Astro Corner
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Celestial object
C/2003 H3 (NEAT)
2003 H3, C/2003 H3 (NEAT), NEAT
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Reference data
RADate-dependentMoving object · use an ephemeris
DecDate-dependentMoving object · use an ephemeris
Magnitude—
Angular size—
Position angle—
Distance—
Constellation—
Solar System catalogue
JPL SBDBMoving-object reference
Comets and minor planets move against the background sky. Astro Corner therefore keeps their orbital catalogue record separately and does not pretend a single RA/Dec is permanently correct.
Primary designation2003 H3
JPL SPK-ID1000436
Orbit classCOM
Orbit IDJPL 34
Near-Earth objectNo
Potentially hazardousNo
Epoch · JD2452852.5
Eccentricity0.999781749684
Semi-major axis13294.090063232 AU
Perihelion distance2.901439353 AU
Orbital period559,868,910.6 days
Earth MOID1.887780000 AU
Jupiter Tisserand1.550000
Inclination42.81167543°
Absolute magnitude · H—
Comet total magnitude · M111.8000 · K1 5.5000
Diameter—
Albedo—
Last catalogue sync2026-09-18 08:10:02
Planning coordinates are intentionally separate.A later Horizons ephemeris layer can calculate the object's apparent position for a specific date, time and observing location. Until then, static-sky tools are hidden for this record rather than showing misleading coordinates.
Open JPL Small-Body Database 
Reference transparencySources & data provenanceSee where catalogue identities and imported reference fields came from.4 records
Community observations
No public community observations for this object yet.
Guides & knowledge
Published Guides that reference this canonical object.
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Images of this object
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