+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   70018 (1998 YP9) Classification: Main-belt Asteroid          SPK-ID: 2070018 [ 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 25 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1204565652023672 3.6711e-08   a 3.156962974666513 2.0335e-08 au q 2.776686058267137 1.2027e-07 au i 4.762085350198646 5.1673e-06 deg node 170.6890341178198 4.2959e-05 deg peri 242.722239135007 4.837e-05 deg M 307.8470911695185 2.0076e-05 deg tp 2459297.310113507801 (2021-Mar-23.81011351) 0.00011374 TDB period 2048.814596518867 5.61 1.9796e-05 5.42e-08 d yr n .1757113604186902 1.6977e-09 deg/d Q 3.53723989106589 2.2785e-08 au   Orbit Determination Parameters    # obs. used (total)      1033      data-arc span      8014 days (21.94 yr)      first obs. used      1998-12-08      last obs. used      2020-11-16      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .52391      source      ORB      producer      Otto Matic      solution date      2020-Dec-17 21:54:07   Additional Information  Earth MOID = 1.79183 au   Jupiter MOID = 1.83513 au   T_jup = 3.189  [ 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 14.3   n/a MPO449442   diameter diameter 7.551 km 0.101 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.078   0.008 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   70018 (1998 YP9)          Discovered 1998-Dec-25 by Korlevic, K., Juric, M. at Visnjan Reference: 20031109/Numbers.arc Last Updated: 2004-04-19 [ show close-approach data ] Alternate Designations  1998 YP9 = 2000 DM13  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Jan-27 20:53 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin