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Celestial object
C/2009 U3 (Hill)
2009 U3, C/2009 U3 (Hill), Hill
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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 designation2009 U3
JPL SPK-ID1003046
Orbit classCOM
Orbit IDJPL 36
Near-Earth objectNo
Potentially hazardousNo
Epoch · JD2455197.5
Eccentricity0.991576508728
Semi-major axis167.914293845 AU
Perihelion distance1.414424589 AU
Orbital period794,748.9 days
Earth MOID0.867814000 AU
Jupiter Tisserand0.952000
Inclination51.26076676°
Absolute magnitude · H—
Comet total magnitude · M115.4000 · K1 6.0000
Diameter—
Albedo—
Last catalogue sync2026-09-18 11:30:02
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
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Published Guides that reference this canonical object.
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Images of this object
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