Astro Corner
Your corner of the universe.
EN
Celestial object
C/2007 Q3 (Siding Spring)
2007 Q3, C/2007 Q3 (Siding Spring), Siding Spring
Make this Object part of your astronomy journeyMembers can add targets, record observations, link images and watch this Object for visibility alerts.
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 designation2007 Q3
JPL SPK-ID1002472
Orbit classHYP
Orbit IDJPL 121
Near-Earth objectNo
Potentially hazardousNo
Epoch · JD2455063.5
Eccentricity1.000237659306
Semi-major axis-9474.438449323 AU
Perihelion distance2.251688471 AU
Orbital period—
Earth MOID1.261760000 AU
Jupiter Tisserand0.767000
Inclination65.65049210°
Absolute magnitude · H—
Comet total magnitude · M18.8000 · K1 5.5000
Diameter—
Albedo—
Last catalogue sync2026-09-18 10:50:02
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
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.