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February 2008 lunar eclipse

February 2008 lunar eclipse
Total eclipse
Telescopic view, from North Billerica, Massachusetts at 3:25 UT, near greatest eclipse.
DateFebruary 21, 2008
Gamma−0.3992
Magnitude1.1081
Saros cycle133 (26 of 71)
Totality49 minutes, 46 seconds
Partiality205 minutes, 28 seconds
Penumbral339 minutes, 3 seconds
Contacts (UTC)
P100:36:34
U101:43:17
U203:01:09
Greatest03:26:03
U303:50:55
U405:08:45
P406:15:37

A total lunar eclipse occurred at the Moon’s descending node of orbit on Thursday, February 21, 2008,[1] with an umbral magnitude of 1.1081. 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. The Moon's apparent diameter was near the average diameter because it occurred 7.2 days after perigee (on February 13, 2008, at 20:00 UTC) and 6.8 days before apogee (on February 27, 2008, at 20:30 UTC).[2]

Visibility

The eclipse was completely visible over North and South America, west Africa, and western Europe, seen rising over much of the Pacific Ocean and setting over much of Africa, eastern Europe, and west, central, and south Asia.[3]

The bright star Regulus of Leo and the planet Saturn were prominent very near the Moon during the total eclipse portion. Shortly before the eclipse began, Regulus was occulted by the Moon in parts of the far Southern Atlantic Ocean and Antarctica.


Hourly motion shown right to left
The Moon's hourly motion across the Earth's shadow in the constellation of Leo.

Visibility map

Timing

The Moon entered the penumbral shadow at 0:36 UTC, and the umbral shadow at 1:43. Totality lasted for 50 minutes, between 3:01 and 3:51. The Moon left the umbra shadow at 5:09 and left the penumbra shadow at 6:16.[4]

Total Lunar Eclipse[5]
Event North and South America Europe and Africa
Evening of February 20th Morning of February 21st
AKST
(-9h) 		PST
(-8h) 		MST
(-7h) 		CST
(-6h) 		EST
(-5h) 		AST
(-4h) 		GMT
(0h) 		CET
(+1h) 		EET
(+2h)
P1 Penumbral began Under Horizon Under Horizon Under Horizon 18:36 19:36 20:36 0:36 1:36 2:36
U1 Partial began Under Horizon Under Horizon 18:43 19:43 20:43 21:43 1:43 2:43 3:43
U2 Total began Under Horizon 19:01 20:01 21:01 22:01 23:01 3:01 4:01 5:01
Mid-eclipse 18:26 19:26 20:26 21:26 22:26 23:26 3:26 4:26 5:26
U3 Total ended 18:51 19:51 20:51 21:51 22:51 23:51 3:51 4:51 Set
U4 Partial ended 20:09 21:09 22:09 23:09 0:09 1:09 5:09 Set Set

Images


These simulated views of the Earth from the center of the Moon during the lunar eclipse show where the eclipse is visible on Earth.
NASA chart of the eclipse

Composites


Eclipse observed from Sandim, Portugal. 41°02′22″N 8°30′50″W / 41.03944°N 8.51389°W / 41.03944; -8.51389.
Eclipse observed from Regina, Saskatchewan. Each image is roughly taken 5 minutes apart.

Images taken in 3-5 minute Intervals - from Bradley, Illinois.
Eclipse observed from Halton Hills, Ontario. From 01:47 to 03:15 UTC, each image is roughly taken 5min apart.

Eclipse observed from Winnipeg, Manitoba

Lunar eclipse observed from Burlington, Ontario

Observed from Baltimore, Maryland, from 2:30 to 3:01 UTC. Lunar north is near left.

North America

Canada

  • Eclipse Observed from Burlington, Ontario, at 2:00 UTC.
    Eclipse Observed from Burlington, Ontario, at 2:00 UTC.
  • Eclipse observed from Victoria, British Columbia, at 2:49 UTC. Lunar north is near top-left.
    Eclipse observed from Victoria, British Columbia, at 2:49 UTC. Lunar north is near top-left.
  • Eclipse observed from Victoria, British Columbia at 2:56 UTC, just prior to total. Lunar north is near top-left.
    Eclipse observed from Victoria, British Columbia at 2:56 UTC, just prior to total. Lunar north is near top-left.
  • Eclipse observed from Salmon Arm, Canada at 3:11 UTC. Lunar north is near top-left.
    Eclipse observed from Salmon Arm, Canada at 3:11 UTC. Lunar north is near top-left.
  • Eclipse observed from Burlington, Ontario at 4:05 UTC.
    Eclipse observed from Burlington, Ontario at 4:05 UTC.

USA (west)

USA (east)

South America

Europe and Africa

Eclipse details

Shown below is a table displaying details about this particular solar eclipse. It describes various parameters pertaining to this eclipse.[6]

February 21, 2008 Lunar Eclipse Parameters
Parameter Value
Penumbral Magnitude 2.14698
Umbral Magnitude 1.10809
Gamma -0.39923
Sun Right Ascension 22h15m30.0s
Sun Declination -10°48'31.3"
Sun Semi-Diameter 16'10.5"
Sun Equatorial Horizontal Parallax 08.9"
Moon Right Ascension 10h14m48.5s
Moon Declination +10°28'07.6"
Moon Semi-Diameter 15'34.2"
Moon Equatorial Horizontal Parallax 0°57'08.5"
ΔT 65.5 s

Eclipse season

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.

Eclipse season of February 2008
February 7
Ascending node (new moon)
 February 21
Descending node (full moon)
Annular solar eclipse
Solar Saros 121		 Total lunar eclipse
Lunar Saros 133

Eclipses in 2008

Metonic

Tzolkinex

Half-Saros

Tritos

Lunar Saros 133

Inex

Triad

Lunar eclipses of 2006–2009

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.[7]

The lunar eclipses on July 7, 2009 (penumbral) and December 31, 2009 (partial) occur in the next lunar year eclipse set.

Lunar eclipse series sets from 2006 to 2009
Descending node   Ascending node
Saros Date
Viewing 		Type
Chart 		Gamma Saros Date
Viewing 		Type
Chart 		Gamma
113
 2006 Mar 14
 Penumbral
 1.0211 118
 2006 Sep 7
 Partial
 −0.9262
123
 2007 Mar 03
 Total
 0.3175 128
 2007 Aug 28
 Total
 −0.2146
133
 2008 Feb 21
 Total
 −0.3992 138
 2008 Aug 16
 Partial
 0.5646
143
 2009 Feb 09
 Penumbral
 −1.0640 148
 2009 Aug 06
 Penumbral
 1.3572

Saros 133

This eclipse is a part of Saros series 133, repeating every 18 years, 11 days, and containing 71 events. The series started with a penumbral lunar eclipse on May 13, 1557. It contains partial eclipses from August 7, 1683 through December 17, 1899; total eclipses from December 28, 1917 through August 3, 2278; and a second set of partial eclipses from August 14, 2296 through March 11, 2639. The series ends at member 71 as a penumbral eclipse on June 29, 2819.

The longest duration of totality will be produced by member 35 at 101 minutes, 41 seconds on May 30, 2170. All eclipses in this series occur at the Moon’s descending node of orbit.[8]

Greatest First
The greatest eclipse of the series will occur on 2170 May 30, lasting 101 minutes, 41 seconds.[9] Penumbral Partial Total Central
1557 May 13
 1683 Aug 07
 1917 Dec 28
 2098 Apr 15
Last
Central Total Partial Penumbral
2224 Jul 01
 2278 Aug 03
 2639 Mar 11
 2819 Jun 29

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.

Metonic series

This is the fourth of five Metonic lunar eclipses.

The Metonic cycle repeats nearly exactly every 19 years and represents a Saros cycle plus one lunar year. Because it occurs on the same calendar date, the Earth's shadow will in nearly the same location relative to the background stars.

Metonic lunar eclipse sets 1951–2027
Descending node   Ascending node
Saros Date Type Saros Date Type
103 1951 Feb 21.88 Penumbral 108 1951 Aug 17.13 Penumbral
113 1970 Feb 21.35 Partial 118 1970 Aug 17.14 Partial
123 1989 Feb 20.64 Total 128 1989 Aug 17.13 Total
133 2008 Feb 21.14 Total 138 2008 Aug 16.88 Partial
143 2027 Feb 20.96 Penumbral 148 2027 Aug 17.30 Penumbral

Half-Saros cycle

A lunar eclipse will be preceded and followed by solar eclipses by 9 years and 5.5 days (a half saros).[10] This lunar eclipse is related to two annular solar eclipses of Solar Saros 140.

February 16, 1999 February 26, 2017

See also

Notes

  1. ^ "February 20–21, 2008 Total Lunar Eclipse (Blood Moon)". timeanddate. Retrieved 14 November 2024.
  2. ^ "Moon Distances for London, United Kingdom, England". timeanddate. Retrieved 14 November 2024.
  3. ^ "Total Lunar Eclipse of 2008 Feb 21" (PDF). NASA. Retrieved 14 November 2024.
  4. ^ "Total lunar eclipse of 2008 Feb 21" (PDF). NASA. 21 February 2008. Eclipse Predictions by Fred Espenak, NASA's GSFC
  5. ^ "NASA - Total Lunar Eclipse: February 20, 2008". 2008. Archived from the original on 21 February 2008. Retrieved 21 February 2008.
  6. ^ "Total Lunar Eclipse of 2008 Feb 21". EclipseWise.com. Retrieved 14 November 2024.
  7. ^ van Gent, R.H. "Solar- and Lunar-Eclipse Predictions from Antiquity to the Present". A Catalogue of Eclipse Cycles. Utrecht University. Retrieved 6 October 2018.
  8. ^ "NASA - Catalog of Lunar Eclipses of Saros 133". eclipse.gsfc.nasa.gov.
  9. ^ Listing of Eclipses of series 133
  10. ^ Mathematical Astronomy Morsels, Jean Meeus, p.110, Chapter 18, The half-saros
Quelle: http://en.wikipedia.org/wiki/February_2008_lunar_eclipse