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July 2019 lunar eclipse

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July 2019 lunar eclipse
Partial eclipse
Near greatest eclipse from Tilehurst, England, 21:30 UTC
DateJuly 17, 2019
Gamma−0.643
Magnitude0.6544
Saros cycle139 (22 of 81)
Partiality177 minutes, 56 seconds
Penumbral333 minutes, 43 seconds
Contacts (UTC)
P118:43:53
U120:01:43
Greatest21:30:44
U422:59:39
P40:17:36

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]

Visibility

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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
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Eclipse details

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Shown below is a table displaying details about this particular solar 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

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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
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Eclipses in 2019

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Metonic

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Tzolkinex

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Half-Saros

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Tritos

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Lunar Saros 139

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Inex

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Triad

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Lunar eclipses of 2016–2020

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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 139

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Lunar 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
1901–2100
1911 May 13 1929 May 23 1947 Jun 03
1965 Jun 14 1983 Jun 25 2001 Jul 05
2019 Jul 16 2037 Jul 27 2055 Aug 07
2073 Aug 17 2091 Aug 29

Half-Saros cycle

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A 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 11, 2010 July 22, 2028

See also

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References

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  1. ^ "July 16–17, 2019 Partial Lunar Eclipse". timeanddate. Retrieved 17 November 2024.
  2. ^ "Moon Distances for London, United Kingdom, England". timeanddate. Retrieved 17 November 2024.
  3. ^ "Partial Lunar Eclipse of 2019 Jul 16" (PDF). NASA. Retrieved 17 November 2024.
  4. ^ "Partial Lunar Eclipse of 2019 Jul 16". EclipseWise.com. Retrieved 17 November 2024.
  5. ^ Listing of Eclipses of cycle 139
  6. ^ Mathematical Astronomy Morsels, Jean Meeus, p.110, Chapter 18, The half-saros
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