+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   158P/Kowal-LINEAR Classification: Jupiter-family Comet          SPK-ID: 1000468 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ] [ show orbit diagram ] Orbital Elements at Epoch 2455297.5 (2010-Apr-11.0) TDB Reference: JPL 126 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .02957607545062476 1.0258e-07   a 4.719289787662553 1.3284e-07 au q 4.579711716829282 5.1603e-07 au i 7.90848396337982 9.5266e-06 deg node 137.3091496915609 7.2217e-05 deg peri 231.5668548181164 0.00017064 deg M 274.583160724909 0.00015549 deg tp 2456185.993780433195 (2012-Sep-15.49378043) 0.0016241 TDB period 3744.668658668408 10.25 0.00015811 4.329e-07 d yr n .09613667665005503 4.0592e-09 deg/d Q 4.858867858495823 1.3677e-07 au   Orbit Determination Parameters    # obs. used (total)      821      data-arc span      14611 days (40.00 yr)      first obs. used      1979-07-24      last obs. used      2019-07-25      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .80357      source      ORB      producer      Otto Matic      solution date      2019-Nov-07 02:06:30   Additional Information  Earth MOID = 3.5816 au   Jupiter MOID = .411301 au   T_jup = 2.988  [ 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 5.5   0.6 126 from 481 observations, assumed slope, autocmod 2.8 comet total magnitude slope K1 16.   n/a 126 autocmod 2.8 comet nuclear magnitude M2 12.7   0.6 126 from 285 observations, autocmod 2.8 comet nuclear magnitude slope K2 5.   n/a 126 autocmod 2.8 comet nuclear phase coefficient PC 0.03   n/a 126 autocmod 2.8 [ show close-approach data ] Alternate Designations  Perihelion  Year (est.)  New-Style  Desig Roman  Numeral  Year/  Letter   2002.5   158P/2001 RG100         1981.9   158P/1979 O1       1979h  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ] 2021-Feb-25 17:15 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin