The Moon on this date
Moon on Sunday, January 31, 1999
Full Moon
100.0% illuminated · waning
Shown at midday from Columbus, US.
Rise, set and path
Times for Columbus, US
- Moonrise
- E
- Highest
- 67°
- Moonset
- W
60°30°
Horizon
6:05 PM
7:34 AM
67°
Key figures
- Illuminated
- 100.0%
- Age
- 14.1 days
- Distance
- 378,600 km
- Apparent size
- 31.5′
- Constellation
- Cancer
- Lunation number
- 941
Events on this date
-
Full Moon
The whole disc is lit. The Moon rises around sunset and stays up all night.
-
Penumbral lunar eclipse
The Moon passes through Earth's faint outer shadow and dims slightly. It starts at 9:06 AM, is deepest at 11:17 AM and ends at 1:28 PM. Not visible from Columbus: the Moon is below the horizon.
Exact values
For Jan 31, 12:00 PM, midday on this date.
| Elongation from the Sun | 180.46° |
|---|---|
| Phase angle | 1.05° |
| Illuminated fraction | 99.99% |
| Altitude / azimuth | -33.1° / 346.8° |
| Right ascension / declination | 8h 56m / 16.33° |
| Ecliptic longitude / latitude | 131.83° / -0.94° |
| Libration in longitude / latitude | 4.97° / 1.99° |
| Sub-solar longitude / latitude | 4.38° / 0.27° |
| Position angle of the axis | 17.5° |
| Position angle of the bright limb | 178.7° |
| Apparent magnitude | -12.8 |
Directions are good to about a hundredth of a degree and the distance to about 50 km; more digits would not mean anything.