Astro Corner
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Celestial object
78 Diana (A863 EA)
78, 78 Diana (A863 EA), Diana
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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 designation78
JPL SPK-ID20000078
Orbit classMBA
Orbit ID133
Near-Earth objectNo
Potentially hazardousNo
Epoch · JD2461200.5
Eccentricity0.203532997184
Semi-major axis2.622547558 AU
Perihelion distance2.088772594 AU
Orbital period1,551.3 days
Earth MOID1.107570000 AU
Jupiter Tisserand3.358000
Inclination8.67948863°
Absolute magnitude · H8.3900
Diameter120.600000 km
Albedo0.070600
Last catalogue sync2026-09-11 01:40:06
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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