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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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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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Lunar eclipse series sets from 2027–2031
Ascending node   Descending node
Saros Date
Viewing
Type
Chart
Gamma Saros Date
Viewing
Type
Chart
Gamma
110 2027 Jul 18
Penumbral
-1.57589 115 2028 Jan 12
Partial
0.98177
120 2028 Jul 06
Partial
-0.79040 125 2028 Dec 31
Total
0.32583
130 2029 Jun 26
Total
0.01240 135 2029 Dec 20
Total
-0.38110
140 2030 Jun 15
Partial
0.75346 145 2030 Dec 09
Penumbral
-1.07315
150 2031 Jun 05
Penumbral
1.47322
Last set 2027 Aug 17 Last set 2027 Feb 20
Next set 2031 May 07 Next set 2031 Oct 30

Saros 110

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This eclipse is a member of Saros series 110. The previous event occurred on July 7, 2009. This is the last lunar eclipse of this series.

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 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. ^ Mathematical Astronomy Morsels, Jean Meeus, p.110, Chapter 18, The half-saros
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