First Quarter Moon
Monday, 21 August 1939 · 22:21 local in London
1939-08-21 21:21 UTC · Europe/London
First Quarter Moon occurs at 22:21 local time in London on 21 August. 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
6°
At the exact phase
Illumination
50%
First Quarter
Local date
21 Aug
1939
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 (6°) 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 22:21 local · NASA LRO surface
Next moonrise
15:03
Next moonset
23:15
Next events
Calendar →Aug 1939
29
Full Moon
Above horizon23:09 local · Tue, Tue 29 Aug · Moon 28°
Sept 1939
6
Last Quarter Moon
Below horizon21:25 local · Wed, Wed 6 Sept · Moon -12°
Sept 1939
13
New Moon
Not visible12:22 local · Wed, Wed 13 Sept · Moon 38°
Sept 1939
20
First Quarter Moon
Below horizon11:34 local · Wed, Wed 20 Sept · Moon -27°