Astro Corner
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Celestial object
258 Tyche (A886 JA)
258, 258 Tyche (A886 JA), Tyche
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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 designation258
JPL SPK-ID20000258
Orbit classMBA
Orbit IDJPL 109
Near-Earth objectNo
Potentially hazardousNo
Epoch · JD2461200.5
Eccentricity0.204745633945
Semi-major axis2.614922418 AU
Perihelion distance2.079528470 AU
Orbital period1,544.5 days
Earth MOID1.085770000 AU
Jupiter Tisserand3.334000
Inclination14.32517159°
Absolute magnitude · H8.2400
Diameter64.780000 km
Albedo0.167600
Last catalogue sync2026-09-12 01:00:06
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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Images of this object
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