+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   26106 (1990 WJ2) Classification: Main-belt Asteroid          SPK-ID: 2026106 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] [ show orbit diagram ] Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB Reference: JPL 27 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .08144000786645973 5.3087e-08   a 2.653915586686515 1.3095e-08 au q 2.437780680429845 1.4556e-07 au i 21.56747973103584 5.5128e-06 deg node 216.4662647559108 9.212e-06 deg peri 195.692384340887 2.4913e-05 deg M 303.5843396372216 2.2252e-05 deg tp 2459247.972109200145 (2021-Feb-02.47210920) 9.7429e-05 TDB period 1579.170725631205 4.32 1.1688e-05 3.2e-08 d yr n .2279677517806732 1.6872e-09 deg/d Q 2.870050492943184 1.4161e-08 au   Orbit Determination Parameters    # obs. used (total)      1470      data-arc span      10963 days (30.02 yr)      first obs. used      1990-11-11      last obs. used      2020-11-16      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .44448      source      ORB      producer      Otto Matic      solution date      2020-Dec-17 20:50:11   Additional Information  Earth MOID = 1.45044 au   Jupiter MOID = 2.52297 au   T_jup = 3.285  [ 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 13.7   n/a MPO302220   diameter diameter 4.978 km 0.171 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.179   0.040 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   26106 (1990 WJ2)          Discovered 1990-Nov-18 by Elst, E. W. at La Silla Reference: 20010705/Numbers.arc Last Updated: 2004-04-19 [ show close-approach data ] Alternate Designations  1990 WJ2 = 2001 FP8  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Jan-21 22:03 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin