A partial eclipse of the Sun occurs on Saturday 11 August, 2018 UT, lasting from 08:02–11:30 UT. A moderate partial eclipse, with 74% of the Sun covered for viewers closest to the center, will create an interesting spectacle for observers from the Arctic, Greenland, Scandinavia, and north and east Asia.

The timings of the phases of the overall eclipse worldwide are as follows. In any particular place it will be seen for a significantly shorter duration as the shadow moves across the Earth:

Partial eclipse begins: 08:02:05 UT
Maximum eclipse: 09:46:15 UT
Partial eclipse ends: 11:30:39 UT

During this eclipse the Sun will be 0.526° in apparent diameter, 1.3% smaller than average. The Moon will be at perigee, making it fairly large. At maximum eclipse it will be 0.555° in apparent diameter, which is 4.6% larger than average. This has no real effect on this eclipse, since the Moon's central shadow misses the Earth, making this a partial eclipse. The statistics page has information on the ranges of the sizes of the Sun and Moon.

Overview Map

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

Eclipse Season and Saros Series

This eclipse season contains 3 eclipses:

This is the 6th eclipse in solar Saros series 155.The surrounding eclipses in this Saros series are:

Eclipse Parameters

UT Date/time (max) 09:46:17 on 11 Aug UT TDT Date/time (max) 09:47:28 on 11 Aug TDT
Saros Series 155 Number in Series 5
Penumbral Magnitiude Central Magnitiude 0.7368
Gamma 1.1476 Path Width (km) 0
Delta T 1m11s Error ± 0m04s (95%)
Penumbral Duration Partial Duration
Total Duration
Partial Rating minor Total Rating
Sun Distance 151623745 km (93.7%) Moon Distance 358485 km (4.1%)
Sun Diameter 0.526° Moon Diameter 0.555° - 0.555°
Perigee 18:06 on 10 Aug UT Apogee 11:24 on 23 Aug UT
Contact p1 08:02:05 on 11 Aug UT Contact p2
Contact u1 Contact u2
Max eclipse 09:46:15 on 11 Aug UT
Contact u3 Contact u4
Contact p3 Contact p4 11:30:39 on 11 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: 2015-09-17 04:54:30 UTC.