+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   21202 (1994 PW19) Classification: Main-belt Asteroid          SPK-ID: 2021202 [ 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 22 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1262416493169825 3.5244e-08   a 2.981357767455262 1.6833e-08 au q 2.604986245687714 1.0488e-07 au i .6565561601604543 5.0692e-06 deg node 11.52739002460556 0.0003212 deg peri 301.1401642959818 0.00032202 deg M 59.35103074596562 2.0857e-05 deg tp 2458890.511677051808 (2020-Feb-11.01167705) 0.00010958 TDB period 1880.267197700434 5.15 1.5924e-05 4.36e-08 d yr n .191462149869061 1.6215e-09 deg/d Q 3.357729289222811 1.8958e-08 au   Orbit Determination Parameters    # obs. used (total)      1025      data-arc span      10501 days (28.75 yr)      first obs. used      1992-04-06      last obs. used      2021-01-05      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .58484      source      ORB      producer      Otto Matic      solution date      2021-Feb-24 02:51:20   Additional Information  Earth MOID = 1.58895 au   Jupiter MOID = 1.89803 au   T_jup = 3.247  [ 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 14.8   n/a MPO266067   diameter diameter 6.859 km 0.270 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)   geometric albedo albedo 0.049   0.010 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)   21202 (1994 PW19)          Discovered 1994-Aug-12 by Elst, E. W. at La Silla Reference: 20010208/Numbers.arc Last Updated: 2004-04-19 [ show close-approach data ] Alternate Designations  1994 PW19 = 2000 WF183  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Apr-10 20:29 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin