Astro Corner
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Celestial object
129 Antigone (A873 CA)
129, 129 Antigone (A873 CA), Antigone
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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 designation129
JPL SPK-ID20000129
Orbit classMBA
Orbit ID145
Near-Earth objectNo
Potentially hazardousNo
Epoch · JD2461200.5
Eccentricity0.213157511493
Semi-major axis2.867788583 AU
Perihelion distance2.256497905 AU
Orbital period1,773.9 days
Earth MOID1.277530000 AU
Jupiter Tisserand3.232000
Inclination12.27021817°
Absolute magnitude · H7.0200
Diameter113.000000 km
Albedo0.151000
Last catalogue sync2026-09-11 01:40:07
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
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Images of this object
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