Astro Corner
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Celestial object
C/1910 A1 (Great January comet)
1910 A1, C/1910 A1 (Great January comet), Great January comet
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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 designation1910 A1
JPL SPK-ID1000967
Orbit classCOM
Orbit IDJPL 4
Near-Earth objectNo
Potentially hazardousNo
Epoch · JD2418705.5
Eccentricity0.999780103050
Semi-major axis586.449592563 AU
Perihelion distance0.128958477 AU
Orbital period5,187,337.0 days
Earth MOID0.029453000 AU
Jupiter Tisserand-0.326000
Inclination138.77802386°
Absolute magnitude · H—
Diameter—
Albedo—
Last catalogue sync2026-09-18 08:50:02
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
Community observations
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Guides & knowledge
Published Guides that reference this canonical object.
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Images of this object
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