A partial lunar eclipse occurred at the Moon’s descending node of orbit on Monday, August 7, 2017,[1] with an umbral magnitude of 0.2477. 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 5.2 days after apogee (on August 2, 2017, at 13:55 UTC), the Moon's apparent diameter was smaller.[2]
| Partial eclipse | |||||||||||||
 Partiality as viewed from Kuwait City, Kuwait, 19:14 UTC | |||||||||||||
| Date | August 7, 2017 | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Gamma | 0.8668 | ||||||||||||
| Magnitude | 0.2477 | ||||||||||||
| Saros cycle | 119 (62 of 83) | ||||||||||||
| Partiality | 115 minutes, 15 seconds | ||||||||||||
| Penumbral | 300 minutes, 54 seconds | ||||||||||||
| |||||||||||||
Visibility
editThe eclipse was completely visible over east Africa, Asia, and Australia, seen rising over much of Africa and Europe and setting over the central Pacific Ocean.[3]
|
 Hourly motion shown right to left |
 Visibility map | |
Gallery
edit-
Reggio Calabria, Italy, 17:36 UTC -
Lysychansk, Ukraine, 17:54 UTC -
Florence, Italy, 17:55 UTC -
Lucerne, Switzerland, 18:16 UTC -
Pune, India
At maximum, 18:20 UTC -
Seoul, South Korea, 18:22 UTC -
Omsk, Russia, 18:28 UTC -
Constanța, Romania, 18:43 UTC -
Gdańsk, Poland, 18:50 UTC -
Farasan Island, Saudi Arabia, 18:53 UTC -
Karviná, Czech Republic, 18:56 UTC -
Helsinki, Finland, 18:57 UTC -
Sayada, Tunisia, 19:01 UTC -
Gaborone, Botswana, 19:02 UTC -
Albershausen, Germany, 19:14 UTC -
Rethymno, Greece, 19:21 UTC -
Progression from Oria, Italy
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 | 1.28985 |
| Umbral Magnitude | 0.24767 |
| Gamma | 0.86690 |
| Sun Right Ascension | 09h11m33.0s |
| Sun Declination | +16°12'28.1" |
| Sun Semi-Diameter | 15'46.4" |
| Sun Equatorial Horizontal Parallax | 08.7" |
| Moon Right Ascension | 21h10m53.1s |
| Moon Declination | -15°25'17.2" |
| Moon Semi-Diameter | 15'08.1" |
| Moon Equatorial Horizontal Parallax | 0°55'32.7" |
| ΔT | 68.5 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.
| August 7 Descending node (full moon) |
August 21 Ascending node (new moon) |
|---|---|
| |
|
| Partial lunar eclipse Lunar Saros 119 |
Total solar eclipse Solar Saros 145 |
Related eclipses
editEclipses in 2017
edit- A penumbral lunar eclipse on February 11.
- An annular solar eclipse on February 26.
- A partial lunar eclipse on August 7.
- A total solar eclipse on August 21.
Metonic
edit- Preceded by: Lunar eclipse of October 18, 2013
- Followed by: Lunar eclipse of May 26, 2021
Tzolkinex
edit- Preceded by: Lunar eclipse of June 26, 2010
- Followed by: Lunar eclipse of September 18, 2024
Half-Saros
edit- Preceded by: Solar eclipse of August 1, 2008
- Followed by: Solar eclipse of August 12, 2026
Tritos
edit- Preceded by: Lunar eclipse of September 7, 2006
- Followed by: Lunar eclipse of July 6, 2028
Lunar Saros 119
edit- Preceded by: Lunar eclipse of July 28, 1999
- Followed by: Lunar eclipse of August 19, 2035
Inex
edit- Preceded by: Lunar eclipse of August 27, 1988
- Followed by: Lunar eclipse of July 18, 2046
Triad
edit- Preceded by: Lunar eclipse of October 7, 1930
- Followed by: Lunar eclipse of June 8, 2104
Lunar eclipses of 2016–2020
edit| Lunar eclipse series sets from 2016–2020 | ||||||||
|---|---|---|---|---|---|---|---|---|
| Descending node | Ascending node | |||||||
| Saros | Date | Type Viewing |
Gamma | Saros | Date Viewing |
Type Chart |
Gamma | |
| 109 | 2016 Aug 18
|
Penumbral
|
1.56406 | 114
|
2017 Feb 11
|
Penumbral
|
−1.02548 | |
| 119
|
2017 Aug 07
|
Partial
|
0.86690 | 124
|
2018 Jan 31
|
Total
|
−0.30143 | |
129
|
2018 Jul 27
|
Total
|
0.11681 | 134
|
2019 Jan 21
|
Total
|
0.36842 | |
139
|
2019 Jul 16
|
Partial
|
−0.64300 | 144
|
2020 Jan 10
|
Penumbral
|
1.07270 | |
| 149 | 2020 Jul 05
|
Penumbral
|
−1.36387 | |||||
| Last set | 2016 Sep 16 | Last set | 2016 Mar 23 | |||||
| Next set | 2020 Jun 05 | Next set | 2020 Nov 30 | |||||
Saros 119
editIt is part of Saros series 119 (member 61 of 82).
Half-Saros cycle
editA lunar eclipse will be preceded and followed by solar eclipses by 9 years and 5.5 days (a half saros).[5] This lunar eclipse is related to two total solar eclipses of Solar Saros 126.
| August 1, 2008 | August 12, 2026 |
|---|---|
|
|
See also
editReferences
edit- ^ "August 7–8, 2017 Partial Lunar Eclipse". timeanddate. Retrieved 17 November 2024.
- ^ "Moon Distances for London, United Kingdom, England". timeanddate. Retrieved 17 November 2024.
- ^ "Partial Lunar Eclipse of 2017 Aug 07" (PDF). NASA. Retrieved 17 November 2024.
- ^ "Partial Lunar Eclipse of 2017 Aug 07". EclipseWise.com. Retrieved 17 November 2024.
- ^ Mathematical Astronomy Morsels, Jean Meeus, p.110, Chapter 18, The half-saros
External links
edit
- 2017 Aug 07 chart: Eclipse Predictions by Fred Espenak, NASA/GSFC
- Hermit Eclipse: Partial Lunar Eclipse of 7 Aug, 2017 AD
- Partial Lunar Eclipse 7 Aug, 2017 - Live Webcast
- August's Lunar Eclipse APOD: Aug 9, 2017