+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   375P/Hill Classification: Jupiter-family Comet          SPK-ID: 1002323 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ] [ show orbit diagram ] Orbital Elements at Epoch 2457196.5 (2015-Jun-23.0) TDB Reference: JPL 12 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .6600628619783244 4.8294e-07   a 5.566940727700562 1.3445e-07 au q 1.892409898510833 2.6845e-06 au i 17.36960297863376 3.3809e-05 deg node 359.9745411434779 6.1612e-05 deg peri 119.4331735354286 0.00034889 deg M 264.1974146032784 4.873e-05 deg tp 2458473.227025359509 (2018-Dec-20.72702536) 0.00061689 TDB period 4797.592123700158 13.14 0.0001738 4.758e-07 d yr n .0750376419499265 2.7183e-09 deg/d Q 9.241471556890291 2.2319e-07 au   Orbit Determination Parameters    # obs. used (total)      305      data-arc span      4868 days (13.33 yr)      first obs. used      2005-12-05      last obs. used      2019-04-04      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .59345      source      ORB      producer      Otto Matic      solution date      2019-May-15 08:31:30   Additional Information  Earth MOID = .970745 au   Jupiter MOID = .00467122 au   T_jup = 2.418  [ 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 13.5   0.6 12 from 233 observations, assumed slope, autocmod 2.6q comet total magnitude slope K1 16.   n/a 12 autocmod 2.6q comet nuclear magnitude M2 17.6   0.7 12 from 35 observations, autocmod 2.6q comet nuclear magnitude slope K2 5.   n/a 12 autocmod 2.6q comet nuclear phase coefficient PC 0.03   n/a 12 autocmod 2.6q [ show close-approach data ] Alternate Designations  Perihelion  Year (est.)  New-Style  Desig Roman  Numeral  Year/  Letter   2019.0   375P/2018 T1         2005.8   375P/2006 D1        [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ] 2021-Mar-07 09:25 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin