+ 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 2459000.5 (2020-May-31.0) TDB Reference: JPL 25 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1910257098414177 3.3501e-08   a 2.425528005633684 9.5651e-09 au q 1.962189796617271 8.376e-08 au i 10.71658398081609 4.6212e-06 deg node 302.5198003321199 2.103e-05 deg peri 97.11419119423418 2.5381e-05 deg M 219.9480844423755 1.4338e-05 deg tp 2459537.277643642667 (2021-Nov-18.77764364) 5.6483e-05 TDB period 1379.773714211366 3.78 8.1617e-06 2.235e-08 d yr n .2609123483742871 1.5434e-09 deg/d Q 2.888866214650096 1.1392e-08 au   Orbit Determination Parameters    # obs. used (total)      1347      data-arc span      11955 days (32.73 yr)      first obs. used      1987-09-22      last obs. used      2020-06-15      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .48476      source      ORB      producer      Otto Matic      solution date      2020-Jun-23 17:34:05   Additional Information  Earth MOID = 1.00426 au   Jupiter MOID = 2.60296 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 14.3   n/a MPO337370   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 ] 2020-Oct-28 01:10 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin