The Moon on this date
Moon on Sunday, August 21, 1977
First Quarter
45.8% illuminated · waxing
Shown at midday from Columbus, US.
Rise, set and path
Times for Columbus, US
- Moonrise
- E
- Highest
- 33°
- Moonset
- –
60°30°
Horizon
2:00 PM
33°
Key figures
- Illuminated
- 45.8%
- Age
- 6.8 days
- Distance
- 370,800 km
- Apparent size
- 32.2′
- Constellation
- Libra
- Lunation number
- 676
Events on this date
-
First Quarter
Half of the disc is lit. The Moon is high at sunset and sets around midnight.
Exact values
For Aug 21, 12:00 PM, midday on this date.
| Elongation from the Sun | 85.02° |
|---|---|
| Phase angle | 94.83° |
| Illuminated fraction | 45.79% |
| Altitude / azimuth | -21.8° / 92.8° |
| Right ascension / declination | 15h 28m / -15.63° |
| Ecliptic longitude / latitude | 233.50° / 3.12° |
| Libration in longitude / latitude | -1.42° / -3.66° |
| Sub-solar longitude / latitude | 92.65° / -1.16° |
| Position angle of the axis | 15.2° |
| Position angle of the bright limb | 283.8° |
| Apparent magnitude | -10.0 |
Directions are good to about a hundredth of a degree and the distance to about 50 km; more digits would not mean anything.