+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   21164 (1993 UZ7) Classification: Main-belt Asteroid          SPK-ID: 2021164 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] [ show orbit diagram ] Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB Reference: JPL 29 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1256010928029992 3.8213e-08   a 3.172372248955629 2.1077e-08 au q 2.773918827708894 1.2551e-07 au i 7.357951240178382 4.2898e-06 deg node 143.6242608466738 3.2391e-05 deg peri 265.272201029108 3.7986e-05 deg M 318.8183358127215 2.3162e-05 deg tp 2459632.589151950813 (2022-Feb-22.08915195) 0.00013414 TDB period 2063.833416633702 5.65 2.0567e-05 5.631e-08 d yr n .17443268293775 1.7383e-09 deg/d Q 3.570825670202364 2.3724e-08 au   Orbit Determination Parameters    # obs. used (total)      1876      data-arc span      14074 days (38.53 yr)      first obs. used      1982-11-11      last obs. used      2021-05-24      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .5326      source      ORB      producer      Otto Matic      solution date      2021-Jul-08 05:06:11   Additional Information  Earth MOID = 1.79599 au   Jupiter MOID = 1.85083 au   T_jup = 3.177  [ 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 13.05   n/a E2021B10   diameter diameter 16.587 km 3.171 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)   geometric albedo albedo 0.043   0.035 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2017AJ....154..168M)   21164 (1993 UZ7)          Discovered 1993-Oct-20 by Elst, E. W. at La Silla Reference: 20010208/Numbers.arc Last Updated: 2004-04-19 [ show close-approach data ] Alternate Designations  1993 UZ7 = 1982 VD10 = 1987 SQ22 = 1998 OE15  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Jul-31 07:22 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin