An annular eclipse of the Sun occurred on Monday 18 April, 1977 UT, with maximum eclipse at 10:30 UT. The Sun was 94% covered in a moderate annular eclipse, lasting 7 minutes and 4 seconds and covering a broad path up to 220 km wide.
The annular eclipse lasted for 7 minutes and 4 seconds.
Maximum eclipse was at 10:30:42 UT.
During this eclipse the Sun was 0.531° in apparent
diameter, 0.4% smaller than average. The Moon was just 3 days before apogee, making it very small.
At maximum eclipse it was 0.502° in
apparent diameter, which is 5.5% smaller than average; this was not
large enough to cover the Sun, which is why this
was an annular eclipse.
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.
The shaded area saw the annular solar eclipse; however, near the edges of
this area, the eclipse was very short. The bold line shows the centre
of the path, where the eclipse lasted longest.
Use the zoom controls to zoom in and out; hover your mouse over any
point on the centreline to see the time and
duration of the eclipse at that point. You can pan and zoom the map to
see detail for any part of the eclipse path.
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 annular 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 29th eclipse in solar Saros series 138.The surrounding eclipses in this Saros series are:
This Saros series, solar Saros series 138,
is linked to lunar Saros series 131. The
nearest partner eclipses in that series are:
Eclipse Parameters
| UT Date/time (max) | 10:30:42 on 18 Apr UT |
TDT Date/time (max) | 10:31:30 on 18 Apr TDT |
| Saros Series | 138 |
Number in Series | 29 |
| Penumbral Magnitiude | |
Central Magnitiude | 0.9449 |
| Gamma | -0.399 |
Path Width (km) | 220 |
| Delta T | 0m48s |
Error | ± 0m00s (95%) |
| Penumbral Duration | |
Partial Duration | |
| Total Duration | 7m04s |
| |
| Partial Rating | |
Total Rating | |
| Sun Distance | 150242227 km (65.1%) |
Moon Distance | 402593 km (91.8%) |
| Sun Diameter | 0.531° |
Moon Diameter | 0.494° - 0.502° |
| Perigee | 20:46 on 5 Apr UT |
Apogee | 11:57 on 21 Apr 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.
