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June 2011 lunar eclipse

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June 2011 lunar eclipse
Total eclipse
Totality as viewed from Dar es Salaam, Tanzania, 19:28 UTC
DateJune 15, 2011
Gamma0.0897
Magnitude1.7014
Saros cycle130 (34 of 72)
Totality100 minutes, 13 seconds
Partiality219 minutes, 17 seconds
Penumbral336 minutes, 4 seconds
Contacts (UTC)
P117:24:37
U118:22:57
U219:22:29
Greatest20:12:36
U321:02:42
U422:02:14
P423:00:41

A total lunar eclipse occurred at the Moon’s ascending node of orbit on Wednesday, June 15, 2011,[1] with an umbral magnitude of 1.7014. 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 about 4.1 days after perigee (on June 11, 2011, at 21:40 UTC), the Moon's apparent diameter was larger.[2]

This was a relatively rare central lunar eclipse, where the Moon crossed the center of the Earth's shadow. The last time a lunar eclipse was closer to the center of the Earth's shadow was on July 16, 2000. The next central total lunar eclipse occurred on July 27, 2018.

Visibility and viewing

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The eclipse was completely visible over east Africa, Antarctica, and west, central, and south Asia, seen rising over Europe, west Africa, and South America and setting over east Asia and Australia.[3]

In western Asia, Australia, and the Philippines, the lunar eclipse was visible just before sunrise.[4] It was very visible in the clear and cloudless night sky throughout eastern and southeast Asia. Africa, far eastern Russia and Europe witnessed the whole event even in the late stages (as in partial lunar eclipse). The Americas (including North and northwestern South America) missed the eclipse completely (except in most areas) because it occurred at moonset.


Hourly motion shown right to left
The Moon's hourly motion across the Earth's shadow in the constellation of Ophiuchus (north of Scorpius).

Visibility map

Images

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NASA chart of the eclipse
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Eclipse details

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Shown below is a table displaying details about this particular solar eclipse. It describes various parameters pertaining to this eclipse.[5]

June 15, 2011 Lunar Eclipse Parameters
Parameter Value
Penumbral Magnitude 2.68833
Umbral Magnitude 1.70136
Gamma 0.08968
Sun Right Ascension 05h35m33.6s
Sun Declination +23°19'06.1"
Sun Semi-Diameter 15'44.7"
Sun Equatorial Horizontal Parallax 08.7"
Moon Right Ascension 17h35m32.3s
Moon Declination -23°13'51.6"
Moon Semi-Diameter 15'57.2"
Moon Equatorial Horizontal Parallax 0°58'33.0"
ΔT 66.5 s

Eclipse season

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See also: Eclipse cycle

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.

Eclipse season of June–July 2011
June 1
Descending node (new moon)
 June 15
Ascending node (full moon)
 July 1
Descending node (new moon)
Partial solar eclipse
Solar Saros 118		 Total lunar eclipse
Lunar Saros 130		 Partial solar eclipse
Solar Saros 156
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Eclipses in 2011

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Metonic

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Tzolkinex

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Half-Saros

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Tritos

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Lunar Saros 130

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Inex

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Triad

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Lunar eclipses of 2009–2013

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This eclipse is the center of nine lunar eclipses in a short-lived series. Each eclipse in the series repeats after one semester (6 lunations or 177 days) occurring at alternating nodes.

Lunar eclipse series sets from 2009–2013
Ascending node   Descending node
Saros #
Photo 		Date
Viewing 		Type
chart 		Gamma Saros #
Photo 		Date
Viewing 		Type
chart 		Gamma
110 2009 Jul 07
 penumbral
 −1.4916 115
 2009 Dec 31
 partial
 0.9766
120
 2010 Jun 26
 partial
 −0.7091 125
 2010 Dec 21
 total
 0.3214
130
 2011 Jun 15
 total
 0.0897 135
 2011 Dec 10
 total
 −0.3882
140
 2012 Jun 04
 partial
 0.8248 145 2012 Nov 28
 penumbral
 −1.0869
150 2013 May 25
 penumbral
 1.5351
Last set 2009 Aug 06 Last set 2009 Feb 9
Next set 2013 Apr 25 Next set 2013 Oct 18

Saros 130

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Lunar saros series 130, repeating every 18 years and 11 days, has a total of 71 lunar eclipse events including 56 umbral lunar eclipses (42 partial lunar eclipses and 14 total lunar eclipses). Solar Saros 137 interleaves with this lunar saros with an event occurring every 9 years 5 days alternating between each saros series.

Greatest First

The greatest eclipse of the series will occur on 2029 Jun 26, lasting 102 minutes.[6] 		Penumbral Partial Total Central
1416 Jun 10 1560 Sep 4 1921 Apr 22
 1957 May 13
Last
Central Total Partial Penumbral
2083 Jul 29
 2155 Sep 11 2552 May 10 2678 Jul 26
1901–2200
1903 Apr 12 1921 Apr 22 1939 May 3
1957 May 13 1975 May 25 1993 Jun 4
2011 Jun 15 2029 Jun 26 2047 Jul 7
2065 Jul 17 2083 Jul 29

Tritos series

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The tritos series repeats 31 days short of 11 years at alternating nodes. Sequential events have incremental Saros cycle indices.

This series produces 23 total eclipses between June 22, 1880 and August 9, 2120.

Tritos eclipse series (subset 1901–2100)
Ascending node   Descending node
Saros Date
Viewing 		Type
chart 		Saros Date
Viewing 		Type
chart
120 1902 Apr 22
 Total
 121 1913 Mar 22
 Total
122 1924 Feb 20
 Total
 123 1935 Jan 19
 Total
124 1945 Dec 19
 Total
 125 1956 Nov 18
 Total
126 1967 Oct 18
 Total
 127 1978 Sep 16
 Total
128 1989 Aug 17
 Total
 129 2000 Jul 16
 Total
130 2011 Jun 15
 Total
 131 2022 May 16
 Total
132 2033 Apr 14
 Total
 133 2044 Mar 13
 Total
134 2055 Feb 11
 Total
 135 2066 Jan 11
 Total
136 2076 Dec 10
 Total
 137 2087 Nov 10
 Total
138 2098 Oct 10
 Total

Inex series

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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 39.

All events in this series listed below and more are total lunar eclipses.

Inex series from 1000 to 2500 AD
Ascending node Descending node Ascending node Descending node
Saros Date Saros Date Saros Date Saros Date
96 1027 Apr 23 97 1056 Apr 2 98 1085 Mar 14 99 1114 Feb 21
100 1143 Feb 1 101 1172 Jan 13 102 1200 Dec 22 103 1229 Dec 2
104 1258 Nov 12 105 1287 Oct 22 106 1316 Oct 2 107 1345 Sep 12
108 1374 Aug 22 109 1403 Aug 2 110 1432 Jul 13 111 1461 Jun 22
112 1490 Jun 2 113 1519 May 14 114 1548 Apr 22 115 1577 Apr 2
116 1606 Mar 24 117 1635 Mar 3 118 1664 Feb 11 119 1693 Jan 22
120 1722 Jan 2 121 1750 Dec 13 122 1779 Nov 23 123 1808 Nov 3
124 1837 Oct 13 125 1866 Sep 24 126 1895 Sep 4 127 1924 Aug 14
128 1953 Jul 26
 129 1982 Jul 6
 130 2011 Jun 15
 131 2040 May 26
132 2069 May 6
 133 2098 Apr 15
 134 2127 Mar 28 135 2156 Mar 7
136 2185 Feb 14 137 2214 Jan 27 138 2243 Jan 7 139 2271 Dec 17
140 2300 Nov 27 141 2329 Nov 7 142 2358 Oct 18 143 2387 Sep 28
144 2416 Sep 7 145 2445 Aug 17 146 2474 Jul 29

Half-Saros cycle

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A lunar eclipse will be preceded and followed by solar eclipses by 9 years and 5.5 days (a half saros).[7] This lunar eclipse is related to two annular solar eclipses of Solar Saros 137.

June 10, 2002 June 21, 2020

See also

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Notes

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  1. ^ "June 15–16, 2011 Total Lunar Eclipse (Blood Moon)". timeanddate. Retrieved 15 November 2024.
  2. ^ "Moon Distances for London, United Kingdom, England". timeanddate. Retrieved 15 November 2024.
  3. ^ "Total Lunar Eclipse of 2011 Jun 15" (PDF). NASA. Retrieved 15 November 2024.
  4. ^ "Longest lunar eclipse for a decade turns moon blood red", Terry Brown. Clare Peddie. Herald Sun. 16 June 2011. Accessed 15 June 2011
  5. ^ "Total Lunar Eclipse of 2011 Jun 15". EclipseWise.com. Retrieved 15 November 2024.
  6. ^ Listing of Eclipses of cycle 130
  7. ^ Mathematical Astronomy Morsels, Jean Meeus, p.110, Chapter 18, The half-saros

References

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  • Bao-Lin Liu, Canon of Lunar Eclipses 1500 B.C.-A.D. 3000, 1992
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Wikimedia Commons has media related to Lunar eclipse of 2011 June 15.
Webcast
  • The Central Lunar Eclipse was shown live through WEBCAST – By Sky Watchers Association of North Bengal(SWAN) Siliguri, West Bengal [1] or [2]
  • By Eclipse Chaser Athaenium New Delhi [3]
  • By Astronation.net [4] Archived 16 June 2011 at the Wayback Machine
  • By Ciclope group and Shelios [5]
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