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May 2087 lunar eclipse
Total eclipse
	The Moon's hourly motion shown right to left
Date	May 17, 2087
Gamma	0.1999
Magnitude	1.4568
Saros cycle	132 (34 of 71)
Totality	95 minutes, 6 seconds
Partiality	230 minutes, 39 seconds
Penumbral	370 minutes, 57 seconds
P1
Contacts (UTC)
P1	12:46:57
U1	13:57:08
U2	15:04:54
Greatest	15:52:27
U3	16:40:00
U4	17:47:47
P4	18:57:54
	← November 2086 November 2087 →

A total lunar eclipse will occur at the Moon’s ascending node of orbit on Saturday, May 17, 2087,^[1] with an umbral magnitude of 1.4568. It will be a central lunar eclipse, in which part of the Moon will pass through the center of the Earth's shadow. A lunar eclipse occurs when the Moon moves into the Earth's shadow, causing the Moon to be darkened. A total lunar eclipse occurs when the Moon's near side entirely passes into the Earth's umbral shadow. 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. A total lunar eclipse can last up to nearly two hours, while a total solar eclipse lasts only a few minutes at any given place, because the Moon's shadow is smaller. Occurring about 2 days after apogee (on May 15, 2087, at 15:25 UTC), the Moon's apparent diameter will be smaller.^[2]

Visibility

The eclipse will be completely visible over east and southeast Asia, Australia, and Antarctica, seen rising over much of Africa, central and eastern Europe, and west, central, and south Asia and setting over the central and eastern Pacific Ocean.^[3]

Eclipse details

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

May 17, 2087 Lunar Eclipse Parameters
Parameter	Value
Penumbral Magnitude	2.52894
Umbral Magnitude	1.45675
Gamma	0.19987
Sun Right Ascension	03h38m52.3s
Sun Declination	+19°28'43.2"
Sun Semi-Diameter	15'49.1"
Sun Equatorial Horizontal Parallax	08.7"
Moon Right Ascension	15h38m58.3s
Moon Declination	-19°17'59.5"
Moon Semi-Diameter	14'45.2"
Moon Equatorial Horizontal Parallax	0°54'08.7"
ΔT	114.5 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. The first and last eclipse in this sequence is separated by one synodic month.

Eclipse season of May–June 2087
May 2 Descending node (new moon)	May 17 Ascending node (full moon)	June 1 Descending node (new moon)

Partial solar eclipse Solar Saros 120	Total lunar eclipse Lunar Saros 132	Partial solar eclipse Solar Saros 158

Related eclipses

Eclipses in 2087

Lunar eclipses of 2085–2088

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 January 10, 2085 and July 7, 2085 occur in the previous lunar year eclipse set.

Lunar eclipse series sets from 2085 to 2088
Ascending node				Descending node
Saros	Date Viewing	Type Chart	Gamma	Saros	Date Viewing	Type Chart	Gamma
112	2085 Jun 08	Penumbral	−1.2745	117	2085 Dec 01	Penumbral	1.2189
122	2086 May 28	Partial	−0.5585	127	2086 Nov 20	Partial	0.4799
132	2087 May 17	Total	0.1999	137	2087 Nov 10	Total	−0.2043
142	2088 May 05	Partial	0.9387	147	2088 Oct 30	Partial	−0.9147

Saros 132

This eclipse is a part of Saros series 132, repeating every 18 years, 11 days, and containing 71 events. The series started with a penumbral lunar eclipse on May 12, 1492. It contains partial eclipses from August 16, 1636 through March 24, 1997; total eclipses from April 4, 2015 through August 2, 2213; and a second set of partial eclipses from August 13, 2231 through November 30, 2411. The series ends at member 71 as a penumbral eclipse on June 26, 2754.

The longest duration of totality will be produced by member 36 at 106 minutes, 6 seconds on June 9, 2123. All eclipses in this series occur at the Moon’s ascending node of orbit.^[6]

Greatest	First
The greatest eclipse of the series will occur on 2123 Jun 09, lasting 106 minutes, 6 seconds.^[7]	Penumbral	Partial	Total	Central
	1492 May 12	1636 Aug 16	2015 Apr 04	2069 May 06
	Last
	Central	Total	Partial	Penumbral
	2177 Jul 11	2213 Aug 02	2411 Nov 30	2754 Jun 26

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 19–40 occur between 1801 and 2200:
19	20	21
1816 Dec 04	1834 Dec 16	1852 Dec 26

22	23	24
1871 Jan 06	1889 Jan 17	1907 Jan 29

25	26	27
1925 Feb 08	1943 Feb 20	1961 Mar 02

28	29	30
1979 Mar 13	1997 Mar 24	2015 Apr 04

31	32	33
2033 Apr 14	2051 Apr 26	2069 May 06

34	35	36
2087 May 17	2105 May 28	2123 Jun 09

37	38	39
2141 Jun 19	2159 Jun 30	2177 Jul 11

40
2195 Jul 22

Inex series

The inex series repeats eclipses 20 days short of 29 years, repeating on average every 10571.95 days. This period is equal to 358 lunations (synodic months) and 388.5 draconic months. Saros series increment by one on successive Inex events and repeat at alternate ascending and descending lunar nodes.

This period is 383.6734 anomalistic months (the period of the Moon's elliptical orbital precession). Despite the average 0.05 time-of-day shift between subsequent events, the variation of the Moon in its elliptical orbit at each event causes the actual eclipse time to vary significantly. It is a part of Lunar Inex series 40.

All events in this series shown (from 1000 to 2500) are central total lunar eclipses.

Inex series from 1000–2500 AD
Descending node		Ascending node		Descending node		Ascending node
Saros	Date	Saros	Date	Saros	Date	Saros	Date
95	1016 May 24	96	1045 May 3	97	1074 Apr 14	98	1103 Mar 25
99	1132 Mar 3	100	1161 Feb 12	101	1190 Jan 23	102	1219 Jan 2
103	1247 Dec 13	104	1276 Nov 23	105	1305 Nov 2	106	1334 Oct 13
107	1363 Sep 23	108	1392 Sep 2	109	1421 Aug 13	110	1450 Jul 24
111	1479 Jul 4	112	1508 Jun 13	113	1537 May 24	114	1566 May 4
115	1595 Apr 24	116	1624 Apr 3	117	1653 Mar 14	118	1682 Feb 21
119	1711 Feb 3	120	1740 Jan 13	121	1768 Dec 23	122	1797 Dec 4
123	1826 Nov 14	124	1855 Oct 25	125	1884 Oct 4	126	1913 Sep 15
127	1942 Aug 26	128	1971 Aug 6	129	2000 Jul 16	130	2029 Jun 26
131	2058 Jun 6	132	2087 May 17	133	2116 Apr 27	134	2145 Apr 7
135	2174 Mar 18	136	2203 Feb 26	137	2232 Feb 7	138	2261 Jan 17
139	2289 Dec 27	140	2318 Dec 9	141	2347 Nov 19	142	2376 Oct 28
143	2405 Oct 8	144	2434 Sep 18	145	2463 Aug 29	146	2492 Aug 8

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 139.