Astro Corner
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Celestial object
171P/Spahr
171P, 171P/Spahr, Spahr
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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 designation171P
JPL SPK-ID1000239
Orbit classJFc
Orbit IDJPL K254/9
Near-Earth objectNo
Potentially hazardousNo
Epoch · JD2458232.5
Eccentricity0.501947929833
Semi-major axis3.558206520 AU
Perihelion distance1.772172124 AU
Orbital period2,451.6 days
Earth MOID0.793667000 AU
Jupiter Tisserand2.789000
Inclination21.93309363°
Absolute magnitude · H—
Comet total magnitude · M111.6000 · K1 22.7500
Diameter—
Albedo—
Last catalogue sync2026-09-18 07:50:02
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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