+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   150197 (1998 RS9) Classification: Main-belt Asteroid          SPK-ID: 2150197 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] [ show orbit diagram ] Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB Reference: JPL 16 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .09570225774875306 4.1334e-08   a 2.290243106750833 9.5989e-09 au q 2.07106167064126 9.6684e-08 au i 2.996366530021592 4.5601e-06 deg node 155.3558880807078 7.8538e-05 deg peri 35.76483385752626 8.1897e-05 deg M 299.9329078118634 2.3817e-05 deg tp 2459411.729665655432 (2021-Jul-16.22966566) 8.4103e-05 TDB period 1265.962390817616 3.47 7.9589e-06 2.179e-08 d yr n .2843686373396098 1.7878e-09 deg/d Q 2.509424542860406 1.0518e-08 au   Orbit Determination Parameters    # obs. used (total)      414      data-arc span      8208 days (22.47 yr)      first obs. used      1998-09-13      last obs. used      2021-03-04      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .55937      source      ORB      producer      Otto Matic      solution date      2021-Apr-13 19:17:31   Additional Information  Earth MOID = 1.07127 au   Jupiter MOID = 2.44444 au   T_jup = 3.591  [ 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 17.1   n/a MPO396228   diameter diameter 2.151 km 0.407 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.055   0.009 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   150197 (1998 RS9)          Discovered 1998-Sep-13 by Spacewatch at Kitt Peak Reference: 20070303/Numbers.arc Last Updated: 2007-03-07 [ show close-approach data ] Alternate Designations  1998 RS9 = 2004 FW63  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Apr-19 06:04 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin