+ 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 2459200.5 (2020-Dec-17.0) TDB Reference: JPL 16 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .06808928032596824 4.7642e-08   a 3.044845510116509 2.3122e-08 au q 2.83752417062892 1.3695e-07 au i 2.536622383939756 4.8099e-06 deg node 316.4988081354799 9.8153e-05 deg peri 233.9738871077892 0.00010351 deg M 144.1273536839239 3.2461e-05 deg tp 2458423.555078838705 (2018-Nov-01.05507884) 0.00017518 TDB period 1940.645994454724 5.31 2.2105e-05 6.052e-08 d yr n .1855052395071939 2.113e-09 deg/d Q 3.252166849604098 2.4696e-08 au   Orbit Determination Parameters    # obs. used (total)      465      data-arc span      9584 days (26.24 yr)      first obs. used      1994-09-12      last obs. used      2020-12-08      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .55862      source      ORB      producer      Otto Matic      solution date      2021-Apr-13 19:03:01   Additional Information  Earth MOID = 1.8379 au   Jupiter MOID = 1.71779 au   T_jup = 3.234  [ 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 15.45   n/a E2021B55   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-Jun-25 08:43 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin