+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   47104 (1999 CD18) Classification: Outer Main-belt Asteroid          SPK-ID: 2047104 [ 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 28 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1306555215804019 3.7149e-08   a 3.212561076985831 1.9464e-08 au q 2.79282223386335 1.2309e-07 au i 10.99649973509795 6.4647e-06 deg node 32.05997592141755 1.9867e-05 deg peri 98.23133744419252 3.1653e-05 deg M 244.0834040876219 2.5222e-05 deg tp 2459677.702627930733 (2022-Apr-08.20262793) 0.00014956 TDB period 2103.175512843286 5.76 1.9114e-05 5.233e-08 d yr n .1711697372861266 1.5556e-09 deg/d Q 3.632299920108313 2.2007e-08 au   Orbit Determination Parameters    # obs. used (total)      1678      data-arc span      8414 days (23.04 yr)      first obs. used      1997-11-03      last obs. used      2020-11-16      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .47657      source      ORB      producer      Otto Matic      solution date      2020-Dec-17 21:23:48   Additional Information  Earth MOID = 1.83436 au   Jupiter MOID = 1.52641 au   T_jup = 3.149  [ 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 12.8   n/a MPO351167   diameter diameter 7.587 km 0.141 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.255   0.044 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   47104 (1999 CD18)          Discovered 1999-Feb-10 by LINEAR at Socorro Reference: 20020921/Numbers.arc Last Updated: 2004-04-19 [ show close-approach data ] Alternate Designations  1999 CD18 = 2000 GU69  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Jan-25 08:22 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin