# July 2001 lunar eclipse

A partial lunar eclipse occurred at the Moon’s descending node of orbit on Thursday, July 5, 2001, 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.

## Visibility

The 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.
* The moon's hourly motion across the Earth's shadow in the constellation of Sagittarius.

## Eclipse details

Shown below is a table displaying details about this particular solar eclipse. It describes various parameters pertaining to this eclipse.
July 5, 2001 Lunar Eclipse Parameters :
| 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

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 June–July 2001 :
| 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
### Eclipses in 2001

* 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

* Preceded by: Lunar eclipse of September 16, 1997
* Followed by: Lunar eclipse of April 24, 2005

### Tzolkinex

* Preceded by: Lunar eclipse of May 25, 1994
* Followed by: Lunar eclipse of August 16, 2008

### Half-Saros

* Preceded by: Solar eclipse of June 30, 1992
* Followed by: Solar eclipse of July 11, 2010

### Tritos

* Preceded by: Lunar eclipse of August 6, 1990
* Followed by: Lunar eclipse of June 4, 2012

### Lunar Saros 139

* Preceded by: Lunar eclipse of June 25, 1983
* Followed by: Lunar eclipse of July 16, 2019

### Inex

* Preceded by: Lunar eclipse of July 26, 1972
* Followed by: Lunar eclipse of June 15, 2030

### Triad

* Preceded by: Lunar eclipse of September 4, 1914
* Followed by: Lunar eclipse of May 5, 2088

### Lunar eclipses of 1998–2002

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.
The penumbral lunar eclipses on March 13, 1998 and September 6, 1998 occur in the previous lunar year eclipse set, and the penumbral lunar eclipses on May 26, 2002 and November 20, 2002 occur in the next lunar year eclipse set.
Lunar eclipse series sets from 1998 to 2002 :
| Descending node | Descending node | Descending node | Descending node | Ascending node | Ascending node | Ascending 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 | 2000 Jan 21 | Total | −0.2957 |
| 129 | 2000 Jul 16 | Total | 0.0302 | 134 | 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 |

### Saros 139

This eclipse is a part of Saros series 139, repeating every 18 years, 11 days, and containing 79 events. The series started with a penumbral lunar eclipse on December 9, 1658. It contains partial eclipses from June 3, 1947 through August 7, 2055; total eclipses from August 17, 2073 through May 30, 2542; and a second set of partial eclipses from June 9, 2560 through August 25, 2686. The series ends at member 75 as a penumbral eclipse on April 13, 3065.
The longest duration of totality will be produced by member 31 at 102 minutes, 39 seconds on November 2, 2199. All eclipses in this series occur at the Moon’s descending node of orbit.
| Greatest | First | First | First | First |
| The greatest eclipse of the series will occur on 2199 Nov 02, lasting 102 minutes, 39 seconds. | Penumbral | Partial | Total | Central |
| The greatest eclipse of the series will occur on 2199 Nov 02, lasting 102 minutes, 39 seconds. | 1658 Dec 09 | 1947 Jun 03 | 2073 Aug 17 | 2109 Sep 09 |
| Last ||||
| The greatest eclipse of the series will occur on 2199 Nov 02, lasting 102 minutes, 39 seconds. | Central | Total | Partial | Penumbral |
| The greatest eclipse of the series will occur on 2199 Nov 02, lasting 102 minutes, 39 seconds. | 2488 Apr 26 | 2542 May 30 | 2686 Aug 25 | 3065 Apr 13 |
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.
Series members 9–31 occur between 1801 and 2200: :
| 9 | 9 | 10 | 10 | 11 | 11 |
| 1803 Mar 08 | 1803 Mar 08 | 1821 Mar 18 | 1821 Mar 18 | 1839 Mar 30 | 1839 Mar 30 |
| 12 | 12 | 13 | 13 | 14 | 14 |
| 1857 Apr 09 | 1857 Apr 09 | 1875 Apr 20 | 1875 Apr 20 | 1893 Apr 30 | 1893 Apr 30 |
| 15 | 15 | 16 | 16 | 17 | 17 |
| 1911 May 13 | 1911 May 13 | 1929 May 23 | 1929 May 23 | 1947 Jun 03 | 1947 Jun 03 |
| 18 | 18 | 19 | 19 | 20 | 20 |
| 1965 Jun 14 | 1965 Jun 14 | 1983 Jun 25 | 1983 Jun 25 | 2001 Jul 05 | 2001 Jul 05 |
| 21 | 21 | 22 | 22 | 23 | 23 |
| 2019 Jul 16 | 2019 Jul 16 | 2037 Jul 27 | 2037 Jul 27 | 2055 Aug 07 | 2055 Aug 07 |
| 24 | 24 | 25 | 25 | 26 | 26 |
| 2073 Aug 17 | 2073 Aug 17 | 2091 Aug 29 | 2091 Aug 29 | 2109 Sep 09 | 2109 Sep 09 |
| 27 | 27 | 28 | 28 | 29 | 29 |
| 2127 Sep 20 | 2127 Sep 20 | 2145 Sep 30 | 2145 Sep 30 | 2163 Oct 12 | 2163 Oct 12 |
| 30 | 30 | 31 | 31 |
| 2181 Oct 22 | 2181 Oct 22 | 2199 Nov 02 | 2199 Nov 02 |

### Tritos series

This eclipse is a part of a tritos cycle, repeating at alternating nodes every 135 synodic months (≈ 3986.63 days, or 11 years minus 1 month). Their appearance and longitude are irregular due to a lack of synchronization with the anomalistic month (period of perigee), but groupings of 3 tritos cycles (≈ 33 years minus 3 months) come close (≈ 434.044 anomalistic months), so eclipses are similar in these groupings.
Series members between 1801 and 2187 :
| 1805 Jan 15 (Saros 121) | 1805 Jan 15 (Saros 121) | 1815 Dec 16 (Saros 122) | 1815 Dec 16 (Saros 122) | 1826 Nov 14 (Saros 123) | 1826 Nov 14 (Saros 123) | 1837 Oct 13 (Saros 124) | 1837 Oct 13 (Saros 124) | 1848 Sep 13 (Saros 125) | 1848 Sep 13 (Saros 125) |
| 1859 Aug 13 (Saros 126) | 1859 Aug 13 (Saros 126) | 1870 Jul 12 (Saros 127) | 1870 Jul 12 (Saros 127) | 1881 Jun 12 (Saros 128) | 1881 Jun 12 (Saros 128) | 1892 May 11 (Saros 129) | 1892 May 11 (Saros 129) | 1903 Apr 12 (Saros 130) | 1903 Apr 12 (Saros 130) |
| 1914 Mar 12 (Saros 131) | 1914 Mar 12 (Saros 131) | 1925 Feb 08 (Saros 132) | 1925 Feb 08 (Saros 132) | 1936 Jan 08 (Saros 133) | 1936 Jan 08 (Saros 133) | 1946 Dec 08 (Saros 134) | 1946 Dec 08 (Saros 134) | 1957 Nov 07 (Saros 135) | 1957 Nov 07 (Saros 135) |
| 1968 Oct 06 (Saros 136) | 1968 Oct 06 (Saros 136) | 1979 Sep 06 (Saros 137) | 1979 Sep 06 (Saros 137) | 1990 Aug 06 (Saros 138) | 1990 Aug 06 (Saros 138) | 2001 Jul 05 (Saros 139) | 2001 Jul 05 (Saros 139) | 2012 Jun 04 (Saros 140) | 2012 Jun 04 (Saros 140) |
| 2023 May 05 (Saros 141) | 2023 May 05 (Saros 141) | 2034 Apr 03 (Saros 142) | 2034 Apr 03 (Saros 142) | 2045 Mar 03 (Saros 143) | 2045 Mar 03 (Saros 143) | 2056 Feb 01 (Saros 144) | 2056 Feb 01 (Saros 144) | 2066 Dec 31 (Saros 145) | 2066 Dec 31 (Saros 145) |
| 2077 Nov 29 (Saros 146) | 2077 Nov 29 (Saros 146) | 2088 Oct 30 (Saros 147) | 2088 Oct 30 (Saros 147) | 2099 Sep 29 (Saros 148) | 2099 Sep 29 (Saros 148) | 2110 Aug 29 (Saros 149) | 2110 Aug 29 (Saros 149) | 2121 Jul 30 (Saros 150) | 2121 Jul 30 (Saros 150) |
| 2132 Jun 28 (Saros 151) | 2132 Jun 28 (Saros 151) | 2143 May 28 (Saros 152) | 2143 May 28 (Saros 152) | 2154 Apr 28 (Saros 153) | 2154 Apr 28 (Saros 153) | | | | |
| 2187 Jan 24 (Saros 156) ||

### Inex series

This eclipse is a part of the long period inex cycle, repeating at alternating nodes, every 358 synodic months (≈ 10,571.95 days, or 29 years minus 20 days). Their appearance and longitude are irregular due to a lack of synchronization with the anomalistic month (period of perigee). However, groupings of 3 inex cycles (≈ 87 years minus 2 months) comes close (≈ 1,151.02 anomalistic months), so eclipses are similar in these groupings.
Series members between 1801 and 2200 :
| 1827 Nov 03 (Saros 133) | 1827 Nov 03 (Saros 133) | 1856 Oct 13 (Saros 134) | 1856 Oct 13 (Saros 134) | 1885 Sep 24 (Saros 135) | 1885 Sep 24 (Saros 135) |
| 1914 Sep 04 (Saros 136) | 1914 Sep 04 (Saros 136) | 1943 Aug 15 (Saros 137) | 1943 Aug 15 (Saros 137) | 1972 Jul 26 (Saros 138) | 1972 Jul 26 (Saros 138) |
| 2001 Jul 05 (Saros 139) | 2001 Jul 05 (Saros 139) | 2030 Jun 15 (Saros 140) | 2030 Jun 15 (Saros 140) | 2059 May 27 (Saros 141) | 2059 May 27 (Saros 141) |
| 2088 May 05 (Saros 142) | 2088 May 05 (Saros 142) | 2117 Apr 16 (Saros 143) | 2117 Apr 16 (Saros 143) | 2146 Mar 28 (Saros 144) | 2146 Mar 28 (Saros 144) |
| 2175 Mar 07 (Saros 145) ||

### Half-Saros cycle

A lunar eclipse will be preceded and followed by solar eclipses by 9 years and 5.5 days (a half saros). This lunar eclipse is related to two total solar eclipses of Solar Saros 146.
| June 30, 1992 | July 11, 2010 |