First Quarter Moon
Monday, 20 May 1991 · 20:46 local in London
1991-05-20 19:46 UTC · Europe/London
First Quarter Moon occurs at 20:46 local time in London on 20 May. Half of the visible disc is lit, and the terminator cuts across the middle. Long shadows make craters along the dividing line stand out.
Moon altitude
42°
At the exact phase
Illumination
50%
First Quarter
Local date
20 May
1991
Viewing tips
- Look along the terminator for the strongest crater shadows.
- The Moon is highest in the evening during this phase.
- Binoculars are enough to see major craters and maria.
Visibility, honestly
Above the horizon (42°) at the exact moment.
A phase is a global instant; whether it is above your horizon depends on location. Weather is not included here. Check the tonight outlook for cloud cover and a viewing score. No eclipse or conjunction claim is made on this page.
Phase times from Astronomy Engine. Rise/set and altitude use atmospheric refraction. Method
First Quarter · 50% lit
Phase at 20:46 local · NASA LRO surface
Next moonrise
13:17
Next moonset
01:56
Next events
Calendar →May 1991
28
Full Moon
Below horizon12:37 local · Tue, Tue 28 May · Moon -63°
Jun 1991
5
Last Quarter Moon
Below horizon16:30 local · Wed, Wed 5 Jun · Moon -32°
Jun 1991
12
New Moon
Not visible13:06 local · Wed, Wed 12 Jun · Moon 64°
Jun 1991
19
First Quarter Moon
Below horizon05:20 local · Wed, Wed 19 Jun · Moon -38°