Astro Corner
Your corner of the universe.
EN
Celestial object
339 Dorothea (A892 SC)
339, 339 Dorothea (A892 SC), Dorothea
Make this Object part of your astronomy journeyMembers can add targets, record observations, link images and watch this Object for visibility alerts.
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 designation339
JPL SPK-ID20000339
Orbit classMBA
Orbit IDJPL 77
Near-Earth objectNo
Potentially hazardousNo
Epoch · JD2461200.5
Eccentricity0.102244521285
Semi-major axis3.008997131 AU
Perihelion distance2.701343660 AU
Orbital period1,906.5 days
Earth MOID1.693120000 AU
Jupiter Tisserand3.219000
Inclination9.95784602°
Absolute magnitude · H9.4000
Diameter44.329000 km
Albedo0.198000
Last catalogue sync2026-09-12 01:00:08
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
No public community observations for this object yet.
Guides & knowledge
Published Guides that reference this canonical object.
No published Guides reference this object yet.
Images of this object
Confirmed manual or plate-solve links to this canonical object. Solver suggestions are excluded until confirmed by the image owner.
No visible confirmed images are linked to this object yet.