+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   26222 (1997 WC45) Classification: Main-belt Asteroid          SPK-ID: 2026222 [ 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 24 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1168015614725651 5.4861e-08   a 2.971781498045668 1.6341e-08 au q 2.624672778718655 1.6548e-07 au i 9.335131616665539 5.0412e-06 deg node 233.4476801372745 2.9913e-05 deg peri 110.402142372778 3.5049e-05 deg M 207.0726295362957 1.9869e-05 deg tp 2459795.388948434859 (2022-Aug-03.88894843) 0.00010512 TDB period 1871.21520868932 5.12 1.5434e-05 4.226e-08 d yr n .1923883465291839 1.5868e-09 deg/d Q 3.318890217372681 1.8249e-08 au   Orbit Determination Parameters    # obs. used (total)      1572      data-arc span      12330 days (33.76 yr)      first obs. used      1986-09-09      last obs. used      2020-06-12      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .50122      source      ORB      producer      Otto Matic      solution date      2020-Nov-13 01:30:11   Additional Information  Earth MOID = 1.63626 au   Jupiter MOID = 2.13653 au   T_jup = 3.232  [ 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 13.4   n/a MPO435945   diameter diameter 7.132 km 0.309 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.200   0.033 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   26222 (1997 WC45)          Discovered 1997-Nov-29 by LINEAR at Socorro Reference: 20010705/Numbers.arc Last Updated: 2004-04-19 [ show close-approach data ] Alternate Designations  1997 WC45 = 1986 RN12 = 1999 CA65  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Jan-28 13:05 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin