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]
| Partial eclipse | |||||||||||||
_(cropped).jpg) Partiality as viewed from Taipei, Taiwan, 12:04 UTC | |||||||||||||
| Date | October 17, 2005 | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Gamma | 0.9796 | ||||||||||||
| Magnitude | 0.0645 | ||||||||||||
| Saros cycle | 146 (10 of 72) | ||||||||||||
| Partiality | 55 minutes, 58 seconds | ||||||||||||
| Penumbral | 259 minutes, 49 seconds | ||||||||||||
| |||||||||||||
Visibility
editThe 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
edit
Gallery
edit-
Akita City, Japan, 12:21 UTC
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Eclipse details
editShown below is a table displaying details about this particular solar eclipse. It describes various parameters pertaining to this eclipse.[4]
| 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
editThis 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.
| October 3 Descending node (new moon) |
October 17 Ascending node (full moon) |
|---|---|
| Annular solar eclipse Solar Saros 134 |
Partial lunar eclipse Lunar Saros 146 |
Related eclipses
editEclipses in 2005
edit- A hybrid solar eclipse on April 8.
- A penumbral lunar eclipse on April 24.
- An annular solar eclipse on October 3.
- A partial lunar eclipse on October 17.
Metonic
edit- Preceded by: Lunar eclipse of December 30, 2001
- Followed by: Lunar eclipse of August 6, 2009
Tzolkinex
edit- Preceded by: Lunar eclipse of September 6, 1998
- Followed by: Lunar eclipse of November 28, 2012
Half-Saros
edit- Preceded by: Solar eclipse of October 12, 1996
- Followed by: Solar eclipse of October 23, 2014
Tritos
edit- Preceded by: Lunar eclipse of November 18, 1994
- Followed by: Lunar eclipse of September 16, 2016
Lunar Saros 146
edit- Preceded by: Lunar eclipse of October 7, 1987
- Followed by: Lunar eclipse of October 28, 2023
Inex
edit- Preceded by: Lunar eclipse of November 6, 1976
- Followed by: Lunar eclipse of September 28, 2034
Triad
edit- Preceded by: Lunar eclipse of December 17, 1918
- Followed by: Lunar eclipse of August 17, 2092
Lunar eclipses of 2002–2005
edit| 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
editThis 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.
| 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
editA 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
edit
References
edit- ^ "October 17, 2005 Partial Lunar Eclipse". timeanddate. Retrieved 13 November 2024.
- ^ "Moon Distances for London, United Kingdom, England". timeanddate. Retrieved 13 November 2024.
- ^ "Partial Lunar Eclipse of 2005 Oct 17" (PDF). NASA. Retrieved 13 November 2024.
- ^ "Partial Lunar Eclipse of 2005 Oct 17". EclipseWise.com. Retrieved 13 November 2024.
- ^ Mathematical Astronomy Morsels, Jean Meeus, p.110, Chapter 18, The half-saros
External links
edit- http://www.hermit.org/eclipse/2005-10-17/
- 2005 Oct 17 chart: Eclipse Predictions by Fred Espenak, NASA/GSFC
- http://www.space.com/spacewatch/051014_lunar_eclipse.html
- https://web.archive.org/web/20090914132101/http://www.astronomy.org.au/ngn/media/client/factsheet_16.pdf
- Photos
- http://www.starrynightphotos.com/moon/partial_lunar_eclipse_2005.htm Kaituna, Wairarapa, New Zealand
- http://outdoors.webshots.com/album/479147839tyCCAg Taipei, Taiwan
- http://christys-adventuresinlearning.blogspot.com/2008/02/lunar-eclipse-2008.html Seoul, South Korea
