+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   19667 (1999 RS144) Classification: Main-belt Asteroid          SPK-ID: 2019667 [ 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 28 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .05173878390049302 4.1033e-08   a 2.990515122134861 1.5762e-08 au q 2.835789506479569 1.179e-07 au i 8.848095661791792 3.7076e-06 deg node 271.3177832211506 3.7539e-05 deg peri 354.9115838061506 7.2512e-05 deg M 108.5916443879275 6.309e-05 deg tp 2458630.714569571102 (2019-May-27.21456957) 0.00033075 TDB period 1888.936815632267 5.17 1.4934e-05 4.089e-08 d yr n .1905833996249898 1.5067e-09 deg/d Q 3.145240737790153 1.6577e-08 au   Orbit Determination Parameters    # obs. used (total)      1781      data-arc span      11460 days (31.38 yr)      first obs. used      1989-09-28      last obs. used      2021-02-12      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .48589      source      ORB      producer      Otto Matic      solution date      2021-Apr-13 03:01:25   Additional Information  Earth MOID = 1.81812 au   Jupiter MOID = 1.93671 au   T_jup = 3.236  [ 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 13.31   n/a E2021B10   diameter diameter 7.655 km 0.325 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.173   0.020 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   19667 (1999 RS144)          Discovered 1999-Sep-09 by LINEAR at Socorro Reference: 20001211/Numbers.arc Last Updated: 2004-04-19 [ show close-approach data ] Alternate Designations  1999 RS144 = 1989 SS12 = 1998 KM36  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Apr-19 15:53 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin