# April 1903 lunar eclipse

A partial lunar eclipse occurred at the Moon’s ascending node of orbit on Sunday, April 12, 1903, with an umbral magnitude of 0.9677. A lunar eclipse occurs when the Moon moves into the Earth's shadow, causing the Moon to be darkened. A partial lunar eclipse occurs when one part of the Moon is in the Earth's umbra, while the other part is in the Earth's penumbra. Unlike a solar eclipse, which can only be viewed from a relatively small area of the world, a lunar eclipse may be viewed from anywhere on the night side of Earth. The Moon's apparent diameter was near the average diameter because it occurred 6.2 days after perigee (on April 5, 1903, at 18:45 UTC) and 7.1 days before apogee (on April 19, 1903, at 4:35 UTC).
This nearly total lunar eclipse of Lunar Saros 130 preceded the first total eclipse of the series on April 22, 1921.
It occurred on Easter Sunday (Gregorian only), for the first time since 1846.$^{:152}$

## Visibility

The eclipse was completely visible over eastern South America, Africa, Europe, and Antarctica, seen rising over western South America and much of North America and setting over much of Asia and western Australia.

## Eclipse details

Shown below is a table displaying details about this particular solar eclipse. It describes various parameters pertaining to this eclipse.
April 12, 1903 Lunar Eclipse Parameters :
| Parameter | Value |
| Penumbral Magnitude | 1.98771 |
| Umbral Magnitude | 0.96765 |
| Gamma | 0.47981 |
| Sun Right Ascension | 01h17m19.0s |
| Sun Declination | +08°10'13.1" |
| Sun Semi-Diameter | 15'57.3" |
| Sun Equatorial Horizontal Parallax | 08.8" |
| Moon Right Ascension | 13h17m50.3s |
| Moon Declination | -07°43'47.7" |
| Moon Semi-Diameter | 15'38.4" |
| Moon Equatorial Horizontal Parallax | 0°57'24.1" |
| ΔT | 1.6 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 March–April 1903 :
| March 29 Descending node (new moon) | April 12 Ascending node (full moon) |
| Annular solar eclipse Solar Saros 118 | Partial lunar eclipse Lunar Saros 130 |

## Related eclipses
### Eclipses in 1903

* An annular solar eclipse on March 29.
* A partial lunar eclipse on April 12.
* A total solar eclipse on September 21.
* A partial lunar eclipse on October 6.

### Metonic

* Preceded by: Lunar eclipse of June 23, 1899
* Followed by: Lunar eclipse of January 29, 1907

### Tzolkinex

* Preceded by: Lunar eclipse of February 28, 1896
* Followed by: Lunar eclipse of May 24, 1910

### Half-Saros

* Preceded by: Solar eclipse of April 6, 1894
* Followed by: Solar eclipse of April 17, 1912

### Tritos

* Preceded by: Lunar eclipse of May 11, 1892
* Followed by: Lunar eclipse of March 12, 1914

### Lunar Saros 130

* Preceded by: Lunar eclipse of March 30, 1885
* Followed by: Lunar eclipse of April 22, 1921

### Inex

* Preceded by: Lunar eclipse of May 1, 1874
* Followed by: Lunar eclipse of March 22, 1932

### Triad

* Preceded by: Lunar eclipse of June 10, 1816
* Followed by: Lunar eclipse of February 9, 1990

### Lunar eclipses of 1901–1904

This eclipse is a member of a semester series. An eclipse in a semester series of lunar eclipses repeats approximately every 177 days and 4 hours (a semester) at alternating nodes of the Moon's orbit.
The penumbral lunar eclipse on March 2, 1904 occurs in the next lunar year eclipse set.
Lunar eclipse series sets from 1901 to 1904 :
| Ascending node | Ascending node | Ascending node | Ascending node | Descending node | Descending node | Descending node | Descending node |
| Saros | Date Viewing | Type Chart | Gamma | Saros | Date Viewing | Type Chart | Gamma |
| 110 | 1901 May 03 | Penumbral | −1.0101 | 115 | 1901 Oct 27 | Partial | 0.9021 |
| 120 | 1902 Apr 22 | Total | −0.2680 | 125 | 1902 Oct 17 | Total | 0.2201 |
| 130 | 1903 Apr 12 | Partial | 0.4798 | 135 | 1903 Oct 06 | Partial | −0.5280 |
| 140 | 1904 Mar 31 | Penumbral | 1.1665 | 145 | 1904 Sep 24 | Penumbral | −1.2837 |

### Saros 130

This eclipse is a part of Saros series 130, repeating every 18 years, 11 days, and containing 71 events. The series started with a penumbral lunar eclipse on June 10, 1416. It contains partial eclipses from September 4, 1560 through April 12, 1903; total eclipses from April 22, 1921 through September 11, 2155; and a second set of partial eclipses from September 21, 2173 through May 10, 2552. The series ends at member 71 as a penumbral eclipse on July 26, 2678.
The longest duration of totality will be produced by member 35 at 101 minutes, 53 seconds on June 26, 2029. All eclipses in this series occur at the Moon’s ascending node of orbit.
| Greatest | First | First | First | First |
| The greatest eclipse of the series will occur on 2029 Jun 26, lasting 101 minutes, 53 seconds. | Penumbral | Partial | Total | Central |
| The greatest eclipse of the series will occur on 2029 Jun 26, lasting 101 minutes, 53 seconds. | 1416 Jun 10 | 1560 Sep 04 | 1921 Apr 22 | 1975 May 25 |
| Last ||||
| The greatest eclipse of the series will occur on 2029 Jun 26, lasting 101 minutes, 53 seconds. | Central | Total | Partial | Penumbral |
| The greatest eclipse of the series will occur on 2029 Jun 26, lasting 101 minutes, 53 seconds. | 2083 Jul 29 | 2155 Sep 11 | 2552 May 10 | 2678 Jul 26 |
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.
Series members 23–44 occur between 1801 and 2200: :
| 23 | 23 | 24 | 24 | 25 | 25 |
| 1813 Feb 15 | 1813 Feb 15 | 1831 Feb 26 | 1831 Feb 26 | 1849 Mar 09 | 1849 Mar 09 |
| 26 | 26 | 27 | 27 | 28 | 28 |
| 1867 Mar 20 | 1867 Mar 20 | 1885 Mar 30 | 1885 Mar 30 | 1903 Apr 12 | 1903 Apr 12 |
| 29 | 29 | 30 | 30 | 31 | 31 |
| 1921 Apr 22 | 1921 Apr 22 | 1939 May 03 | 1939 May 03 | 1957 May 13 | 1957 May 13 |
| 32 | 32 | 33 | 33 | 34 | 34 |
| 1975 May 25 | 1975 May 25 | 1993 Jun 04 | 1993 Jun 04 | 2011 Jun 15 | 2011 Jun 15 |
| 35 | 35 | 36 | 36 | 37 | 37 |
| 2029 Jun 26 | 2029 Jun 26 | 2047 Jul 07 | 2047 Jul 07 | 2065 Jul 17 | 2065 Jul 17 |
| 38 | 38 | 39 | 39 | 40 | 40 |
| 2083 Jul 29 | 2083 Jul 29 | 2101 Aug 09 | 2101 Aug 09 | 2119 Aug 20 | 2119 Aug 20 |
| 41 | 41 | 42 | 42 | 43 | 43 |
| 2137 Aug 30 | 2137 Aug 30 | 2155 Sep 11 | 2155 Sep 11 | 2173 Sep 21 | 2173 Sep 21 |
| 44 ||
| 2191 Oct 02 ||

### 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 2187 :
| 1805 Jan 15 (Saros 121) | 1805 Jan 15 (Saros 121) | 1815 Dec 16 (Saros 122) | 1815 Dec 16 (Saros 122) | 1826 Nov 14 (Saros 123) | 1826 Nov 14 (Saros 123) | 1837 Oct 13 (Saros 124) | 1837 Oct 13 (Saros 124) | 1848 Sep 13 (Saros 125) | 1848 Sep 13 (Saros 125) |
| 1859 Aug 13 (Saros 126) | 1859 Aug 13 (Saros 126) | 1870 Jul 12 (Saros 127) | 1870 Jul 12 (Saros 127) | 1881 Jun 12 (Saros 128) | 1881 Jun 12 (Saros 128) | 1892 May 11 (Saros 129) | 1892 May 11 (Saros 129) | 1903 Apr 12 (Saros 130) | 1903 Apr 12 (Saros 130) |
| 1914 Mar 12 (Saros 131) | 1914 Mar 12 (Saros 131) | 1925 Feb 08 (Saros 132) | 1925 Feb 08 (Saros 132) | 1936 Jan 08 (Saros 133) | 1936 Jan 08 (Saros 133) | 1946 Dec 08 (Saros 134) | 1946 Dec 08 (Saros 134) | 1957 Nov 07 (Saros 135) | 1957 Nov 07 (Saros 135) |
| 1968 Oct 06 (Saros 136) | 1968 Oct 06 (Saros 136) | 1979 Sep 06 (Saros 137) | 1979 Sep 06 (Saros 137) | 1990 Aug 06 (Saros 138) | 1990 Aug 06 (Saros 138) | 2001 Jul 05 (Saros 139) | 2001 Jul 05 (Saros 139) | 2012 Jun 04 (Saros 140) | 2012 Jun 04 (Saros 140) |
| 2023 May 05 (Saros 141) | 2023 May 05 (Saros 141) | 2034 Apr 03 (Saros 142) | 2034 Apr 03 (Saros 142) | 2045 Mar 03 (Saros 143) | 2045 Mar 03 (Saros 143) | 2056 Feb 01 (Saros 144) | 2056 Feb 01 (Saros 144) | 2066 Dec 31 (Saros 145) | 2066 Dec 31 (Saros 145) |
| 2077 Nov 29 (Saros 146) | 2077 Nov 29 (Saros 146) | 2088 Oct 30 (Saros 147) | 2088 Oct 30 (Saros 147) | 2099 Sep 29 (Saros 148) | 2099 Sep 29 (Saros 148) | 2110 Aug 29 (Saros 149) | 2110 Aug 29 (Saros 149) | 2121 Jul 30 (Saros 150) | 2121 Jul 30 (Saros 150) |
| 2132 Jun 28 (Saros 151) | 2132 Jun 28 (Saros 151) | 2143 May 28 (Saros 152) | 2143 May 28 (Saros 152) | 2154 Apr 28 (Saros 153) | 2154 Apr 28 (Saros 153) | | | | |
| 2187 Jan 24 (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 :
| 1816 Jun 10 (Saros 127) | 1816 Jun 10 (Saros 127) | 1845 May 21 (Saros 128) | 1845 May 21 (Saros 128) | 1874 May 01 (Saros 129) | 1874 May 01 (Saros 129) |
| 1903 Apr 12 (Saros 130) | 1903 Apr 12 (Saros 130) | 1932 Mar 22 (Saros 131) | 1932 Mar 22 (Saros 131) | 1961 Mar 02 (Saros 132) | 1961 Mar 02 (Saros 132) |
| 1990 Feb 09 (Saros 133) | 1990 Feb 09 (Saros 133) | 2019 Jan 21 (Saros 134) | 2019 Jan 21 (Saros 134) | 2048 Jan 01 (Saros 135) | 2048 Jan 01 (Saros 135) |
| 2076 Dec 10 (Saros 136) | 2076 Dec 10 (Saros 136) | 2105 Nov 21 (Saros 137) | 2105 Nov 21 (Saros 137) | 2134 Nov 02 (Saros 138) | 2134 Nov 02 (Saros 138) |
| 2163 Oct 12 (Saros 139) | 2163 Oct 12 (Saros 139) | 2192 Sep 21 (Saros 140) | 2192 Sep 21 (Saros 140) |

### Half-Saros cycle

A lunar eclipse will be preceded and followed by solar eclipses by 9 years and 5.5 days (a half saros). This lunar eclipse is related to two hybrid solar eclipses of Solar Saros 137.
| April 6, 1894 | April 17, 1912 |