+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   109741 (2001 RA64) Classification: Main-belt Asteroid          SPK-ID: 2109741 [ 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 17 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2268610177084025 4.0693e-08   a 3.13726529754778 2.8558e-08 au q 2.425542099324837 1.2945e-07 au i 20.51038254057433 6.6394e-06 deg node 341.4579571069826 1.2678e-05 deg peri 256.3629945600316 1.8877e-05 deg M 237.615989377242 1.4786e-05 deg tp 2459690.497434255852 (2022-Apr-20.99743426) 8.691e-05 TDB period 2029.669358506179 5.56 2.7713e-05 7.587e-08 d yr n .1773687908778192 2.4218e-09 deg/d Q 3.848988495770724 3.5037e-08 au   Orbit Determination Parameters    # obs. used (total)      500      data-arc span      10692 days (29.27 yr)      first obs. used      1990-10-10      last obs. used      2020-01-18      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .57565      source      ORB      producer      Otto Matic      solution date      2020-Feb-24 03:31:57   Additional Information  Earth MOID = 1.51148 au   Jupiter MOID = 1.64873 au   T_jup = 3.075  [ 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 14.6   n/a MPO493619   diameter diameter 7.372 km 0.190 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.043   0.003 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   109741 (2001 RA64)          Discovered 2001-Sep-10 by LINEAR at Socorro Reference: 20051019/Numbers.arc Last Updated: 2005-10-26 [ show close-approach data ] Alternate Designations  2001 RA64 = 1999 CL41  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2020-Aug-06 23:13 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin