Astro Corner
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Celestial object
C/1961 R1 (Humason)
1961 R1, C/1961 R1 (Humason), Humason
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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 designation1961 R1
JPL SPK-ID1001111
Orbit classCOM
Orbit IDJPL 2
Near-Earth objectNo
Potentially hazardousNo
Epoch · JD2438161.5
Eccentricity0.989614099930
Semi-major axis205.419820762 AU
Perihelion distance2.133469731 AU
Orbital period1,075,380.0 days
Earth MOID1.224700000 AU
Jupiter Tisserand-1.588000
Inclination153.27792635°
Absolute magnitude · H—
Diameter—
Albedo—
Last catalogue sync2026-09-18 09:00:03
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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Images of this object
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