Astro Corner
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Celestial object
29P/Schwassmann-Wachmann 1
29P, 29P/Schwassmann-Wachmann 1, Schwassmann-Wachmann
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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 designation29P
JPL SPK-ID1000079
Orbit classJFc
Orbit IDJPL K192/82
Near-Earth objectNo
Potentially hazardousNo
Epoch · JD2459866.5
Eccentricity0.044798144517
Semi-major axis6.045976555 AU
Perihelion distance5.775128023 AU
Orbital period5,430.0 days
Earth MOID4.780000000 AU
Jupiter Tisserand2.986000
Inclination9.36477141°
Absolute magnitude · H—
Comet total magnitude · M110.1000 · K1 4.5000
Diameter60.400000 km
Albedo0.033000
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
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Images of this object
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