+ 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 2459396.5 (2021-Jul-01.0) TDB Reference: JPL 24 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1261613009034354 3.5256e-08   a 2.981757789105697 1.6769e-08 au q 2.605575347453171 1.049e-07 au i .6565814823949837 5.0689e-06 deg node 11.52877175669706 0.00032118 deg peri 301.2072595333577 0.000322 deg M 96.81541050036715 2.0796e-05 deg tp 2458890.734779913674 (2020-Feb-11.23477991) 0.00010966 TDB period 1880.645635752243 5.15 1.5865e-05 4.344e-08 d yr n .1914236223753035 1.6148e-09 deg/d Q 3.357940230758223 1.8885e-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.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .58503      source      ORB      producer      Otto Matic      solution date      2021-Jul-08 18:31:24   Additional Information  Earth MOID = 1.59093 au   Jupiter MOID = 1.89715 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 14.84   n/a MPCxxxxx   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-Jul-31 07:30 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin