July 2019 lunar eclipse

A partial lunar eclipse occurred at the Moon’s descending node of orbit on Tuesday, July 16, 2019,^[1] with an umbral magnitude of 0.6544. 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 3.9 days after apogee (on July 20, 2019, at 20:00 UTC), the Moon's apparent diameter was smaller.^[2]

July 2019 lunar eclipse

Partial eclipse
Near greatest eclipse from Tilehurst, England, 21:30 UTC
Date	July 16, 2019
Gamma	−0.643
Magnitude	0.6544
Saros cycle	139 (22 of 81)
Partiality	177 minutes, 56 seconds
Penumbral	333 minutes, 43 seconds
Contacts (UTC) P1 18:43:53 U1 20:01:43 Greatest 21:30:44 U4 22:59:39 P4 0:17:36
← January 2019 January 2020 →

Visibility

The eclipse was completely visible over Africa, eastern Europe, Antarctica, and west, central, and south Asia, seen rising over the South America, western Europe, and west Africa, and setting over east Asia and Australia.^[3]

Visibility map

Gallery

• 
  Hefei, China, 19:56 UTC
• 
  Mariupol, Ukraine, 20:25 UTC
• 
  Tashkent, Uzbekistan, 21:05 UTC
• 
  Moscow, Russia, 21:11 UTC
• 
  Novate Milanese, Italy, 21:17 UTC
• 
  Bandung, Indonesia, 21:20 UTC
• 
  Farasan Island, Saudi Arabia, 21:25 UTC
• 
  Paris, France, 21:27 UTC
• 
  Kuala Lumpur, Malaysia, 21:30 UTC
• 
  Munich, Germany, 21:36 UTC
• 
  Prague, Czech Republic, 21:39 UTC
• 
  Manuel B. Gonnet, Argentina, 21:43 UTC
• 
  London, England, 21:47 UTC
• 
  Sayada, Tunisia, 21:55 UTC
• 
  Virovitica, Croatia, 22:12 UTC
• 
  Banjarmasin, Indonesia, Near Moonset, 22:17 UTC
• 
  Krško, Slovenia, 22:19 UTC
• 
  Szanda, Hungary, 22:23 UTC
• 
  Wrocław, Poland, 22:27 UTC
• 
  Logroño, Spain, 22:32 UTC

Eclipse details

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

July 16, 2019 Lunar Eclipse Parameters

Parameter	Value
Penumbral Magnitude	1.70500
Umbral Magnitude	0.65442
Gamma	−0.64300
Sun Right Ascension	07h43m48.8s
Sun Declination	+21°17'38.5"
Sun Semi-Diameter	15'44.2"
Sun Equatorial Horizontal Parallax	08.7"
Moon Right Ascension	19h44m00.3s
Moon Declination	-21°52'53.0"
Moon Semi-Diameter	14'58.7"
Moon Equatorial Horizontal Parallax	0°54'58.2"
ΔT	69.3 s

Eclipse season

See also: Eclipse cycle

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 July 2019

July 2 Ascending node (new moon)	July 16 Descending node (full moon)
Total solar eclipse Solar Saros 127	Partial lunar eclipse Lunar Saros 139

Related eclipses

Eclipses in 2019

• A partial solar eclipse on January 6.
• A total lunar eclipse on January 21.
• A total solar eclipse on July 2.
• A partial lunar eclipse on July 16.
• An annular solar eclipse on December 26.

Metonic

• Preceded by: Lunar eclipse of September 28, 2015
• Followed by: Lunar eclipse of May 5, 2023

Tzolkinex

• Preceded by: Lunar eclipse of June 4, 2012
• Followed by: Lunar eclipse of August 28, 2026

Half-Saros

• Preceded by: Solar eclipse of July 11, 2010
• Followed by: Solar eclipse of July 22, 2028

Tritos

• Preceded by: Lunar eclipse of August 16, 2008
• Followed by: Lunar eclipse of June 15, 2030

Lunar Saros 139

• Preceded by: Lunar eclipse of July 5, 2001
• Followed by: Lunar eclipse of July 27, 2037

Inex

• Preceded by: Lunar eclipse of August 6, 1990
• Followed by: Lunar eclipse of June 26, 2048

Triad

• Preceded by: Lunar eclipse of September 14, 1932
• Followed by: Lunar eclipse of May 17, 2106

Lunar eclipses of 2016–2020

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.^[5]

The penumbral lunar eclipses on March 23, 2016 and September 16, 2016 occur in the previous lunar year eclipse set, and the penumbral lunar eclipses on June 5, 2020 and November 30, 2020 occur in the next lunar year eclipse set.

Lunar eclipse series sets from 2016 to 2020
Descending node					Ascending node
Saros	Date Viewing	Type Chart	Gamma		Saros	Date Viewing	Type Chart	Gamma
109	2016 Aug 18	Penumbral	1.5641		114	2017 Feb 11	Penumbral	−1.0255
119	2017 Aug 07	Partial	0.8669		124	2018 Jan 31	Total	−0.3014
129	2018 Jul 27	Total	0.1168		134	2019 Jan 21	Total	0.3684
139	2019 Jul 16	Partial	−0.6430		144	2020 Jan 10	Penumbral	1.0727
149	2020 Jul 05	Penumbral	−1.3639

Saros 139

This eclipse is a part of Saros series 139, repeating every 18 years, 11 days, and containing 79 events. The series started with a penumbral lunar eclipse on December 9, 1658. It contains partial eclipses from June 3, 1947 through August 7, 2055; total eclipses from August 17, 2073 through May 30, 2542; and a second set of partial eclipses from June 9, 2560 through August 25, 2686. The series ends at member 75 as a penumbral eclipse on April 13, 3065.

The longest duration of totality will be produced by member 31 at 102 minutes, 39 seconds on November 2, 2199. All eclipses in this series occur at the Moon’s descending node of orbit.^[6]

Greatest	First
The greatest eclipse of the series will occur on 2199 Nov 02, lasting 102 minutes, 39 seconds.[7]	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

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 9–31 occur between 1801 and 2200:
9		10		11
1803 Mar 08		1821 Mar 18		1839 Mar 30
12		13		14
1857 Apr 09		1875 Apr 20		1893 Apr 30
15		16		17
1911 May 13		1929 May 23		1947 Jun 03
18		19		20
1965 Jun 14		1983 Jun 25		2001 Jul 05
21		22		23
2019 Jul 16		2037 Jul 27		2055 Aug 07
24		25		26
2073 Aug 17		2091 Aug 29		2109 Sep 09
27		28		29
2127 Sep 20		2145 Sep 30		2163 Oct 12
30		31
2181 Oct 22		2199 Nov 02

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
1801 Mar 30 (Saros 119)		1812 Feb 27 (Saros 120)		1823 Jan 26 (Saros 121)		1833 Dec 26 (Saros 122)		1844 Nov 24 (Saros 123)
1855 Oct 25 (Saros 124)		1866 Sep 24 (Saros 125)		1877 Aug 23 (Saros 126)		1888 Jul 23 (Saros 127)		1899 Jun 23 (Saros 128)
1910 May 24 (Saros 129)		1921 Apr 22 (Saros 130)		1932 Mar 22 (Saros 131)		1943 Feb 20 (Saros 132)		1954 Jan 19 (Saros 133)
1964 Dec 19 (Saros 134)		1975 Nov 18 (Saros 135)		1986 Oct 17 (Saros 136)		1997 Sep 16 (Saros 137)		2008 Aug 16 (Saros 138)
2019 Jul 16 (Saros 139)		2030 Jun 15 (Saros 140)		2041 May 16 (Saros 141)		2052 Apr 14 (Saros 142)		2063 Mar 14 (Saros 143)
2074 Feb 11 (Saros 144)		2085 Jan 10 (Saros 145)		2095 Dec 11 (Saros 146)		2106 Nov 11 (Saros 147)		2117 Oct 10 (Saros 148)
2128 Sep 09 (Saros 149)		2139 Aug 10 (Saros 150)		2150 Jul 09 (Saros 151)		2161 Jun 08 (Saros 152)		2172 May 08 (Saros 153)
		2194 Mar 07 (Saros 155)

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
1816 Dec 04 (Saros 132)		1845 Nov 14 (Saros 133)		1874 Oct 25 (Saros 134)
1903 Oct 06 (Saros 135)		1932 Sep 14 (Saros 136)		1961 Aug 26 (Saros 137)
1990 Aug 06 (Saros 138)		2019 Jul 16 (Saros 139)		2048 Jun 26 (Saros 140)
2077 Jun 06 (Saros 141)		2106 May 17 (Saros 142)		2135 Apr 28 (Saros 143)
2164 Apr 07 (Saros 144)		2193 Mar 17 (Saros 145)

Half-Saros cycle

A 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 146.

July 11, 2010	July 22, 2028

See also

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