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Comet Hale-Bopp

Perihielion Date 1997-03-31
Perihielion Distance 0.914
Closest Approach ( AU ) 1.3
Closest Approach Date 1997-03-22
Absolute Magnitude -1
Semi-major axis ( AU ) 250
Orbit Period ( days ) 4000
Orbital Inclination ( degs ) 89.4
Orbital Eccentricity 0.995

Data Source N.A.S.A.