# Solar eclipse of January 24, 1925

A total solar eclipse occurred at the Moon's descending node of orbit on Saturday, January 24, 1925, with a magnitude of 1.0304. A solar eclipse occurs when the Moon passes between Earth and the Sun, thereby totally or partly obscuring the image of the Sun for a viewer on Earth. A total solar eclipse occurs when the Moon's apparent diameter is larger than the Sun's, blocking all direct sunlight, turning day into darkness. Totality occurs in a narrow path across Earth's surface, with the partial solar eclipse visible over a surrounding region thousands of kilometres wide. Occurring about 1.1 days after perigee (on January 23, 1925, at 13:30 UTC), the Moon's apparent diameter was larger.
Totality was visible from southwestern and southeastern Ontario in Canada (including Toronto and Niagara Falls), Minnesota, Wisconsin, Michigan, Pennsylvania, New York (including the northern part of New York City), New Jersey, Connecticut, Rhode Island, and Massachusetts. A partial eclipse was visible for parts of North America, Central America, the Caribbean, northern South America, West Africa, and Western Europe.

## Observations

It was seen in New York City. It was reported that those north of 96th Street in Manhattan saw a total solar eclipse while those south of 96th Street saw a partial eclipse.
Visual and radio observations were conducted by researchers working with Scientific American.

## Eclipse details

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.
January 24, 1925 Solar Eclipse Times :
| Event | Time (UTC) |
| First Penumbral External Contact | 1925 January 24 at 12:41:48.8 UTC |
| First Umbral External Contact | 1925 January 24 at 14:01:18.9 UTC |
| First Central Line | 1925 January 24 at 14:02:31.1 UTC |
| First Umbral Internal Contact | 1925 January 24 at 14:03:44.6 UTC |
| Ecliptic Conjunction | 1925 January 24 at 14:45:16.3 UTC |
| Greatest Duration | 1925 January 24 at 14:53:02.2 UTC |
| Greatest Eclipse | 1925 January 24 at 14:54:03.1 UTC |
| Equatorial Conjunction | 1925 January 24 at 15:06:52.3 UTC |
| Last Umbral Internal Contact | 1925 January 24 at 15:44:13.9 UTC |
| Last Central Line | 1925 January 24 at 15:45:26.2 UTC |
| Last Umbral External Contact | 1925 January 24 at 15:46:37.2 UTC |
| Last Penumbral External Contact | 1925 January 24 at 17:06:14.1 UTC |
January 24, 1925 Solar Eclipse Parameters :
| Parameter | Value |
| Eclipse Magnitude | 1.03044 |
| Eclipse Obscuration | 1.06180 |
| Gamma | 0.86613 |
| Sun Right Ascension | 20h25m51.5s |
| Sun Declination | -19°13'44.3" |
| Sun Semi-Diameter | 16'14.7" |
| Sun Equatorial Horizontal Parallax | 08.9" |
| Moon Right Ascension | 20h25m20.3s |
| Moon Declination | -18°21'36.7" |
| Moon Semi-Diameter | 16'36.2" |
| Moon Equatorial Horizontal Parallax | 1°00'56.2" |
| ΔT | 23.6 s |

## Eclipse season

This eclipse is part of an eclipse 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 a fortnight.
Eclipse season of January–February 1925 :
| January 24 Descending node (new moon) | February 8 Ascending node (full moon) |
| Annular solar eclipse Solar Saros 120 | Penumbral lunar eclipse Lunar Saros 132 |

## Related eclipses
### Eclipses in 1925

* A total solar eclipse on January 24.
* A partial lunar eclipse on February 8.
* An annular solar eclipse on July 20.
* A partial lunar eclipse on August 4.

### Metonic

* Preceded by: Solar eclipse of April 8, 1921
* Followed by: Solar eclipse of November 12, 1928

### Tzolkinex

* Preceded by: Solar eclipse of December 14, 1917
* Followed by: Solar eclipse of March 7, 1932

### Half-Saros

* Preceded by: Lunar eclipse of January 20, 1916
* Followed by: Lunar eclipse of January 30, 1934

### Tritos

* Preceded by: Solar eclipse of February 25, 1914
* Followed by: Solar eclipse of December 25, 1935

### Solar Saros 120

* Preceded by: Solar eclipse of January 14, 1907
* Followed by: Solar eclipse of February 4, 1943

### Inex

* Preceded by: Solar eclipse of February 13, 1896
* Followed by: Solar eclipse of January 5, 1954

### Triad

* Preceded by: Solar eclipse of March 25, 1838
* Followed by: Solar eclipse of November 25, 2011

### Solar eclipses of 1924–1928

This eclipse is a member of a semester series. An eclipse in a semester series of solar eclipses repeats approximately every 177 days and 4 hours (a semester) at alternating nodes of the Moon's orbit.
The partial solar eclipses on March 5, 1924 and August 30, 1924 occur in the previous lunar year eclipse set, and the solar eclipses on May 19, 1928 and November 12, 1928 occur in the next lunar year eclipse set.
Solar eclipse series sets from 1924 to 1928 :
| Ascending node | Ascending node | Ascending node | Descending node | Descending 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 in Sumatra, 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 |

### Saros 120

This eclipse is a part of Saros series 120, repeating every 18 years, 11 days, and containing 71 events. The series started with a partial solar eclipse on May 27, 933 AD. It contains annular eclipses from August 11, 1059 through April 26, 1492; hybrid eclipses from May 8, 1510 through June 8, 1564; and total eclipses from June 20, 1582 through March 30, 2033. The series ends at member 71 as a partial eclipse on July 7, 2195. Its eclipses are tabulated in three columns; every third eclipse in the same column is one exeligmos apart, so they all cast shadows over approximately the same parts of the Earth.
The longest duration of annularity was produced by member 11 at 6 minutes, 24 seconds on September 11, 1113, and the longest duration of totality was produced by member 60 at 2 minutes, 50 seconds on March 9, 1997. All eclipses in this series occur at the Moon’s descending node of orbit.
Series members 50–71 occur between 1801 and 2195: :
| 50 | 51 | 52 |
| November 19, 1816 | November 30, 1834 | December 11, 1852 |
| 53 | 54 | 55 |
| December 22, 1870 | January 1, 1889 | January 14, 1907 |
| 56 | 57 | 58 |
| January 24, 1925 | February 4, 1943 | February 15, 1961 |
| 59 | 60 | 61 |
| February 26, 1979 | March 9, 1997 | March 20, 2015 |
| 62 | 63 | 64 |
| March 30, 2033 | April 11, 2051 | April 21, 2069 |
| 65 | 66 | 67 |
| May 2, 2087 | May 14, 2105 | May 25, 2123 |
| 68 | 69 | 70 |
| June 4, 2141 | June 16, 2159 | June 26, 2177 |
| 71 |
| July 7, 2195 |

### Metonic series

The metonic 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 April 8, 1902 and August 31, 1989 :
| April 7–8 | January 24–25 | November 12 | August 31–September 1 | June 19–20 |
| 108 | 110 | 112 | 114 | 116 |
| April 8, 1902 | | | August 31, 1913 | June 19, 1917 |
| 118 | 120 | 122 | 124 | 126 |
| April 8, 1921 | January 24, 1925 | November 12, 1928 | August 31, 1932 | June 19, 1936 |
| 128 | 130 | 132 | 134 | 136 |
| April 7, 1940 | January 25, 1944 | November 12, 1947 | September 1, 1951 | June 20, 1955 |
| 138 | 140 | 142 | 144 | 146 |
| April 8, 1959 | January 25, 1963 | November 12, 1966 | August 31, 1970 | June 20, 1974 |
| 148 | 150 | 152 | 154 |
| April 7, 1978 | January 25, 1982 | November 12, 1985 | August 31, 1989 |

### Tritos series

This eclipse is a part of a tritos cycle, repeating at alternating nodes every 135 synodic months (≈ 3986.63 days, or 11 years minus 1 month). Their appearance and longitude are irregular due to a lack of synchronization with the anomalistic 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.
Series members between 1801 and 2200 :
| January 1, 1805 (Saros 109) | | October 31, 1826 (Saros 111) | | August 28, 1848 (Saros 113) |
| July 29, 1859 (Saros 114) | June 28, 1870 (Saros 115) | May 27, 1881 (Saros 116) | April 26, 1892 (Saros 117) | March 29, 1903 (Saros 118) |
| February 25, 1914 (Saros 119) | January 24, 1925 (Saros 120) | December 25, 1935 (Saros 121) | November 23, 1946 (Saros 122) | October 23, 1957 (Saros 123) |
| September 22, 1968 (Saros 124) | August 22, 1979 (Saros 125) | July 22, 1990 (Saros 126) | June 21, 2001 (Saros 127) | May 20, 2012 (Saros 128) |
| April 20, 2023 (Saros 129) | March 20, 2034 (Saros 130) | February 16, 2045 (Saros 131) | January 16, 2056 (Saros 132) | December 17, 2066 (Saros 133) |
| November 15, 2077 (Saros 134) | October 14, 2088 (Saros 135) | September 14, 2099 (Saros 136) | August 15, 2110 (Saros 137) | July 14, 2121 (Saros 138) |
| June 13, 2132 (Saros 139) | May 14, 2143 (Saros 140) | April 12, 2154 (Saros 141) | March 12, 2165 (Saros 142) | February 10, 2176 (Saros 143) |
| January 9, 2187 (Saros 144) | December 9, 2197 (Saros 145) |

### Inex series

This eclipse is a part of the long period inex cycle, repeating at alternating nodes, every 358 synodic months (≈ 10,571.95 days, or 29 years minus 20 days). Their appearance and longitude are irregular due to a lack of synchronization with the anomalistic 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 :
| April 14, 1809 (Saros 116) | March 25, 1838 (Saros 117) | March 6, 1867 (Saros 118) |
| February 13, 1896 (Saros 119) | January 24, 1925 (Saros 120) | January 5, 1954 (Saros 121) |
| December 15, 1982 (Saros 122) | November 25, 2011 (Saros 123) | November 4, 2040 (Saros 124) |
| October 15, 2069 (Saros 125) | September 25, 2098 (Saros 126) | September 6, 2127 (Saros 127) |
| August 16, 2156 (Saros 128) | July 26, 2185 (Saros 129) | |