Want to do some eclipse research of your own? Well, now it's easy!
Our entire database of eclipses can be searched right here.
Don't forget that you can also directly browse the solar and lunar
eclipse catalogs; and we have a page of statistics of eclipse occurrences.
Query the Eclipse Database
To do a search, pick a range of years to search, or leave those
fields blank to search the whole database. Then pick parameters to narrow
down your search.
Any field left blank will match all possible values for that field.
Leaving all the fields blank, and selecting all the eclipse types,
will return the whole database; since this is huge, the results are
broken up into pages.
Note that all eclipses are identified by their date in UT; also, all
dates in the database up to Oct 04, 1582 are in the Julian calendar, and
all dates from Oct 15, 1582 are Gregorian. See
What's the Time for more information
on dates and times.
Key to Fields
- UT Date / Time
- The date and time of the moment of greatest eclipse, in UT. This is the
instant when the axis of the Moon's shadow passes closest to the
Earth's center. For total eclipses, this is virtually identical to the
instants of greatest magnitude and greatest duration.
- Local Time
- The date and time of the moment of greatest eclipse, in your
chosen time zone; this is present for eclipses in the Gregorian calendar
era, i.e. from October 1582 onwards. This will be blank if you haven't
set a timezone.
- Month / Day
- You can search the database for eclipses occurring on a particular
month and/or day in Universal Time.
Bear in mind that an eclipse may be on a different
day in your timezone; so it might be worth searching a day or two on
either side of the date you're interested in.
- The type of the eclipse.
- Saros Series (SS)
- The Saros series of the eclipse.
When searching for a given Saros, bear in mind that if a Saros started
before 2000 BC, or ends after 3000 AD, only part of the series will be
- The penumbral and umbral magnitudes of the eclipse. Note that penumbral
magnitude only applies to a lunar eclipse. For a lunar eclipse,
the magnitude is the fraction of the Moon's diameter which is obscured
by the penumbra or umbra; for a solar eclipse, the umbral magnitude
is the fraction of the Sun's diameter which is obscured at the moment
of greatest eclipse.
- Gamma (Gam)
- The distance of the the axis of the Moon's shadow from the
Earth's center at maximum eclipse (the Earth's shadow axis from the Moon's
centre in a lunar eclipse), measured as a fraction of the
Earth's radius. A negative value indicates that the eclipse is below
the centre of the Earth as seen from the Sun; this is not necessarily
the same as being centred south of the equator, due to the Earth's tilt.
The search form looks at absolute value of gamma — ie. it
treats all values as positive — so that you can search for eg.
all marginal eclipses without having to do two searches. Hence searching
for values < 0 will return nothing.
- The durations of the partial and total phases of the eclipse. Note
that partial duraton is only given for a lunar eclipse. For a solar
eclipse, the total duration is the duration of the
total or annular eclipse (if any) at the point of greatest
This search engine is derived from the
5,000 year eclipse catalogs from NASA;
however, any bugs in the results are almost certainly mine, for which I
apologise in advance. If you see anything wrong, feel free to