Astro Corner
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Celestial object
C/2017 C1 (NEOWISE)
2017 C1, C/2017 C1 (NEOWISE), NEOWISE
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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 designation2017 C1
JPL SPK-ID1003498
Orbit classHTC
Orbit IDJPL 7
Near-Earth objectNo
Potentially hazardousNo
Epoch · JD2457818.5
Eccentricity0.927815523573
Semi-major axis20.804402939 AU
Perihelion distance1.501754934 AU
Orbital period34,660.2 days
Earth MOID0.913583000 AU
Jupiter Tisserand0.863000
Inclination65.75224118°
Absolute magnitude · H—
Comet total magnitude · M118.1000 · K1 8.5000
Diameter—
Albedo—
Last catalogue sync2026-09-18 12:10:02
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
No public community observations for this object yet.
Guides & knowledge
Published Guides that reference this canonical object.
No published Guides reference this object yet.
Images of this object
Confirmed manual or plate-solve links to this canonical object. Solver suggestions are excluded until confirmed by the image owner.
No visible confirmed images are linked to this object yet.