Astro Corner
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Celestial object
111P/Helin-Roman-Crockett
111P, 111P/Helin-Roman-Crockett, Helin-Roman-Crockett
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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 designation111P
JPL SPK-ID1000118
Orbit classETc
Orbit IDJPL 8
Near-Earth objectNo
Potentially hazardousNo
Epoch · JD2456320.5
Eccentricity0.109620770408
Semi-major axis4.160365903 AU
Perihelion distance3.704303387 AU
Orbital period3,099.5 days
Earth MOID2.720990000 AU
Jupiter Tisserand3.023000
Inclination4.22880704°
Absolute magnitude · H—
Comet total magnitude · M18.4000 · K1 17.0000
Diameter1.200000 km
Albedo—
Last catalogue sync2026-09-18 07:40:03
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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Published Guides that reference this canonical object.
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Images of this object
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