Astro Corner
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Celestial object
C/1984 W2 (Hartley)
1984 W2, C/1984 W2 (Hartley), Hartley
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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 designation1984 W2
JPL SPK-ID1001204
Orbit classCOM
Orbit IDJPL 2
Near-Earth objectNo
Potentially hazardousNo
Epoch · JD2446479.5
Eccentricity0.999472951992
Semi-major axis7589.981411667 AU
Perihelion distance4.000284585 AU
Orbital period241,523,556.6 days
Earth MOID3.646130000 AU
Jupiter Tisserand0.030000
Inclination89.32693896°
Absolute magnitude · H—
Diameter—
Albedo—
Last catalogue sync2026-09-18 09:10:02
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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Images of this object
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