+ 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 2459396.5 (2021-Jul-01.0) TDB Reference: JPL 37 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1498774310534772 3.0024e-08   a 2.757228467957579 1.0284e-08 au q 2.343982148352583 8.5836e-08 au i 2.351884614024341 3.9026e-06 deg node 175.7849667626208 7.0005e-05 deg peri 97.34440421277402 7.1485e-05 deg M 318.2227357061171 1.5783e-05 deg tp 2459590.564033875082 (2022-Jan-11.06403388) 7.3578e-05 TDB period 1672.27446257794 4.58 9.3559e-06 2.562e-08 d yr n .2152756667975615 1.2044e-09 deg/d Q 3.170474787562576 1.1825e-08 au   Orbit Determination Parameters    # obs. used (total)      2129      data-arc span      11773 days (32.23 yr)      first obs. used      1989-04-03      last obs. used      2021-06-27      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .49705      source      ORB      producer      Otto Matic      solution date      2021-Jul-08 02:43:03   Additional Information  Earth MOID = 1.32903 au   Jupiter MOID = 1.93488 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 13.98   n/a MPCxxxxx   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-Jul-26 23:11 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin