+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   11498 Julgeerts (1989 GS4) Classification: Main-belt Asteroid          SPK-ID: 2011498 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] [ show orbit diagram ] Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB Reference: JPL 32 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1499363668513351 3.1997e-08   a 2.758290878133597 1.4563e-08 au q 2.344722765147067 8.8648e-08 au i 2.35126416733743 4.135e-06 deg node 175.7876953142012 8.5949e-05 deg peri 97.19297497610003 8.7698e-05 deg M 233.1583952161555 2.1715e-05 deg tp 2459590.046070359190 (2022-Jan-10.54607036) 0.00010377 TDB period 1673.241092234591 4.58 1.3251e-05 3.628e-08 d yr n .2151513022664444 1.7039e-09 deg/d Q 3.171858991120127 1.6746e-08 au   Orbit Determination Parameters    # obs. used (total)      1738      data-arc span      11546 days (31.61 yr)      first obs. used      1989-04-03      last obs. used      2020-11-12      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .52479      source      ORB      producer      Otto Matic      solution date      2020-Dec-17 20:16:27   Additional Information  Earth MOID = 1.32991 au   Jupiter MOID = 1.93512 au   T_jup = 3.325  [ 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 14.0   n/a MPO458939   diameter diameter 5.882 km 0.279 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.154   0.034 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   11498 Julgeerts           Discovered 1989 Apr. 3 by E. W. Elst at the European Southern Observatory. Julien Armand Geerts (b. 1909) is a well-known commercial artist in Belgium. He was for many years a good friend of the discoverer's parents. The naming is on the occasion of Geerts' ninetieth birthday. NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character) Reference: 19991123/MPCPages.arc Last Updated: 2010-06-11 [ show close-approach data ] Alternate Designations  1989 GS4 = 1990 RX6  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Jan-19 00:04 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin