April 2013 lunar eclipse
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A partial lunar eclipse occurred at the Moon's ascending node of orbit on Thursday, April 25, 2013, with an umbral magnitude of 0.0160. 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 1.8 days before perigee (on April 27, 2013, at 15:50 UTC), the Moon's apparent diameter was larger.
Only a tiny sliver (1.48%) of the Moon was covered by the Earth's umbral shadow at maximum eclipse, but the entire northern half of the Moon was darkened from being inside the penumbral shadow. This was one of the shortest partial eclipses of the Moon in the 21st century, lasting 27 minutes. This was also the last of 58 umbral lunar eclipses in Lunar Saros 112.
Visibility
The eclipse was completely visible over Africa, Europe, and Asia, seen rising over eastern South America and setting over Australia.
| Visibility map |
Images
Gallery
- From Melbourne, Australia, 18:42 UTC
- From Las Palmas, Canary Islands, 20:05 UTC
- From Essex, England, 20:06 UTC
- From Arinaga, Canary Islands, 20:07 UTC
- From Foncquevillers, France, 20:08 UTC
- From Belfort, France, combined images
- From Thatcham, UK, 20:10 UTC
- From Zürich, Switzerland, 20:12 UTC
- From Düsseldorf, Germany, 20:13 UTC
- From Paris, France, 20:18 UTC
- From Brescia, Italy, 20:19 UTC
- Time lapsed image from Ladispoli, Italy
Eclipse details
Shown below is a table displaying details about this particular solar eclipse. It describes various parameters pertaining to this eclipse.
| Parameter | Value |
|---|---|
| Penumbral Magnitude | 0.98783 |
| Umbral Magnitude | 0.01596 |
| Gamma | −1.01214 |
| Sun Right Ascension | 02h13m51.3s |
| Sun Declination | +13°26'35.0" |
| Sun Semi-Diameter | 15'53.7" |
| Sun Equatorial Horizontal Parallax | 08.7" |
| Moon Right Ascension | 14h12m51.4s |
| Moon Declination | -14°25'34.1" |
| Moon Semi-Diameter | 16'21.4" |
| Moon Equatorial Horizontal Parallax | 1°00'01.6" |
| ΔT | 67.1 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. The first and last eclipse in this sequence is separated by one synodic month.
| April 25 Ascending node (full moon) | May 10 Descending node (new moon) | May 25 Ascending node (full moon) |
|---|---|---|
| Partial lunar eclipse Lunar Saros 112 | Annular solar eclipse Solar Saros 138 | Penumbral lunar eclipse Lunar Saros 150 |
Related eclipses
Eclipses in 2013
- 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
- Preceded by: Lunar eclipse of July 7, 2009
- Followed by: Lunar eclipse of February 11, 2017
Tzolkinex
- Preceded by: Lunar eclipse of March 14, 2006
- Followed by: Lunar eclipse of June 5, 2020
Half-Saros
- Preceded by: Solar eclipse of April 19, 2004
- Followed by: Solar eclipse of April 30, 2022
Tritos
- Preceded by: Lunar eclipse of May 26, 2002
- Followed by: Lunar eclipse of March 25, 2024
Lunar Saros 112
- Preceded by: Lunar eclipse of April 15, 1995
- Followed by: Lunar eclipse of May 7, 2031
Inex
- Preceded by: Lunar eclipse of May 15, 1984
- Followed by: Lunar eclipse of April 5, 2042
Triad
- Preceded by: Lunar eclipse of June 25, 1926
- Followed by: Lunar eclipse of February 24, 2100
Lunar eclipses of 2013–2016
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 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.
| Lunar eclipse series sets from 2013 to 2016 | |||||||
|---|---|---|---|---|---|---|---|
| Ascending node | Descending node | ||||||
| Saros | Date Viewing | Type Chart | Gamma | Saros | Date Viewing | Type Chart | 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 |
Saros 112
This eclipse is a part of Saros series 112, repeating every 18 years, 11 days, and containing 72 events. The series started with a penumbral lunar eclipse on May 20, 859 AD. It contains partial eclipses from August 3, 985 AD through March 8, 1346; total eclipses from March 18, 1364 through August 27, 1616; and a second set of partial eclipses from September 7, 1634 through April 25, 2013. The series ends at member 72 as a penumbral eclipse on July 12, 2139.
The longest duration of totality was produced by member 36 at 99 minutes, 51 seconds on June 2, 1490. All eclipses in this series occur at the Moon’s ascending node of orbit.
| Greatest | First | |||
|---|---|---|---|---|
| The greatest eclipse of the series occurred on 1490 Jun 02, lasting 99 minutes, 51 seconds. | Penumbral | Partial | Total | Central |
| 859 May 20 | 985 Aug 03 | 1364 Mar 18 | 1436 Apr 30 | |
| Last | ||||
| Central | Total | Partial | Penumbral | |
| 1562 Jul 16 | 1616 Aug 27 | 2013 Apr 25 | 2139 Jul 12 |
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 54–72 occur between 1801 and 2139: | |||||
|---|---|---|---|---|---|
| 54 | 55 | 56 | |||
| 1814 Dec 26 | 1833 Jan 06 | 1851 Jan 17 | |||
| 57 | 58 | 59 | |||
| 1869 Jan 28 | 1887 Feb 08 | 1905 Feb 19 | |||
| 60 | 61 | 62 | |||
| 1923 Mar 03 | 1941 Mar 13 | 1959 Mar 24 | |||
| 63 | 64 | 65 | |||
| 1977 Apr 04 | 1995 Apr 15 | 2013 Apr 25 | |||
| 66 | 67 | 68 | |||
| 2031 May 07 | 2049 May 17 | 2067 May 28 | |||
| 69 | 70 | 71 | |||
| 2085 Jun 08 | 2103 Jun 20 | 2121 Jun 30 | |||
| 72 | |||||
| 2139 Jul 12 | |||||
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 1904 and 2200 | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| 1904 Mar 02 (Saros 102) | 1915 Jan 31 (Saros 103) | ||||||||
| 1969 Aug 27 (Saros 108) | 1980 Jul 27 (Saros 109) | 1991 Jun 27 (Saros 110) | 2002 May 26 (Saros 111) | ||||||
| 2013 Apr 25 (Saros 112) | 2024 Mar 25 (Saros 113) | 2035 Feb 22 (Saros 114) | 2046 Jan 22 (Saros 115) | 2056 Dec 22 (Saros 116) | |||||
| 2067 Nov 21 (Saros 117) | 2078 Oct 21 (Saros 118) | 2089 Sep 19 (Saros 119) | 2100 Aug 19 (Saros 120) | 2111 Jul 21 (Saros 121) | |||||
| 2122 Jun 20 (Saros 122) | 2133 May 19 (Saros 123) | 2144 Apr 18 (Saros 124) | 2155 Mar 19 (Saros 125) | 2166 Feb 15 (Saros 126) | |||||
| 2177 Jan 14 (Saros 127) | 2187 Dec 15 (Saros 128) | 2198 Nov 13 (Saros 129) | |||||||
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 | |||||
|---|---|---|---|---|---|
| 1810 Sep 13 (Saros 105) | 1839 Aug 24 (Saros 106) | 1868 Aug 03 (Saros 107) | |||
| 1897 Jul 14 (Saros 108) | 1926 Jun 25 (Saros 109) | 1955 Jun 05 (Saros 110) | |||
| 1984 May 15 (Saros 111) | 2013 Apr 25 (Saros 112) | 2042 Apr 05 (Saros 113) | |||
| 2071 Mar 16 (Saros 114) | 2100 Feb 24 (Saros 115) | 2129 Feb 04 (Saros 116) | |||
| 2158 Jan 14 (Saros 117) | 2186 Dec 26 (Saros 118) | ||||
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 119.
See also
External links
- Eclipse Predictions by Fred Espenak, NASA/GSFC
- APOD 2013/5/25