Astro Corner
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Celestial object
161P/Hartley-IRAS
161P, 161P/Hartley-IRAS, Hartley-IRAS
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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 designation161P
JPL SPK-ID1000042
Orbit classHTC
Orbit IDJPL 73
Near-Earth objectYes
Potentially hazardousNo
Epoch · JD2456472.5
Eccentricity0.836248424104
Semi-major axis7.719188012 AU
Perihelion distance1.264029202 AU
Orbital period7,833.5 days
Earth MOID0.435726000 AU
Jupiter Tisserand0.541000
Inclination95.71981510°
Absolute magnitude · H—
Comet total magnitude · M115.0000 · K1 5.2500
Diameter—
Albedo—
Last catalogue sync2026-09-18 07:40:03
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.
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Images of this object
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