Astro Corner
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Celestial object
299 Thora (A890 TA)
299, 299 Thora (A890 TA), Thora
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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 designation299
JPL SPK-ID20000299
Orbit classMBA
Orbit IDJPL 83
Near-Earth objectNo
Potentially hazardousNo
Epoch · JD2461200.5
Eccentricity0.062369826064
Semi-major axis2.434206741 AU
Perihelion distance2.282385690 AU
Orbital period1,387.2 days
Earth MOID1.286780000 AU
Jupiter Tisserand3.502000
Inclination1.60840611°
Absolute magnitude · H11.3500
Diameter15.757000 km
Albedo0.251000
Last catalogue sync2026-09-12 01:00:07
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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Images of this object
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