+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   21345 (1997 ED3) Classification: Main-belt Asteroid          SPK-ID: 2021345 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB Reference: JPL 34 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1188867916718825 4.3833e-08   a 2.644810077099462 1.1666e-08 au q 2.330377092451643 1.1805e-07 au i 12.56877992062735 3.8887e-06 deg node 120.3852847085883 2.0461e-05 deg peri 40.57862152437686 2.5034e-05 deg M 272.3008188870616 1.6325e-05 deg tp 2459779.221800160471 (2022-Jul-18.72180016) 7.2466e-05 TDB period 1571.050565230908 4.30 1.0394e-05 2.846e-08 d yr n .2291460300306046 1.5161e-09 deg/d Q 2.959243061747282 1.3053e-08 au   Orbit Determination Parameters    # obs. used (total)      1357      data-arc span      10610 days (29.05 yr)      first obs. used      1992-01-26      last obs. used      2021-02-12      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .48772      source      ORB      producer      Otto Matic      solution date      2021-Jul-09 10:14:19   Additional Information  Earth MOID = 1.35597 au   Jupiter MOID = 2.08289 au   T_jup = 3.349  [ show covariance matrix ] [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 14.38   n/a E2021B10   diameter diameter 8.078 km 0.033 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.054   0.005 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   21345 (1997 ED3)          Discovered 1997-Mar-03 by Beijing Schmidt CCD Asteroid Program at Xinglong Reference: 20010208/Numbers.arc Last Updated: 2004-04-19 Alternate Designations  1997 ED3 = 1992 BB3 = 1999 VW87  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Jul-31 07:24 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin