+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   D/1993 F2-Q1 (Shoemaker-Levy 9) Classification: Jupiter-family Comet          SPK-ID: 1000196 [ 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 Q63 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2074042610723228 4.6058e-06   a 6.787001258663356 4.0286e-05 au q 5.379348277713357 3.308e-06 au i 5.822818702804071 3.6833e-05 deg node 220.9279851444948 8.7325e-05 deg peri 355.0109920624971 0.0012219 deg M 2.158831330388483 0.00080298 deg tp 2449441.771423636210 (1994-Mar-30.27142364) 0.014084 TDB period 6458.256972051392 17.68 0.057502 0.0001574 d yr n .05574259456660333 4.9631e-07 deg/d Q 8.194654239613353 4.8642e-05 au   Orbit Determination Parameters    planetary ephem.      DE403      source      ORB   Additional Information  Earth MOID = 4.37284 au   Jupiter MOID = .00490633 au   T_jup = 2.990   not valid before 1992-Jul-15.00000000   not valid after 1994-Jul-20.84166666   Valid 1992-Jul-15_00:00 to 1994-Jul-20_20:12 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-Q1        [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Close-Approach Data ] 2021-Jan-21 16:10 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin