A partial lunar eclipse will occur at the Moon’s descending node of orbit on Monday, July 27, 2037,[1] with an umbral magnitude of 0.8108. 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 4.1 days before apogee (on July 31, 2037, at 8:30 UTC), the Moon's apparent diameter will be smaller.[2]
| Partial eclipse | |||||||||||||
 The Moon's hourly motion shown right to left | |||||||||||||
| Date | July 27, 2037 | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Gamma | −0.5582 | ||||||||||||
| Magnitude | 0.8108 | ||||||||||||
| Saros cycle | 139 (23 of 81) | ||||||||||||
| Partiality | 192 minutes, 25 seconds | ||||||||||||
| Penumbral | 340 minutes, 49 seconds | ||||||||||||
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This lunar eclipse will be the last of an almost tetrad, with the others being on February 11, 2036 (total); August 7, 2036 (total); and January 31, 2037 (total).
Visibility
editThe eclipse will be completely visible over eastern North America and South America, seen rising over western North America and the eastern Pacific Ocean and setting over Africa and Europe.[3]
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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 | 1.85965 |
| Umbral Magnitude | 0.81075 |
| Gamma | −0.55822 |
| Sun Right Ascension | 08h27m18.9s |
| Sun Declination | +19°07'58.8" |
| Sun Semi-Diameter | 15'45.0" |
| Sun Equatorial Horizontal Parallax | 08.7" |
| Moon Right Ascension | 20h27m37.3s |
| Moon Declination | -19°38'25.9" |
| Moon Semi-Diameter | 15'00.9" |
| Moon Equatorial Horizontal Parallax | 0°55'06.5" |
| ΔT | 77.8 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.
| July 13 Ascending node (new moon) |
July 27 Descending node (full moon) |
|---|---|
 |
|
| Total solar eclipse Solar Saros 127 |
Partial lunar eclipse Lunar Saros 139 |
Related eclipses
editEclipses in 2037
edit- A partial solar eclipse on January 16.
- A total lunar eclipse on January 31.
- A total solar eclipse on July 13.
- A partial lunar eclipse on July 27.
Metonic
edit- Preceded by: Lunar eclipse of October 8, 2033
- Followed by: Lunar eclipse of May 16, 2041
Tzolkinex
edit- Preceded by: Lunar eclipse of June 15, 2030
- Followed by: Lunar eclipse of September 7, 2044
Half-Saros
edit- Preceded by: Solar eclipse of July 22, 2028
- Followed by: Solar eclipse of August 2, 2046
Tritos
edit- Preceded by: Lunar eclipse of August 28, 2026
- Followed by: Lunar eclipse of June 26, 2048
Lunar Saros 139
edit- Preceded by: Lunar eclipse of July 16, 2019
- Followed by: Lunar eclipse of August 7, 2055
Inex
edit- Preceded by: Lunar eclipse of August 16, 2008
- Followed by: Lunar eclipse of July 7, 2066
Triad
edit- Preceded by: Lunar eclipse of September 26, 1950
- Followed by: Lunar eclipse of May 28, 2124
Lunar eclipses of 2035–2038
edit| Ascending node | Descending node | |||||
|---|---|---|---|---|---|---|
| Saros | Date Viewing |
Type Chart |
Saros | Date Viewing |
Type Chart | |
| 114 | 2035 Feb 22
|
Penumbral
|
119 | 2035 Aug 19
|
Partial
| |
| 124 | 2036 Feb 11
|
Total
|
129 | 2036 Aug 07
|
Total
| |
| 134 | 2037 Jan 31
|
Total
|
139 | 2037 Jul 27
|
Partial
| |
| 144 | 2038 Jan 21
|
Penumbral
|
149 | 2038 Jul 16
|
Penumbral
| |
| Last set | 2034 Apr 03 | Last set | 2034 Sep 28 | |||
| Next set | 2038 Jun 17 | Next set | 2038 Dec 11 | |||
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 | |||
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| 1965 Jun 14 | 1983 Jun 25 | 2001 Jul 05 | |||
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| 2019 Jul 16 | 2037 Jul 27 | 2055 Aug 07 | |||
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| 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.
| July 22, 2028 | August 2, 2046 |
|---|---|
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See also
editNotes
edit- ^ "July 26–27, 2037 Partial Lunar Eclipse". timeanddate. Retrieved 29 November 2024.
- ^ "Moon Distances for London, United Kingdom, England". timeanddate. Retrieved 29 November 2024.
- ^ "Partial Lunar Eclipse of 2037 Jul 27" (PDF). NASA. Retrieved 29 November 2024.
- ^ "Partial Lunar Eclipse of 2037 Jul 27". EclipseWise.com. Retrieved 29 November 2024.
- ^ Listing of Eclipses of cycle 139
- ^ Mathematical Astronomy Morsels, Jean Meeus, p.110, Chapter 18, The half-saros
External links
edit- 2037 Jul 27 chart: Eclipse Predictions by Fred Espenak, NASA/GSFC
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