Astro Corner
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Celestial object
171 Ophelia (A877 AB)
171, 171 Ophelia (A877 AB), Ophelia
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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 designation171
JPL SPK-ID20000171
Orbit classMBA
Orbit IDJPL 159
Near-Earth objectNo
Potentially hazardousNo
Epoch · JD2461200.5
Eccentricity0.132912024674
Semi-major axis3.128731816 AU
Perihelion distance2.712885735 AU
Orbital period2,021.4 days
Earth MOID1.724080000 AU
Jupiter Tisserand3.199000
Inclination2.54698652°
Absolute magnitude · H8.6300
Diameter130.808000 km
Albedo0.076000
Last catalogue sync2026-09-11 01:40:09
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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