A partial eclipse of the Moon occurred on Tuesday 23 August, 1831 UT (11 Aug, 1831 Old Style), with maximum eclipse at 09:59 UT. The Earth's shadow on the moon was clearly visible in this eclipse, with 48% of the Moon in shadow; the partial eclipse lasted for 2 hours and 32 minutes.

The penumbral eclipse lasted for 5 hours and 9 minutes. The partial eclipse lasted for 2 hours and 32 minutes. Maximum eclipse was at 09:59:49 UT.

During this eclipse the Moon was 6 days after apogee and 8 days before perigee. At maximum eclipse it was 0.524° in apparent diameter, which is 1.4% 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 was visible within the bright area on the map. Note that the map is approximate, and if you were near the edge of the area of visibility, the moon was very close to the horizon and may not have been 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 Goddard Space flight Center: GSFC Eclipse Web SiteGSFC Eclipse Web Site
The primary source of all the information on eclipses presented here at Hermit Eclipse. [NASA Goddard Space flight Center]
https://eclipse.gsfc.nasa.gov/eclipse.html
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 was the 13th eclipse in lunar Saros series 135.The surrounding eclipses in this Saros series are:

Eclipse Parameters

UT Date/time (max) 09:59:49 on 23 Aug UT TDT Date/time (max) 09:59:56 on 23 Aug TDT
Saros Series 135 Number in Series 12
Penumbral Magnitiude 1.5067 Central Magnitiude 0.4833
Gamma -0.7428 Path Width (km)
Delta T 0m07s Error ± 0m01s (95%)
Penumbral Duration 5h09m Partial Duration 2h32m
Total Duration
Partial Rating Total Rating
Sun Distance 151202459 km (85.0%) Moon Distance 386399 km (59.6%)
Sun Diameter 0.527° Moon Diameter 0.515° - 0.524°
Apogee 22:09 on 16 Aug UT Perigee 16:12 on 31 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 listingsGSFC Eclipse Web Site
The primary source of all the information on eclipses presented here at Hermit Eclipse. [NASA Goddard Space flight Center]
https://eclipse.gsfc.nasa.gov/eclipse.html
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.