October 2013 lunar eclipse
| Penumbral eclipse | |||||||||
| File:MG 8074 (10353408985) (cropped).jpg Penumbral eclipse as viewed from Washington, D.C., 23:53 UTC | |||||||||
| Date | 18 October 2013 | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| Gamma | 1.1508 | ||||||||
| Magnitude | −0.2706 | ||||||||
| Saros cycle | 117 (52 of 72) | ||||||||
| Penumbral | 239 minutes, 6 seconds | ||||||||
| |||||||||
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A penumbral lunar eclipse occurred at the Moon’s descending node of orbit on Friday, 18 October 2013,[1] with an umbral magnitude of −0.2706. A lunar eclipse occurs when the Moon moves into the Earth's shadow, causing the Moon to be darkened. A penumbral lunar eclipse occurs when part or all of the Moon's near side passes into 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 8.2 days after perigee (on 10 October 2013, at 19:15 UTC) and 6.9 days before apogee (on 25 October 2013, at 10:25 UTC).[2]
Visibility
[edit | edit source]The eclipse was completely visible over Africa, Europe, eastern South America, and west Asia, seen rising over western South America and North America and setting over south and east Asia.[3]
| File:Lunar eclipse from moon-2013Oct18.png File:Lunar eclipse chart close-2013Oct18.png |
| File:Visibility Lunar Eclipse 2013-10-18.png Visibility map |
Images
[edit | edit source]
Gallery
[edit | edit source]-
Kennesaw, Georgia, 0:16 UTC
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Eclipse details
[edit | edit source]Shown below is a table displaying details about this particular lunar eclipse. It describes various parameters pertaining to this eclipse.[4]
| Parameter | Value |
|---|---|
| Penumbral Magnitude | 0.76603 |
| Umbral Magnitude | −0.27064 |
| Gamma | 1.15082 |
| Sun Right Ascension | 13h35m31.9s |
| Sun Declination | -09°57'14.9" |
| Sun Semi-Diameter | 16'03.4" |
| Sun Equatorial Horizontal Parallax | 08.8" |
| Moon Right Ascension | 01h34m19.6s |
| Moon Declination | +11°00'12.1" |
| Moon Semi-Diameter | 15'29.3" |
| Moon Equatorial Horizontal Parallax | 0°56'50.7" |
| ΔT | 67.2 s |
Eclipse season
[edit | edit source]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 18 Descending node (full moon) |
November 3 Ascending node (new moon) |
|---|---|
| File:Lunar eclipse chart close-2013Oct18.png | File:SE2013Nov03H.png |
| Penumbral lunar eclipse Lunar Saros 117 |
Hybrid solar eclipse Solar Saros 143 |
Related eclipses
[edit | edit source]Eclipses in 2013
[edit | edit source]- A partial lunar eclipse on 25 April.
- An annular solar eclipse on 10 May.
- A penumbral lunar eclipse on 25 May.
- A penumbral lunar eclipse on 18 October.
- A hybrid solar eclipse on 3 November.
Metonic
[edit | edit source]- Preceded by: Lunar eclipse of 31 December 2009
- Followed by: Lunar eclipse of 7 August 2017
Tzolkinex
[edit | edit source]- Preceded by: Lunar eclipse of 7 September 2006
- Followed by: Lunar eclipse of 30 November 2020
Half-Saros
[edit | edit source]- Preceded by: Solar eclipse of 14 October 2004
- Followed by: Solar eclipse of 25 October 2022
Tritos
[edit | edit source]- Preceded by: Lunar eclipse of 20 November 2002
- Followed by: Lunar eclipse of 18 September 2024
Lunar Saros 117
[edit | edit source]- Preceded by: Lunar eclipse of 8 October 1995
- Followed by: Lunar eclipse of 30 October 2031
Inex
[edit | edit source]- Preceded by: Lunar eclipse of 8 November 1984
- Followed by: Lunar eclipse of 29 September 2042
Triad
[edit | edit source]- Preceded by: Lunar eclipse of 19 December 1926
- Followed by: Lunar eclipse of 19 August 2100
Lunar eclipses of 2013–2016
[edit | edit source]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 eclipse on May 25, 2013 occurs in the previous lunar year eclipse set, and the penumbral lunar eclipse on August 18, 2016 occurs in the next lunar year eclipse set.
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Saros 117
[edit | edit source]This eclipse is a part of Saros series 117, repeating every 18 years, 11 days, and containing 71 events. The series started with a penumbral lunar eclipse on April 3, 1094. It contains partial eclipses from June 29, 1238 through September 23, 1382; total eclipses from October 3, 1400 through June 21, 1815; and a second set of partial eclipses from July 2, 1833 through September 5, 1941. The series ends at member 71 as a penumbral eclipse on May 15, 2356.
The longest duration of totality was produced by member 35 at 105 minutes, 43 seconds on April 17, 1707. All eclipses in this series occur at the Moon’s descending node of orbit.[6]
| Greatest | First | |||
|---|---|---|---|---|
| The greatest eclipse of the series occurred on 1707 Apr 17, lasting 105 minutes, 43 seconds.[7] | Penumbral | Partial | Total | Central |
| 1094 Apr 03 |
1238 Jun 29 |
1400 Oct 03 |
1563 Jan 09 | |
| Last | ||||
| Central | Total | Partial | Penumbral | |
| 1761 May 18 |
1815 Jun 21 |
1941 Sep 05 File:Lunar eclipse chart close-1941Sep05.png |
2356 May 15 | |
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.
Tritos series
[edit | edit source]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.
Inex series
[edit | edit source]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 | |||||
|---|---|---|---|---|---|
| 1811 Mar 10 (Saros 110) |
1840 Feb 17 (Saros 111) |
1869 Jan 28 (Saros 112) | |||
| 1898 Jan 08 (Saros 113) |
1926 Dec 19 (Saros 114) |
1955 Nov 29 (Saros 115) | |||
| File:Lunar eclipse chart close-1926Dec19.png | File:Lunar eclipse from moon-1926Dec19.png | File:Lunar eclipse chart close-1955Nov29.png | File:Lunar eclipse from moon-1955Nov29.png | ||
| 1984 Nov 08 (Saros 116) |
2013 Oct 18 (Saros 117) |
2042 Sep 29 (Saros 118) | |||
| File:Lunar eclipse chart close-1984Nov08.png | File:Lunar eclipse from moon-1984Nov08.png | File:Lunar eclipse chart close-2013Oct18.png | File:Lunar eclipse from moon-2013Oct18.png | File:Lunar eclipse chart close-2042Sep29.png | File:Lunar eclipse from moon-2042Sep29.png |
| 2071 Sep 09 (Saros 119) |
2100 Aug 19 (Saros 120) |
2129 Jul 31 (Saros 121) | |||
| 2158 Jul 11 (Saros 122) |
2187 Jun 20 (Saros 123) | ||||
Half-Saros cycle
[edit | edit source]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 124.
| October 14, 2004 | October 25, 2022 |
|---|---|
| File:SE2004Oct14P.png | File:SE2022Oct25P.png |
See also
[edit | edit source]References
[edit | edit source]- ^ Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
- ^ Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
- ^ Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
- ^ Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
- ^ Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
- ^ Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
- ^ Listing of Eclipses of series 117
- ^ Mathematical Astronomy Morsels, Jean Meeus, p.110, Chapter 18, The half-saros
External links
[edit | edit source]- 2013 Oct 18 chart: Eclipse Predictions by Fred Espenak, NASA/GSFC
- Hermit eclipse: 23 Mar 2016 – Penumbral Lunar Eclipse
- Eclipse Geeks Penumbra Lunar Eclipse 18/19 October 2013 Archived 25 February 2020 at the Wayback Machine
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