# April 1948 lunar eclipse

A partial lunar eclipse occurred at the Moon’s descending node of orbit on Friday, April 23, 1948, with an umbral magnitude of 0.0230. 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. Occurring about 3.5 days after perigee (on April 20, 1948, at 2:05 UTC), the Moon's apparent diameter was larger.

## Visibility

The eclipse was completely visible over east and northeast Asia, Australia, and Antarctica, seen rising over east Africa and the western half of Asia and setting over western North America and the eastern Pacific Ocean.

## Eclipse details

Shown below is a table displaying details about this particular solar eclipse. It describes various parameters pertaining to this eclipse.
April 23, 1948 Lunar Eclipse Parameters :
| Parameter | Value |
| Penumbral Magnitude | 1.01720 |
| Umbral Magnitude | 0.02300 |
| Gamma | 1.00165 |
| Sun Right Ascension | 02h04m17.6s |
| Sun Declination | +12°37'06.8" |
| Sun Semi-Diameter | 15'54.1" |
| Sun Equatorial Horizontal Parallax | 08.7" |
| Moon Right Ascension | 14h06m01.0s |
| Moon Declination | -11°44'01.4" |
| Moon Semi-Diameter | 15'59.7" |
| Moon Equatorial Horizontal Parallax | 0°58'42.0" |
| ΔT | 28.4 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–May 1948 :
| April 23 Descending node (full moon) | May 9 Ascending node (new moon) |
| Partial lunar eclipse Lunar Saros 111 | Annular solar eclipse Solar Saros 137 |

## Related eclipses
### Eclipses in 1948

* A partial lunar eclipse on April 23.
* An annular solar eclipse on May 9.
* A penumbral lunar eclipse on October 18.
* A total solar eclipse on November 1.

### Metonic

* Preceded by: Lunar eclipse of July 6, 1944
* Followed by: Lunar eclipse of February 11, 1952

### Tzolkinex

* Preceded by: Lunar eclipse of March 13, 1941
* Followed by: Lunar eclipse of June 5, 1955

### Half-Saros

* Preceded by: Solar eclipse of April 19, 1939
* Followed by: Solar eclipse of April 30, 1957

### Tritos

* Preceded by: Lunar eclipse of May 25, 1937
* Followed by: Lunar eclipse of March 24, 1959

### Lunar Saros 111

* Preceded by: Lunar eclipse of April 13, 1930
* Followed by: Lunar eclipse of May 4, 1966

### Inex

* Preceded by: Lunar eclipse of May 15, 1919
* Followed by: Lunar eclipse of April 4, 1977

### Triad

* Preceded by: Lunar eclipse of June 22, 1861
* Followed by: Lunar eclipse of February 22, 2035

### Lunar eclipses of 1948–1951

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 eclipses on February 21, 1951 and August 17, 1951 occur in the next lunar year eclipse set.
Lunar eclipse series sets from 1948 to 1951 :
| Descending node | Descending node | Descending node | Descending node | Ascending node | Ascending node | Ascending node | Ascending node |
| Saros | Date Viewing | Type Chart | Gamma | Saros | Date Viewing | Type Chart | Gamma |
| 111 | 1948 Apr 23 | Partial | 1.0017 | 116 | 1948 Oct 18 | Penumbral | −1.0245 |
| 121 | 1949 Apr 13 | Total | 0.2474 | 126 | 1949 Oct 07 | Total | −0.3219 |
| 131 | 1950 Apr 02 | Total | −0.4599 | 136 | 1950 Sep 26 | Total | 0.4101 |
| 141 | 1951 Mar 23 | Penumbral | −1.2099 | 146 | 1951 Sep 15 | Penumbral | 1.1187 |

### Saros 111

This eclipse is a part of Saros series 111, repeating every 18 years, 11 days, and containing 71 events. The series started with a penumbral lunar eclipse on June 10, 830 AD. It contains partial eclipses from September 14, 992 AD through April 8, 1335; total eclipses from April 19, 1353 through August 4, 1533; and a second set of partial eclipses from August 16, 1551 through April 23, 1948. The series ends at member 71 as a penumbral eclipse on July 19, 2092.
The longest duration of totality was produced by member 35 at 106 minutes, 14 seconds on June 12, 1443. All eclipses in this series occur at the Moon’s descending node of orbit.
| Greatest | First | First | First | First |
| The greatest eclipse of the series occurred on 1443 Jun 12, lasting 106 minutes, 14 seconds. | Penumbral | Partial | Total | Central |
| The greatest eclipse of the series occurred on 1443 Jun 12, lasting 106 minutes, 14 seconds. | 830 Jun 10 | 992 Sep 14 | 1353 Apr 19 | 1389 May 10 |
| Last ||||
| The greatest eclipse of the series occurred on 1443 Jun 12, lasting 106 minutes, 14 seconds. | Central | Total | Partial | Penumbral |
| The greatest eclipse of the series occurred on 1443 Jun 12, lasting 106 minutes, 14 seconds. | 1497 Jul 14 | 1533 Aug 04 | 1948 Apr 23 | 2092 Jul 19 |
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 55–71 occur between 1801 and 2092: :
| 55 | 55 | 56 | 56 | 57 | 57 |
| 1804 Jan 26 | 1804 Jan 26 | 1822 Feb 06 | 1822 Feb 06 | 1840 Feb 17 | 1840 Feb 17 |
| 58 | 58 | 59 | 59 | 60 | 60 |
| 1858 Feb 27 | 1858 Feb 27 | 1876 Mar 10 | 1876 Mar 10 | 1894 Mar 21 | 1894 Mar 21 |
| 61 | 61 | 62 | 62 | 63 | 63 |
| 1912 Apr 01 | 1912 Apr 01 | 1930 Apr 13 | 1930 Apr 13 | 1948 Apr 23 | 1948 Apr 23 |
| 64 | 64 | 65 | 65 | 66 | 66 |
| 1966 May 04 | 1966 May 04 | 1984 May 15 | 1984 May 15 | 2002 May 26 | 2002 May 26 |
| 67 | 67 | 68 | 68 | 69 | 69 |
| 2020 Jun 05 | 2020 Jun 05 | 2038 Jun 17 | 2038 Jun 17 | 2056 Jun 27 | 2056 Jun 27 |
| 70 | 70 | 71 | 71 |
| 2074 Jul 08 | 2074 Jul 08 | 2092 Jul 19 | 2092 Jul 19 |

### 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 1817 and 2200 :
| 1817 May 01 (Saros 99) | 1817 May 01 (Saros 99) | 1828 Mar 31 (Saros 100) | 1828 Mar 31 (Saros 100) | 1839 Feb 28 (Saros 101) | 1839 Feb 28 (Saros 101) | 1850 Jan 28 (Saros 102) | 1850 Jan 28 (Saros 102) | 1860 Dec 28 (Saros 103) | 1860 Dec 28 (Saros 103) |
| | | | | 1893 Sep 25 (Saros 106) | 1893 Sep 25 (Saros 106) | | | 1915 Jul 26 (Saros 108) | 1915 Jul 26 (Saros 108) |
| 1926 Jun 25 (Saros 109) | 1926 Jun 25 (Saros 109) | 1937 May 25 (Saros 110) | 1937 May 25 (Saros 110) | 1948 Apr 23 (Saros 111) | 1948 Apr 23 (Saros 111) | 1959 Mar 24 (Saros 112) | 1959 Mar 24 (Saros 112) | 1970 Feb 21 (Saros 113) | 1970 Feb 21 (Saros 113) |
| 1981 Jan 20 (Saros 114) | 1981 Jan 20 (Saros 114) | 1991 Dec 21 (Saros 115) | 1991 Dec 21 (Saros 115) | 2002 Nov 20 (Saros 116) | 2002 Nov 20 (Saros 116) | 2013 Oct 18 (Saros 117) | 2013 Oct 18 (Saros 117) | 2024 Sep 18 (Saros 118) | 2024 Sep 18 (Saros 118) |
| 2035 Aug 19 (Saros 119) | 2035 Aug 19 (Saros 119) | 2046 Jul 18 (Saros 120) | 2046 Jul 18 (Saros 120) | 2057 Jun 17 (Saros 121) | 2057 Jun 17 (Saros 121) | 2068 May 17 (Saros 122) | 2068 May 17 (Saros 122) | 2079 Apr 16 (Saros 123) | 2079 Apr 16 (Saros 123) |
| 2090 Mar 15 (Saros 124) | 2090 Mar 15 (Saros 124) | 2101 Feb 14 (Saros 125) | 2101 Feb 14 (Saros 125) | 2112 Jan 14 (Saros 126) | 2112 Jan 14 (Saros 126) | 2122 Dec 13 (Saros 127) | 2122 Dec 13 (Saros 127) | 2133 Nov 12 (Saros 128) | 2133 Nov 12 (Saros 128) |
| 2144 Oct 11 (Saros 129) | 2144 Oct 11 (Saros 129) | 2155 Sep 11 (Saros 130) | 2155 Sep 11 (Saros 130) | 2166 Aug 11 (Saros 131) | 2166 Aug 11 (Saros 131) | 2177 Jul 11 (Saros 132) | 2177 Jul 11 (Saros 132) | 2188 Jun 09 (Saros 133) | 2188 Jun 09 (Saros 133) |
| 2199 May 10 (Saros 134) ||

### 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 :
| 1803 Aug 03 (Saros 106) | 1803 Aug 03 (Saros 106) | 1832 Jul 12 (Saros 107) | 1832 Jul 12 (Saros 107) | 1861 Jun 22 (Saros 108) | 1861 Jun 22 (Saros 108) |
| 1890 Jun 03 (Saros 109) | 1890 Jun 03 (Saros 109) | 1919 May 15 (Saros 110) | 1919 May 15 (Saros 110) | 1948 Apr 23 (Saros 111) | 1948 Apr 23 (Saros 111) |
| 1977 Apr 04 (Saros 112) | 1977 Apr 04 (Saros 112) | 2006 Mar 14 (Saros 113) | 2006 Mar 14 (Saros 113) | 2035 Feb 22 (Saros 114) | 2035 Feb 22 (Saros 114) |
| 2064 Feb 02 (Saros 115) | 2064 Feb 02 (Saros 115) | 2093 Jan 12 (Saros 116) | 2093 Jan 12 (Saros 116) | 2121 Dec 24 (Saros 117) | 2121 Dec 24 (Saros 117) |
| 2150 Dec 04 (Saros 118) | 2150 Dec 04 (Saros 118) | 2179 Nov 14 (Saros 119) | 2179 Nov 14 (Saros 119) |

### 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 annular solar eclipses of Solar Saros 118.
| April 19, 1939 | April 30, 1957 |