+ View the NASA Portal + Near-Earth Object (NEO) Program Search JPL JPL Small-Body Database Browser Search: [ help ]   P/2012 TK8 (Tenagra) Classification: Jupiter-family Comet          SPK-ID: 1003215 [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Close-Approach Data ] [ show orbit diagram ] Orbital Elements at Epoch 2456228.5 (2012-Oct-28.0) TDB Reference: JPL 7 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2612001949568762 0.00021319   a 4.183786862242212 0.00076606 AU q 3.090980918166529 0.00034358 AU i 6.294533021874832 9.6282e-05 deg node 289.7451264481915 0.0047654 deg peri 128.2286487364945 0.048335 deg M 337.5627614939389 0.017541 deg tp 2456423.313773375632 (2013-May-10.81377338) 0.20219 JED period 3125.739310400529 8.56 0.8585 0.00235 d yr n .1151727525075883 3.1633e-05 deg/d Q 5.276592806317895 0.00096616 AU   Orbit Determination Parameters    # obs. used (total)      55      data-arc span      123 days      first obs. used      2012-10-06      last obs. used      2013-02-06      planetary ephem.      DE405      SB-pert. ephem.      SB405-CPV-2      condition code      5      fit RMS      .42262      data source      ORB      producer      Otto Matic      solution date      2013-Mar-01 08:51:12   Additional Information  Earth MOID = 2.10846 AU   T_jup = 2.964  [ show covariance matrix ] [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Close-Approach Data ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes comet total magnitude M1 13.0 mag 0.5 7 from 31 observations, assumed slope, autocmod 2.5b comet total magnitude slope K1 10.   n/a 7 autocmod 2.5b comet nuclear magnitude M2 15.7 mag 0.5 7 from 12 observations, autocmod 2.5b comet nuclear magnitude slope K2 5.   n/a 7 autocmod 2.5b comet nuclear phase coefficient PC 0.03   n/a 7 autocmod 2.5b [ show close-approach data ] Alternate Designations  Perihelion  Year (est.)  New-Style  Desig Roman  Numeral  Year/  Letter   2013.4   P/2012 TK8        [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Close-Approach Data ] 2013-May-22 15:43 UT (server date/time)   Site Manager:   Donald K. Yeomans Webmaster:   Alan B. Chamberlin