+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   20661 (1999 UZ) Classification: Outer Main-belt Asteroid          SPK-ID: 2020661 [ 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 24 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1704164552944417 3.623e-08   a 3.203565562657177 2.0745e-08 au q 2.657625275165797 1.2166e-07 au i 1.460591644857589 5.1398e-06 deg node 43.44497266536162 0.00017135 deg peri 258.6520061935335 0.00017219 deg M 316.6627271914554 1.887e-05 deg tp 2459452.620365906352 (2021-Aug-26.12036591) 0.00011067 TDB period 2094.348025249792 5.73 2.0343e-05 5.57e-08 d yr n .1718912022547269 1.6696e-09 deg/d Q 3.749505850148557 2.428e-08 au   Orbit Determination Parameters    # obs. used (total)      1133      data-arc span      9772 days (26.75 yr)      first obs. used      1993-10-10      last obs. used      2020-07-12      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .55558      source      ORB      producer      Otto Matic      solution date      2021-Apr-13 03:26:15   Additional Information  Earth MOID = 1.64073 au   Jupiter MOID = 1.48974 au   T_jup = 3.170  [ 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 14.0   n/a MPO279729   diameter diameter 8.023 km 0.202 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.057   0.013 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   20661 (1999 UZ)          Discovered 1999-Oct-16 by Korlevic, K. at Visnjan Reference: 20010109/Numbers.arc Last Updated: 2004-04-19 [ show close-approach data ] Alternate Designations  1999 UZ = 1993 TR44  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Apr-21 15:53 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin