Astro Corner
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Celestial object
C/2021 K3 (Catalina)
2021 K3, C/2021 K3 (Catalina), Catalina
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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 designation2021 K3
JPL SPK-ID1003789
Orbit classHYP
Orbit IDJPL 6
Near-Earth objectNo
Potentially hazardousNo
Epoch · JD2459411.5
Eccentricity1.003561449420
Semi-major axis-1468.531415346 AU
Perihelion distance5.230100357 AU
Orbital period—
Earth MOID4.213960000 AU
Jupiter Tisserand—
Inclination134.80440824°
Absolute magnitude · H—
Comet total magnitude · M114.5000 · K1 4.5000
Diameter—
Albedo—
Last catalogue sync2026-09-18 12:30:02
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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Guides & knowledge
Published Guides that reference this canonical object.
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Images of this object
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