+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   C/2008 C1 (Chen-Gao) Classification: Comet          SPK-ID: 1002495 [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters ] [ show orbit diagram ] Orbital Elements at Epoch 2454530.5 (2008-Mar-05.0) TDB Reference: JPL 20 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .9999875787277857 3.1496e-05   a 101627.5424194194 2.5769e+05 au q 1.262343368866691 7.6296e-06 au i 61.78448722306108 0.00014086 deg node 307.7824714298148 0.00031373 deg peri 180.9286376220151 0.00064173 deg M 359.9999986963771 4.9583e-06 deg tp 2454573.351401846784 (2008-Apr-16.85140185) 0.00066108 TDB period 11833563950.35645 32398532.38 4.5008e+10 1.232e+08 d yr n 3.042194232525832E-8 1.1571e-07 deg/d Q 203253.82249547 5.1538e+05 au   Orbit Determination Parameters    # obs. used (total)      766      data-arc span      119 days      first obs. used      2008-01-30      last obs. used      2008-05-28      planetary ephem.      DE431      SB-pert. ephem.      SB431-BIG16      norm. resid. RMS      .80912      source      ORB      producer      Otto Matic      solution date      2014-Jun-13 19:44:07   Additional Information  Earth MOID = .277579 au   T_jup = 0.659  [ show covariance matrix ] [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes comet total magnitude M1 11.7   1. 20 from 152 observations, assumed slope, autocmod 2.5c comet total magnitude slope K1 17.   n/a 20 autocmod 2.5c comet nuclear magnitude M2 15.5   0.9 20 from 527 observations, autocmod 2.5c comet nuclear magnitude slope K2 5.   n/a 20 autocmod 2.5c comet nuclear phase coefficient PC 0.03   n/a 20 autocmod 2.5c Alternate Designations  Perihelion  Year (est.)  New-Style  Desig Roman  Numeral  Year/  Letter   2008.3   C/2008 C1        [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters ] 2021-Jan-22 23:38 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin