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July 2027 lunar eclipse

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July 2027 lunar eclipse
Penumbral eclipse
The Moon's hourly motion shown right to left
DateJuly 18, 2027
Gamma−1.5759
Magnitude−1.0662
Saros cycle110 (72 of 72)
Penumbral11 minutes, 47 seconds
Contacts (UTC)
P115:56:57
Greatest16:02:53
P416:08:45

A penumbral lunar eclipse will occur at the Moon’s ascending node of orbit on Sunday, July 18, 2027,[1] with an umbral magnitude of −1.0662. A lunar eclipse occurs when the Moon moves into the Earth's shadow, causing the Moon to be darkened. A penumbral lunar eclipse occurs when part or all of the Moon's near side passes into 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 only about 16 hours before apogee (on July 19, 2027, at 7:50 UTC), the Moon's apparent diameter will be smaller.[2]

The Moon will barely clip the edge of the Earth's penumbral shadow, and the eclipse will be impossible to see in practice. The event is listed as a miss by some sources.[3]

Visibility

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The eclipse will be completely visible over Asia, east Africa, and Australia.[4]

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.[5]

July 18, 2027 Lunar Eclipse Parameters
Parameter Value
Penumbral Magnitude 0.00320
Umbral Magnitude −1.06620
Gamma −1.57589
Sun Right Ascension 07h51m14.4s
Sun Declination +20°58'43.6"
Sun Semi-Diameter 15'44.3"
Sun Equatorial Horizontal Parallax 08.7"
Moon Right Ascension 19h52m57.2s
Moon Declination -22°20'25.3"
Moon Semi-Diameter 14'43.0"
Moon Equatorial Horizontal Parallax 0°54'00.6"
ΔT 72.7 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. The first and last eclipse in this sequence is separated by one synodic month.

Eclipse season of July–August 2027
July 18
Ascending node (full moon)
 August 2
Descending node (new moon)
 August 17
Ascending node (full moon)
Penumbral lunar eclipse
Lunar Saros 110		 Total solar eclipse
Solar Saros 136		 Penumbral lunar eclipse
Lunar Saros 148
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Eclipses in 2027

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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 110

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Inex

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Triad

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Lunar eclipses of 2027–2031

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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.[6]

The penumbral lunar eclipses on February 20, 2027 and August 17, 2027 occur in the previous lunar year eclipse set, and the penumbral lunar eclipses on May 7, 2031 and October 30, 2031 occur in the next lunar year eclipse set.

Lunar eclipse series sets from 2027 to 2031
Ascending node   Descending node
Saros Date
Viewing 		Type
Chart 		Gamma Saros Date
Viewing 		Type
Chart 		Gamma
110 2027 Jul 18
 Penumbral
 −1.5759 115 2028 Jan 12
 Partial
 0.9818
120 2028 Jul 06
 Partial
 −0.7904 125 2028 Dec 31
 Total
 0.3258
130 2029 Jun 26
 Total
 0.0124 135 2029 Dec 20
 Total
 −0.3811
140 2030 Jun 15
 Partial
 0.7535 145 2030 Dec 09
 Penumbral
 −1.0732
150 2031 Jun 05
 Penumbral
 1.4732

Saros 110

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This eclipse is a part of Saros series 110, repeating every 18 years, 11 days, and containing 72 events. The series started with a penumbral lunar eclipse on May 28, 747 AD. It contains partial eclipses from August 23, 891 AD through April 18, 1288; total eclipses from April 29, 1306 through September 5, 1522; and a second set of partial eclipses from September 16, 1540 through April 22, 1883. The series ends at member 72 as a penumbral eclipse on July 18, 2027.

The longest duration of totality was produced by member 38 at 103 minutes, 8 seconds on July 3, 1414. All eclipses in this series occur at the Moon’s ascending node of orbit.[7]

Greatest First
The greatest eclipse of the series occurred on 1414 Jul 03, lasting 103 minutes, 8 seconds.[8] Penumbral Partial Total Central
747 May 28
 891 Aug 23
 1306 Apr 29
 1360 May 31
Last
Central Total Partial Penumbral
1468 Aug 04
 1522 Sep 05
 1883 Apr 22
 2027 Jul 18

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.

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).[9] This lunar eclipse is related to two partial solar eclipses of Solar Saros 117.

July 13, 2018 July 23, 2036

See also

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Notes

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  1. ^ "July 18–19, 2027 Almost Lunar Eclipse". timeanddate. Retrieved 19 November 2024.
  2. ^ "Moon Distances for London, United Kingdom, England". timeanddate. Retrieved 19 November 2024.
  3. ^ "Almost Lunar Eclipse on July 18-19, 2027 – Where and when to See".
  4. ^ "Penumbral Lunar Eclipse of 2027 Jul 18" (PDF). NASA. Retrieved 19 November 2024.
  5. ^ "Penumbral Lunar Eclipse of 2027 Jul 18". EclipseWise.com. Retrieved 19 November 2024.
  6. ^ van Gent, R.H. "Solar- and Lunar-Eclipse Predictions from Antiquity to the Present". A Catalogue of Eclipse Cycles. Utrecht University. Retrieved 6 October 2018.
  7. ^ "NASA - Catalog of Lunar Eclipses of Saros 110". eclipse.gsfc.nasa.gov.
  8. ^ Listing of Eclipses of series 110
  9. ^ Mathematical Astronomy Morsels, Jean Meeus, p.110, Chapter 18, The half-saros
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