Timezone / Date

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Accuracy

Due to the erratic rotation of the Earth, the time and location of the eclipse cannot be forecast perfectly. This eclipse's time is estimated to be accurate ± 1h32m (with 95% confidence). This equates to an error in longitude of ± 22 degrees, or around ± 2448 km (1521 miles) at the latitude of greatest eclipse.

A total eclipse of the Moon occurred on 21 May, 1766 BC UT Old Style, with maximum eclipse at 11:00 UT. The Moon was plunged into darkness for 1 hour and 22 minutes, in a deep total eclipse which saw the Moon 38% of its diameter inside the Earth's umbral shadow. The visual effect of this depends on the state of the Earth's atmosphere, but the Moon may have been stained a deep red colour. The partial eclipse lasted for 3 hours and 25 minutes in total.

The penumbral eclipse lasted for 5 hours and 14 minutes. The partial eclipse lasted for 3 hours and 25 minutes. The total eclipse lasted for 1 hour and 22 minutes. Maximum eclipse was at 11:00:54 UT.

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 eclipse belongs to lunar Saros series 12.The surrounding eclipses in this Saros series are:

This Saros series, lunar Saros series 12, is linked to solar Saros series 19. The nearest partner eclipses in that series are:

Eclipse Parameters

UT Date/time (max) 11:00:54 on 21 May UT TDT Date/time (max) 22:22:53 on 21 May TDT
Saros Series 12 Number in Series
Penumbral Magnitiude 2.3263 Central Magnitiude 1.3816
Gamma 0.2745 Path Width (km)
Delta T 11h22m Error ± 1h32m (95%)
Penumbral Duration 5h14m Partial Duration 3h25m
Total Duration 1h22m
Partial Rating Total Rating

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.

Data last updated: 2015-06-21 22:11:38 UTC.