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Celestial object
C/1999 H1 (Lee)
1999 H1, C/1999 H1 (Lee), Lee
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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 designation1999 H1
JPL SPK-ID1000250
Orbit classCOM
Orbit IDJPL 43
Near-Earth objectNo
Potentially hazardousNo
Epoch · JD2451407.5
Eccentricity0.999744746197
Semi-major axis2774.129591794 AU
Perihelion distance0.708107129 AU
Orbital period53,368,936.0 days
Earth MOID0.150509000 AU
Jupiter Tisserand-0.896000
Inclination149.35290520°
Absolute magnitude · H—
Comet total magnitude · M19.4000 · K1 11.0000
Diameter—
Albedo—
Last catalogue sync2026-09-18 07:50:02
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
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