# Solar eclipse of April 6, 1875

A total solar eclipse occurred at the Moon's ascending node of orbit on Tuesday, April 6, 1875, with a magnitude of 1.0547. 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 1.2 days before perigee (on April 7, 1875, at 10:50 UTC), the Moon's apparent diameter was larger.
The path of totality was visible from parts of the modern-day Andaman and Nicobar Islands, Myanmar, Thailand, northwestern Cambodia, Laos, Vietnam, and southern Hainan. A partial solar eclipse was also visible for parts of Southern Africa, South Asia, Southeast Asia, and East Asia.

## Observations

Astronomers J. N. Lockyer and Arthur Schuster traveled to observe the eclipse and measure spectral lines to determine the elemental contents of the solar corona.

## 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.
April 6, 1875 Solar Eclipse Times :
| Event | Time (UTC) |
| First Penumbral External Contact | 1875 April 06 at 03:58:24.3 UTC |
| First Umbral External Contact | 1875 April 06 at 04:53:30.8 UTC |
| First Central Line | 1875 April 06 at 04:54:30.3 UTC |
| First Umbral Internal Contact | 1875 April 06 at 04:55:29.9 UTC |
| First Penumbral Internal Contact | 1875 April 06 at 05:51:22.0 UTC |
| Equatorial Conjunction | 1875 April 06 at 06:30:12.4 UTC |
| Ecliptic Conjunction | 1875 April 06 at 06:36:06.1 UTC |
| Greatest Eclipse | 1875 April 06 at 06:37:26.0 UTC |
| Greatest Duration | 1875 April 06 at 06:41:48.9 UTC |
| Last Penumbral Internal Contact | 1875 April 06 at 07:23:40.2 UTC |
| Last Umbral Internal Contact | 1875 April 06 at 08:19:24.7 UTC |
| Last Central Line | 1875 April 06 at 08:20:25.7 UTC |
| Last Umbral External Contact | 1875 April 06 at 08:21:26.7 UTC |
| Last Penumbral External Contact | 1875 April 06 at 09:16:27.4 UTC |
April 6, 1875 Solar Eclipse Parameters :
| Parameter | Value |
| Eclipse Magnitude | 1.05467 |
| Eclipse Obscuration | 1.11232 |
| Gamma | −0.12915 |
| Sun Right Ascension | 00h59m10.4s |
| Sun Declination | +06°19'21.5" |
| Sun Semi-Diameter | 15'58.4" |
| Sun Equatorial Horizontal Parallax | 08.8" |
| Moon Right Ascension | 00h59m25.4s |
| Moon Declination | +06°12'27.7" |
| Moon Semi-Diameter | 16'33.9" |
| Moon Equatorial Horizontal Parallax | 1°00'47.6" |
| ΔT | -3.3 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 April 1875 :
| April 6, 1875 Ascending node (new moon) | April 20 Descending node (full moon) |
| Total solar eclipse Solar Saros 127 | Penumbral lunar eclipse Lunar Saros 139 |

## Related eclipses
### Eclipses in 1875

* A total solar eclipse on April 6.
* A penumbral lunar eclipse on April 20.
* A penumbral lunar eclipse on September 15.
* An annular solar eclipse on September 29.
* A penumbral lunar eclipse on October 14.

### Metonic

* Preceded by: Solar eclipse of June 18, 1871
* Followed by: Solar eclipse of January 22, 1879

### Tzolkinex

* Preceded by: Solar eclipse of February 23, 1868
* Followed by: Solar eclipse of May 17, 1882

### Half-Saros

* Preceded by: Lunar eclipse of March 31, 1866
* Followed by: Lunar eclipse of April 10, 1884

### Tritos

* Preceded by: Solar eclipse of May 6, 1864
* Followed by: Solar eclipse of March 5, 1886

### Solar Saros 127

* Preceded by: Solar eclipse of March 25, 1857
* Followed by: Solar eclipse of April 16, 1893

### Inex

* Preceded by: Solar eclipse of April 25, 1846
* Followed by: Solar eclipse of March 17, 1904

### Triad

* Preceded by: Solar eclipse of June 4, 1788
* Followed by: Solar eclipse of February 5, 1962

### Solar eclipses of 1874–1877

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 eclipse on August 9, 1877 occurs in the next lunar year eclipse set.
Solar eclipse series sets from 1874 to 1877 :
| Ascending node | Ascending node | Ascending node | Descending node | Descending node | Descending node |
| Saros | Map | Gamma | Saros | Map | Gamma |
| 117 | April 16, 1874 Total | −0.8364 | 122 | October 10, 1874 Annular | 0.9889 |
| 127 | April 6, 1875 Total | −0.1292 | 132 | September 29, 1875 Annular | 0.2427 |
| 137 | March 25, 1876 Annular | 0.6142 | 142 | September 17, 1876 Total | −0.5054 |
| 147 | March 15, 1877 Partial | 1.3924 | 152 | September 7, 1877 Partial | −1.1985 |

### Saros 127

This eclipse is a part of Saros series 127, repeating every 18 years, 11 days, and containing 82 events. The series started with a partial solar eclipse on October 10, 991 AD. It contains total eclipses from May 14, 1352 through August 15, 2091. There are no annular or hybrid eclipses in this set. The series ends at member 82 as a partial eclipse on March 21, 2452. 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 totality was produced by member 31 at 5 minutes, 40 seconds on August 30, 1532. All eclipses in this series occur at the Moon’s ascending node of orbit.
Series members 46–68 occur between 1801 and 2200: :
| 46 | 47 | 48 |
| February 21, 1803 | March 4, 1821 | March 15, 1839 |
| 49 | 50 | 51 |
| March 25, 1857 | April 6, 1875 | April 16, 1893 |
| 52 | 53 | 54 |
| April 28, 1911 | May 9, 1929 | May 20, 1947 |
| 55 | 56 | 57 |
| May 30, 1965 | June 11, 1983 | June 21, 2001 |
| 58 | 59 | 60 |
| July 2, 2019 | July 13, 2037 | July 24, 2055 |
| 61 | 62 | 63 |
| August 3, 2073 | August 15, 2091 | August 26, 2109 |
| 64 | 65 | 66 |
| September 6, 2127 | September 16, 2145 | September 28, 2163 |
| 67 | 68 |
| October 8, 2181 | October 19, 2199 |

### 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 ascending node.
25 eclipse events between April 5, 1837 and June 17, 1928 :
| April 5–6 | January 22–23 | November 10–11 | August 28–30 | June 17–18 |
| 107 | 109 | 111 | 113 | 115 |
| April 5, 1837 | January 22, 1841 | November 10, 1844 | August 28, 1848 | June 17, 1852 |
| 117 | 119 | 121 | 123 | 125 |
| April 5, 1856 | January 23, 1860 | November 11, 1863 | August 29, 1867 | June 18, 1871 |
| 127 | 129 | 131 | 133 | 135 |
| April 6, 1875 | January 22, 1879 | November 10, 1882 | August 29, 1886 | June 17, 1890 |
| 137 | 139 | 141 | 143 | 145 |
| April 6, 1894 | January 22, 1898 | November 11, 1901 | August 30, 1905 | June 17, 1909 |
| 147 | 149 | 151 | 153 | 155 |
| April 6, 1913 | January 23, 1917 | November 10, 1920 | August 30, 1924 | June 17, 1928 |

### 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 :
| October 9, 1809 (Saros 121) | September 7, 1820 (Saros 122) | August 7, 1831 (Saros 123) | July 8, 1842 (Saros 124) | June 6, 1853 (Saros 125) |
| May 6, 1864 (Saros 126) | April 6, 1875 (Saros 127) | March 5, 1886 (Saros 128) | February 1, 1897 (Saros 129) | January 3, 1908 (Saros 130) |
| December 3, 1918 (Saros 131) | November 1, 1929 (Saros 132) | October 1, 1940 (Saros 133) | September 1, 1951 (Saros 134) | July 31, 1962 (Saros 135) |
| June 30, 1973 (Saros 136) | May 30, 1984 (Saros 137) | April 29, 1995 (Saros 138) | March 29, 2006 (Saros 139) | February 26, 2017 (Saros 140) |
| January 26, 2028 (Saros 141) | December 26, 2038 (Saros 142) | November 25, 2049 (Saros 143) | October 24, 2060 (Saros 144) | September 23, 2071 (Saros 145) |
| August 24, 2082 (Saros 146) | July 23, 2093 (Saros 147) | June 22, 2104 (Saros 148) | May 24, 2115 (Saros 149) | April 22, 2126 (Saros 150) |
| March 21, 2137 (Saros 151) | February 19, 2148 (Saros 152) | January 19, 2159 (Saros 153) | December 18, 2169 (Saros 154) | November 17, 2180 (Saros 155) |
| October 18, 2191 (Saros 156) |

### 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 :
| May 16, 1817 (Saros 125) | April 25, 1846 (Saros 126) | April 6, 1875 (Saros 127) |
| March 17, 1904 (Saros 128) | February 24, 1933 (Saros 129) | February 5, 1962 (Saros 130) |
| January 15, 1991 (Saros 131) | December 26, 2019 (Saros 132) | December 5, 2048 (Saros 133) |
| November 15, 2077 (Saros 134) | October 26, 2106 (Saros 135) | October 7, 2135 (Saros 136) |
| September 16, 2164 (Saros 137) | August 26, 2193 (Saros 138) | |