+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   146867 (2002 AC176) Classification: Main-belt Asteroid          SPK-ID: 2146867 [ 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 12 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .06713098975927519 5.6718e-08   a 3.048214140201768 2.6743e-08 au q 2.843584507971805 1.7306e-07 au i 2.535763407192726 5.8819e-06 deg node 316.4995365340341 0.00011993 deg peri 234.6010994742275 0.00012615 deg M 106.4627615577108 3.8695e-05 deg tp 2458425.640300673405 (2018-Nov-03.14030067) 0.00020933 TDB period 1943.867402362956 5.32 2.5581e-05 7.004e-08 d yr n .1851978172803277 2.4372e-09 deg/d Q 3.252843772431731 2.8538e-08 au   Orbit Determination Parameters    # obs. used (total)      374      data-arc span      9005 days (24.65 yr)      first obs. used      1994-09-12      last obs. used      2019-05-09      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .58573      source      ORB      producer      Otto Matic      solution date      2019-May-30 07:22:30   Additional Information  Earth MOID = 1.84444 au   Jupiter MOID = 1.71821 au   T_jup = 3.233  [ 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 15.4   n/a MPO260126   diameter diameter 6.250 km 1.652 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.029   0.011 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   146867 (2002 AC176)          Discovered 2002-Jan-14 by LINEAR at Socorro Reference: 20070106/Numbers.arc Last Updated: 2007-01-09 [ show close-approach data ] Alternate Designations  2002 AC176 = 1994 RW9  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2020-Aug-05 00:25 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin