Astro Corner
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Celestial object
P/1999 RO28 (LONEOS)
1999 RO28, LONEOS, P/1999 RO28 (LONEOS)
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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 designation1999 RO28
JPL SPK-ID1000271
Orbit classJFc
Orbit IDJPL 18
Near-Earth objectYes
Potentially hazardousNo
Epoch · JD2452876.5
Eccentricity0.650128773743
Semi-major axis3.525393069 AU
Perihelion distance1.233433596 AU
Orbital period2,417.7 days
Earth MOID0.248953000 AU
Jupiter Tisserand2.714000
Inclination8.18684934°
Absolute magnitude · H—
Comet total magnitude · M120.2000 · K1 9.2500
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
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
Confirmed manual or plate-solve links to this canonical object. Solver suggestions are excluded until confirmed by the image owner.
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