+ 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 14 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .06713099474409034 4.7991e-08   a 3.048214150229408 2.3512e-08 au q 2.843584502131496 1.3855e-07 au i 2.535762011000517 4.9781e-06 deg node 316.4995429245157 9.8993e-05 deg peri 234.601065518358 0.00010468 deg M 106.4627909870096 3.3695e-05 deg tp 2458425.640138929377 (2018-Nov-03.14013893) 0.00018221 TDB period 1943.867411954999 5.32 2.2491e-05 6.158e-08 d yr n .1851978163664663 2.1428e-09 deg/d Q 3.252843798327321 2.5091e-08 au   Orbit Determination Parameters    # obs. used (total)      458      data-arc span      9553 days (26.15 yr)      first obs. used      1994-09-12      last obs. used      2020-11-07      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .55962      source      ORB      producer      Otto Matic      solution date      2020-Dec-18 04:55:01   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 ] 2021-Jan-17 10:41 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin