+ 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 2459200.5 (2020-Dec-17.0) TDB Reference: JPL 27 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1263420995876982 3.8405e-08   a 3.176331762296857 2.1843e-08 au q 2.775027338461179 1.2626e-07 au i 7.354936875717101 4.4444e-06 deg node 143.6210852171907 3.2477e-05 deg peri 264.8528619972156 3.8124e-05 deg M 285.1188821121586 2.2942e-05 deg tp 2459630.587709015551 (2022-Feb-20.08770902) 0.00013431 TDB period 2067.698501476812 5.66 2.1329e-05 5.84e-08 d yr n .1741066213197316 1.796e-09 deg/d Q 3.577636186132536 2.4603e-08 au   Orbit Determination Parameters    # obs. used (total)      1848      data-arc span      13884 days (38.01 yr)      first obs. used      1982-11-11      last obs. used      2020-11-15      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .5354      source      ORB      producer      Otto Matic      solution date      2020-Dec-18 03:15:57   Additional Information  Earth MOID = 1.79659 au   Jupiter MOID = 1.84678 au   T_jup = 3.176  [ 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-Apr-11 05:32 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin