+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   20844 (2000 UK97) Classification: Main-belt Asteroid          SPK-ID: 2020844 [ 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 32 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1310472044174678 1.9425e-08   a 2.653797142330823 1.1642e-08 au q 2.306024445737304 5.0232e-08 au i 9.578129518967865 8.37e-07 deg node 9.052106617611438 2.2611e-06 deg peri 153.540143102312 6.6068e-06 deg M 138.2485007079824 6.2947e-06 deg tp 2458594.101749907534 (2019-Apr-20.60174991) 2.5512e-05 TDB period 1579.065009134548 4.32 1.0391e-05 2.845e-08 d yr n .2279830139465306 1.5003e-09 deg/d Q 3.001569838924342 1.3168e-08 au   Orbit Determination Parameters    # obs. used (total)      1735      data-arc span      16190 days (44.33 yr)      first obs. used      1976-04-01      last obs. used      2020-07-29      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .46165      source      ORB      producer      Otto Matic      solution date      2021-Apr-13 03:32:44   Additional Information  Earth MOID = 1.31689 au   Jupiter MOID = 1.9745 au   T_jup = 3.357  [ 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 13.76   n/a E2021B10   diameter diameter 4.497 km 0.174 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.348   0.117 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   20844 (2000 UK97)          Discovered 2000-Oct-25 by LINEAR at Socorro Reference: 20010109/Numbers.arc Last Updated: 2004-04-19 [ show close-approach data ] Alternate Designations  2000 UK97 = 1976 GS = 1976 GU7 = 1989 ES1  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Apr-14 15:04 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin