+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   117129 (2004 PL51) Classification: Outer Main-belt Asteroid          SPK-ID: 2117129 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] [ show orbit diagram ] Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB Reference: JPL 15 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1375301011875791 7.2368e-08   a 3.221665421598475 3.5136e-08 au q 2.778589450173512 2.4393e-07 au i 8.600131874377661 6.1641e-06 deg node 113.0994784906352 4.6622e-05 deg peri 177.0114764579089 5.7171e-05 deg M 325.5465368951398 3.939e-05 deg tp 2459402.638696843800 (2021-Jul-07.13869684) 0.00023225 TDB period 2112.122390782331 5.78 3.4553e-05 9.46e-08 d yr n .1704446681551706 2.7884e-09 deg/d Q 3.664741393023438 3.9968e-08 au   Orbit Determination Parameters    # obs. used (total)      381      data-arc span      8941 days (24.48 yr)      first obs. used      1996-01-16      last obs. used      2020-07-09      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .55596      source      ORB      producer      Otto Matic      solution date      2021-Apr-13 16:51:17   Additional Information  Earth MOID = 1.76041 au   Jupiter MOID = 1.52666 au   T_jup = 3.156  [ show covariance matrix ] [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 14.91   n/a E2021B55   diameter diameter 6.135 km 0.263 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.056   0.009 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   117129 (2004 PL51)          Discovered 2004-Aug-08 by LINEAR at Socorro Reference: 20051019/Numbers.arc Last Updated: 2005-10-26 [ show close-approach data ] Alternate Designations  2004 PL51 = 1996 BH12  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Apr-20 11:55 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin