Astro Corner
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Celestial object
C/2018 R5 (Lemmon)
2018 R5, C/2018 R5 (Lemmon), Lemmon
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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 designation2018 R5
JPL SPK-ID1003588
Orbit classHTC
Orbit IDJPL 6
Near-Earth objectNo
Potentially hazardousNo
Epoch · JD2458380.5
Eccentricity0.841568102359
Semi-major axis22.856690575 AU
Perihelion distance3.621228862 AU
Orbital period39,913.4 days
Earth MOID2.615660000 AU
Jupiter Tisserand-0.311000
Inclination103.75808059°
Absolute magnitude · H—
Comet total magnitude · M114.4000 · K1 4.5000
Diameter—
Albedo—
Last catalogue sync2026-09-18 12:20:03
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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