en July 2037 lunar eclipse

July 2037 lunar eclipse
Partial eclipse
	The Moon's hourly motion shown right to left
Date	July 27, 2037
Gamma	−0.5582
Magnitude	0.8108
Saros cycle	139 (23 of 81)
Partiality	192 minutes, 25 seconds
Penumbral	340 minutes, 49 seconds
P1
Contacts (UTC)
P1	1:19:29
U1	2:33:41
Greatest	4:09:53
U4	5:46:05
P4	7:00:17
	← January 2037 January 2038 →

A partial lunar eclipse will occur at the Moon’s descending node of orbit on Monday, July 27, 2037,^[1] with an umbral magnitude of 0.8108. 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 4.1 days before apogee (on July 31, 2037, at 8:30 UTC), the Moon's apparent diameter will be smaller.^[2]

Visibility

The eclipse will be completely visible over eastern North America and South America, seen rising over western North America and the eastern Pacific Ocean and setting over Africa and Europe.^[3]

Eclipse details

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

July 27, 2037 Lunar Eclipse Parameters
Parameter	Value
Penumbral Magnitude	1.85965
Umbral Magnitude	0.81075
Gamma	−0.55822
Sun Right Ascension	08h27m18.9s
Sun Declination	+19°07'58.8"
Sun Semi-Diameter	15'45.0"
Sun Equatorial Horizontal Parallax	08.7"
Moon Right Ascension	20h27m37.3s
Moon Declination	-19°38'25.9"
Moon Semi-Diameter	15'00.9"
Moon Equatorial Horizontal Parallax	0°55'06.5"
ΔT	77.8 s

Eclipse season

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 2037
July 13 Ascending node (new moon)	July 27 Descending node (full moon)

Total solar eclipse Solar Saros 127	Partial lunar eclipse Lunar Saros 139

Related eclipses

Eclipses in 2037

Lunar eclipses of 2035–2038

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 June 17, 2038 and December 11, 2038 occur in the next lunar year eclipse set.

Lunar eclipse series sets from 2035 to 2038
Ascending node				Descending node
Saros	Date Viewing	Type Chart	Gamma	Saros	Date Viewing	Type Chart	Gamma
114	2035 Feb 22	Penumbral	−1.0357	119	2035 Aug 19	Partial	0.9433
124	2036 Feb 11	Total	−0.3110	129	2036 Aug 07	Total	0.2004
134	2037 Jan 31	Total	0.3619	139	2037 Jul 27	Partial	−0.5582
144	2038 Jan 21	Penumbral	1.0710	149	2038 Jul 16	Penumbral	−1.2837

Saros 139

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.^[6]	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

A lunar eclipse will be preceded and followed by solar eclipses by 9 years and 5.5 days (a half saros).^[7] This lunar eclipse is related to two total solar eclipses of Solar Saros 146.