+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   26219 (1997 WO21) Classification: Main-belt Asteroid          SPK-ID: 2026219 [ 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 35 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1877028719975197 3.8108e-08   a 3.117048044562403 1.7512e-08 au q 2.531969174443787 1.218e-07 au i 16.59952429465364 4.4421e-06 deg node 246.9206545114754 1.4757e-05 deg peri 194.2527831564798 1.9417e-05 deg M 61.75511364971909 1.1115e-05 deg tp 2458855.686630948437 (2020-Jan-07.18663095) 6.1826e-05 TDB period 2010.08152236033 5.50 1.694e-05 4.638e-08 d yr n .1790972137176165 1.5093e-09 deg/d Q 3.702126914681019 2.08e-08 au   Orbit Determination Parameters    # obs. used (total)      1605      data-arc span      24495 days (67.06 yr)      first obs. used      1953-12-29      last obs. used      2021-01-21      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .4624      source      ORB      producer      Otto Matic      solution date      2021-Feb-24 03:18:16   Additional Information  Earth MOID = 1.54999 au   Jupiter MOID = 1.61447 au   T_jup = 3.126  [ 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 13.11   n/a E2021B10   diameter diameter 7.650 km 0.200 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.229   0.031 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   26219 (1997 WO21)          Discovered 1997-Nov-30 by Kobayashi, T. at Oizumi Reference: 20010705/Numbers.arc Last Updated: 2004-04-19 [ show close-approach data ] Alternate Designations  1997 WO21 = 1991 RG29  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Feb-27 20:28 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin