameter 0.527° Moon Diameter 0.503° - 0.511°
Perigee 17:23 on 6 Aug UT Apogee 13:28 on 22 Aug UT

Note that while all dates and times on this site (except where noted) are in UT, which is within a second of civil time, the dates and times shown in NASA's eclipse listings are in the TDT timescale.

The Sun and Moon distances are shown in km, and as a percentage of their minimum - maximum distances; hence 0% is the closest possible (Earth's perihelion, or the Moon's closest possible perigee) and 100% is the farthest (aphelion, the farthest apogee). The statistics page has information on the ranges of sizes of the Sun and Moon.

Data last updated: 2015-06-21 22:11:46 UTC.