+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   190385 (1999 RP202) Classification: Main-belt Asteroid          SPK-ID: 2190385 [ 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 21 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2524218984542609 5.6334e-08   a 2.772683336945404 2.0177e-08 au q 2.07279734522115 1.5219e-07 au i 8.630509037813955 6.7613e-06 deg node 229.5098446851148 3.36e-05 deg peri 189.4527686827778 3.5289e-05 deg M 179.3173516299686 1.2984e-05 deg tp 2458360.520570115819 (2018-Aug-30.02057012) 5.567e-05 TDB period 1686.354343344916 4.62 1.8408e-05 5.04e-08 d yr n .2134782653602524 2.3303e-09 deg/d Q 3.472569328669657 2.527e-08 au   Orbit Determination Parameters    # obs. used (total)      454      data-arc span      7594 days (20.79 yr)      first obs. used      1999-09-08      last obs. used      2020-06-23      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .55873      source      ORB      producer      Otto Matic      solution date      2021-Apr-13 22:07:25   Additional Information  Earth MOID = 1.08488 au   Jupiter MOID = 1.89252 au   T_jup = 3.273  [ 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 15.47   n/a E2021B55   diameter diameter 3.710 km 1.031 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.097   0.051 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   190385 (1999 RP202)          Discovered 1999-Sep-08 by LINEAR at Socorro Reference: 20080917/Numbers.arc Last Updated: 2008-09-19 [ show close-approach data ] Alternate Designations  1999 RP202 = 1999 TB111  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Apr-20 16:57 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin