October 2013 lunar eclipse
| Penumbral eclipse | |||||||||
 Penumbral eclipse as viewed from Washington, D.C., 23:53 UTC | |||||||||
| Date | October 18, 2013 | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| Gamma | 1.1508 | ||||||||
| Magnitude | −0.2706 | ||||||||
| Saros cycle | 117 (52 of 72) | ||||||||
| Penumbral | 239 minutes, 6 seconds | ||||||||
| |||||||||
A penumbral lunar eclipse occurred at the Moon’s descending node of orbit on Friday, October 18, 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 October 10, 2013, at 19:15 UTC) and 6.9 days before apogee (on October 25, 2013, at 10:25 UTC).[2]
Visibility
[edit]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]
 
|
 Visibility map |
Images
[edit]
Gallery
[edit]-
Kennesaw, Georgia, 0:16 UTC
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 |
|---|---|
| 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]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) |
|---|---|
|
|
| Penumbral lunar eclipse Lunar Saros 117 |
Hybrid solar eclipse Solar Saros 143 |
Related eclipses
[edit]Eclipses in 2013
[edit]- A partial lunar eclipse on April 25.
- An annular solar eclipse on May 10.
- A penumbral lunar eclipse on May 25.
- A penumbral lunar eclipse on October 18.
- A hybrid solar eclipse on November 3.
Metonic
[edit]- Preceded by: Lunar eclipse of December 31, 2009
- Followed by: Lunar eclipse of August 7, 2017
Tzolkinex
[edit]- Preceded by: Lunar eclipse of September 7, 2006
- Followed by: Lunar eclipse of November 30, 2020
Half-Saros
[edit]- Preceded by: Solar eclipse of October 14, 2004
- Followed by: Solar eclipse of October 25, 2022
Tritos
[edit]- Preceded by: Lunar eclipse of November 20, 2002
- Followed by: Lunar eclipse of September 18, 2024
Lunar Saros 117
[edit]- Preceded by: Lunar eclipse of October 8, 1995
- Followed by: Lunar eclipse of October 30, 2031
Inex
[edit]- Preceded by: Lunar eclipse of November 8, 1984
- Followed by: Lunar eclipse of September 29, 2042
Triad
[edit]- Preceded by: Lunar eclipse of December 19, 1926
- Followed by: Lunar eclipse of August 19, 2100
Lunar eclipses of 2013–2016
[edit]The lunar year series repeats after 12 lunations or 354 days (Shifting back about 10 days in sequential years). Because of the date shift, the Earth's shadow will be about 11 degrees west in sequential events.
| Lunar eclipse series sets from 2013–2016 | ||||||||
|---|---|---|---|---|---|---|---|---|
| Ascending node | Descending node | |||||||
| Saros | Viewing date |
Type | Gamma | Saros | Viewing date |
Type | Gamma | |
112
|
2013 Apr 25
|
Partial
|
−1.0121 | 117
|
2013 Oct 18
|
Penumbral
|
1.1508 | |
122
|
2014 Apr 15
|
Total
|
−0.3017 | 127
|
2014 Oct 08
|
Total
|
0.3827 | |
132
|
2015 Apr 04
|
Total
|
0.4460 | 137
|
2015 Sep 28
|
Total
|
−0.3296 | |
| 142 | 2016 Mar 23
|
Penumbral
|
1.1592 | 147
|
2016 Sep 16
|
Penumbral
|
−1.0549 | |
| Last set | 2013 May 25 | Last set | 2012 Nov 28 | |||||
| Next set | 2017 Feb 11 | Next set | 2016 Aug 18 | |||||
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).[5] This lunar eclipse is related to two partial solar eclipses of Solar Saros 124.
| October 14, 2004 | October 25, 2022 |
|---|---|
|
|
See also
[edit]References
[edit]- ^ "October 18–19, 2013 Penumbral Lunar Eclipse". timeanddate. Retrieved 15 November 2024.
- ^ "Moon Distances for London, United Kingdom, England". timeanddate. Retrieved 15 November 2024.
- ^ "Penumbral Lunar Eclipse of 2013 Oct 18" (PDF). NASA. Retrieved 15 November 2024.
- ^ "Penumbral Lunar Eclipse of 2013 Oct 18". EclipseWise.com. Retrieved 15 November 2024.
- ^ Mathematical Astronomy Morsels, Jean Meeus, p.110, Chapter 18, The half-saros
External links
[edit]- 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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