+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   204P/LINEAR-NEAT Classification: Jupiter-family Comet          SPK-ID: 1000361 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ] [ show orbit diagram ] Orbital Elements at Epoch 2454757.5 (2008-Oct-18.0) TDB Reference: JPL 48 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .4705293233791104 5.6724e-07   a 3.664462563285444 2.2607e-06 au q 1.940225472834664 1.9724e-06 au i 6.581224664404781 1.6736e-05 deg node 109.1066822496268 4.7901e-05 deg peri 355.0404917170418 0.00036531 deg M 352.6551712789477 0.00011691 deg tp 2454809.774878561700 (2008-Dec-09.27487856) 0.00081961 TDB period 2562.204919533627 7.01 0.002371 6.491e-06 d yr n .1405039843829226 1.3002e-07 deg/d Q 5.388699653736225 3.3244e-06 au Additional Model Parameters  Parameter Value Uncertainty (1-sigma)  A1 [EST] 1.080712377703343E-9 7.367E-10 A2 [EST] -2.05507690784695E-10 1.161E-12   Orbit Determination Parameters    # obs. used (total)      1239      data-arc span      5315 days (14.55 yr)      first obs. used      2001-10-13      last obs. used      2016-05-02      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      2      norm. resid. RMS      .78275      source      ORB      producer      Otto Matic      solution date      2018-Feb-28 16:17:46   Additional Information  Earth MOID = .957336 au   Jupiter MOID = .101693 au   T_jup = 2.891  [ 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 12.5   1. 48 from 582 observations, assumed slope, autocmod 2.6m comet total magnitude slope K1 16.   n/a 48 autocmod 2.6m comet nuclear magnitude M2 16.2   1. 48 from 544 observations, autocmod 2.6m comet nuclear magnitude slope K2 5.   n/a 48 autocmod 2.6m comet nuclear phase coefficient PC 0.03   n/a 48 autocmod 2.6m [ show close-approach data ] Alternate Designations  Perihelion  Year (est.)  New-Style  Desig Roman  Numeral  Year/  Letter   2008.9   204P/2008 R5         2001.9   204P/2001 TU80        [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ] 2021-Apr-14 04:23 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin