+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   102150 (1999 RQ197) Classification: Outer Main-belt Asteroid          SPK-ID: 2102150 [ 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 26 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2466733765779249 3.5539e-08   a 3.208745129622613 3.0829e-08 au q 2.417233133920632 1.1724e-07 au i 25.16856334277523 6.0166e-06 deg node 336.2500535147619 9.5071e-06 deg peri 289.3953225499991 1.5069e-05 deg M 306.1487781313863 1.266e-05 deg tp 2459514.546763197303 (2021-Oct-27.04676320) 7.5677e-05 TDB period 2099.429331926127 5.75 3.0257e-05 8.284e-08 d yr n .1714751692402606 2.4713e-09 deg/d Q 4.000257125324594 3.8434e-08 au   Orbit Determination Parameters    # obs. used (total)      831      data-arc span      7802 days (21.36 yr)      first obs. used      1999-09-08      last obs. used      2021-01-17      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .53482      source      ORB      producer      Otto Matic      solution date      2021-Feb-24 08:30:40   Additional Information  Earth MOID = 1.52182 au   Jupiter MOID = 1.83582 au   T_jup = 2.999  [ 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 13.88   n/a E2021B55   diameter diameter 10.704 km 0.058 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.047   0.010 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   102150 (1999 RQ197)          Discovered 1999-Sep-08 by LINEAR at Socorro Reference: 20051019/Numbers.arc Last Updated: 2005-10-26 [ show close-approach data ] Alternate Designations  1999 RQ197 = 2003 BK20  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Feb-28 19:33 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin