+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   160543 (1998 GW8) Classification: Main-belt Asteroid          SPK-ID: 2160543 [ 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 21 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1143877193457109 5.7551e-08   a 2.592995009802464 1.5109e-08 au q 2.296388224356351 1.4657e-07 au i 13.4473355744846 5.957e-06 deg node 77.85975047772901 1.946e-05 deg peri 143.9907194112764 3.0321e-05 deg M 92.65578879758171 2.0284e-05 deg tp 2458607.971671262220 (2019-May-04.47167126) 8.6059e-05 TDB period 1525.109226087436 4.18 1.333e-05 3.65e-08 d yr n .2360486671000972 2.0632e-09 deg/d Q 2.889601795248578 1.6838e-08 au   Orbit Determination Parameters    # obs. used (total)      698      data-arc span      9175 days (25.12 yr)      first obs. used      1994-06-10      last obs. used      2019-07-24      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .52485      source      ORB      producer      Otto Matic      solution date      2020-Feb-24 13:21:42   Additional Information  Earth MOID = 1.29855 au   Jupiter MOID = 2.14113 au   T_jup = 3.371  [ 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 15.1   n/a MPO475384   diameter diameter 2.549 km 0.289 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.298   0.104 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   160543 (1998 GW8)          Discovered 1998-Apr-02 by LINEAR at Socorro Reference: 20070828/Numbers.arc Last Updated: 2007-08-30 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2020-Jul-04 09:53 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin