A penumbral eclipse of the Moon occurred on Tuesday 11 September, 1821 UT (30 Aug, 1821 Old Style), with maximum eclipse at 23:04 UT. This very subtle penumbral eclipse was essentially invisible to the naked eye; though it lasted 3 hours and 3 minutes, just 50% of the Moon's disc was in partial shadow (with no part of it in complete shadow).
The penumbral eclipse lasted for 3 hours and 3 minutes.
Maximum eclipse was at 23:04:45 UT.
During this eclipse the Moon was just a day before perigee, making it very large.
At maximum eclipse it was 0.559° in apparent
diameter, which is 5.4% larger than average.
The statistics page has information on the ranges of the sizes of
the Sun and Moon, and the Moon data page displays detailed
information on the Moon's key dates.
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.
The interactive map is currently not available.
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)
shows the visibility of the eclipse. (Click on it for the
full-sized version.)
Eclipse Season and Saros Series
This eclipse season contains 3 eclipses:
This was the 5th eclipse in lunar Saros series 144.The surrounding eclipses in this Saros series are:
This Saros series, lunar Saros series 144,
is linked to solar Saros series 151. The
nearest partner eclipses in that series are:
Eclipse Parameters
| UT Date/time (max) | 23:04:45 on 11 Sep UT |
TDT Date/time (max) | 23:04:56 on 11 Sep TDT |
| Saros Series | 144 |
Number in Series | 5 |
| Penumbral Magnitiude | 0.4971 |
Central Magnitiude | -0.4666 |
| Gamma | 1.2766 |
Path Width (km) | |
| Delta T | 0m11s |
Error | ± 0m01s (95%) |
| Penumbral Duration | 3h03m |
Partial Duration | |
| Total Duration | |
| |
| Partial Rating | |
Total Rating | |
| Sun Distance | 150458171 km (69.6%) |
Moon Distance | 362066 km (11.3%) |
| Sun Diameter | 0.530° |
Moon Diameter | 0.550° - 0.559° |
| Apogee | 08:01 on 1 Sep UT |
Perigee | 10:22 on 13 Sep 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)
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, and the Moon data page displays detailed
information on the Moon's key dates.
Data last updated: 2015-06-21 22:11:46 UTC.
