# October 2023 lunar eclipse

A partial lunar eclipse occurred at the Moon’s ascending node of orbit on Saturday, October 28, 2023, with an umbral magnitude of 0.1234. 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 2.9 days after perigee (on October 25, 2023, at 23:00 UTC), the Moon's apparent diameter was larger.

## Visibility

The eclipse was completely visible over Africa, Europe, and Asia, seen rising over northeastern North America and eastern South America and setting over Australia and the western Pacific Ocean.
* Visibility map

## Gallery

* Logroño, Spain, 20:08 UTC
* Lunar eclipse in Saratov, Russia, 20:12 UTC
* Surabaya, Indonesia, 20:14 UTC
* Lunar eclipse in Vladivostok, Russia, 20:15 UTC
* Lunar eclipse in Hefei, China, 20:17 UTC
* Partial from Kumbakonam, India, 20:21 UTC
* Jakarta, Indonesia, 20:23 UTC
* Kuching, Malaysia, 19:35 UTC-20:14 UTC
* Sequence of lunar eclipse from Oria, Italy

## Eclipse details

Shown below is a table displaying details about this particular solar eclipse. It describes various parameters pertaining to this eclipse.
October 28, 2023 Lunar Eclipse Parameters :
| Parameter | Value |
| Penumbral Magnitude | 1.11997 |
| Umbral Magnitude | 0.12393 |
| Gamma | 0.94716 |
| Sun Right Ascension | 14h11m25.9s |
| Sun Declination | -13°14'10.5" |
| Sun Semi-Diameter | 16'05.9" |
| Sun Equatorial Horizontal Parallax | 08.9" |
| Moon Right Ascension | 02h09m47.6s |
| Moon Declination | +14°05'01.6" |
| Moon Semi-Diameter | 16'09.7" |
| Moon Equatorial Horizontal Parallax | 0°59'18.9" |
| ΔT | 71.1 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 October 2023 :
| October 14 Descending node (new moon) | October 28 Ascending node (full moon) |
| Annular solar eclipse Solar Saros 134 | Partial lunar eclipse Lunar Saros 146 |

## Related eclipses
### Eclipses in 2023

* A hybrid solar eclipse on April 20.
* A penumbral lunar eclipse on May 5.
* An annular solar eclipse on October 14.
* A partial lunar eclipse on October 28.

### Metonic

* Preceded by: Lunar eclipse of January 10, 2020
* Followed by: Lunar eclipse of August 17, 2027

### Tzolkinex

* Preceded by: Lunar eclipse of September 16, 2016
* Followed by: Lunar eclipse of December 9, 2030

### Half-Saros

* Preceded by: Solar eclipse of October 23, 2014
* Followed by: Solar eclipse of November 3, 2032

### Tritos

* Preceded by: Lunar eclipse of November 28, 2012
* Followed by: Lunar eclipse of September 28, 2034

### Lunar Saros 146

* Preceded by: Lunar eclipse of October 17, 2005
* Followed by: Lunar eclipse of November 8, 2041

### Inex

* Preceded by: Lunar eclipse of November 18, 1994
* Followed by: Lunar eclipse of October 8, 2052

### Triad

* Preceded by: Lunar eclipse of December 28, 1936
* Followed by: Lunar eclipse of August 29, 2110

### Lunar eclipses of 2020–2023

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 January 10, 2020 and July 5, 2020 occur in the previous lunar year eclipse set.
Lunar eclipse series sets from 2020 to 2023 :
| 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 | 2020 Jun 05 | Penumbral | 1.2406 | 116 | 2020 Nov 30 | Penumbral | −1.1309 |
| 121 | 2021 May 26 | Total | 0.4774 | 126 | 2021 Nov 19 | Partial | −0.4553 |
| 131 | 2022 May 16 | Total | −0.2532 | 136 | 2022 Nov 08 | Total | 0.2570 |
| 141 | 2023 May 05 | Penumbral | −1.0350 | 146 | 2023 Oct 28 | Partial | 0.9472 |

### Metonic series

The metonic cycle repeats nearly exactly every 19 years and represents a Saros cycle plus one lunar year. Because it occurs on the same calendar date, the Earth's shadow will in nearly the same location relative to the background stars.
| Metonic events: May 4 and October 28 |
| Descending node | Ascending node |
| 1966 May 4 - Penumbral (111) 1985 May 4 - Total (121) 2004 May 4 - Total (131) 2023 May 5 - Penumbral (141) | 1966 Oct 29 - Penumbral (116) 1985 Oct 28 - Total (126) 2004 Oct 28 - Total (136) 2023 Oct 28 - Partial (146) 2042 Oct 28 - Penumbral (156) |

### Saros 146

This eclipse is a part of Saros series 146, repeating every 18 years, 11 days, and containing 72 events. The series started with a penumbral lunar eclipse on July 11, 1843. It contains partial eclipses from October 17, 2005 through May 14, 2348; total eclipses from May 25, 2366 through November 16, 2654; and a second set of partial eclipses from November 27, 2672 through June 12, 2997. The series ends at member 72 as a penumbral eclipse on August 29, 3123.
The longest duration of totality will be produced by member 37 at 99 minutes, 22 seconds on August 8, 2492. 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 2492 Aug 08, lasting 99 minutes, 22 seconds. | Penumbral | Partial | Total | Central |
| The greatest eclipse of the series will occur on 2492 Aug 08, lasting 99 minutes, 22 seconds. | 1843 Jul 11 | 2005 Oct 17 | 2366 May 25 | 2438 Jul 07 |
| Last ||||
| The greatest eclipse of the series will occur on 2492 Aug 08, lasting 99 minutes, 22 seconds. | Central | Total | Partial | Penumbral |
| The greatest eclipse of the series will occur on 2492 Aug 08, lasting 99 minutes, 22 seconds. | 2546 Sep 11 | 2654 Nov 16 | 2997 Jun 12 | 3123 Aug 29 |
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 1–20 occur between 1843 and 2200: :
| 1 | 1 | 2 | 2 | 3 | 3 |
| 1843 Jul 11 | 1843 Jul 11 | 1861 Jul 21 | 1861 Jul 21 | 1879 Aug 02 | 1879 Aug 02 |
| 4 | 4 | 5 | 5 | 6 | 6 |
| 1897 Aug 12 | 1897 Aug 12 | 1915 Aug 24 | 1915 Aug 24 | 1933 Sep 04 | 1933 Sep 04 |
| 7 | 7 | 8 | 8 | 9 | 9 |
| 1951 Sep 15 | 1951 Sep 15 | 1969 Sep 25 | 1969 Sep 25 | 1987 Oct 07 | 1987 Oct 07 |
| 10 | 10 | 11 | 11 | 12 | 12 |
| 2005 Oct 17 | 2005 Oct 17 | 2023 Oct 28 | 2023 Oct 28 | 2041 Nov 08 | 2041 Nov 08 |
| 13 | 13 | 14 | 14 | 15 | 15 |
| 2059 Nov 19 | 2059 Nov 19 | 2077 Nov 29 | 2077 Nov 29 | 2095 Dec 11 | 2095 Dec 11 |
| 16 | 16 | 17 | 17 | 18 | 18 |
| 2113 Dec 22 | 2113 Dec 22 | 2132 Jan 02 | 2132 Jan 02 | 2150 Jan 13 | 2150 Jan 13 |
| 19 | 19 | 20 | 20 |
| 2168 Jan 24 | 2168 Jan 24 | 2186 Feb 04 | 2186 Feb 04 |

### 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 2132 :
| 1805 Jul 11 (Saros 126) | 1805 Jul 11 (Saros 126) | 1816 Jun 10 (Saros 127) | 1816 Jun 10 (Saros 127) | 1827 May 11 (Saros 128) | 1827 May 11 (Saros 128) | 1838 Apr 10 (Saros 129) | 1838 Apr 10 (Saros 129) | 1849 Mar 09 (Saros 130) | 1849 Mar 09 (Saros 130) |
| 1860 Feb 07 (Saros 131) | 1860 Feb 07 (Saros 131) | 1871 Jan 06 (Saros 132) | 1871 Jan 06 (Saros 132) | 1881 Dec 05 (Saros 133) | 1881 Dec 05 (Saros 133) | 1892 Nov 04 (Saros 134) | 1892 Nov 04 (Saros 134) | 1903 Oct 06 (Saros 135) | 1903 Oct 06 (Saros 135) |
| 1914 Sep 04 (Saros 136) | 1914 Sep 04 (Saros 136) | 1925 Aug 04 (Saros 137) | 1925 Aug 04 (Saros 137) | 1936 Jul 04 (Saros 138) | 1936 Jul 04 (Saros 138) | 1947 Jun 03 (Saros 139) | 1947 Jun 03 (Saros 139) | 1958 May 03 (Saros 140) | 1958 May 03 (Saros 140) |
| 1969 Apr 02 (Saros 141) | 1969 Apr 02 (Saros 141) | 1980 Mar 01 (Saros 142) | 1980 Mar 01 (Saros 142) | 1991 Jan 30 (Saros 143) | 1991 Jan 30 (Saros 143) | 2001 Dec 30 (Saros 144) | 2001 Dec 30 (Saros 144) | 2012 Nov 28 (Saros 145) | 2012 Nov 28 (Saros 145) |
| 2023 Oct 28 (Saros 146) | 2023 Oct 28 (Saros 146) | 2034 Sep 28 (Saros 147) | 2034 Sep 28 (Saros 147) | 2045 Aug 27 (Saros 148) | 2045 Aug 27 (Saros 148) | 2056 Jul 26 (Saros 149) | 2056 Jul 26 (Saros 149) | 2067 Jun 27 (Saros 150) | 2067 Jun 27 (Saros 150) |
| 2132 Dec 22 (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 :
| 1821 Mar 18 (Saros 139) | 1821 Mar 18 (Saros 139) | 1850 Feb 26 (Saros 140) | 1850 Feb 26 (Saros 140) | 1879 Feb 07 (Saros 141) | 1879 Feb 07 (Saros 141) |
| 1908 Jan 18 (Saros 142) | 1908 Jan 18 (Saros 142) | 1936 Dec 28 (Saros 143) | 1936 Dec 28 (Saros 143) | 1965 Dec 08 (Saros 144) | 1965 Dec 08 (Saros 144) |
| 1994 Nov 18 (Saros 145) | 1994 Nov 18 (Saros 145) | 2023 Oct 28 (Saros 146) | 2023 Oct 28 (Saros 146) | 2052 Oct 08 (Saros 147) | 2052 Oct 08 (Saros 147) |
| 2081 Sep 18 (Saros 148) | 2081 Sep 18 (Saros 148) | 2110 Aug 29 (Saros 149) | 2110 Aug 29 (Saros 149) | 2139 Aug 10 (Saros 150) | 2139 Aug 10 (Saros 150) |
| 2168 Jul 20 (Saros 151) | 2168 Jul 20 (Saros 151) | 2197 Jun 29 (Saros 152) | 2197 Jun 29 (Saros 152) |

### 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 partial solar eclipses of Solar Saros 153.
| October 23, 2014 | November 3, 2032 |