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October 2005 lunar eclipse

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October 2005 lunar eclipse
Partial eclipse
Partiality as viewed from Taipei, Taiwan, 12:04 UTC
DateOctober 17, 2005
Gamma0.9796
Magnitude0.0645
Saros cycle146 (10 of 72)
Partiality55 minutes, 58 seconds
Penumbral259 minutes, 49 seconds
Contacts (UTC)
P19:53:27
U111:35:18
Greatest12:03:22
U412:31:16
P414:13:16

A partial lunar eclipse occurred at the Moon’s ascending node of orbit on Monday, October 17, 2005,[1] with an umbral magnitude of 0.0645. 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 3.1 days before perigee (on October 14, 2005, at 10:00 UTC), the Moon's apparent diameter was larger.[2]

Visibility

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The eclipse was completely visible much of Australia, east Asia, and western North America, seen rising over much of Asia and setting over much of North America and western South America.[3]


Hourly motion shown right to left

The Moon's hourly motion across the Earth's shadow in the constellation of Pisces.

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.[4]

October 17, 2005 Lunar Eclipse Parameters
Parameter Value
Penumbral Magnitude 1.06046
Umbral Magnitude 0.06446
Gamma 0.97960
Sun Right Ascension 13h29m41.7s
Sun Declination -09°23'29.0"
Sun Semi-Diameter 16'03.1"
Sun Equatorial Horizontal Parallax 08.8"
Moon Right Ascension 01h27m54.2s
Moon Declination +10°15'01.0"
Moon Semi-Diameter 16'06.9"
Moon Equatorial Horizontal Parallax 0°59'08.7"
ΔT 64.8 s

Eclipse season

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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 October 2005
October 3
Descending node (new moon)
October 17
Ascending node (full moon)
Annular solar eclipse
Solar Saros 134
Partial lunar eclipse
Lunar Saros 146
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Eclipses in 2005

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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 146

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Inex

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Triad

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Lunar eclipses of 2002–2005

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Lunar eclipse series sets from 2002–2005
Descending node   Ascending node
Saros
Photo
Date
View
Type
Chart
Gamma Saros
Photo
Date
View
Type
Chart
Gamma
111 2002 May 26
penumbral
1.1759 116 2002 Nov 20
penumbral
−1.1127
121
2003 May 16
total
0.4123 126
2003 Nov 09
total
−0.4319
131
2004 May 04
total
−0.3132 136
2004 Oct 28
total
0.2846
141 2005 Apr 24
penumbral
−1.0885 146
2005 Oct 17
partial
0.9796
Last set 2002 Jun 24 Last set 2001 Dec 30
Next set 2006 Mar 14 Next set 2006 Sep 07


Metonic series

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This eclipse is the last of four Metonic cycle lunar eclipses on the same date, 17–18 October, each separated by 19 years:

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 1948–2005
Descending node   Ascending node
Saros Date Type Saros Date Type
111 1948 Apr 23 Partial 116 1948 Oct 18 Penumbral
121 1967 Apr 24 Total 126 1967 Oct 18 Total
131 1986 Apr 24 Total 136 1986 Oct 17 Total
141 2005 Apr 24 Penumbral 146 2005 Oct 17 Partial

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).[5] This lunar eclipse is related to two partial solar eclipses of Solar Saros 153.

October 12, 1996 October 23, 2014

See also

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References

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  1. ^ "October 17, 2005 Partial Lunar Eclipse". timeanddate. Retrieved 13 November 2024.
  2. ^ "Moon Distances for London, United Kingdom, England". timeanddate. Retrieved 13 November 2024.
  3. ^ "Partial Lunar Eclipse of 2005 Oct 17" (PDF). NASA. Retrieved 13 November 2024.
  4. ^ "Partial Lunar Eclipse of 2005 Oct 17". EclipseWise.com. Retrieved 13 November 2024.
  5. ^ Mathematical Astronomy Morsels, Jean Meeus, p.110, Chapter 18, The half-saros
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