+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   58158 (1989 RA) Classification: Main-belt Asteroid          SPK-ID: 2058158 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB Reference: JPL 17 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2182972170001296 5.5183e-08   a 2.354465885858595 8.997e-09 au q 1.840492535453919 1.2812e-07 au i 9.187552875682622 5.7741e-06 deg node 175.9752552437891 2.3981e-05 deg peri 171.8609736433764 2.5647e-05 deg M 178.3171431120491 8.7998e-06 deg tp 2458346.876546848045 (2018-Aug-16.37654685) 3.1714e-05 TDB period 1319.583967240017 3.61 7.5637e-06 2.071e-08 d yr n .2728132570092981 1.5637e-09 deg/d Q 2.868439236263271 1.0961e-08 au   Orbit Determination Parameters    # obs. used (total)      818      data-arc span      12690 days (34.74 yr)      first obs. used      1985-07-20      last obs. used      2020-04-17      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .53345      source      ORB      producer      Otto Matic      solution date      2020-May-20 11:32:24   Additional Information  Earth MOID = .834728 au   Jupiter MOID = 2.56842 au   T_jup = 3.506  [ show covariance matrix ] [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 15.7   n/a MPO452959   diameter diameter 2.236 km 0.303 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.223   0.058 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   58158 (1989 RA)          Discovered 1989-Sep-01 by Gilmore, A. C., Kilmartin, P. M. at Lake Tekapo Reference: 20030614/Numbers.arc Last Updated: 2004-04-19 Alternate Designations  1989 RA = 2000 QM127  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Mar-01 11:49 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin