+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   16867 (1998 AX) Classification: Main-belt Asteroid          SPK-ID: 2016867 [ 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 28 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .108317393307959 2.0246e-08   a 2.397177690867334 7.8797e-09 au q 2.137521652096592 5.0008e-08 au i 5.994169349108303 1.2185e-06 deg node 346.2749500358464 8.2293e-06 deg peri 100.8906229202094 1.5547e-05 deg M 94.24327321993229 9.8416e-06 deg tp 2458845.607657633317 (2019-Dec-28.10765763) 3.6806e-05 TDB period 1355.65371285284 3.71 6.6842e-06 1.83e-08 d yr n .2655545413897884 1.3093e-09 deg/d Q 2.656833729638076 8.7332e-09 au   Orbit Determination Parameters    # obs. used (total)      1850      data-arc span      13963 days (38.23 yr)      first obs. used      1982-12-22      last obs. used      2021-03-15      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .48752      source      ORB      producer      Otto Matic      solution date      2021-Apr-13 01:44:48   Additional Information  Earth MOID = 1.16318 au   Jupiter MOID = 2.50939 au   T_jup = 3.513  [ 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 14.17   n/a E2021B10   diameter diameter 4.770 km 0.173 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.214   0.019 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   16867 (1998 AX)          Discovered 1998-Jan-05 by Kobayashi, T. at Oizumi Reference: 20000913/Numbers.arc Last Updated: 2004-04-19 [ show close-approach data ] Alternate Designations  1998 AX = 1982 YM3 = 1983 BG = 1983 CD6 = 1996 QG  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Apr-16 09:15 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin