Astro Corner
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Celestial object
77P/Longmore
77P, 77P/Longmore, Longmore
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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 designation77P
JPL SPK-ID1000059
Orbit classJFc
Orbit IDJPL 81
Near-Earth objectNo
Potentially hazardousNo
Epoch · JD2456696.5
Eccentricity0.354167115364
Semi-major axis3.612874447 AU
Perihelion distance2.333313126 AU
Orbital period2,508.3 days
Earth MOID1.338930000 AU
Jupiter Tisserand2.860000
Inclination24.34010146°
Absolute magnitude · H—
Comet total magnitude · M19.2000 · K1 14.5000
Diameter8.200000 km
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
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Images of this object
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