Astro Corner
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Celestial object
C/2011 C1 (McNaught)
2011 C1, C/2011 C1 (McNaught), McNaught
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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 designation2011 C1
JPL SPK-ID1003120
Orbit classCOM
Orbit IDJPL 34
Near-Earth objectNo
Potentially hazardousNo
Epoch · JD2455666.5
Eccentricity0.997433178320
Semi-major axis344.152599065 AU
Perihelion distance0.883378352 AU
Orbital period2,331,981.0 days
Earth MOID0.183600000 AU
Jupiter Tisserand1.130000
Inclination16.82561724°
Absolute magnitude · H—
Comet total magnitude · M112.7000 · K1 17.5000
Diameter—
Albedo—
Last catalogue sync2026-09-18 11:40:02
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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