+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   325P/Yang-Gao Classification: Jupiter-family Comet [NEO]          SPK-ID: 1003026 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ] [ show orbit diagram ] Orbital Elements at Epoch 2455051.5 (2009-Aug-08.0) TDB Reference: JPL 28 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .6209634219524268 6.5893e-07   a 3.419528944603882 6.0139e-06 au q 1.296126549697285 9.1115e-07 au i 16.1583173039156 1.957e-05 deg node 259.3039147502904 2.5505e-05 deg peri 346.9555788531768 0.00012282 deg M 12.19570608442939 3.275e-05 deg tp 2454973.255773478708 (2009-May-21.75577348) 0.00010469 TDB period 2309.658936732489 6.32 0.006093 1.668e-05 d yr n .155867169076183 4.1119e-07 deg/d Q 5.54293133951048 9.7484e-06 au Additional Model Parameters  Parameter Value Uncertainty (1-sigma)  A1 [EST] 1.592625803294245E-9 6.638E-10 A2 [EST] -2.720853345659181E-10 4.701E-12   Orbit Determination Parameters    # obs. used (total)      1127      data-arc span      23477 days (64.28 yr)      first obs. used      1951-05-28      last obs. used      2015-09-06      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      2      norm. resid. RMS      .54916      source      ORB      producer      Otto Matic      solution date      2019-May-30 10:13:29   Additional Information  Earth MOID = .287792 au   Jupiter MOID = .0884739 au   T_jup = 2.742  [ 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 15.7   1. 28 2 parameter fit from 186 observations, autocmod 2.6q comet total magnitude slope K1 12.   n/a 28 autocmod 2.6q [ show close-approach data ] Alternate Designations  Perihelion  Year (est.)  New-Style  Desig Roman  Numeral  Year/  Letter   2015.7   325P/2015 J4         2009.4   325P/2009 L2        [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ] 2021-Mar-07 09:55 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin