| Annular eclipse | |
 Map | |
| Gamma | −0.4956 |
|---|---|
| Magnitude | 0.9995 |
| Maximum eclipse | |
| Duration | 3 s (0 min 3 s) |
| Coordinates | 52°48′S124°48′W / 52.8°S 124.8°W /-52.8; -124.8 |
| Max. width of band | 2 km (1.2 mi) |
| Times (UTC) | |
| Greatest eclipse | 20:22:53 |
| References | |
| Saros | 140 (24 of 71) |
| Catalog # (SE5000) | 9343 |
An annularsolar eclipse occurred at the Moon'sdescending node of orbit between Monday, January 3 and Tuesday, January 4, 1927,[1] with amagnitude of 0.9995. Asolar eclipse occurs when theMoon passes betweenEarth and theSun, thereby totally or partly obscuring the image of the Sun for a viewer on Earth. An annular solar eclipse occurs when the Moon'sapparent diameter is smaller than the Sun's, blocking most of the Sun's light and causing the Sun to look like anannulus (ring). An annular eclipse appears as a partial eclipse over a region of the Earth thousands of kilometres wide. The Moon's apparent diameter was near the average diameter because it occurred 8.6 days afterapogee (on December 26, 1926, at 7:10 UTC) and 3.3 days beforeperigee (on January 7, 1927, at 3:00 UTC).[2]
Annularity was visible fromNew Zealand on January 4 (Tuesday), andChile,Argentina,Uruguay and southernBrazil on January 3 (Monday). A partial eclipse was visible for parts ofOceania,Antarctica, andSouth America.
View of the eclipse fromBuenos Aires
Shown below are two tables displaying details about this particular solar eclipse. The first table outlines times at which the Moon's penumbra or umbra attains the specific parameter, and the second table describes various other parameters pertaining to this eclipse.[3]
| Event | Time (UTC) |
|---|---|
| First Penumbral External Contact | 1927 January 3 at 17:44:12.4 UTC |
| First Umbral External Contact | 1927 January 3 at 18:48:36.9 UTC |
| First Central Line | 1927 January 3 at 18:49:09.7 UTC |
| Greatest Duration | 1927 January 3 at 18:49:09.7 UTC |
| First Umbral Internal Contact | 1927 January 3 at 18:49:42.5 UTC |
| Greatest Eclipse | 1927 January 3 at 20:22:53.1 UTC |
| Equatorial Conjunction | 1927 January 3 at 20:23:09.7 UTC |
| Ecliptic Conjunction | 1927 January 3 at 20:28:11.0 UTC |
| Last Umbral Internal Contact | 1927 January 3 at 21:56:05.6 UTC |
| Last Central Line | 1927 January 3 at 21:56:35.8 UTC |
| Last Umbral External Contact | 1927 January 3 at 21:57:05.9 UTC |
| Last Penumbral External Contact | 1927 January 3 at 23:01:27.9 UTC |
| Parameter | Value |
|---|---|
| Eclipse Magnitude | 0.99947 |
| Eclipse Obscuration | 0.99894 |
| Gamma | −0.49559 |
| Sun Right Ascension | 18h54m14.6s |
| Sun Declination | -22°51'45.8" |
| Sun Semi-Diameter | 16'15.9" |
| Sun Equatorial Horizontal Parallax | 08.9" |
| Moon Right Ascension | 18h54m13.9s |
| Moon Declination | -23°20'50.4" |
| Moon Semi-Diameter | 16'01.7" |
| Moon Equatorial Horizontal Parallax | 0°58'49.4" |
| ΔT | 24.5 s |
This eclipse is part of aneclipse season, a period, roughly every six months, when eclipses occur. Only two (or occasionally three) eclipse seasons occur each year, and each season lasts about 35 days and repeats just short of six months (173 days) later; thus two full eclipse seasons always occur each year. Either two or three eclipses happen each eclipse season. In the sequence below, each eclipse is separated by afortnight.
| December 19 Ascending node (full moon) | January 3 Descending node (new moon) |
|---|---|
 | |
| Penumbral lunar eclipse Lunar Saros 114 | Annular solar eclipse Solar Saros 140 |
This eclipse is a member of asemester series. An eclipse in a semester series of solar eclipses repeats approximately every 177 days and 4 hours (a semester) at alternatingnodes of the Moon's orbit.[4]
The partial solar eclipses onMarch 5, 1924 andAugust 30, 1924 occur in the previous lunar year eclipse set, and the solar eclipses onMay 19, 1928 andNovember 12, 1928 occur in the next lunar year eclipse set.
| Solar eclipse series sets from 1924 to 1928 | ||||||
|---|---|---|---|---|---|---|
| Ascending node | Descending node | |||||
| Saros | Map | Gamma | Saros | Map | Gamma | |
| 115 | July 31, 1924 Partial | −1.4459 | 120 | January 24, 1925 Total | 0.8661 | |
| 125 | July 20, 1925 Annular | −0.7193 | 130 Totality inSumatra, Indonesia | January 14, 1926 Total | 0.1973 | |
| 135 | July 9, 1926 Annular | 0.0538 | 140 | January 3, 1927 Annular | −0.4956 | |
| 145 | June 29, 1927 Total | 0.8163 | 150 | December 24, 1927 Partial | −1.2416 | |
| 155 | June 17, 1928 Partial | 1.5107 | ||||
This eclipse is a part ofSaros series 140, repeating every 18 years, 11 days, and containing 71 events. The series started with a partial solar eclipse on April 16, 1512. It contains total eclipses from July 21, 1656 through November 9, 1836; hybrid eclipses from November 20, 1854 throughDecember 23, 1908; and annular eclipses fromJanuary 3, 1927 through December 7, 2485. The series ends at member 71 as a partial eclipse on June 1, 2774. Its eclipses are tabulated in three columns; every third eclipse in the same column is oneexeligmos apart, so they all cast shadows over approximately the same parts of the Earth.
The longest duration of totality was produced by member 11 at 4 minutes, 10 seconds on August 12, 1692, and the longest duration of annularity will be produced by member 53 at 7 minutes, 35 seconds on November 15, 2449. All eclipses in this series occur at the Moon’sdescending node of orbit.[5]
| Series members 18–39 occur between 1801 and 2200: | ||
|---|---|---|
| 18 | 19 | 20 |
 October 29, 1818 |  November 9, 1836 |  November 20, 1854 |
| 21 | 22 | 23 |
 November 30, 1872 |  December 12, 1890 |  December 23, 1908 |
| 24 | 25 | 26 |
January 3, 1927 |  January 14, 1945 |  January 25, 1963 |
| 27 | 28 | 29 |
 February 4, 1981 |  February 16, 1999 |  February 26, 2017 |
| 30 | 31 | 32 |
 March 9, 2035 |  March 20, 2053 |  March 31, 2071 |
| 33 | 34 | 35 |
 April 10, 2089 |  April 23, 2107 |  May 3, 2125 |
| 36 | 37 | 38 |
 May 14, 2143 |  May 25, 2161 |  June 5, 2179 |
| 39 | ||
 June 15, 2197 | ||
Themetonic series repeats eclipses every 19 years (6939.69 days), lasting about 5 cycles. Eclipses occur in nearly the same calendar date. In addition, the octon subseries repeats 1/5 of that or every 3.8 years (1387.94 days). All eclipses in this table occur at the Moon's descending node.
| 22 eclipse events between March 16, 1866 and August 9, 1953 | ||||
|---|---|---|---|---|
| March 16–17 | January 1–3 | October 20–22 | August 9–10 | May 27–29 |
| 108 | 110 | 112 | 114 | 116 |
 March 16, 1866 |  August 9, 1877 |  May 27, 1881 | ||
| 118 | 120 | 122 | 124 | 126 |
 March 16, 1885 |  January 1, 1889 |  October 20, 1892 |  August 9, 1896 |  May 28, 1900 |
| 128 | 130 | 132 | 134 | 136 |
 March 17, 1904 |  January 3, 1908 |  October 22, 1911 |  August 10, 1915 |  May 29, 1919 |
| 138 | 140 | 142 | 144 | 146 |
 March 17, 1923 | January 3, 1927 |  October 21, 1930 |  August 10, 1934 |  May 29, 1938 |
| 148 | 150 | 152 | 154 | |
 March 16, 1942 |  January 3, 1946 |  October 21, 1949 |  August 9, 1953 | |
This eclipse is a part of atritos cycle, repeating at alternating nodes every 135synodic months (≈ 3986.63 days, or 11 years minus 1 month). Their appearance and longitude are irregular due to a lack of synchronization with theanomalistic month (period of perigee), but groupings of 3 tritos cycles (≈ 33 years minus 3 months) come close (≈ 434.044 anomalistic months), so eclipses are similar in these groupings.
The partial solar eclipses on December 18, 2188 (part of Saros 164) and November 18, 2199 (part of Saros 165) are also a part of this series but are not included in the table below.
| Series members between 1801 and 2134 | ||||
|---|---|---|---|---|
 December 10, 1806 (Saros 129) |  November 9, 1817 (Saros 130) |  October 9, 1828 (Saros 131) |  September 7, 1839 (Saros 132) |  August 7, 1850 (Saros 133) |
 July 8, 1861 (Saros 134) |  June 6, 1872 (Saros 135) |  May 6, 1883 (Saros 136) |  April 6, 1894 (Saros 137) |  March 6, 1905 (Saros 138) |
 February 3, 1916 (Saros 139) | January 3, 1927 (Saros 140) |  December 2, 1937 (Saros 141) |  November 1, 1948 (Saros 142) |  October 2, 1959 (Saros 143) |
 August 31, 1970 (Saros 144) |  July 31, 1981 (Saros 145) |  June 30, 1992 (Saros 146) |  May 31, 2003 (Saros 147) |  April 29, 2014 (Saros 148) |
 March 29, 2025 (Saros 149) |  February 27, 2036 (Saros 150) |  January 26, 2047 (Saros 151) |  December 26, 2057 (Saros 152) |  November 24, 2068 (Saros 153) |
 October 24, 2079 (Saros 154) |  September 23, 2090 (Saros 155) |  August 24, 2101 (Saros 156) |  July 23, 2112 (Saros 157) |  June 23, 2123 (Saros 158) |
 May 23, 2134 (Saros 159) | ||||
This eclipse is a part of the long periodinex cycle, repeating at alternating nodes, every 358synodic months (≈ 10,571.95 days, or 29 years minus 20 days). Their appearance and longitude are irregular due to a lack of synchronization with theanomalistic month (period of perigee). However, groupings of 3 inex cycles (≈ 87 years minus 2 months) comes close (≈ 1,151.02 anomalistic months), so eclipses are similar in these groupings.
| Series members between 1801 and 2200 | ||
|---|---|---|
 March 24, 1811 (Saros 136) |  March 4, 1840 (Saros 137) |  February 11, 1869 (Saros 138) |
 January 22, 1898 (Saros 139) | January 3, 1927 (Saros 140) |  December 14, 1955 (Saros 141) |
 November 22, 1984 (Saros 142) |  November 3, 2013 (Saros 143) |  October 14, 2042 (Saros 144) |
 September 23, 2071 (Saros 145) |  September 4, 2100 (Saros 146) |  August 15, 2129 (Saros 147) |
 July 25, 2158 (Saros 148) |  July 6, 2187 (Saros 149) | |
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