+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   120459 (1990 SQ6) Classification: Main-belt Asteroid          SPK-ID: 2120459 [ 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 12 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1950297345284012 5.0775e-08   a 2.385226984225292 1.4737e-08 au q 1.920036798701855 1.2145e-07 au i 4.429059351479912 5.1873e-06 deg node 144.9050297879962 6.8923e-05 deg peri 203.4418540773686 7.0033e-05 deg M 30.16146740771454 1.5513e-05 deg tp 2458887.769102701227 (2020-Feb-08.26910270) 5.7258e-05 TDB period 1345.528799344097 3.68 1.247e-05 3.414e-08 d yr n .2675528016758085 2.4796e-09 deg/d Q 2.85041716974873 1.7611e-08 au   Orbit Determination Parameters    # obs. used (total)      325      data-arc span      10046 days (27.50 yr)      first obs. used      1990-09-15      last obs. used      2018-03-18      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .59392      source      ORB      producer      Otto Matic      solution date      2018-Oct-04 04:42:39   Additional Information  Earth MOID = .914252 au   Jupiter MOID = 2.57027 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 16.6   n/a MPO475058   diameter diameter 2.768 km 0.825 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.070   0.028 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   120459 (1990 SQ6)          Discovered 1990-Sep-22 by Elst, E. W. at La Silla Reference: 20060314/Numbers.arc Last Updated: 2006-03-23 Alternate Designations  1990 SQ6 = 2001 QN215  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2020-Nov-01 02:20 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin