+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   117028 (2004 JW12) Classification: Outer Main-belt Asteroid          SPK-ID: 2117028 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] [ show orbit diagram ] Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB Reference: JPL 19 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1135639958556736 6.0112e-08   a 3.223002950299036 2.968e-08 au q 2.856985856608453 1.933e-07 au i 4.481685462677884 7.0752e-06 deg node 339.1018406748192 5.9819e-05 deg peri 327.0113018953898 6.6194e-05 deg M 215.8442508179411 3.2126e-05 deg tp 2459846.789491445360 (2022-Sep-24.28949145) 0.00019435 TDB period 2113.437852107858 5.79 2.9194e-05 7.993e-08 d yr n .1703385787478683 2.3529e-09 deg/d Q 3.58902004398962 3.3051e-08 au   Orbit Determination Parameters    # obs. used (total)      592      data-arc span      8033 days (21.99 yr)      first obs. used      1998-04-21      last obs. used      2020-04-18      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .57164      source      ORB      producer      Otto Matic      solution date      2020-May-20 20:07:39   Additional Information  Earth MOID = 1.84349 au   Jupiter MOID = 1.66432 au   T_jup = 3.174  [ 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 14.7   n/a MPO338084   diameter diameter 6.458 km 0.377 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.067   0.015 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   117028 (2004 JW12)          Discovered 2004-May-13 by Broughton, J. at Reedy Creek Reference: 20051019/Numbers.arc Last Updated: 2005-10-26 [ show close-approach data ] Alternate Designations  2004 JW12 = 2002 AG73  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2020-Aug-11 17:00 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin