# January 2001 lunar eclipse

A total lunar eclipse occurred at the Moon’s ascending node of orbit on Tuesday, January 9, 2001, with an umbral magnitude of 1.1902. 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. Occurring only about 8 hours before perigee (on January 10, 2001, at 4:00 UTC), the Moon's apparent diameter was larger.

## Visibility

The eclipse was completely visible over Africa, Europe, and Asia, seen rising over eastern and northern North America and eastern South America and setting over Australia and the western Pacific Ocean.
| | Hourly motion shown right to left |
| The Moon passed straight through the center of the Earth's shadow at the descending node in Gemini. ||

## Eclipse details

Shown below is a table displaying details about this particular solar eclipse. It describes various parameters pertaining to this eclipse.
January 9, 2001 Lunar Eclipse Parameters :
| Parameter | Value |
| Penumbral Magnitude | 2.16314 |
| Umbral Magnitude | 1.19022 |
| Gamma | 0.37198 |
| Sun Right Ascension | 19h25m03.5s |
| Sun Declination | -21°59'58.3" |
| Sun Semi-Diameter | 16'15.9" |
| Sun Equatorial Horizontal Parallax | 08.9" |
| Moon Right Ascension | 07h25m08.0s |
| Moon Declination | +22°22'46.0" |
| Moon Semi-Diameter | 16'43.0" |
| Moon Equatorial Horizontal Parallax | 1°01'21.1" |
| ΔT | 64.1 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 December 2000–January 2001 :
| December 25 Descending node (new moon) | January 9 Ascending node (full moon) |
| Partial solar eclipse Solar Saros 122 | Total lunar eclipse Lunar Saros 134 |

## 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 March 24, 1997
* Followed by: Lunar eclipse of October 28, 2004

### Tzolkinex

* Preceded by: Lunar eclipse of November 29, 1993
* Followed by: Lunar eclipse of February 21, 2008

### Half-Saros

* Preceded by: Solar eclipse of January 4, 1992
* Followed by: Solar eclipse of January 15, 2010

### Tritos

* Preceded by: Lunar eclipse of February 9, 1990
* Followed by: Lunar eclipse of December 10, 2011

### Lunar Saros 134

* Preceded by: Lunar eclipse of December 30, 1982
* Followed by: Lunar eclipse of January 21, 2019

### Inex

* Preceded by: Lunar eclipse of January 30, 1972
* Followed by: Lunar eclipse of December 20, 2029

### Triad

* Preceded by: Lunar eclipse of March 12, 1914
* Followed by: Lunar eclipse of November 10, 2087

### 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 134

This eclipse is a part of Saros series 134, repeating every 18 years, 11 days, and containing 72 events. The series started with a penumbral lunar eclipse on April 1, 1550. It contains partial eclipses from July 7, 1694 through October 13, 1856; total eclipses from October 25, 1874 through July 26, 2325; and a second set of partial eclipses from August 7, 2343 through November 12, 2505. The series ends at member 72 as a penumbral eclipse on May 28, 2830.
The longest duration of totality will be produced by member 38 at 100 minutes, 23 seconds on May 22, 2217. All eclipses in this series occur at the Moon’s ascending node of orbit.
| Greatest | First | First | First | First |
| The greatest eclipse of the series will occur on 2217 May 22, lasting 100 minutes, 23 seconds. | Penumbral | Partial | Total | Central |
| The greatest eclipse of the series will occur on 2217 May 22, lasting 100 minutes, 23 seconds. | 1550 Apr 01 | 1694 Jul 07 | 1874 Oct 25 | 2127 Mar 28 |
| Last ||||
| The greatest eclipse of the series will occur on 2217 May 22, lasting 100 minutes, 23 seconds. | Central | Total | Partial | Penumbral |
| The greatest eclipse of the series will occur on 2217 May 22, lasting 100 minutes, 23 seconds. | 2289 Jul 04 | 2325 Jul 26 | 2505 Nov 12 | 2830 May 28 |
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 15–37 occur between 1801 and 2200: :
| 15 | 15 | 16 | 16 | 17 | 17 |
| 1802 Sep 11 | 1802 Sep 11 | 1820 Sep 22 | 1820 Sep 22 | 1838 Oct 03 | 1838 Oct 03 |
| 18 | 18 | 19 | 19 | 20 | 20 |
| 1856 Oct 13 | 1856 Oct 13 | 1874 Oct 25 | 1874 Oct 25 | 1892 Nov 04 | 1892 Nov 04 |
| 21 | 21 | 22 | 22 | 23 | 23 |
| 1910 Nov 17 | 1910 Nov 17 | 1928 Nov 27 | 1928 Nov 27 | 1946 Dec 08 | 1946 Dec 08 |
| 24 | 24 | 25 | 25 | 26 | 26 |
| 1964 Dec 19 | 1964 Dec 19 | 1982 Dec 30 | 1982 Dec 30 | 2001 Jan 09 | 2001 Jan 09 |
| 27 | 27 | 28 | 28 | 29 | 29 |
| 2019 Jan 21 | 2019 Jan 21 | 2037 Jan 31 | 2037 Jan 31 | 2055 Feb 11 | 2055 Feb 11 |
| 30 | 30 | 31 | 31 | 32 | 32 |
| 2073 Feb 22 | 2073 Feb 22 | 2091 Mar 05 | 2091 Mar 05 | 2109 Mar 17 | 2109 Mar 17 |
| 33 | 33 | 34 | 34 | 35 | 35 |
| 2127 Mar 28 | 2127 Mar 28 | 2145 Apr 07 | 2145 Apr 07 | 2163 Apr 19 | 2163 Apr 19 |
| 36 | 36 | 37 | 37 |
| 2181 Apr 29 | 2181 Apr 29 | 2199 May 10 | 2199 May 10 |

### 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 2200 :
| 1804 Jul 22 (Saros 116) | 1804 Jul 22 (Saros 116) | 1815 Jun 21 (Saros 117) | 1815 Jun 21 (Saros 117) | 1826 May 21 (Saros 118) | 1826 May 21 (Saros 118) | 1837 Apr 20 (Saros 119) | 1837 Apr 20 (Saros 119) | 1848 Mar 19 (Saros 120) | 1848 Mar 19 (Saros 120) |
| 1859 Feb 17 (Saros 121) | 1859 Feb 17 (Saros 121) | 1870 Jan 17 (Saros 122) | 1870 Jan 17 (Saros 122) | 1880 Dec 16 (Saros 123) | 1880 Dec 16 (Saros 123) | 1891 Nov 16 (Saros 124) | 1891 Nov 16 (Saros 124) | 1902 Oct 17 (Saros 125) | 1902 Oct 17 (Saros 125) |
| 1913 Sep 15 (Saros 126) | 1913 Sep 15 (Saros 126) | 1924 Aug 14 (Saros 127) | 1924 Aug 14 (Saros 127) | 1935 Jul 16 (Saros 128) | 1935 Jul 16 (Saros 128) | 1946 Jun 14 (Saros 129) | 1946 Jun 14 (Saros 129) | 1957 May 13 (Saros 130) | 1957 May 13 (Saros 130) |
| 1968 Apr 13 (Saros 131) | 1968 Apr 13 (Saros 131) | 1979 Mar 13 (Saros 132) | 1979 Mar 13 (Saros 132) | 1990 Feb 09 (Saros 133) | 1990 Feb 09 (Saros 133) | 2001 Jan 09 (Saros 134) | 2001 Jan 09 (Saros 134) | 2011 Dec 10 (Saros 135) | 2011 Dec 10 (Saros 135) |
| 2022 Nov 08 (Saros 136) | 2022 Nov 08 (Saros 136) | 2033 Oct 08 (Saros 137) | 2033 Oct 08 (Saros 137) | 2044 Sep 07 (Saros 138) | 2044 Sep 07 (Saros 138) | 2055 Aug 07 (Saros 139) | 2055 Aug 07 (Saros 139) | 2066 Jul 07 (Saros 140) | 2066 Jul 07 (Saros 140) |
| 2077 Jun 06 (Saros 141) | 2077 Jun 06 (Saros 141) | 2088 May 05 (Saros 142) | 2088 May 05 (Saros 142) | 2099 Apr 05 (Saros 143) | 2099 Apr 05 (Saros 143) | 2110 Mar 06 (Saros 144) | 2110 Mar 06 (Saros 144) | 2121 Feb 02 (Saros 145) | 2121 Feb 02 (Saros 145) |
| 2132 Jan 02 (Saros 146) | 2132 Jan 02 (Saros 146) | 2142 Dec 03 (Saros 147) | 2142 Dec 03 (Saros 147) | 2153 Nov 01 (Saros 148) | 2153 Nov 01 (Saros 148) | 2164 Sep 30 (Saros 149) | 2164 Sep 30 (Saros 149) | 2175 Aug 31 (Saros 150) | 2175 Aug 31 (Saros 150) |
| 2186 Jul 31 (Saros 151) | 2186 Jul 31 (Saros 151) | 2197 Jun 29 (Saros 152) | 2197 Jun 29 (Saros 152) |

### 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 May 11 (Saros 128) | 1827 May 11 (Saros 128) | 1856 Apr 20 (Saros 129) | 1856 Apr 20 (Saros 129) | 1885 Mar 30 (Saros 130) | 1885 Mar 30 (Saros 130) |
| 1914 Mar 12 (Saros 131) | 1914 Mar 12 (Saros 131) | 1943 Feb 20 (Saros 132) | 1943 Feb 20 (Saros 132) | 1972 Jan 30 (Saros 133) | 1972 Jan 30 (Saros 133) |
| 2001 Jan 09 (Saros 134) | 2001 Jan 09 (Saros 134) | 2029 Dec 20 (Saros 135) | 2029 Dec 20 (Saros 135) | 2058 Nov 30 (Saros 136) | 2058 Nov 30 (Saros 136) |
| 2087 Nov 10 (Saros 137) | 2087 Nov 10 (Saros 137) | 2116 Oct 21 (Saros 138) | 2116 Oct 21 (Saros 138) | 2145 Sep 30 (Saros 139) | 2145 Sep 30 (Saros 139) |
| 2174 Sep 11 (Saros 140) ||

### 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 annular solar eclipses of Solar Saros 141.
| January 4, 1992 | January 15, 2010 |