A partial lunar eclipse occurred at the Moon’s ascending node of orbit on Friday, November 19, 2021,[2] with an umbral magnitude of 0.9760. 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 only about 12 hours before apogee (on November 20, 2021, at 21:10 UTC), the Moon's apparent diameter was smaller.[3]
| Partial eclipse | |||||||||||||
 Partiality as viewed from Starkville, Mississippi at maximum, 9:03 UTC | |||||||||||||
| Date | November 19, 2021 | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Gamma | −0.4552[1] | ||||||||||||
| Magnitude | 0.9760[1] | ||||||||||||
| Saros cycle | 126 (46 of 72[1]) | ||||||||||||
| Partiality | 208 minutes, 23 seconds[1] | ||||||||||||
| Penumbral | 361 minutes, 29 seconds[1] | ||||||||||||
| |||||||||||||
This was the longest partial lunar eclipse since February 18, 1440, and the longest until February 8, 2669; however, many eclipses, including the November 2022 lunar eclipse, have a longer period of umbral contact at next to 3 hours 40 minutes.[4][5] It was often referred to as a "Beaver Blood Moon" although not technically fulfilling the criteria for a true blood moon (totality).
This lunar eclipse was the second of an almost tetrad, with the others being on May 26, 2021 (total); May 16, 2022 (total); and November 8, 2022 (total).
Visibility
editThe eclipse was completely visible over northeast Asia, the Pacific Ocean, and North America, seen rising over east Asia and Australia and setting over South America.[6]
 
|
 Visibility map |
Gallery
edit-
Madrid, Spain, 7:29 UTC -
Nara City, Japan, 8:51 UTC -
Toronto, Ontario, 8:53 UTC -
Warrenton, Virginia, 9:01 UTC -
New Plymouth, New Zealand, 9:03 UTC -
Santa Fe, New Mexico, 9:03 UTC -
Jayapura, Indonesia, 9:04 UTC -
Mexico City, Mexico, 9:08 UTC -
Killingly, Connecticut, 9:12 UTC -
Dayton, Ohio, 9:25 UTC -
Hefei, China, 10:35 UTC -
Eclipse progression as seen from Texas -
Weifang, China, taken began at 10:31 UTC
Eclipse details
editShown below is a table displaying details about this particular solar eclipse. It describes various parameters pertaining to this eclipse.[7]
| Parameter | Value |
|---|---|
| Penumbral Magnitude | 2.07381 |
| Umbral Magnitude | 0.97595 |
| Gamma | −0.45525 |
| Sun Right Ascension | 15h39m50.9s |
| Sun Declination | -19°32'33.1" |
| Sun Semi-Diameter | 16'11.0" |
| Sun Equatorial Horizontal Parallax | 08.9" |
| Moon Right Ascension | 03h40m24.8s |
| Moon Declination | +19°09'15.5" |
| Moon Semi-Diameter | 14'44.5" |
| Moon Equatorial Horizontal Parallax | 0°54'06.1" |
| ΔT | 70.2 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.
| November 19 Ascending node (full moon) |
December 4 Descending node (new moon) |
|---|---|
| |
|
| Partial lunar eclipse Lunar Saros 126 |
Total solar eclipse Solar Saros 152 |
Related eclipses
editEclipses in 2021
edit- A total lunar eclipse on May 26.
- An annular solar eclipse on June 10.
- A partial lunar eclipse on November 19.
- A total solar eclipse on December 4.
Metonic
edit- Preceded by: Lunar eclipse of January 31, 2018
- Followed by: Lunar eclipse of September 7, 2025
Tzolkinex
edit- Preceded by: Lunar eclipse of October 8, 2014
- Followed by: Lunar eclipse of December 31, 2028
Half-Saros
edit- Preceded by: Solar eclipse of November 13, 2012
- Followed by: Solar eclipse of November 25, 2030
Tritos
edit- Preceded by: Lunar eclipse of December 21, 2010
- Followed by: Lunar eclipse of October 18, 2032
Lunar Saros 126
edit- Preceded by: Lunar eclipse of November 9, 2003
- Followed by: Lunar eclipse of November 30, 2039
Inex
edit- Preceded by: Lunar eclipse of December 9, 1992
- Followed by: Lunar eclipse of October 30, 2050
Triad
edit- Preceded by: Lunar eclipse of January 19, 1935
- Followed by: Lunar eclipse of September 20, 2108
Lunar eclipses of 2020–2023
edit| Lunar eclipse series sets from 2020–2023 | ||||||||
|---|---|---|---|---|---|---|---|---|
| Descending node | Ascending node | |||||||
| Saros | Date | Type Viewing |
Gamma | Saros | Date Viewing |
Type Chart |
Gamma | |
111
|
2020 Jun 05
|
Penumbral
|
1.24063 | 116
|
2020 Nov 30
|
Penumbral
|
−1.13094 | |
121
|
2021 May 26
|
Total
|
0.47741 | 126
|
2021 Nov 19
|
Partial
|
−0.45525 | |
131
|
2022 May 16
|
Total
|
−0.25324 | 136
|
2022 Nov 08
|
Total
|
0.25703 | |
141
|
2023 May 05
|
Penumbral
|
−1.03495 | 146
|
2023 Oct 28
|
Partial
|
0.94716 | |
| Last set | 2020 Jul 05 | Last set | 2020 Jan 10 | |||||
| Next set | 2024 Mar 25 | Next set | 2024 Sep 18 | |||||
Tritos series
editThe tritos series repeats 31 days short of 11 years at alternating nodes. Sequential events have incremental Saros cycle indices.
This series produces 20 total eclipses between April 24, 1967 and August 11, 2185, only being partial on November 19, 2021.
| Tritos eclipse series (subset 1901–2087) | ||||||
|---|---|---|---|---|---|---|
| Descending node | Ascending node | |||||
| Saros | Date Viewing |
Type chart |
Saros | Date Viewing |
Type chart | |
| 115 | 1901 Oct 27
|
Partial
|
116 | 1912 Sep 26
|
Partial
| |
| 117 | 1923 Aug 26
|
Partial
|
118 | 1934 Jul 26
|
Partial
| |
| 119 | 1945 Jun 25
|
Partial
|
120 | 1956 May 24
|
Partial
| |
| 121 | 1967 Apr 24
|
Total
|
122 | 1978 Mar 24
|
Total
| |
| 123 | 1989 Feb 20
|
Total
|
124 | 2000 Jan 21
|
Total
| |
| 125 | 2010 Dec 21
|
Total
|
126 | 2021 Nov 19
|
Partial
| |
| 127 | 2032 Oct 18
|
Total
|
128 | 2043 Sep 19
|
Total
| |
| 129 | 2054 Aug 18
|
Total
|
130 | 2065 Jul 17
|
Total
| |
| 131 | 2076 Jun 17
|
Total
|
132 | 2087 May 17
|
Total
| |
| 133 | 2098 Apr 15
|
Total
| ||||
Saros 126
editIt is part of saros series 126.
Lunar saros series 126, repeating every 18 years and 11 days, has a total of 70 lunar eclipse events including 14 total lunar eclipses. Solar Saros 133 interleaves with this lunar saros with an event occurring every 9 years 5 days alternating between each saros series.
First penumbral lunar eclipse: 18 July 1228
First partial lunar eclipse: 24 March 1625
First total lunar eclipse: 19 June 1769
First central lunar eclipse: 11 July 1805
Greatest eclipse of the lunar saros 126: 13 August 1859, lasting 106 minutes.
Last central lunar eclipse: 26 September 1931
Last total lunar eclipse: 9 November 2003
Last partial lunar eclipse: 5 June 2346
Last penumbral lunar eclipse: 19 August 2472
1901-2100
Metonic series
edit- First eclipse: November 20, 2002.
- Second eclipse: November 19, 2021.
- Third eclipse: November 18, 2040.
- Fourth eclipse: November 19, 2059.
- Fifth eclipse: November 19, 2078.
Half-Saros cycle
editA lunar eclipse will be preceded and followed by solar eclipses by 9 years and 5.5 days (a half saros).[8] This lunar eclipse is related to two total solar eclipses of Solar Saros 133.
| November 13, 2012 | November 25, 2030 |
|---|---|
|
|
See also
editReferences
edit- ^ a b c d e f g h i j 2021 Nov 19 chart: Eclipse Predictions by Fred Espenak, NASA/GSFC
- ^ "November 18–19, 2021 Partial Lunar Eclipse". timeanddate. Retrieved 18 November 2024.
- ^ "Moon Distances for London, United Kingdom, England". timeanddate. Retrieved 18 November 2024.
- ^ "Longest partial eclipse in centuries bathes Moon in red". www.aljazeera.com. Aljazeera. Retrieved 19 November 2021.
- ^ "What makes certain lunar eclipses so special? (Beginner) - Curious About Astronomy? Ask an Astronomer". curious.astro.cornell.edu. Cornell Astronomy. Retrieved 14 November 2021.
- ^ "Partial Lunar Eclipse of 2021 Nov 19" (PDF). NASA. Retrieved 18 November 2024.
- ^ "Partial Lunar Eclipse of 2021 Nov 19". EclipseWise.com. Retrieved 18 November 2024.
- ^ Mathematical Astronomy Morsels, Jean Meeus, p.110, Chapter 18, The half-saros
External links
edit
- 2021 Nov 19 chart: Eclipse Predictions by Fred Espenak, NASA/GSFC
- Saros cycle 126