+ 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 2454492.5 (2008-Jan-27.0) TDB Reference: JPL 38 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .3150495598886983 1.8102e-07   a 6.479618405208505 8.3496e-07 au q 4.438217478400857 1.1431e-06 au i 36.3675062092703 1.9229e-05 deg node 243.2611482002586 2.469e-05 deg peri 249.6537017235729 8.2979e-05 deg M 338.4621088324292 4.5928e-05 deg tp 2454852.931923672737 (2009-Jan-21.43192367) 0.00075968 TDB period 6024.521691220893 16.49 0.0011645 3.188e-06 d yr n .05975578119746874 1.155e-08 deg/d Q 8.521019332016154 1.098e-06 au   Orbit Determination Parameters    # obs. used (total)      252      data-arc span      7042 days (19.28 yr)      first obs. used      1993-02-26      last obs. used      2012-06-08      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .72818      source      ORB      producer      Otto Matic      solution date      2021-Apr-15 23:27:52   Additional Information  Earth MOID = 3.64379 au   Jupiter MOID = .170396 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 8.4   0.4 38 2 parameter fit from 96 observations, autocmod 2.9c comet total magnitude slope K1 10.25   n/a 38 autocmod 2.9c comet nuclear magnitude M2 12.5   0.7 38 from 111 observations, autocmod 2.9c comet nuclear magnitude slope K2 5.   n/a 38 autocmod 2.9c comet nuclear phase coefficient PC 0.03   n/a 38 autocmod 2.9c [ 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-Apr-17 22:21 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin