Astro Corner
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Celestial object
C/2009 R1 (McNaught)
2009 R1, C/2009 R1 (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 designation2009 R1
JPL SPK-ID1003036
Orbit classHYP
Orbit IDJPL 29
Near-Earth objectNo
Potentially hazardousNo
Epoch · JD2455297.5
Eccentricity1.000413202491
Semi-major axis-980.359275213 AU
Perihelion distance0.405086894 AU
Orbital period—
Earth MOID0.446156000 AU
Jupiter Tisserand—
Inclination77.03076498°
Absolute magnitude · H—
Comet total magnitude · M19.9000 · K1 6.7500
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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Guides & knowledge
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Images of this object
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