+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   252P/LINEAR Classification: Jupiter-family Comet [NEO]          SPK-ID: 1000298 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ] [ show orbit diagram ] alternate orbits: [epoch=2016-May-13.0] K212/1 (default) [epoch=2016-Jan-26.0] K162/16 Orbital Elements at Epoch 2457521.5 (2016-May-13.0) TDB Reference: JPL K212/1 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .6731023027853387 2.0921e-06   a 3.046997043281076 1.9174e-05 au q .9960563168684656 3.0846e-07 au i 10.42235707347085 1.8495e-05 deg node 190.9498787310189 6.1167e-05 deg peri 343.3108974421889 4.9419e-05 deg M 10.88408111266005 0.00011045 deg tp 2457462.765166095027 (2016-Mar-15.26516609) 5.9781e-05 TDB period 1942.70329180068 5.32 0.018338 5.021e-05 d yr n .1853087918877814 1.7492e-06 deg/d Q 5.097937769693687 3.208e-05 au Additional Model Parameters  Parameter Value Uncertainty (1-sigma)  A1 [EST] 1.11646784726644E-8 5.817E-10 A2 [EST] -7.087052457409711E-9 5.549E-10   Orbit Determination Parameters    # obs. used (total)      86      data-arc span      1744 days (4.77 yr)      first obs. used      2016-04-05      last obs. used      2021-01-13      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      3      norm. resid. RMS      .35293      source      ORB      producer      Davide Farnocchia      solution date      2021-Feb-01 11:58:17   Additional Information  Earth MOID = .0121902 au   Jupiter MOID = .20104 au   T_jup = 2.821   Not valid before 2016-04-01  [ 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 17.1   1. K212/1 2 parameter fit from 221 observations, autocmod 2.9a comet total magnitude slope K1 11.25   n/a K212/1 autocmod 2.9a [ show close-approach data ] Alternate Designations  Perihelion  Year (est.)  New-Style  Desig Roman  Numeral  Year/  Letter   2010.9   252P/2011 L5         2000.2   252P/2000 G1        [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ] 2021-Feb-25 16:45 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin