September 1913 lunar eclipse
| Total eclipse | |||||||||||||||||
 The Moon's hourly motion shown right to left | |||||||||||||||||
| Date | September 15, 1913 | ||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Gamma | −0.2109 | ||||||||||||||||
| Magnitude | 1.4304 | ||||||||||||||||
| Saros cycle | 126 (39 of 70) | ||||||||||||||||
| Totality | 93 minutes, 29 seconds | ||||||||||||||||
| Partiality | 230 minutes, 33 seconds | ||||||||||||||||
| Penumbral | 373 minutes, 1 second | ||||||||||||||||
| |||||||||||||||||
A total lunar eclipse occurred at the Moon’s ascending node of orbit on Monday, September 15, 1913,[1] with an umbral magnitude of 1.4304. A lunar eclipse occurs when the Moon moves into the Earth's shadow, causing the Moon to be darkened. A total lunar eclipse occurs when the Moon's near side entirely passes into the Earth's umbral shadow. 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. A total lunar eclipse can last up to nearly two hours, while a total solar eclipse lasts only a few minutes at any given place, because the Moon's shadow is smaller. Occurring only about 30 minutes after apogee (on September 15, 1913, at 12:20 UTC), the Moon's apparent diameter was smaller.[2]
The moon passed through the center of the Earth's shadow.[3]
Visibility
[edit]The eclipse was completely visible over northeast Asia and Australia, seen rising over much of Asia and east Africa and setting over North America and western South America.[4]
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Eclipse details
[edit]Shown below is a table displaying details about this particular solar eclipse. It describes various parameters pertaining to this eclipse.[5]
| Parameter | Value |
|---|---|
| Penumbral Magnitude | 2.51225 |
| Umbral Magnitude | 1.43037 |
| Gamma | −0.21093 |
| Sun Right Ascension | 11h30m49.6s |
| Sun Declination | +03°09'08.3" |
| Sun Semi-Diameter | 15'54.6" |
| Sun Equatorial Horizontal Parallax | 08.7" |
| Moon Right Ascension | 23h31m11.8s |
| Moon Declination | -03°19'05.5" |
| Moon Semi-Diameter | 14'42.3" |
| Moon Equatorial Horizontal Parallax | 0°53'58.2" |
| ΔT | 15.4 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. The first and last eclipse in this sequence is separated by one synodic month.
| August 31 Descending node (new moon) |
September 15 Ascending node (full moon) |
September 30 Descending node (new moon) |
|---|---|---|
 |
|
|
| Partial solar eclipse Solar Saros 114 |
Total lunar eclipse Lunar Saros 126 |
Partial solar eclipse Solar Saros 152 |
Related eclipses
[edit]Eclipses in 1913
[edit]- A total lunar eclipse on March 22.
- A partial solar eclipse on April 6.
- A partial solar eclipse on August 31.
- A total lunar eclipse on September 15.
- A partial solar eclipse on September 30.
Metonic
[edit]- Preceded by: Lunar eclipse of November 27, 1909
- Followed by: Lunar eclipse of July 4, 1917
Tzolkinex
[edit]- Preceded by: Lunar eclipse of August 4, 1906
- Followed by: Lunar eclipse of October 27, 1920
Half-Saros
[edit]- Preceded by: Solar eclipse of September 9, 1904
- Followed by: Solar eclipse of September 21, 1922
Tritos
[edit]- Preceded by: Lunar eclipse of October 17, 1902
- Followed by: Lunar eclipse of August 14, 1924
Lunar Saros 126
[edit]- Preceded by: Lunar eclipse of September 4, 1895
- Followed by: Lunar eclipse of September 26, 1931
Inex
[edit]- Preceded by: Lunar eclipse of October 4, 1884
- Followed by: Lunar eclipse of August 26, 1942
Triad
[edit]- Preceded by: Lunar eclipse of November 14, 1826
- Followed by: Lunar eclipse of July 16, 2000
Lunar eclipses of 1912–1915
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Saros 126
[edit]It is part of saros series 126.
Lunar saros series 126, repeating every 18 years and 11 days, has a total of 70 lunar eclipse events including 14 total lunar eclipses. Solar Saros 133 interleaves with this lunar saros with an event occurring every 9 years 5 days alternating between each saros series.
First penumbral lunar eclipse: 18 July 1228
First partial lunar eclipse: 24 March 1625
First total lunar eclipse: 19 June 1769
First central lunar eclipse: 11 July 1805
Greatest eclipse of the lunar saros 126: 13 August 1859, lasting 106 minutes.
Last central lunar eclipse: 26 September 1931
Last total lunar eclipse: 9 November 2003
Last partial lunar eclipse: 5 June 2346
Last penumbral lunar eclipse: 19 August 2472
1901-2100
Inex series
[edit]The inex series repeats eclipses 20 days short of 29 years, repeating on average every 10571.95 days. This period is equal to 358 lunations (synodic months) and 388.5 draconic months. Saros series increment by one on successive Inex events and repeat at alternate ascending and descending lunar nodes.
This period is 383.6734 anomalistic months (the period of the Moon's elliptical orbital precession). Despite the average 0.05 time-of-day shift between subsequent events, the variation of the Moon in its elliptical orbit at each event causes the actual eclipse time to vary significantly. It is a part of Lunar Inex series 40.
All events in this series shown (from 1000 to 2500) are central total lunar eclipses.
| Descending node | Ascending node | Descending node | Ascending node | ||||
|---|---|---|---|---|---|---|---|
| Saros | Date | Saros | Date | Saros | Date | Saros | Date |
| 95 | 1016 May 24 | 96 | 1045 May 3 | 97 | 1074 Apr 14 | 98 | 1103 Mar 25 |
| 99 | 1132 Mar 3 | 100 | 1161 Feb 12 | 101 | 1190 Jan 23 | 102 | 1219 Jan 2 |
| 103 | 1247 Dec 13 | 104 | 1276 Nov 23 | 105 | 1305 Nov 2 | 106 | 1334 Oct 13 |
| 107 | 1363 Sep 23 | 108 | 1392 Sep 2 | 109 | 1421 Aug 13 | 110 | 1450 Jul 24 |
| 111 | 1479 Jul 4 | 112 | 1508 Jun 13
|
113 | 1537 May 24 | 114 | 1566 May 4 |
| 115 | 1595 Apr 24 | 116 | 1624 Apr 3 | 117 | 1653 Mar 14 | 118 | 1682 Feb 21 |
| 119 | 1711 Feb 3 | 120 | 1740 Jan 13 | 121 | 1768 Dec 23 | 122 | 1797 Dec 4 |
| 123 | 1826 Nov 14 | 124 | 1855 Oct 25 | 125 | 1884 Oct 4 | 126 | 1913 Sep 15
|
| 127 | 1942 Aug 26
|
128 | 1971 Aug 6
|
129 | 2000 Jul 16
|
130 | 2029 Jun 26
|
| 131 | 2058 Jun 6
|
132 | 2087 May 17
|
133 | 2116 Apr 27 | 134 | 2145 Apr 7 |
| 135 | 2174 Mar 18 | 136 | 2203 Feb 26 | 137 | 2232 Feb 7 | 138 | 2261 Jan 17 |
| 139 | 2289 Dec 27 | 140 | 2318 Dec 9 | 141 | 2347 Nov 19 | 142 | 2376 Oct 28 |
| 143 | 2405 Oct 8 | 144 | 2434 Sep 18 | 145 | 2463 Aug 29 | 146 | 2492 Aug 8
|
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).[6] This lunar eclipse is related to two total solar eclipses of Solar Saros 133.
| September 9, 1904 | September 21, 1922 |
|---|---|
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See also
[edit]Notes
[edit]- ^ "September 15–16, 1913 Total Lunar Eclipse (Blood Moon)". timeanddate. Retrieved 16 December 2024.
- ^ "Moon Distances for London, United Kingdom, England". timeanddate. Retrieved 16 December 2024.
- ^ Saros series 126
- ^ "Total Lunar Eclipse of 1913 Sep 15" (PDF). NASA. Retrieved 16 December 2024.
- ^ "Total Lunar Eclipse of 1913 Sep 15". EclipseWise.com. Retrieved 16 December 2024.
- ^ Mathematical Astronomy Morsels, Jean Meeus, p.110, Chapter 18, The half-saros
External links
[edit]- 1913 Sep 15 chart Eclipse Predictions by Fred Espenak, NASA/GSFC
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