+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   13172 (1996 AO) Classification: Main-belt Asteroid          SPK-ID: 2013172 [ 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 27 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .190537789329183 3.3199e-08   a 2.426730967008622 9.5677e-09 au q 1.964347013258129 8.3042e-08 au i 10.71690323890105 4.5809e-06 deg node 302.5176820823406 2.0688e-05 deg peri 96.99694992998752 2.5011e-05 deg M 272.2081223736983 1.4408e-05 deg tp 2459537.230698913783 (2021-Nov-18.73069891) 5.6268e-05 TDB period 1380.800307346936 3.78 8.1659e-06 2.236e-08 d yr n .2607183660696764 1.5419e-09 deg/d Q 2.889114920759116 1.1391e-08 au   Orbit Determination Parameters    # obs. used (total)      1379      data-arc span      12011 days (32.88 yr)      first obs. used      1987-09-22      last obs. used      2020-08-10      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .48836      source      ORB      producer      Otto Matic      solution date      2021-Apr-12 23:48:12   Additional Information  Earth MOID = 1.00544 au   Jupiter MOID = 2.60377 au   T_jup = 3.462  [ 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 14.34   n/a E2021B10   diameter diameter 4.947 km 1.626 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)   geometric albedo albedo 0.181   0.130 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)   13172 (1996 AO)          Discovered 1996-Jan-11 by Kobayashi, T. at Oizumi Reference: 20000124/Numbers.arc Last Updated: 2004-04-19 [ show close-approach data ] Alternate Designations  1996 AO = 1987 SF14 = 1998 PN  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Apr-15 06:36 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin