+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   D/1993 F2-S (Shoemaker-Levy 9) Classification: Jupiter-family Comet          SPK-ID: 1000199 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Close-Approach Data ] [ show orbit diagram ] Orbital Elements at Epoch 2449480.5 (1994-May-08.0) TDB Reference: JPL S62 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2057367846395425 4.5289e-06   a 6.772476723767354 3.9703e-05 au q 5.379129138573315 4.1726e-06 au i 5.788483286955185 4.448e-05 deg node 221.0066546466664 9.0952e-05 deg peri 355.033366236503 0.0012626 deg M 2.096821312879368 0.00082983 deg tp 2449443.004544829067 (1994-Mar-31.50454483) 0.014559 TDB period 6437.536560041847 17.63 0.05661 0.000155 d yr n .05592201250312741 4.9176e-07 deg/d Q 8.165824308961392 4.7872e-05 au   Orbit Determination Parameters    planetary ephem.      DE403      source      ORB   Additional Information  Earth MOID = 4.37259 au   Jupiter MOID = .00488139 au   T_jup = 2.990   not valid before 1992-Jul-15.00000000   not valid after 1994-Jul-21.63541666   Valid 1992-Jul-15_00:00 to 1994-Jul-21_15:15 UTC ERT  [ show covariance matrix ] [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Close-Approach Data ] no physical parameters available [ show close-approach data ] Alternate Designations  Perihelion  Year (est.)  New-Style  Desig Roman  Numeral  Year/  Letter   1994.2   D/1993 F2-S        [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Close-Approach Data ] 2021-Jan-21 16:23 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin