Astro Corner
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Celestial object
261P/Larson
261P, 261P/Larson, Larson
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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 designation261P
JPL SPK-ID1001652
Orbit classJFc
Orbit IDJPL 74
Near-Earth objectNo
Potentially hazardousNo
Epoch · JD2457671.5
Eccentricity0.418689203356
Semi-major axis3.524287223 AU
Perihelion distance2.048706213 AU
Orbital period2,416.6 days
Earth MOID1.052270000 AU
Jupiter Tisserand2.963000
Inclination6.05005689°
Absolute magnitude · H—
Comet total magnitude · M15.6000 · K1 32.7500
Diameter—
Albedo—
Last catalogue sync2026-09-18 09:50:02
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
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