Ulla
909 Ulla (A919 CA)
📋 A written introduction is coming — for now this page shows official values only.
Physical data
- Diameter
- 116.44 km
- Rotation period
- 8.7155 hours
- Albedo
- 0.0343
- Absolute magnitude H
- 8.74 mag
- Spectral type (Tholen)
- X
Orbit
- Orbit class (JPL)
- OMB — Outer Main-belt Asteroid
- Semi-major axis
- 3.54 AU
- Eccentricity
- 0.0947
- Inclination
- 18.8°
- Perihelion distance
- 3.21 AU
- Aphelion distance
- 3.88 AU
- Orbital period
- 2,430 days
- Perihelion passage
- JD 2460197.781
- Earth MOID
- 2.24 AU
Earth approach
- Potentially hazardous (PHA)
- No
- Near-Earth object (NEO)
- No
In everyday life
- About 116 km across — 29.1% of the 400 km Seoul–Busan expressway.
- One orbit takes about 2,430 Earth days (about 6.7 years).
- Sunlight needs about 29 minutes to reach it on average (semi-major axis 3.5 AU) — versus about 8 min 19 s to Earth.
Worked out from this object's official values.