Astro Corner
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Celestial object
C/1921 H1 (Dubiago)
1921 H1, C/1921 H1 (Dubiago), Dubiago
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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 designation1921 H1
JPL SPK-ID1000024
Orbit classHTC
Orbit IDJPL 10
Near-Earth objectYes
Potentially hazardousNo
Epoch · JD2422830.5
Eccentricity0.934738163936
Semi-major axis17.102222886 AU
Perihelion distance1.116122466 AU
Orbital period25,833.1 days
Earth MOID0.383500000 AU
Jupiter Tisserand1.496000
Inclination22.34540252°
Absolute magnitude · H—
Diameter—
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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Images of this object
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