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Lunar Calendar Month May 2018 (Northern Hemisphere)

The Moon is the only natural satellite of the Earth and the fifth largest moon in the Solar System. It is the largest natural satellite in the solar system relative to the size of its planet. The following is information specific for Washington, Northern Hemisphere during May 2018.

Choose a country from the list to get relevant information:

Date and time of moon phases

The information in the following table comes from calculations published by the Astronomical Applications Department of the U.S. Naval Observatory.

Moon phasesDatesTime
3rd quarter2018-05-0722:09
new moon2018-05-1507:48
1st quarter2018-05-2123:49
full moon2018-05-2910:19

Apogee and perigee of the Moon

The following table shows the dates of perigee and apogee of the Moon during May 2018.

PositionDatesTimeDistanceNotes
Apogee2018-05-0520:36404,457 km
Perigee2018-05-1717:07363,776 km

Moon-Planet Conjunctions

A Moon-planet conjunction occurs when an astronomical object has either the same, or nearly the same, right ascension or the same ecliptic longitude of that of the Moon, as observed from Earth.

Astronomical ObjectsDate and Time
Saturn2018-05-04 16:31
Mars2018-05-06 03:24
Mercury2018-05-13 13:21
Venus2018-05-17 14:11
Beehive2018-05-20 07:57
Regulus2018-05-21 20:53
Jupiter2018-05-27 13:39
Saturn2018-05-31 21:20

Illumination of the Moon

The following table depicts the illumination of the Moon, calculated at 00:00, throughtout the 31 days of May 2018.

May 2018
wMondayTuesdayWednesdayThursdayFridaySaturdaySunday
Week 18
30Monday
 
1Tuesday
 
98.6% illuminated
Age:15.9
2Wednesday
 
95.4% illuminated
Age:16.8
3Thursday
 
90.4% illuminated
Age:17.7
4Friday
 
83.9% illuminated
Age:18.6
5Saturday
 
76.3% illuminated
Age:19.5
6Sunday
 
67.8% illuminated
Age:20.4
Week 19
7Monday
 
58.7% illuminated
Age:21.3
8Tuesday
 
49.2% illuminated
Age:22.2
9Wednesday
 
39.7% illuminated
Age:23.1
10Thursday
 
30.3% illuminated
Age:24.1
11Friday
 
21.4% illuminated
Age:25
12Saturday
 
13.5% illuminated
Age:26
13Sunday
 
7% illuminated
Age:27
Week 20
14Monday
 
2.4% illuminated
Age:28.1
15Tuesday
 
0.2% illuminated
Age:29.2
16Wednesday
 
0.6% illuminated
Age:0.7
17Thursday
 
3.9% illuminated
Age:1.9
18Friday
 
9.9% illuminated
Age:3
19Saturday
 
18.1% illuminated
Age:4.1
20Sunday
 
28% illuminated
Age:5.2
Week 21
21Monday
 
38.9% illuminated
Age:6.3
22Tuesday
 
50.2% illuminated
Age:7.4
23Wednesday
 
61.2% illuminated
Age:8.4
24Thursday
 
71.5% illuminated
Age:9.5
25Friday
 
80.7% illuminated
Age:10.5
26Saturday
 
88.3% illuminated
Age:11.5
27Sunday
 
94.1% illuminated
Age:12.5
Week 22
28Monday
 
98% illuminated
Age:13.4
29Tuesday
 
99.8% illuminated
Age:14.4
30Wednesday
 
99.7% illuminated
Age:15.3
31Thursday
 
97.7% illuminated
Age:16.2
1Friday
 
2Saturday
 
3Sunday
 
4Monday
 
5Tuesday
 
6Wednesday
 
7Thursday
 
8Friday
 
9Saturday
 
10Sunday
 
11Monday
 
12Tuesday
 
13Wednesday
 
14Thursday
 
15Friday
 
16Saturday
 
17Sunday
 
Content last updated on 2018-10-21T17:33:00Z