The Moon on this date
Moon on Saturday, August 17, 1991
First Quarter
54.6% illuminated · waxing
Shown at midday from Columbus, US.
Rise, set and path
Times for Columbus, US
- Moonrise
- SE
- Highest
- 25°
- Moonset
- –
60°30°
Horizon
3:10 PM
25°
Key figures
- Illuminated
- 54.6%
- Age
- 7.6 days
- Distance
- 399,100 km
- Apparent size
- 29.9′
- Constellation
- Scorpius
- Lunation number
- 849
Events on this date
-
First Quarter
Half of the disc is lit. The Moon is high at sunset and sets around midnight.
-
Jupiter behind the Sun
On the far side of the Sun and lost in its glare.
Exact values
For Aug 17, 12:00 PM, midday on this date.
| Elongation from the Sun | 95.14° |
|---|---|
| Phase angle | 84.72° |
| Illuminated fraction | 54.60% |
| Altitude / azimuth | -33.2° / 95.0° |
| Right ascension / declination | 15h 45m / -23.87° |
| Ecliptic longitude / latitude | 239.40° / -3.94° |
| Libration in longitude / latitude | 6.29° / 5.33° |
| Sub-solar longitude / latitude | 90.18° / -0.94° |
| Position angle of the axis | 13.6° |
| Position angle of the bright limb | 282.1° |
| Apparent magnitude | -10.2 |
Directions are good to about a hundredth of a degree and the distance to about 50 km; more digits would not mean anything.