+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   195P/Hill Classification: Jupiter-family Comet          SPK-ID: 1002431 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ] [ show orbit diagram ] Orbital Elements at Epoch 2454494.5 (2008-Jan-29.0) TDB Reference: JPL 37 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .315047798798942 1.8038e-07   a 6.47960643491348 8.3478e-07 au q 4.438220690510528 1.1378e-06 au i 36.36748420072287 1.9191e-05 deg node 243.2611246188573 2.4615e-05 deg peri 249.6535742516584 8.2761e-05 deg M 338.5816063674453 4.5845e-05 deg tp 2454852.931165179588 (2009-Jan-21.43116518) 0.0007584 TDB period 6024.504996888555 16.49 0.0011642 3.187e-06 d yr n .05975594678499351 1.1548e-08 deg/d Q 8.520992179316432 1.0978e-06 au   Orbit Determination Parameters    # obs. used (total)      253      data-arc span      7042 days (19.28 yr)      first obs. used      1993-02-26      last obs. used      2012-06-08      planetary ephem.      DE431      SB-pert. ephem.      SB431-BIG16      condition code      0      norm. resid. RMS      .74106      source      ORB      producer      Otto Matic      solution date      2014-Jun-13 19:41:52   Additional Information  Earth MOID = 3.6438 au   T_jup = 2.509  [ show covariance matrix ] [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes comet total magnitude M1 8.6   0.4 37 2 parameter fit from 96 observations, autocmod 2.5c comet total magnitude slope K1 10.   n/a 37 autocmod 2.5c comet nuclear magnitude M2 12.5   0.7 37 from 111 observations, autocmod 2.5c comet nuclear magnitude slope K2 5.   n/a 37 autocmod 2.5c comet nuclear phase coefficient PC 0.03   n/a 37 autocmod 2.5c [ show close-approach data ] Alternate Designations  Perihelion  Year (est.)  New-Style  Desig Roman  Numeral  Year/  Letter   2009.1   195P/2006 W4         1992.6   195P/1993 D1        [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ] 2021-Feb-25 17:02 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin