Astro Corner
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Celestial object
C/1988 J1 (Shoemaker-Holt)
1988 J1, C/1988 J1 (Shoemaker-Holt), Shoemaker-Holt
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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 designation1988 J1
JPL SPK-ID1001226
Orbit classCOM
Orbit IDJPL 2
Near-Earth objectNo
Potentially hazardousNo
Epoch · JD2447335.5
Eccentricity0.997807767722
Semi-major axis535.749412706 AU
Perihelion distance1.174487156 AU
Orbital period4,529,403.2 days
Earth MOID0.249062000 AU
Jupiter Tisserand0.623000
Inclination62.80704967°
Absolute magnitude · H—
Comet total magnitude · M15.9000 · K1 21.5000
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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