Two to five eclipses of the Sun occur every year. Each of these events is only visible within the 7,000 kilometer wide track of the Moon's penumbral shadow as it sweeps across a portion of the Earth. If the dark core of the Moon's shadow (umbra) also crosses the Earth, then either an annular or total eclipse will be seen within its very narrow path. The umbral path is typically about 100 to 200 kilometers wide. For any given location, a partial eclipse occurs about once every two or three years. In comparison, annular and total eclipses are far rarer events. Eclipses for Beginners examines the geometry of solar eclipses in greater detail. Please note that extreme care must be taken when viewing a solar eclipse.

The table below summarizes the types and numbers of eclipses visible each century from Casa Grande Ruins during the period 0001 to 3000 ( 0001 CE to 3000 CE ). The last two columns list the years in which annular and total eclipses are visible from this location. During this interval, 7 annular eclipses are visible from Casa Grande Ruins ( 0128, 0559*, 1062, 2269, 2422, 2551 and 2851* ). For the same period, 11 total eclipses are visible from Casa Grande Ruins ( 0310*, 0736, 0797, 1076*, 1379, 1623, 1806, 2205, 2207*, 2498 and 2617 ). Annular and total eclipses are extraordinarily uncommon events when viewed from a single place. On average, an annular eclipse is seen once every 224 years, while a total eclipse is seen once every 375 years. However, there can be significant variations in these averages.

The geographic coordinates used in these predictions are for a single position in central Casa Grande Ruins . But cities are not simply singular points on the surface of the Earth. They cover geographic regions many tens of square kilometers in area. An eclipse path may miss the center of a city yet still be visible from within the city limits. To cover for this possibility, any partial eclipse seen from the city's center is counted as annular or total if some portion of its umbral path passes within 15 km of the city's coordinates.

The Julian calendar does not include the year 0, so the year 1 BCE¹ is followed by the year 1 CE. This is awkward for arithmetic calculations. In this catalog, dates are counted using the astronomical numbering system which recognizes the year 0. Historians should note the numerical difference of one year between astronomical dates and BCE dates. Thus, the year "0" corresponds to 1 BCE, and year "-100" corresponds to 101 BCE, etc.. (See: Year Dating Conventions )

¹BCE (Before Common Era) and CE (Common Era) are secular alternatives for the terms BC and AD, respectively. For more information, see Year Dating Conventions.

The following catalog features the primary details for all annular and total eclipses visible from Casa Grande Ruins during the period 0001 to 3000 ( 0001 CE to 3000 CE ). For convenience, all dates and times are given in local standard time (= GMT - 7.0) . Note that if daylight savings time is in effect, then one hour must be added to the times. In addition to the date and the type of eclipse visible from Casa Grande Ruins , the local times for the beginning, maximum and end of the eclipse are given. For maximum eclipse, each catalog lists the Sun's altitude and azimuth as well as the magnitude (fraction of Sun's diameter covered) and obscuration (fraction of Sun's area covered). A magnitude of 1.0 or greater is a total eclipse while a magnitude less than 1.0 is either an annular or partial eclipse. Next, the distances (km) from Casa Grande Ruins to the center line and path edge are provided. If the city coordinates are inside the umbral eclipse path, then the tabulated distance to the path edge is negative. Positive values imply that the geographic coordinates are just outside the path, but that an annular or total eclipse is still visible from some portions of the city. Finally, the last column provides special comments about the eclipse. If the central coordinates of Casa Grande Ruins are within the path, then the duration of annularity or totality is given. For a complete description of each item in the catalog, please see Key to Solar Eclipse Viewing Circumstances.

BCE (Before Common Era) and CE (Common Era) are secular alternatives for the terms BC and AD, respectively. For more information, see Year Dating Conventions.

                                                                      Since
            Eclipse Eclipse  Maximum  Eclipse Sun  Sun  Eclip. Eclip.  Last    Dist.  Dist.   Special
     Date     Type  Begins   Eclipse   Ends   Alt  Azm   Mag.   Obs.  Eclipse Center  Edge    Notes
                      h  m     h  m     h  m    °    °                  yrs     km     km

 0128 Aug 13   A:a   08:22    09:49    11:25   50  106  0.975  0.943     -       37    -15    ANNULAR - 01m53s
 0310 May 15   T:p   05:33    06:24    07:19   11   75  0.999  1.000  181.8     163      7    TOTAL -    7 km to path
 0559 Dec 14   A:p   13:11    14:49    16:13   24  216  0.958  0.922  249.6     104     12    ANNULAR - 12 km to path
 0736 Jun 13   T:t   13:51    15:16    16:32   51  267  1.012  1.000  176.5      27    -42    TOTAL -   02m53s
 0797 Aug 26   T:t   10:00    11:19    12:41   62  144  1.015  1.000   61.2      38    -49    TOTAL -   03m42s
 1062 Dec 03   A:a   09:44    11:32    13:29   33  167  0.940  0.851  265.3     143   -110    ANNULAR - 07m45s
 1076 Mar 07   T:p   15:40    16:50    17:54   21  253  0.998  0.999   13.3      36      6    TOTAL -    6 km to path
 1379 May 16   T:t   07:08    08:10    09:18   33   85  1.027  1.000  303.2      12   -109    TOTAL -   03m47s
 1623 Oct 23   T:t   13:29    14:53    16:09   31  228  1.013  1.000  244.4       5    -78    TOTAL -   02m13s
 1806 Jun 16   T:t   06:59    08:02    09:12   32   81  1.019  1.000  182.6      25    -71    TOTAL -   03m14s
 2205 Jul 17   T:t   05:44    06:38    07:38   13   73  1.002  1.000  399.1      70     -9    TOTAL -   01m03s
 2207 Nov 20   T:p   09:06    10:20    11:40   31  149  0.999  1.000    2.3      76      5    TOTAL -    5 km to path
 2269 Jul 29   A:a   12:47    14:24    15:49   61  246  0.973  0.946   61.7      53     -1    ANNULAR - 00m35s
 2422 Nov 14   A:a   07:21    08:40    10:13   18  128  0.956  0.866  153.3      38   -104    ANNULAR - 05m55s
 2498 Oct 15   T:t   07:44    08:50    10:03   26  122  1.024  1.000   75.9       6    -83    TOTAL -   03m26s
 2551 Jun 05   A:a   06:05    07:10    08:23   21   76  0.967  0.923   52.6      62    -26    ANNULAR - 01m56s
 2617 May 26   T:t   15:48    17:01    18:06   28  278  1.005  1.000   66.0      33    -19    TOTAL -   01m33s
 2851 Apr 22   A:p   06:05    07:10    08:24   16   86  0.943  0.893  233.9     165     13    ANNULAR - 13 km to path

The following two catalogs provide more details for solar eclipses visible from Casa Grande Ruins during the period 0001 to 3000 ( 0001 CE to 3000 CE ). The first catalog lists the local circumstances (times, magnitude, etc.) for every eclipse visible from the city. The second catalog includes only major eclipses (magnitude greater than 0.85 , including nearby annular and total eclipses). The catalogs should prove useful for historical research or for planning future observations.

Eclipse Predictions & WebMaster: Fred Espenak e-mail: espenak@gsfc.nasa.gov Planetary Systems Branch - Code 693 NASA/Goddard Space Flight Center, Greenbelt, Maryland 20771 USA