Active asteroid · 311P
311P/PANSTARRS
Measurements
- Effective diameter
- Not available
- Semimajor axis
- 2.189 AU
- Orbital period
- 1,182.658 Earth days
Orbit, physical values and uncertainties
- eccentricity
- .1153922035309233 ± 1.2094E-7
- semi-major axis
- 2.188637820174267 au ± 1.7303E-8
- perihelion distance
- 1.936086079373242 au ± 2.6867E-7
- inclination; angle with respect to x-y ecliptic plane
- 4.969908606889174 deg ± 9.9139E-6
- longitude of the ascending node
- 279.2275645163579 deg ± .00020397
- argument of perihelion
- 144.5819385064015 deg ± .00023606
- mean anomaly
- 358.0425637802983 deg ± .00010365
- time of perihelion passage
- 2459129.930494863780 TDB ± .0003405
- sidereal orbital period
- 1182.65827905934 d ± 1.4025E-5
- mean motion
- .3043990021245495 deg/d ± 3.6099E-9
- aphelion distance
- 2.441189560975292 au ± 1.93E-8
- comet total magnitude
- 19.3 ± 0.6
- comet total magnitude slope
- 4.5
Published JPL orbital elements describe their stated epoch; they are not current positions. Small-body diameters can be effective/model-dependent sizes, not spherical shapes. Missing measurements remain unavailable. Pluto’s diameter uses the New Horizons reference rather than an empty SBDB field. Orbital epoch: JD 2459123.5 TDB.
Object reference ↗Missions & milestones
1 launches · 0 connected events
These are target-related flights and every connected programme record in the production catalogue. A connected event may concern another stage or target of the same journey. Launch outcome does not establish arrival or current operation.
TARGET-RELATED FLIGHT
→Tianwen-2
May 28, 2025 · UTC
Complete source cohort: 9,386 records.