August 2017 lunar eclipse

August 2017 lunar eclipse

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
Contacts (UTC) P1 15:50:02 U1 17:22:55 Greatest 18:20:28 U4 19:18:10 P4 20:50:56
← February 2017 January 2018 →

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]

The 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

• 
  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

Shown below is a table displaying details about this particular solar eclipse. It describes various parameters pertaining to this eclipse.^[4]

August 7, 2017 Lunar Eclipse Parameters

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

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 August 2017

August 7 Descending node (full moon)	August 21 Ascending node (new moon)
Partial lunar eclipse Lunar Saros 119	Total solar eclipse Solar Saros 145

• 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.

• Preceded by: Lunar eclipse of October 18, 2013
• Followed by: Lunar eclipse of May 26, 2021

• Preceded by: Lunar eclipse of June 26, 2010
• Followed by: Lunar eclipse of September 18, 2024

• Preceded by: Solar eclipse of August 1, 2008
• Followed by: Solar eclipse of August 12, 2026

• Preceded by: Lunar eclipse of September 7, 2006
• Followed by: Lunar eclipse of July 6, 2028

• Preceded by: Lunar eclipse of July 28, 1999
• Followed by: Lunar eclipse of August 19, 2035

• Preceded by: Lunar eclipse of August 27, 1988
• Followed by: Lunar eclipse of July 18, 2046

• Preceded by: Lunar eclipse of October 7, 1930
• Followed by: Lunar eclipse of June 8, 2104

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

It is part of Saros series 119 (member 61 of 82).

A 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

• List of 21st-century lunar eclipses
• Lists of lunar eclipses

• 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