+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   D/1993 F2-D (Shoemaker-Levy 9) Classification: Jupiter-family Comet          SPK-ID: 1000184 [ 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 D29 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2147253447713383 5.8785e-06   a 6.851576927754675 5.3186e-05 au q 5.380369709715205 4.7711e-06 au i 5.972967602904458 5.7973e-05 deg node 220.6003060582256 0.00011253 deg peri 354.9131082615112 0.001625 deg M 2.412564931136775 0.0010506 deg tp 2449436.600381701976 (1994-Mar-25.10038170) 0.01866 TDB period 6550.647563231399 17.93 0.076275 0.0002088 d yr n .05495639881783137 6.399e-07 deg/d Q 8.322784145794143 6.4606e-05 au   Orbit Determination Parameters    planetary ephem.      DE403      source      ORB   Additional Information  Earth MOID = 4.37398 au   Jupiter MOID = .00511837 au   T_jup = 2.989   not valid before 1992-Jul-15.00000000   not valid after 1994-Jul-17.49583333   Valid 1992-Jul-15_00:00 to 1994-Jul-17_11:54 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-D        [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Close-Approach Data ] 2021-Jan-21 16:19 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin