A partial lunar eclipse occurred at the Moon’s descending node of orbit on Thursday, July 5, 2001,[1] with an umbral magnitude of 0.4961. 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 3.7 days before apogee (on July 9, 2001, at 7:20 UTC), the Moon's apparent diameter was smaller.[2]
| Partial eclipse | |||||||||||||
 Hourly motion shown right to left | |||||||||||||
| Date | July 5, 2001 | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Gamma | −0.7287 | ||||||||||||
| Magnitude | 0.4961 | ||||||||||||
| Saros cycle | 139 (21 of 81) | ||||||||||||
| Partiality | 162 minutes, 52 seconds | ||||||||||||
| Penumbral | 322 minutes, 7 seconds | ||||||||||||
| |||||||||||||
Visibility
editThe eclipse was completely visible over east Asia, Australia, and Antarctica, seen rising over east Africa and west and central Asia and setting over western North America.[3]
|
 The moon's hourly motion across the Earth's shadow in the constellation of Sagittarius. |
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 | 1.54895 |
| Umbral Magnitude | 0.49614 |
| Gamma | −0.72871 |
| Sun Right Ascension | 06h59m16.1s |
| Sun Declination | +22°44'22.5" |
| Sun Semi-Diameter | 15'43.9" |
| Sun Equatorial Horizontal Parallax | 08.7" |
| Moon Right Ascension | 18h59m16.6s |
| Moon Declination | -23°24'20.1" |
| Moon Semi-Diameter | 14'56.6" |
| Moon Equatorial Horizontal Parallax | 0°54'50.4" |
| ΔT | 64.2 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.
| June 21 Ascending node (new moon) |
July 5 Descending node (full moon) |
|---|---|
 |
|
| Total solar eclipse Solar Saros 127 |
Partial lunar eclipse Lunar Saros 139 |
Related eclipses
editEclipses in 2001
edit- A total lunar eclipse on January 9.
- A total solar eclipse on June 21.
- A partial lunar eclipse on July 5.
- An annular solar eclipse on December 14.
- A penumbral lunar eclipse on December 30.
Metonic
edit- Preceded by: Lunar eclipse of September 16, 1997
- Followed by: Lunar eclipse of April 24, 2005
Tzolkinex
edit- Preceded by: Lunar eclipse of May 25, 1994
- Followed by: Lunar eclipse of August 16, 2008
Half-Saros
edit- Preceded by: Solar eclipse of June 30, 1992
- Followed by: Solar eclipse of July 11, 2010
Tritos
edit- Preceded by: Lunar eclipse of August 6, 1990
- Followed by: Lunar eclipse of June 4, 2012
Lunar Saros 139
edit- Preceded by: Lunar eclipse of June 25, 1983
- Followed by: Lunar eclipse of July 16, 2019
Inex
edit- Preceded by: Lunar eclipse of July 26, 1972
- Followed by: Lunar eclipse of June 15, 2030
Triad
edit- Preceded by: Lunar eclipse of September 4, 1914
- Followed by: Lunar eclipse of May 5, 2088
Lunar eclipses of 1998–2002
edit| Lunar eclipse series sets from 1998–2002 | ||||||||
|---|---|---|---|---|---|---|---|---|
| Descending node | Ascending node | |||||||
| Saros | Date Viewing |
Type Chart |
Gamma | Saros | Date Viewing |
Type Chart |
Gamma | |
| 109 | 1998 Aug 08
|
penumbral
|
1.4876 | 114 | 1999 Jan 31
|
penumbral
|
−1.0190 | |
| 119 | 1999 Jul 28
|
partial
|
0.7863 | 124.jpg)
|
2000 Jan 21
|
total
|
−0.2957 | |
| 129 | 2000 Jul 16
|
total
|
0.0302 | 134_(cropped).jpg)
|
2001 Jan 09
|
total
|
0.3720 | |
| 139 | 2001 Jul 05
|
partial
|
−0.7287 | 144 | 2001 Dec 30
|
penumbral
|
1.0732 | |
| 149 | 2002 Jun 24
|
penumbral
|
−1.4440 | |||||
| Last set | 1998 Sep 06 | Last set | 1998 Mar 13 | |||||
| Next set | 2002 May 26 | Next set | 2002 Nov 20 | |||||
Saros 139
editLunar Saros series 139, repeating every 18 years and 11 days, has a total of 79 lunar eclipse events including 42 umbral lunar eclipses (15 partial lunar eclipses and 27 total lunar eclipses)..
| Greatest | First | |||
|---|---|---|---|---|
The greatest eclipse of the series will occur on 2199 Nov 02, lasting 102 minutes.[5] |
Penumbral | Partial | Total | Central |
| 1658 Dec 09 | 1947 Jun 03 | 2073 Aug 17 | 2109 Sep 09 | |
| Last | ||||
| Central | Total | Partial | Penumbral | |
| 2488 Apr 26 | 2542 May 30 | 2686 Aug 25 | 3065 Apr 13 | |
| 1911 May 13 | 1929 May 23 | 1947 Jun 03 | |||
|
|
|
|
|
|
| 1965 Jun 14 | 1983 Jun 25 | 2001 Jul 05 | |||
|
|
|
|
|
|
| 2019 Jul 16 | 2037 Jul 27 | 2055 Aug 07 | |||
|
|
|
|
|
|
| 2073 Aug 17 | 2091 Aug 29 | ||||
Half-Saros cycle
editA lunar eclipse will be preceded and followed by solar eclipses by 9 years and 5.5 days (a half saros).[6] This lunar eclipse is related to two total solar eclipses of Solar Saros 146.
| June 30, 1992 | July 11, 2010 |
|---|---|
|
|
See also
editReferences
edit- ^ "July 5–6, 2001 Partial Lunar Eclipse". timeanddate. Retrieved 12 November 2024.
- ^ "Moon Distances for London, United Kingdom, England". timeanddate. Retrieved 12 November 2024.
- ^ "Partial Lunar Eclipse of 2001 Jul 05" (PDF). NASA. Retrieved 12 November 2024.
- ^ "Partial Lunar Eclipse of 2001 Jul 05". EclipseWise.com. Retrieved 12 November 2024.
- ^ Listing of Eclipses of cycle 139
- ^ Mathematical Astronomy Morsels, Jean Meeus, p.110, Chapter 18, The half-saros
External links
edit- Saros cycle 139
- 2001 Jul 05 chart: Eclipse Predictions by Fred Espenak, NASA/GSFC
 | This lunar eclipse-related article is a stub. You can help Wikipedia by expanding it. |