December 2011 lunar eclipse

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Template:Short description Script error: No such module "Unsubst". Template:Infobox lunar eclipse A total lunar eclipse occurred at the Moon’s descending node of orbit on Saturday, December 10, 2011,[1] with an umbral magnitude of 1.1076. 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 4.8 days after apogee (on December 5, 2011, at 20:10 UTC), the Moon's apparent diameter was smaller.[2]

Visibility

The eclipse was completely visible over east and northern Asia, Australia, and northern North America, seen rising over Europe and east and central Africa, and setting over North America.[3]

File:Lunar eclipse from moon-2011Dec10.png File:Lunar eclipse chart close-2011Dec10.png
Hourly motion shown right to left 		File:Lunar eclipse chart-2011Dec10.png
The Moon's hourly motion across the Earth's shadow in the constellation of Taurus.
File:Visibility Lunar Eclipse 2011-12-10.png
Visibility map


Images

File:2011-12-10 Lunar Eclipse Sketch.png
NASA chart of the eclipse

Gallery

Asia

Australia and Oceania Script error: No such module "Wide image".Script error: No such module "Check for unknown parameters".

Europe and Middle East

North America

Timing

Times for Australia

The eclipse occurred on Saturday evening in Australia. Eastern Daylight Saving Time: (+11:00 UTC)

  • Penumbral Eclipse Begins: 22:33:32 EDST
  • Partial Eclipse Begins: 23:45:42 EDST
  • Total Eclipse Begins: 01:06:16 EDST
  • Greatest Eclipse: 01:31:49 EDST
  • Total Eclipse Ends: 01:57:24 EDST
  • Partial Eclipse Ends: 03:17:58 EDST
  • Penumbral Eclipse Ends: 04:30:00 EDST

Times for India

The eclipse was visible from India in the evening, given in India Standard Time (UTC+5:30):

  • Penumbral eclipse begins (P1): 17:04 IST
  • Partial eclipse begins (U1): 18:16 IST
  • Total eclipse begins (U2): 19:36 IST
  • Mid-eclipse: 20:02 IST
  • Total eclipse ends (U3): 20:27 IST
  • Partial eclipse ends (U4): 21:48 IST
  • Penumbral eclipse ends (P4): 23:00 IST

Times for North America

The eclipse was visible on Saturday morning before sunrise over North America. For most locations, the moon set before full lunar eclipse. Only Alaska and northernmost Canada will be able to witness the entire event.

Contact North America UTC
AST
(UTC−9)		 PST
(UTC−8)		 MST
(UTC−7)		 CST
(UTC−6)		 EST
(UTC−5)
Penumbral begins (P1) 2:34 am 3:34 am 4:34 am 5:34 am 6:34 am 11:34
Partial begins (U1) 3:46 am 4:46 am 5:46 am 6:46 am 7:46 am 12:46
Totality begins (U2) 5:06 am 6:06 am 7:06 am 8:06 am 9:06 am 14:06
Mid-eclipse 5:32 am 6:32 am 7:32 am 8:32 am 9:32 am 14:32
Totality ends (U3) 5:57 am 6:57 am 7:57 am 8:57 am 9:57 am 14:57
Partial ends (U4) 7:18 am 8:18 am 9:18 am 10:18 am 11:18 am 16:18
Penumbral ends (P4) 8:30 am 9:30 am 10:30 am 11:30 am 12:30 pm 17:30
(Table entries are given a dark background for invisibility due to moonset)

Eclipse details

Shown below is a table displaying details about this particular lunar eclipse. It describes various parameters pertaining to this eclipse.[4]

December 10, 2011 Lunar Eclipse Parameters
Parameter Value
Penumbral Magnitude 2.18746
Umbral Magnitude 1.10757
Gamma −0.38819
Sun Right Ascension 17h08m35.0s
Sun Declination -22°54'38.7"
Sun Semi-Diameter 16'14.5"
Sun Equatorial Horizontal Parallax 08.9"
Moon Right Ascension 05h08m33.9s
Moon Declination +22°33'13.3"
Moon Semi-Diameter 15'02.4"
Moon Equatorial Horizontal Parallax 0°55'11.7"
ΔT 66.7 s

Eclipse season

Script error: No such module "Labelled list hatnote". 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.

Eclipse season of November–December 2011
November 25
Ascending node (new moon)
 December 10
Descending node (full moon)
File:SE2011Nov25P.png File:Lunar eclipse chart close-2011Dec10.png
Partial solar eclipse
Solar Saros 123		 Total lunar eclipse
Lunar Saros 135

Related eclipses

Eclipses in 2011

Metonic

Tzolkinex

Half-Saros

Tritos

Lunar Saros 135

Inex

Triad

Lunar eclipses of 2009–2013

Template:Lunar eclipse set 2009-2013

Saros 135

Template:Lunar Saros series 135

Tritos series

Template:Lunar Tritos series January 2001

Inex series

Template:Lunar Inex series December 2011

Half-Saros cycle

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 total solar eclipses of Solar Saros 142.

December 4, 2002 December 14, 2020
File:SE2002Dec04T.png File:SE2020Dec14T.png

See also

References

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  1. ↑ Script error: No such module "citation/CS1".
  2. ↑ Script error: No such module "citation/CS1".
  3. ↑ Script error: No such module "citation/CS1".
  4. ↑ Script error: No such module "citation/CS1".
  5. ↑ Mathematical Astronomy Morsels, Jean Meeus, p.110, Chapter 18, The half-saros

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External links

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Live Webcasts

Template:Lunar eclipses

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