October 2023 lunar eclipse
Partial eclipse | |||||||||||||
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Date | October 28, 2023 | ||||||||||||
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Gamma | 0.9471 | ||||||||||||
Magnitude | 0.1234 | ||||||||||||
Saros cycle | 146 (11 of 72) | ||||||||||||
Partiality | 77 minutes, 21 seconds | ||||||||||||
Penumbral | 264 minutes, 34 seconds | ||||||||||||
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A partial lunar eclipse occurred at the Moon’s ascending node of orbit on Saturday, October 28, 2023,[1] 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.[2]
Visibility
[edit]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.[3]
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Gallery
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Surabaya, Indonesia, 20:14 UTC
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Lunar eclipse in Vladivostok, Russia, 20:15 UTC
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Partial from Kumbakonam, India, 20:21 UTC
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Sequence of lunar eclipse from Oria, Italy
Eclipse details
[edit]Shown below is a table displaying details about this particular solar eclipse. It describes various parameters pertaining to this eclipse.[4]
Parameter | Value |
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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
[edit]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.
October 14 Descending node (new moon) |
October 28 Ascending node (full moon) |
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Annular solar eclipse Solar Saros 134 |
Partial lunar eclipse Lunar Saros 146 |
Related eclipses
[edit]Eclipses in 2023
[edit]- 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
[edit]- Preceded by: Lunar eclipse of January 10, 2020
- Followed by: Lunar eclipse of August 17, 2027
Tzolkinex
[edit]- Preceded by: Lunar eclipse of September 16, 2016
- Followed by: Lunar eclipse of December 9, 2030
Half-Saros
[edit]- Preceded by: Solar eclipse of October 23, 2014
- Followed by: Solar eclipse of November 3, 2032
Tritos
[edit]- Preceded by: Lunar eclipse of November 28, 2012
- Followed by: Lunar eclipse of September 28, 2034
Lunar Saros 146
[edit]- Preceded by: Lunar eclipse of October 17, 2005
- Followed by: Lunar eclipse of November 8, 2041
Inex
[edit]- Preceded by: Lunar eclipse of November 18, 1994
- Followed by: Lunar eclipse of October 8, 2052
Triad
[edit]- Preceded by: Lunar eclipse of December 28, 1936
- Followed by: Lunar eclipse of August 29, 2110
Lunar eclipses of 2020–2023
[edit]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.[5]
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 | ||||||||
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Descending 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
[edit]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 | |
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Descending node | Ascending node |
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Saros 146
[edit]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.[6]
Greatest | First | |||
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The greatest eclipse of the series will occur on 2492 Aug 08, lasting 99 minutes, 22 seconds.[7] | Penumbral | Partial | Total | Central |
1843 Jul 11 |
2005 Oct 17![]() |
2366 May 25 |
2438 Jul 07 | |
Last | ||||
Central | Total | Partial | Penumbral | |
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: | |||||
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1 | 2 | 3 | |||
1843 Jul 11 | 1861 Jul 21 | 1879 Aug 02 | |||
4 | 5 | 6 | |||
1897 Aug 12 | 1915 Aug 24 | 1933 Sep 04 | |||
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7 | 8 | 9 | |||
1951 Sep 15 | 1969 Sep 25 | 1987 Oct 07 | |||
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10 | 11 | 12 | |||
2005 Oct 17 | 2023 Oct 28 | 2041 Nov 08 | |||
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13 | 14 | 15 | |||
2059 Nov 19 | 2077 Nov 29 | 2095 Dec 11 | |||
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16 | 17 | 18 | |||
2113 Dec 22 | 2132 Jan 02 | 2150 Jan 13 | |||
19 | 20 | ||||
2168 Jan 24 | 2186 Feb 04 | ||||
Tritos series
[edit]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 | |||||||||
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1805 Jul 11 (Saros 126) |
1816 Jun 10 (Saros 127) |
1827 May 11 (Saros 128) |
1838 Apr 10 (Saros 129) |
1849 Mar 09 (Saros 130) | |||||
1860 Feb 07 (Saros 131) |
1871 Jan 06 (Saros 132) |
1881 Dec 05 (Saros 133) |
1892 Nov 04 (Saros 134) |
1903 Oct 06 (Saros 135) | |||||
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1914 Sep 04 (Saros 136) |
1925 Aug 04 (Saros 137) |
1936 Jul 04 (Saros 138) |
1947 Jun 03 (Saros 139) |
1958 May 03 (Saros 140) | |||||
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1969 Apr 02 (Saros 141) |
1980 Mar 01 (Saros 142) |
1991 Jan 30 (Saros 143) |
2001 Dec 30 (Saros 144) |
2012 Nov 28 (Saros 145) | |||||
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2023 Oct 28 (Saros 146) |
2034 Sep 28 (Saros 147) |
2045 Aug 27 (Saros 148) |
2056 Jul 26 (Saros 149) |
2067 Jun 27 (Saros 150) | |||||
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2132 Dec 22 (Saros 156) | |||||||||
Half-Saros cycle
[edit]A lunar eclipse will be preceded and followed by solar eclipses by 9 years and 5.5 days (a half saros).[8] This lunar eclipse is related to two partial solar eclipses of Solar Saros 153.
October 23, 2014 | November 3, 2032 |
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See also
[edit]References
[edit]- ^ "October 28–29, 2023 Partial Lunar Eclipse". timeanddate. Retrieved 18 November 2024.
- ^ "Moon Distances for London, United Kingdom, England". timeanddate. Retrieved 18 November 2024.
- ^ "Partial Lunar Eclipse of 2023 Oct 28" (PDF). NASA. Retrieved 18 November 2024.
- ^ "Partial Lunar Eclipse of 2023 Oct 28". EclipseWise.com. Retrieved 18 November 2024.
- ^ van Gent, R.H. "Solar- and Lunar-Eclipse Predictions from Antiquity to the Present". A Catalogue of Eclipse Cycles. Utrecht University. Retrieved 6 October 2018.
- ^ "NASA - Catalog of Lunar Eclipses of Saros 146". eclipse.gsfc.nasa.gov.
- ^ Listing of Eclipses of series 146
- ^ Mathematical Astronomy Morsels, Jean Meeus, p.110, Chapter 18, The half-saros
External links
[edit]- Saros cycle 146
- 2023 Oct 28 chart: Eclipse Predictions by Fred Espenak, NASA/GSFC