The Moon on this date
Moon on Saturday, January 31, 1981
Waning Crescent
18.7% illuminated · waning
Shown at midday from Columbus, US.
Rise, set and path
Times for Columbus, US
- Moonrise
- SE
- Highest
- 30°
- Moonset
- SW
60°30°
Horizon
3:59 AM
2:05 PM
30°
Key figures
- Illuminated
- 18.7%
- Age
- 25.4 days
- Distance
- 395,300 km
- Apparent size
- 30.2′
- Constellation
- Ophiuchus
- Lunation number
- 718
Events on this date
-
Moon and Neptune close together
They pass 2.6° apart in the sky.
Exact values
For Jan 31, 12:00 PM, midday on this date.
| Elongation from the Sun | 309.04° |
|---|---|
| Phase angle | 128.81° |
| Illuminated fraction | 18.67% |
| Altitude / azimuth | 18.1° / 222.5° |
| Right ascension / declination | 17h 21m / -19.07° |
| Ecliptic longitude / latitude | 260.80° / 4.06° |
| Libration in longitude / latitude | -4.93° / -4.52° |
| Sub-solar longitude / latitude | -133.50° / -0.01° |
| Position angle of the axis | 3.1° |
| Position angle of the bright limb | 96.7° |
| Apparent magnitude | -8.2 |
Directions are good to about a hundredth of a degree and the distance to about 50 km; more digits would not mean anything.