+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   162P/Siding Spring Classification: Jupiter-family Comet [NEO]          SPK-ID: 1000525 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ] [ show orbit diagram ] Orbital Elements at Epoch 2454968.5 (2009-May-17.0) TDB Reference: JPL 126 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .5960656231487337 2.9329e-08   a 3.051941801871136 6.757e-09 au q 1.232784209925148 8.9546e-08 au i 27.81695758145402 6.6643e-06 deg node 31.25347630874813 7.567e-06 deg peri 356.3200314869923 1.1044e-05 deg M 305.3833183616944 1.6775e-06 deg tp 2455263.951097594027 (2010-Mar-08.45109759) 9.296e-06 TDB period 1947.434226015885 5.33 6.4674e-06 1.771e-08 d yr n .1848586181708935 6.1392e-10 deg/d Q 4.871099393817123 1.0785e-08 au   Orbit Determination Parameters    # obs. used (total)      2643      data-arc span      11270 days (30.86 yr)      first obs. used      1990-03-23      last obs. used      2021-01-29      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .46663      source      ORB      producer      Otto Matic      solution date      2021-Jan-30 21:13:01   Additional Information  Earth MOID = .238488 au   Jupiter MOID = .585222 au   T_jup = 2.793  [ 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 15.3   0.7 126 2 parameter fit from 1071 observations, autocmod 2.8 comet total magnitude slope K1 4.5   n/a 126 autocmod 2.8 rotation period rot_per 32.853 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so. Published Reference List: [Kokotankekova, R.; Snodgrass, C.; Lacerda, P.; Green S.F.; et al. (2017) Mon. Not. Royal Ast. Soc. 471, 2974-3007.] [ show close-approach data ] Alternate Designations  Perihelion  Year (est.)  New-Style  Desig Roman  Numeral  Year/  Letter   2004.9   162P/2004 TU12        [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ] 2021-Mar-05 11:43 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin