A total eclipse of the Sun occurred on Tuesday 27 September, 1791 UT (16 Sep, 1791 Old Style), with maximum eclipse at 23:42 UT. The Sun was darkened for 1 minute and 38 seconds by a dramatic total eclipse covering a path up to 106 km wide. This was a sight worth seeing, and was visible from south-western and south-eastern Australia. The partial eclipse was visible across Australia and New Zealand.

The total eclipse lasted for 1 minute and 38 seconds. Maximum eclipse was at 23:42:14 UT.

During this eclipse the Sun was 0.533° in apparent diameter, around average. The Moon was just 3 days before perigee, making it relatively large. At the start and end of the eclipse the Moon was 0.537°, and at maximum eclipse 0.544°, which is 2.4% larger than average; hence it covered the Sun, making this a total eclipse. The statistics page has information on the ranges of the sizes of the Sun and Moon.

This eclipse was observed by Captain George Vancouver at Eclipse Island in Western Australia. Although he was not placed to see the total eclipse, he named the island for the spectacle. See Wikipedia's article on the island.

Overview Map

This map sourced from NASA's Eclipse Web Site shows the visibility of the total solar eclipse. It also shows the broader area in which a partial eclipse was seen. (Click on it for the full-sized version.)

Eclipse Season and Saros Series

This eclipse season contains 2 eclipses:

This was the 48th eclipse in solar Saros series 121.The surrounding eclipses in this Saros series are:

Eclipse Parameters

UT Date/time (max) 23:42:14 on 27 Sep UT TDT Date/time (max) 23:42:30 on 27 Sep TDT
Saros Series 121 Number in Series 47
Penumbral Magnitiude Central Magnitiude 1.0206
Gamma -0.7492 Path Width (km) 106
Delta T 0m16s Error ± 0m02s (95%)
Penumbral Duration Partial Duration
Total Duration 1m38s
Partial Rating Total Rating
Sun Distance 149758471 km (55.1%) Moon Distance 370350 km (27.7%)
Sun Diameter 0.533° Moon Diameter 0.537° - 0.544°
Apogee 00:08 on 19 Sep UT Perigee 20:04 on 30 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 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.