+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   20233 (1998 AZ6) Classification: Main-belt Asteroid          SPK-ID: 2020233 [ 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 30 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1942741320069022 3.9075e-08   a 2.142150681376684 6.8944e-09 au q 1.725986217124235 8.5343e-08 au i 2.021840214617606 3.5469e-06 deg node 78.03078450820496 0.00011022 deg peri 245.5974732684521 0.00011054 deg M 246.3018056596376 8.8911e-06 deg tp 2459562.180020189497 (2021-Dec-13.68002019) 2.9083e-05 TDB period 1145.179200282133 3.14 5.5285e-06 1.514e-08 d yr n .3143612806723246 1.5176e-09 deg/d Q 2.558315145629134 8.2338e-09 au   Orbit Determination Parameters    # obs. used (total)      1617      data-arc span      11138 days (30.49 yr)      first obs. used      1990-09-16      last obs. used      2021-03-15      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .54533      source      ORB      producer      Otto Matic      solution date      2021-Apr-13 03:15:41   Additional Information  Earth MOID = .712966 au   Jupiter MOID = 2.75852 au   T_jup = 3.687  [ 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 15.15   n/a E2021B10   diameter diameter 2.750 km 0.213 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.234   0.047 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   20233 (1998 AZ6)          Discovered 1998-Jan-05 by Beijing Schmidt CCD Asteroid Program at Xinglong Reference: 20010109/Numbers.arc Last Updated: 2004-04-19 [ show close-approach data ] Alternate Designations  1998 AZ6 = 1990 SQ18 = 1999 JO  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Apr-14 15:10 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin