+ View the NASA Portal + Near-Earth Object (NEO) Program Search JPL JPL Small-Body Database Browser Search: [ help ]   C/1989 Y1 (Skorichenko-George) Classification: Hyperbolic Comet          SPK-ID: 1001242 [ Ephemeris | Orbit Diagram | Orbital Elements ] [ show orbit diagram ] Orbital Elements at Epoch 2448000.5 (1990-Apr-19.0) TDB Reference: SAO_2008 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e 1.000308 n/a   a -5094.7142857 n/a AU q 1.569172 n/a AU i 59.3660 n/a deg node 280.0093 n/a deg peri 137.8329 n/a deg M 0.0000192 n/a deg tp 2447993.4292 (1990-Apr-11.92920000) n/a JED period n/a n/a n/a n/a d yr n 0.0000027 n/a deg/d Q n/a n/a AU   Orbit Determination Parameters    # obs. used (total)      93      data-arc span      453 days (1.24 yr)      first obs. used      1989-12-20      last obs. used      1991-03-18      producer      Muraoka   Additional Information  2008 SAO Comet Catalog  [ Ephemeris | Orbit Diagram | Orbital Elements ] no physical parameters available [ Ephemeris | Orbit Diagram | Orbital Elements ] 2013-May-20 01:43 UT (server date/time)   Site Manager:   Donald K. Yeomans Webmaster:   Alan B. Chamberlin