Comet · 103P
103P/Hartley 2
Jets from a small, active nucleus
The extended Deep Impact mission, EPOXI, flew past Hartley 2 in 2010 and imaged jets emerging from its irregular nucleus.
Measurements
- Effective diameter
- 1.6 km
- Semimajor axis
- 3.476 AU
- Orbital period
- 2,366.753 Earth days
Orbit, physical values and uncertainties
- eccentricity
- .6935978573940613 ± 1.9437E-8
- semi-major axis
- 3.475652487146584 au ± 2.114E-7
- perihelion distance
- 1.064947369015373 au ± 3.8E-8
- inclination; angle with respect to x-y ecliptic plane
- 13.59946797122405 deg ± 1.9866E-6
- longitude of the ascending node
- 219.7421743331336 deg ± 9.2179E-6
- argument of perihelion
- 181.3218438419628 deg ± 9.5589E-6
- mean anomaly
- 251.7821727285582 deg ± 2.2794E-5
- time of perihelion passage
- 2457863.957983132166 TDB ± .00021474
- sidereal orbital period
- 2366.753060797867 d ± .00021593
- mean motion
- .1521071234523465 deg/d ± 1.3877E-8
- aphelion distance
- 5.886357605277794 au ± 3.5802E-7
- comet total magnitude
- 16.0 ± 0.9
- comet total magnitude slope
- 4.5
- diameter
- 1.6 km
- rotation period
- 18.1 h
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 2457152.5 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.
Deep Impact (DIF)
January 12, 2005 · UTC
Complete source cohort: 9,386 records.